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-rw-r--r--Documentation/acpi/enumeration.txt32
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-grgpio.txt26
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-mcp23s08.txt47
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-omap.txt7
-rw-r--r--drivers/gpio/Kconfig11
-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/gpio-74x164.c8
-rw-r--r--drivers/gpio/gpio-adp5520.c4
-rw-r--r--drivers/gpio/gpio-em.c94
-rw-r--r--drivers/gpio/gpio-generic.c62
-rw-r--r--drivers/gpio/gpio-grgpio.c505
-rw-r--r--drivers/gpio/gpio-ich.c17
-rw-r--r--drivers/gpio/gpio-lpc32xx.c2
-rw-r--r--drivers/gpio/gpio-lynxpoint.c1
-rw-r--r--drivers/gpio/gpio-max7300.c4
-rw-r--r--drivers/gpio/gpio-max7301.c7
-rw-r--r--drivers/gpio/gpio-max732x.c5
-rw-r--r--drivers/gpio/gpio-mc33880.c19
-rw-r--r--drivers/gpio/gpio-mcp23s08.c137
-rw-r--r--drivers/gpio/gpio-mvebu.c85
-rw-r--r--drivers/gpio/gpio-omap.c116
-rw-r--r--drivers/gpio/gpio-pca953x.c3
-rw-r--r--drivers/gpio/gpio-pcf857x.c8
-rw-r--r--drivers/gpio/gpio-pxa.c4
-rw-r--r--drivers/gpio/gpio-samsung.c1
-rw-r--r--drivers/gpio/gpio-sch.c111
-rw-r--r--drivers/gpio/gpio-stp-xway.c2
-rw-r--r--drivers/gpio/gpio-tc3589x.c8
-rw-r--r--drivers/gpio/gpio-tegra.c11
-rw-r--r--drivers/gpio/gpio-timberdale.c3
-rw-r--r--drivers/gpio/gpio-tps65910.c2
-rw-r--r--drivers/gpio/gpio-viperboard.c4
-rw-r--r--drivers/gpio/gpiolib-acpi.c217
-rw-r--r--drivers/gpio/gpiolib-of.c2
-rw-r--r--include/linux/acpi_gpio.h19
-rw-r--r--include/linux/basic_mmio_gpio.h1
36 files changed, 1293 insertions, 293 deletions
diff --git a/Documentation/acpi/enumeration.txt b/Documentation/acpi/enumeration.txt
index 94a656131885..b0d541042ac6 100644
--- a/Documentation/acpi/enumeration.txt
+++ b/Documentation/acpi/enumeration.txt
@@ -199,6 +199,8 @@ the device to the driver. For example:
{
Name (SBUF, ResourceTemplate()
{
+ ...
+ // Used to power on/off the device
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000,
IoRestrictionOutputOnly, "\\_SB.PCI0.GPI0",
0x00, ResourceConsumer,,)
@@ -206,10 +208,20 @@ the device to the driver. For example:
// Pin List
0x0055
}
+
+ // Interrupt for the device
+ GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone,
+ 0x0000, "\\_SB.PCI0.GPI0", 0x00, ResourceConsumer,,)
+ {
+ // Pin list
+ 0x0058
+ }
+
...
- Return (SBUF)
}
+
+ Return (SBUF)
}
These GPIO numbers are controller relative and path "\\_SB.PCI0.GPI0"
@@ -220,6 +232,24 @@ The driver can do this by including <linux/acpi_gpio.h> and then calling
acpi_get_gpio(path, gpio). This will return the Linux GPIO number or
negative errno if there was no translation found.
+In a simple case of just getting the Linux GPIO number from device
+resources one can use acpi_get_gpio_by_index() helper function. It takes
+pointer to the device and index of the GpioIo/GpioInt descriptor in the
+device resources list. For example:
+
+ int gpio_irq, gpio_power;
+ int ret;
+
+ gpio_irq = acpi_get_gpio_by_index(dev, 1, NULL);
+ if (gpio_irq < 0)
+ /* handle error */
+
+ gpio_power = acpi_get_gpio_by_index(dev, 0, NULL);
+ if (gpio_power < 0)
+ /* handle error */
+
+ /* Now we can use the GPIO numbers */
+
Other GpioIo parameters must be converted first by the driver to be
suitable to the gpiolib before passing them.
diff --git a/Documentation/devicetree/bindings/gpio/gpio-grgpio.txt b/Documentation/devicetree/bindings/gpio/gpio-grgpio.txt
new file mode 100644
index 000000000000..e466598105fc
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-grgpio.txt
@@ -0,0 +1,26 @@
+Aeroflex Gaisler GRGPIO General Purpose I/O cores.
+
+The GRGPIO GPIO core is available in the GRLIB VHDL IP core library.
+
+Note: In the ordinary environment for the GRGPIO core, a Leon SPARC system,
+these properties are built from information in the AMBA plug&play.
+
+Required properties:
+
+- name : Should be "GAISLER_GPIO" or "01_01a"
+
+- reg : Address and length of the register set for the device
+
+- interrupts : Interrupt numbers for this device
+
+Optional properties:
+
+- nbits : The number of gpio lines. If not present driver assumes 32 lines.
+
+- irqmap : An array with an index for each gpio line. An index is either a valid
+ index into the interrupts property array, or 0xffffffff that indicates
+ no irq for that line. Driver provides no interrupt support if not
+ present.
+
+For further information look in the documentation for the GLIB IP core library:
+http://www.gaisler.com/products/grlib/grip.pdf
diff --git a/Documentation/devicetree/bindings/gpio/gpio-mcp23s08.txt b/Documentation/devicetree/bindings/gpio/gpio-mcp23s08.txt
new file mode 100644
index 000000000000..629d0ef17308
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-mcp23s08.txt
@@ -0,0 +1,47 @@
+Microchip MCP2308/MCP23S08/MCP23017/MCP23S17 driver for
+8-/16-bit I/O expander with serial interface (I2C/SPI)
+
+Required properties:
+- compatible : Should be
+ - "mcp,mcp23s08" for 8 GPIO SPI version
+ - "mcp,mcp23s17" for 16 GPIO SPI version
+ - "mcp,mcp23008" for 8 GPIO I2C version or
+ - "mcp,mcp23017" for 16 GPIO I2C version of the chip
+- #gpio-cells : Should be two.
+ - first cell is the pin number
+ - second cell is used to specify flags. Flags are currently unused.
+- gpio-controller : Marks the device node as a GPIO controller.
+- reg : For an address on its bus. I2C uses this a the I2C address of the chip.
+ SPI uses this to specify the chipselect line which the chip is
+ connected to. The driver and the SPI variant of the chip support
+ multiple chips on the same chipselect. Have a look at
+ mcp,spi-present-mask below.
+
+Required device specific properties (only for SPI chips):
+- mcp,spi-present-mask : This is a present flag, that makes only sense for SPI
+ chips - as the name suggests. Multiple SPI chips can share the same
+ SPI chipselect. Set a bit in bit0-7 in this mask to 1 if there is a
+ chip connected with the corresponding spi address set. For example if
+ you have a chip with address 3 connected, you have to set bit3 to 1,
+ which is 0x08. mcp23s08 chip variant only supports bits 0-3. It is not
+ possible to mix mcp23s08 and mcp23s17 on the same chipselect. Set at
+ least one bit to 1 for SPI chips.
+- spi-max-frequency = The maximum frequency this chip is able to handle
+
+Example I2C:
+gpiom1: gpio@20 {
+ compatible = "mcp,mcp23017";
+ gpio-controller;
+ #gpio-cells = <2>;
+ reg = <0x20>;
+};
+
+Example SPI:
+gpiom1: gpio@0 {
+ compatible = "mcp,mcp23s17";
+ gpio-controller;
+ #gpio-cells = <2>;
+ spi-present-mask = <0x01>;
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+};
diff --git a/Documentation/devicetree/bindings/gpio/gpio-omap.txt b/Documentation/devicetree/bindings/gpio/gpio-omap.txt
index bff51a2fee1e..1b524c0c79fe 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-omap.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-omap.txt
@@ -20,8 +20,11 @@ Required properties:
8 = active low level-sensitive.
OMAP specific properties:
-- ti,hwmods: Name of the hwmod associated to the GPIO:
- "gpio<X>", <X> being the 1-based instance number from the HW spec
+- ti,hwmods: Name of the hwmod associated to the GPIO:
+ "gpio<X>", <X> being the 1-based instance number
+ from the HW spec.
+- ti,gpio-always-on: Indicates if a GPIO bank is always powered and
+ so will never lose its logic state.
Example:
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index b166e30b3bc4..ff7f0c87745a 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -297,12 +297,21 @@ config GPIO_GE_FPGA
config GPIO_LYNXPOINT
bool "Intel Lynxpoint GPIO support"
- depends on ACPI
+ depends on ACPI && X86
select IRQ_DOMAIN
help
driver for GPIO functionality on Intel Lynxpoint PCH chipset
Requires ACPI device enumeration code to set up a platform device.
+config GPIO_GRGPIO
+ tristate "Aeroflex Gaisler GRGPIO support"
+ depends on OF
+ select GPIO_GENERIC
+ select IRQ_DOMAIN
+ help
+ Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB
+ VHDL IP core library.
+
comment "I2C GPIO expanders:"
config GPIO_ARIZONA
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index a274d7df3c8c..6aab73d577d1 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_ARCH_DAVINCI) += gpio-davinci.o
obj-$(CONFIG_GPIO_EM) += gpio-em.o
obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o
obj-$(CONFIG_GPIO_GE_FPGA) += gpio-ge.o
+obj-$(CONFIG_GPIO_GRGPIO) += gpio-grgpio.o
obj-$(CONFIG_GPIO_ICH) += gpio-ich.o
obj-$(CONFIG_GPIO_IT8761E) += gpio-it8761e.o
obj-$(CONFIG_GPIO_JANZ_TTL) += gpio-janz-ttl.o
diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index 464be961f605..721607904d0a 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -137,7 +137,7 @@ static int gen_74x164_probe(struct spi_device *spi)
mutex_init(&chip->lock);
- dev_set_drvdata(&spi->dev, chip);
+ spi_set_drvdata(spi, chip);
chip->spi = spi;
@@ -176,7 +176,7 @@ static int gen_74x164_probe(struct spi_device *spi)
return ret;
exit_destroy:
- dev_set_drvdata(&spi->dev, NULL);
+ spi_set_drvdata(spi, NULL);
mutex_destroy(&chip->lock);
return ret;
}
@@ -186,11 +186,11 @@ static int gen_74x164_remove(struct spi_device *spi)
struct gen_74x164_chip *chip;
int ret;
- chip = dev_get_drvdata(&spi->dev);
+ chip = spi_get_drvdata(spi);
if (chip == NULL)
return -ENODEV;
- dev_set_drvdata(&spi->dev, NULL);
+ spi_set_drvdata(spi, NULL);
ret = gpiochip_remove(&chip->gpio_chip);
if (!ret)
diff --git a/drivers/gpio/gpio-adp5520.c b/drivers/gpio/gpio-adp5520.c
index 8afa95f831b1..f33f78dcadaa 100644
--- a/drivers/gpio/gpio-adp5520.c
+++ b/drivers/gpio/gpio-adp5520.c
@@ -105,7 +105,7 @@ static int adp5520_gpio_probe(struct platform_device *pdev)
return -ENODEV;
}
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
dev_err(&pdev->dev, "failed to alloc memory\n");
return -ENOMEM;
@@ -163,7 +163,6 @@ static int adp5520_gpio_probe(struct platform_device *pdev)
return 0;
err:
- kfree(dev);
return ret;
}
@@ -180,7 +179,6 @@ static int adp5520_gpio_remove(struct platform_device *pdev)
return ret;
}
- kfree(dev);
return 0;
}
diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c
index deca78f99316..5cba855638bf 100644
--- a/drivers/gpio/gpio-em.c
+++ b/drivers/gpio/gpio-em.c
@@ -231,10 +231,12 @@ static int em_gio_irq_domain_map(struct irq_domain *h, unsigned int virq,
static struct irq_domain_ops em_gio_irq_domain_ops = {
.map = em_gio_irq_domain_map,
+ .xlate = irq_domain_xlate_twocell,
};
static int em_gio_probe(struct platform_device *pdev)
{
+ struct gpio_em_config pdata_dt;
struct gpio_em_config *pdata = pdev->dev.platform_data;
struct em_gio_priv *p;
struct resource *io[2], *irq[2];
@@ -243,7 +245,7 @@ static int em_gio_probe(struct platform_device *pdev)
const char *name = dev_name(&pdev->dev);
int ret;
- p = kzalloc(sizeof(*p), GFP_KERNEL);
+ p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
if (!p) {
dev_err(&pdev->dev, "failed to allocate driver data\n");
ret = -ENOMEM;
@@ -259,24 +261,45 @@ static int em_gio_probe(struct platform_device *pdev)
irq[0] = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
irq[1] = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
- if (!io[0] || !io[1] || !irq[0] || !irq[1] || !pdata) {
- dev_err(&pdev->dev, "missing IRQ, IOMEM or configuration\n");
+ if (!io[0] || !io[1] || !irq[0] || !irq[1]) {
+ dev_err(&pdev->dev, "missing IRQ or IOMEM\n");
ret = -EINVAL;
- goto err1;
+ goto err0;
}
- p->base0 = ioremap_nocache(io[0]->start, resource_size(io[0]));
+ p->base0 = devm_ioremap_nocache(&pdev->dev, io[0]->start,
+ resource_size(io[0]));
if (!p->base0) {
dev_err(&pdev->dev, "failed to remap low I/O memory\n");
ret = -ENXIO;
- goto err1;
+ goto err0;
}
- p->base1 = ioremap_nocache(io[1]->start, resource_size(io[1]));
+ p->base1 = devm_ioremap_nocache(&pdev->dev, io[1]->start,
+ resource_size(io[1]));
if (!p->base1) {
dev_err(&pdev->dev, "failed to remap high I/O memory\n");
ret = -ENXIO;
- goto err2;
+ goto err0;
+ }
+
+ if (!pdata) {
+ memset(&pdata_dt, 0, sizeof(pdata_dt));
+ pdata = &pdata_dt;
+
+ if (of_property_read_u32(pdev->dev.of_node, "ngpios",
+ &pdata->number_of_pins)) {
+ dev_err(&pdev->dev, "Missing ngpios OF property\n");
+ ret = -EINVAL;
+ goto err0;
+ }
+
+ ret = of_alias_get_id(pdev->dev.of_node, "gpio");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Couldn't get OF id\n");
+ goto err0;
+ }
+ pdata->gpio_base = ret * 32; /* 32 GPIOs per instance */
}
gpio_chip = &p->gpio_chip;
@@ -306,40 +329,32 @@ static int em_gio_probe(struct platform_device *pdev)
if (!p->irq_domain) {
ret = -ENXIO;
dev_err(&pdev->dev, "cannot initialize irq domain\n");
- goto err3;
+ goto err0;
}
- if (request_irq(irq[0]->start, em_gio_irq_handler, 0, name, p)) {
+ if (devm_request_irq(&pdev->dev, irq[0]->start,
+ em_gio_irq_handler, 0, name, p)) {
dev_err(&pdev->dev, "failed to request low IRQ\n");
ret = -ENOENT;
- goto err4;
+ goto err1;
}
- if (request_irq(irq[1]->start, em_gio_irq_handler, 0, name, p)) {
+ if (devm_request_irq(&pdev->dev, irq[1]->start,
+ em_gio_irq_handler, 0, name, p)) {
dev_err(&pdev->dev, "failed to request high IRQ\n");
ret = -ENOENT;
- goto err5;
+ goto err1;
}
ret = gpiochip_add(gpio_chip);
if (ret) {
dev_err(&pdev->dev, "failed to add GPIO controller\n");
- goto err6;
+ goto err1;
}
return 0;
-err6:
- free_irq(irq[1]->start, pdev);
-err5:
- free_irq(irq[0]->start, pdev);
-err4:
- irq_domain_remove(p->irq_domain);
-err3:
- iounmap(p->base1);
-err2:
- iounmap(p->base0);
err1:
- kfree(p);
+ irq_domain_remove(p->irq_domain);
err0:
return ret;
}
@@ -347,34 +362,43 @@ err0:
static int em_gio_remove(struct platform_device *pdev)
{
struct em_gio_priv *p = platform_get_drvdata(pdev);
- struct resource *irq[2];
int ret;
ret = gpiochip_remove(&p->gpio_chip);
if (ret)
return ret;
- irq[0] = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- irq[1] = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
-
- free_irq(irq[1]->start, pdev);
- free_irq(irq[0]->start, pdev);
irq_domain_remove(p->irq_domain);
- iounmap(p->base1);
- iounmap(p->base0);
- kfree(p);
return 0;
}
+static const struct of_device_id em_gio_dt_ids[] = {
+ { .compatible = "renesas,em-gio", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, em_gio_dt_ids);
+
static struct platform_driver em_gio_device_driver = {
.probe = em_gio_probe,
.remove = em_gio_remove,
.driver = {
.name = "em_gio",
+ .of_match_table = em_gio_dt_ids,
+ .owner = THIS_MODULE,
}
};
-module_platform_driver(em_gio_device_driver);
+static int __init em_gio_init(void)
+{
+ return platform_driver_register(&em_gio_device_driver);
+}
+postcore_initcall(em_gio_init);
+
+static void __exit em_gio_exit(void)
+{
+ platform_driver_unregister(&em_gio_device_driver);
+}
+module_exit(em_gio_exit);
MODULE_AUTHOR("Magnus Damm");
MODULE_DESCRIPTION("Renesas Emma Mobile GIO Driver");
diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index 05fcc0f247ca..d2196bf73847 100644
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -104,6 +104,26 @@ static unsigned long bgpio_read64(void __iomem *reg)
}
#endif /* BITS_PER_LONG >= 64 */
+static void bgpio_write16be(void __iomem *reg, unsigned long data)
+{
+ iowrite16be(data, reg);
+}
+
+static unsigned long bgpio_read16be(void __iomem *reg)
+{
+ return ioread16be(reg);
+}
+
+static void bgpio_write32be(void __iomem *reg, unsigned long data)
+{
+ iowrite32be(data, reg);
+}
+
+static unsigned long bgpio_read32be(void __iomem *reg)
+{
+ return ioread32be(reg);
+}
+
static unsigned long bgpio_pin2mask(struct bgpio_chip *bgc, unsigned int pin)
{
return 1 << pin;
@@ -249,7 +269,8 @@ static int bgpio_dir_out_inv(struct gpio_chip *gc, unsigned int gpio, int val)
static int bgpio_setup_accessors(struct device *dev,
struct bgpio_chip *bgc,
- bool be)
+ bool bit_be,
+ bool byte_be)
{
switch (bgc->bits) {
@@ -258,17 +279,33 @@ static int bgpio_setup_accessors(struct device *dev,
bgc->write_reg = bgpio_write8;
break;
case 16:
- bgc->read_reg = bgpio_read16;
- bgc->write_reg = bgpio_write16;
+ if (byte_be) {
+ bgc->read_reg = bgpio_read16be;
+ bgc->write_reg = bgpio_write16be;
+ } else {
+ bgc->read_reg = bgpio_read16;
+ bgc->write_reg = bgpio_write16;
+ }
break;
case 32:
- bgc->read_reg = bgpio_read32;
- bgc->write_reg = bgpio_write32;
+ if (byte_be) {
+ bgc->read_reg = bgpio_read32be;
+ bgc->write_reg = bgpio_write32be;
+ } else {
+ bgc->read_reg = bgpio_read32;
+ bgc->write_reg = bgpio_write32;
+ }
break;
#if BITS_PER_LONG >= 64
case 64:
- bgc->read_reg = bgpio_read64;
- bgc->write_reg = bgpio_write64;
+ if (byte_be) {
+ dev_err(dev,
+ "64 bit big endian byte order unsupported\n");
+ return -EINVAL;
+ } else {
+ bgc->read_reg = bgpio_read64;
+ bgc->write_reg = bgpio_write64;
+ }
break;
#endif /* BITS_PER_LONG >= 64 */
default:
@@ -276,7 +313,7 @@ static int bgpio_setup_accessors(struct device *dev,
return -EINVAL;
}
- bgc->pin2mask = be ? bgpio_pin2mask_be : bgpio_pin2mask;
+ bgc->pin2mask = bit_be ? bgpio_pin2mask_be : bgpio_pin2mask;
return 0;
}
@@ -353,11 +390,7 @@ static int bgpio_setup_direction(struct bgpio_chip *bgc,
int bgpio_remove(struct bgpio_chip *bgc)
{
- int err = gpiochip_remove(&bgc->gc);
-
- kfree(bgc);
-
- return err;
+ return gpiochip_remove(&bgc->gc);
}
EXPORT_SYMBOL_GPL(bgpio_remove);
@@ -385,7 +418,8 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
if (ret)
return ret;
- ret = bgpio_setup_accessors(dev, bgc, flags & BGPIOF_BIG_ENDIAN);
+ ret = bgpio_setup_accessors(dev, bgc, flags & BGPIOF_BIG_ENDIAN,
+ flags & BGPIOF_BIG_ENDIAN_BYTE_ORDER);
if (ret)
return ret;
diff --git a/drivers/gpio/gpio-grgpio.c b/drivers/gpio/gpio-grgpio.c
new file mode 100644
index 000000000000..8e08b8647655
--- /dev/null
+++ b/drivers/gpio/gpio-grgpio.c
@@ -0,0 +1,505 @@
+/*
+ * Driver for Aeroflex Gaisler GRGPIO General Purpose I/O cores.
+ *
+ * 2013 (c) Aeroflex Gaisler AB
+ *
+ * This driver supports the GRGPIO GPIO core available in the GRLIB VHDL
+ * IP core library.
+ *
+ * Full documentation of the GRGPIO core can be found here:
+ * http://www.gaisler.com/products/grlib/grip.pdf
+ *
+ * See "Documentation/devicetree/bindings/gpio/gpio-grgpio.txt" for
+ * information on open firmware properties.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Contributors: Andreas Larsson <andreas@gaisler.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/of_platform.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/basic_mmio_gpio.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+
+#define GRGPIO_MAX_NGPIO 32
+
+#define GRGPIO_DATA 0x00
+#define GRGPIO_OUTPUT 0x04
+#define GRGPIO_DIR 0x08
+#define GRGPIO_IMASK 0x0c
+#define GRGPIO_IPOL 0x10
+#define GRGPIO_IEDGE 0x14
+#define GRGPIO_BYPASS 0x18
+#define GRGPIO_IMAP_BASE 0x20
+
+/* Structure for an irq of the core - called an underlying irq */
+struct grgpio_uirq {
+ u8 refcnt; /* Reference counter to manage requesting/freeing of uirq */
+ u8 uirq; /* Underlying irq of the gpio driver */
+};
+
+/*
+ * Structure for an irq of a gpio line handed out by this driver. The index is
+ * used to map to the corresponding underlying irq.
+ */
+struct grgpio_lirq {
+ s8 index; /* Index into struct grgpio_priv's uirqs, or -1 */
+ u8 irq; /* irq for the gpio line */
+};
+
+struct grgpio_priv {
+ struct bgpio_chip bgc;
+ void __iomem *regs;
+ struct device *dev;
+
+ u32 imask; /* irq mask shadow register */
+
+ /*
+ * The grgpio core can have multiple "underlying" irqs. The gpio lines
+ * can be mapped to any one or none of these underlying irqs
+ * independently of each other. This driver sets up an irq domain and
+ * hands out separate irqs to each gpio line
+ */
+ struct irq_domain *domain;
+
+ /*
+ * This array contains information on each underlying irq, each
+ * irq of the grgpio core itself.
+ */
+ struct grgpio_uirq uirqs[GRGPIO_MAX_NGPIO];
+
+ /*
+ * This array contains information for each gpio line on the irqs
+ * obtains from this driver. An index value of -1 for a certain gpio
+ * line indicates that the line has no irq. Otherwise the index connects
+ * the irq to the underlying irq by pointing into the uirqs array.
+ */
+ struct grgpio_lirq lirqs[GRGPIO_MAX_NGPIO];
+};
+
+static inline struct grgpio_priv *grgpio_gc_to_priv(struct gpio_chip *gc)
+{
+ struct bgpio_chip *bgc = to_bgpio_chip(gc);
+
+ return container_of(bgc, struct grgpio_priv, bgc);
+}
+
+static void grgpio_set_imask(struct grgpio_priv *priv, unsigned int offset,
+ int val)
+{
+ struct bgpio_chip *bgc = &priv->bgc;
+ unsigned long mask = bgc->pin2mask(bgc, offset);
+ unsigned long flags;
+
+ spin_lock_irqsave(&bgc->lock, flags);
+
+ if (val)
+ priv->imask |= mask;
+ else
+ priv->imask &= ~mask;
+ bgc->write_reg(priv->regs + GRGPIO_IMASK, priv->imask);
+
+ spin_unlock_irqrestore(&bgc->lock, flags);
+}
+
+static int grgpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+ struct grgpio_priv *priv = grgpio_gc_to_priv(gc);
+
+ if (offset > gc->ngpio)
+ return -ENXIO;
+
+ if (priv->lirqs[offset].index < 0)
+ return -ENXIO;
+
+ return irq_create_mapping(priv->domain, offset);
+}
+
+/* -------------------- IRQ chip functions -------------------- */
+
+static int grgpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ struct grgpio_priv *priv = irq_data_get_irq_chip_data(d);
+ unsigned long flags;
+ u32 mask = BIT(d->hwirq);
+ u32 ipol;
+ u32 iedge;
+ u32 pol;
+ u32 edge;
+
+ switch (type) {
+ case IRQ_TYPE_LEVEL_LOW:
+ pol = 0;
+ edge = 0;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ pol = mask;
+ edge = 0;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ pol = 0;
+ edge = mask;
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ pol = mask;
+ edge = mask;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&priv->bgc.lock, flags);
+
+ ipol = priv->bgc.read_reg(priv->regs + GRGPIO_IPOL) & ~mask;
+ iedge = priv->bgc.read_reg(priv->regs + GRGPIO_IEDGE) & ~mask;
+
+ priv->bgc.write_reg(priv->regs + GRGPIO_IPOL, ipol | pol);
+ priv->bgc.write_reg(priv->regs + GRGPIO_IEDGE, iedge | edge);
+
+ spin_unlock_irqrestore(&priv->bgc.lock, flags);
+
+ return 0;
+}
+
+static void grgpio_irq_mask(struct irq_data *d)
+{
+ struct grgpio_priv *priv = irq_data_get_irq_chip_data(d);
+ int offset = d->hwirq;
+
+ grgpio_set_imask(priv, offset, 0);
+}
+
+static void grgpio_irq_unmask(struct irq_data *d)
+{
+ struct grgpio_priv *priv = irq_data_get_irq_chip_data(d);
+ int offset = d->hwirq;
+
+ grgpio_set_imask(priv, offset, 1);
+}
+
+static struct irq_chip grgpio_irq_chip = {
+ .name = "grgpio",
+ .irq_mask = grgpio_irq_mask,
+ .irq_unmask = grgpio_irq_unmask,
+ .irq_set_type = grgpio_irq_set_type,
+};
+
+static irqreturn_t grgpio_irq_handler(int irq, void *dev)
+{
+ struct grgpio_priv *priv = dev;
+ int ngpio = priv->bgc.gc.ngpio;
+ unsigned long flags;
+ int i;
+ int match = 0;
+
+ spin_lock_irqsave(&priv->bgc.lock, flags);
+
+ /*
+ * For each gpio line, call its interrupt handler if it its underlying
+ * irq matches the current irq that is handled.
+ */
+ for (i = 0; i < ngpio; i++) {
+ struct grgpio_lirq *lirq = &priv->lirqs[i];
+
+ if (priv->imask & BIT(i) && lirq->index >= 0 &&
+ priv->uirqs[lirq->index].uirq == irq) {
+ generic_handle_irq(lirq->irq);
+ match = 1;
+ }
+ }
+
+ spin_unlock_irqrestore(&priv->bgc.lock, flags);
+
+ if (!match)
+ dev_warn(priv->dev, "No gpio line matched irq %d\n", irq);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * This function will be called as a consequence of the call to
+ * irq_create_mapping in grgpio_to_irq
+ */
+int grgpio_irq_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ struct grgpio_priv *priv = d->host_data;
+ struct grgpio_lirq *lirq;
+ struct grgpio_uirq *uirq;
+ unsigned long flags;
+ int offset = hwirq;
+ int ret = 0;
+
+ if (!priv)
+ return -EINVAL;
+
+ lirq = &priv->lirqs[offset];
+ if (lirq->index < 0)
+ return -EINVAL;
+
+ dev_dbg(priv->dev, "Mapping irq %d for gpio line %d\n",
+ irq, offset);
+
+ spin_lock_irqsave(&priv->bgc.lock, flags);
+
+ /* Request underlying irq if not already requested */
+ lirq->irq = irq;
+ uirq = &priv->uirqs[lirq->index];
+ if (uirq->refcnt == 0) {
+ ret = request_irq(uirq->uirq, grgpio_irq_handler, 0,
+ dev_name(priv->dev), priv);
+ if (ret) {
+ dev_err(priv->dev,
+ "Could not request underlying irq %d\n",
+ uirq->uirq);
+
+ spin_unlock_irqrestore(&priv->bgc.lock, flags);
+
+ return ret;
+ }
+ }
+ uirq->refcnt++;
+
+ spin_unlock_irqrestore(&priv->bgc.lock, flags);
+
+ /* Setup irq */
+ irq_set_chip_data(irq, priv);
+ irq_set_chip_and_handler(irq, &grgpio_irq_chip,
+ handle_simple_irq);
+ irq_clear_status_flags(irq, IRQ_NOREQUEST);
+#ifdef CONFIG_ARM
+ set_irq_flags(irq, IRQF_VALID);
+#else
+ irq_set_noprobe(irq);
+#endif
+
+ return ret;
+}
+
+void grgpio_irq_unmap(struct irq_domain *d, unsigned int irq)
+{
+ struct grgpio_priv *priv = d->host_data;
+ int index;
+ struct grgpio_lirq *lirq;
+ struct grgpio_uirq *uirq;
+ unsigned long flags;
+ int ngpio = priv->bgc.gc.ngpio;
+ int i;
+
+#ifdef CONFIG_ARM
+ set_irq_flags(irq, 0);
+#endif
+ irq_set_chip_and_handler(irq, NULL, NULL);
+ irq_set_chip_data(irq, NULL);
+
+ spin_lock_irqsave(&priv->bgc.lock, flags);
+
+ /* Free underlying irq if last user unmapped */
+ index = -1;
+ for (i = 0; i < ngpio; i++) {
+ lirq = &priv->lirqs[i];
+ if (lirq->irq == irq) {
+ grgpio_set_imask(priv, i, 0);
+ lirq->irq = 0;
+ index = lirq->index;
+ break;
+ }
+ }
+ WARN_ON(index < 0);
+
+ if (index >= 0) {
+ uirq = &priv->uirqs[lirq->index];
+ uirq->refcnt--;
+ if (uirq->refcnt == 0)
+ free_irq(uirq->uirq, priv);
+ }
+
+ spin_unlock_irqrestore(&priv->bgc.lock, flags);
+}
+
+static struct irq_domain_ops grgpio_irq_domain_ops = {
+ .map = grgpio_irq_map,
+ .unmap = grgpio_irq_unmap,
+};
+
+/* ------------------------------------------------------------ */
+
+static int grgpio_probe(struct platform_device *ofdev)
+{
+ struct device_node *np = ofdev->dev.of_node;
+ void __iomem *regs;
+ struct gpio_chip *gc;
+ struct bgpio_chip *bgc;
+ struct grgpio_priv *priv;
+ struct resource *res;
+ int err;
+ u32 prop;
+ s32 *irqmap;
+ int size;
+ int i;
+
+ priv = devm_kzalloc(&ofdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ res = platform_get_resource(ofdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(&ofdev->dev, res);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ bgc = &priv->bgc;
+ err = bgpio_init(bgc, &ofdev->dev, 4, regs + GRGPIO_DATA,
+ regs + GRGPIO_OUTPUT, NULL, regs + GRGPIO_DIR, NULL,
+ BGPIOF_BIG_ENDIAN_BYTE_ORDER);
+ if (err) {
+ dev_err(&ofdev->dev, "bgpio_init() failed\n");
+ return err;
+ }
+
+ priv->regs = regs;
+ priv->imask = bgc->read_reg(regs + GRGPIO_IMASK);
+ priv->dev = &ofdev->dev;
+
+ gc = &bgc->gc;
+ gc->of_node = np;
+ gc->owner = THIS_MODULE;
+ gc->to_irq = grgpio_to_irq;
+ gc->label = np->full_name;
+ gc->base = -1;
+
+ err = of_property_read_u32(np, "nbits", &prop);
+ if (err || prop <= 0 || prop > GRGPIO_MAX_NGPIO) {
+ gc->ngpio = GRGPIO_MAX_NGPIO;
+ dev_dbg(&ofdev->dev,
+ "No or invalid nbits property: assume %d\n", gc->ngpio);
+ } else {
+ gc->ngpio = prop;
+ }
+
+ /*
+ * The irqmap contains the index values indicating which underlying irq,
+ * if anyone, is connected to that line
+ */
+ irqmap = (s32 *)of_get_property(np, "irqmap", &size);
+ if (irqmap) {
+ if (size < gc->ngpio) {
+ dev_err(&ofdev->dev,
+ "irqmap shorter than ngpio (%d < %d)\n",
+ size, gc->ngpio);
+ return -EINVAL;
+ }
+
+ priv->domain = irq_domain_add_linear(np, gc->ngpio,
+ &grgpio_irq_domain_ops,
+ priv);
+ if (!priv->domain) {
+ dev_err(&ofdev->dev, "Could not add irq domain\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < gc->ngpio; i++) {
+ struct grgpio_lirq *lirq;
+ int ret;
+
+ lirq = &priv->lirqs[i];
+ lirq->index = irqmap[i];
+
+ if (lirq->index < 0)
+ continue;
+
+ ret = platform_get_irq(ofdev, lirq->index);
+ if (ret <= 0) {
+ /*
+ * Continue without irq functionality for that
+ * gpio line
+ */
+ dev_err(priv->dev,
+ "Failed to get irq for offset %d\n", i);
+ continue;
+ }
+ priv->uirqs[lirq->index].uirq = ret;
+ }
+ }
+
+ platform_set_drvdata(ofdev, priv);
+
+ err = gpiochip_add(gc);
+ if (err) {
+ dev_err(&ofdev->dev, "Could not add gpiochip\n");
+ return err;
+ }
+
+ dev_info(&ofdev->dev, "regs=0x%p, base=%d, ngpio=%d, irqs=%s\n",
+ priv->regs, gc->base, gc->ngpio, priv->domain ? "on" : "off");
+
+ return 0;
+}
+
+static int grgpio_remove(struct platform_device *ofdev)
+{
+ struct grgpio_priv *priv = platform_get_drvdata(ofdev);
+ unsigned long flags;
+ int i;
+ int ret = 0;
+
+ spin_lock_irqsave(&priv->bgc.lock, flags);
+
+ if (priv->domain) {
+ for (i = 0; i < GRGPIO_MAX_NGPIO; i++) {
+ if (priv->uirqs[i].refcnt != 0) {
+ ret = -EBUSY;
+ goto out;
+ }
+ }
+ }
+
+ ret = gpiochip_remove(&priv->bgc.gc);
+ if (ret)
+ goto out;
+
+ if (priv->domain)
+ irq_domain_remove(priv->domain);
+
+out:
+ spin_unlock_irqrestore(&priv->bgc.lock, flags);
+
+ return ret;
+}
+
+static struct of_device_id grgpio_match[] = {
+ {.name = "GAISLER_GPIO"},
+ {.name = "01_01a"},
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, grgpio_match);
+
+static struct platform_driver grgpio_driver = {
+ .driver = {
+ .name = "grgpio",
+ .owner = THIS_MODULE,
+ .of_match_table = grgpio_match,
+ },
+ .probe = grgpio_probe,
+ .remove = grgpio_remove,
+};
+module_platform_driver(grgpio_driver);
+
+MODULE_AUTHOR("Aeroflex Gaisler AB.");
+MODULE_DESCRIPTION("Driver for Aeroflex Gaisler GRGPIO");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index de3c317bd3e2..e16d932fd444 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -130,14 +130,11 @@ static int ichx_read_bit(int reg, unsigned nr)
static bool ichx_gpio_check_available(struct gpio_chip *gpio, unsigned nr)
{
- return ichx_priv.use_gpio & (1 << (nr / 32));
+ return !!(ichx_priv.use_gpio & (1 << (nr / 32)));
}
static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
{
- if (!ichx_gpio_check_available(gpio, nr))
- return -ENXIO;
-
/*
* Try setting pin as an input and verify it worked since many pins
* are output-only.
@@ -151,9 +148,6 @@ static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
int val)
{
- if (!ichx_gpio_check_available(gpio, nr))
- return -ENXIO;
-
/* Set GPIO output value. */
ichx_write_bit(GPIO_LVL, nr, val, 0);
@@ -169,9 +163,6 @@ static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
static int ichx_gpio_get(struct gpio_chip *chip, unsigned nr)
{
- if (!ichx_gpio_check_available(chip, nr))
- return -ENXIO;
-
return ichx_read_bit(GPIO_LVL, nr);
}
@@ -180,9 +171,6 @@ static int ich6_gpio_get(struct gpio_chip *chip, unsigned nr)
unsigned long flags;
u32 data;
- if (!ichx_gpio_check_available(chip, nr))
- return -ENXIO;
-
/*
* GPI 0 - 15 need to be read from the power management registers on
* a ICH6/3100 bridge.
@@ -207,6 +195,9 @@ static int ich6_gpio_get(struct gpio_chip *chip, unsigned nr)
static int ichx_gpio_request(struct gpio_chip *chip, unsigned nr)
{
+ if (!ichx_gpio_check_available(chip, nr))
+ return -ENXIO;
+
/*
* Note we assume the BIOS properly set a bridge's USE value. Some
* chips (eg Intel 3100) have bogus USE values though, so first see if
diff --git a/drivers/gpio/gpio-lpc32xx.c b/drivers/gpio/gpio-lpc32xx.c
index 36d7dee07b28..dda6a756a3d9 100644
--- a/drivers/gpio/gpio-lpc32xx.c
+++ b/drivers/gpio/gpio-lpc32xx.c
@@ -533,7 +533,7 @@ static int lpc32xx_of_xlate(struct gpio_chip *gc,
{
/* Is this the correct bank? */
u32 bank = gpiospec->args[0];
- if ((bank > ARRAY_SIZE(lpc32xx_gpiochip) ||
+ if ((bank >= ARRAY_SIZE(lpc32xx_gpiochip) ||
(gc != &lpc32xx_gpiochip[bank].chip)))
return -EINVAL;
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c
index 3472b05ac512..86c17de87692 100644
--- a/drivers/gpio/gpio-lynxpoint.c
+++ b/drivers/gpio/gpio-lynxpoint.c
@@ -32,6 +32,7 @@
#include <linux/acpi.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
+#include <linux/io.h>
/* LynxPoint chipset has support for 94 gpio pins */
diff --git a/drivers/gpio/gpio-max7300.c b/drivers/gpio/gpio-max7300.c
index 4b6b9a04e326..40ab6dfb6021 100644
--- a/drivers/gpio/gpio-max7300.c
+++ b/drivers/gpio/gpio-max7300.c
@@ -41,7 +41,7 @@ static int max7300_probe(struct i2c_client *client,
I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
- ts = kzalloc(sizeof(struct max7301), GFP_KERNEL);
+ ts = devm_kzalloc(&client->dev, sizeof(struct max7301), GFP_KERNEL);
if (!ts)
return -ENOMEM;
@@ -50,8 +50,6 @@ static int max7300_probe(struct i2c_client *client,
ts->dev = &client->dev;
ret = __max730x_probe(ts);
- if (ret)
- kfree(ts);
return ret;
}
diff --git a/drivers/gpio/gpio-max7301.c b/drivers/gpio/gpio-max7301.c
index c6c535c1310e..3b16ab701630 100644
--- a/drivers/gpio/gpio-max7301.c
+++ b/drivers/gpio/gpio-max7301.c
@@ -56,12 +56,13 @@ static int max7301_probe(struct spi_device *spi)
int ret;
/* bits_per_word cannot be configured in platform data */
- spi->bits_per_word = 16;
+ if (spi->dev.platform_data)
+ spi->bits_per_word = 16;
ret = spi_setup(spi);
if (ret < 0)
return ret;
- ts = kzalloc(sizeof(struct max7301), GFP_KERNEL);
+ ts = devm_kzalloc(&spi->dev, sizeof(struct max7301), GFP_KERNEL);
if (!ts)
return -ENOMEM;
@@ -70,8 +71,6 @@ static int max7301_probe(struct spi_device *spi)
ts->dev = &spi->dev;
ret = __max730x_probe(ts);
- if (ret)
- kfree(ts);
return ret;
}
diff --git a/drivers/gpio/gpio-max732x.c b/drivers/gpio/gpio-max732x.c
index 1e0467ce4c37..d4b51b163b03 100644
--- a/drivers/gpio/gpio-max732x.c
+++ b/drivers/gpio/gpio-max732x.c
@@ -589,7 +589,8 @@ static int max732x_probe(struct i2c_client *client,
return -EINVAL;
}
- chip = kzalloc(sizeof(struct max732x_chip), GFP_KERNEL);
+ chip = devm_kzalloc(&client->dev, sizeof(struct max732x_chip),
+ GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
chip->client = client;
@@ -647,7 +648,6 @@ static int max732x_probe(struct i2c_client *client,
out_failed:
max732x_irq_teardown(chip);
- kfree(chip);
return ret;
}
@@ -680,7 +680,6 @@ static int max732x_remove(struct i2c_client *client)
if (chip->client_dummy)
i2c_unregister_device(chip->client_dummy);
- kfree(chip);
return 0;
}
diff --git a/drivers/gpio/gpio-mc33880.c b/drivers/gpio/gpio-mc33880.c
index 6a8fdc26ae6a..63a7a1bfb2d9 100644
--- a/drivers/gpio/gpio-mc33880.c
+++ b/drivers/gpio/gpio-mc33880.c
@@ -101,13 +101,13 @@ static int mc33880_probe(struct spi_device *spi)
if (ret < 0)
return ret;
- mc = kzalloc(sizeof(struct mc33880), GFP_KERNEL);
+ mc = devm_kzalloc(&spi->dev, sizeof(struct mc33880), GFP_KERNEL);
if (!mc)
return -ENOMEM;
mutex_init(&mc->lock);
- dev_set_drvdata(&spi->dev, mc);
+ spi_set_drvdata(spi, mc);
mc->spi = spi;
@@ -130,7 +130,8 @@ static int mc33880_probe(struct spi_device *spi)
ret = mc33880_write_config(mc);
if (ret) {
- printk(KERN_ERR "Failed writing to " DRIVER_NAME ": %d\n", ret);
+ dev_err(&spi->dev, "Failed writing to " DRIVER_NAME ": %d\n",
+ ret);
goto exit_destroy;
}
@@ -141,9 +142,8 @@ static int mc33880_probe(struct spi_device *spi)
return ret;
exit_destroy:
- dev_set_drvdata(&spi->dev, NULL);
+ spi_set_drvdata(spi, NULL);
mutex_destroy(&mc->lock);
- kfree(mc);
return ret;
}
@@ -152,17 +152,16 @@ static int mc33880_remove(struct spi_device *spi)
struct mc33880 *mc;
int ret;
- mc = dev_get_drvdata(&spi->dev);
+ mc = spi_get_drvdata(spi);
if (mc == NULL)
return -ENODEV;
- dev_set_drvdata(&spi->dev, NULL);
+ spi_set_drvdata(spi, NULL);
ret = gpiochip_remove(&mc->chip);
- if (!ret) {
+ if (!ret)
mutex_destroy(&mc->lock);
- kfree(mc);
- } else
+ else
dev_err(&spi->dev, "Failed to remove the GPIO controller: %d\n",
ret);
diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
index 3cea0ea79e80..6a4470b84488 100644
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -12,6 +12,8 @@
#include <linux/spi/mcp23s08.h>
#include <linux/slab.h>
#include <asm/byteorder.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
/**
* MCP types supported by driver
@@ -383,6 +385,10 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
mcp->chip.direction_output = mcp23s08_direction_output;
mcp->chip.set = mcp23s08_set;
mcp->chip.dbg_show = mcp23s08_dbg_show;
+#ifdef CONFIG_OF
+ mcp->chip.of_gpio_n_cells = 2;
+ mcp->chip.of_node = dev->of_node;
+#endif
switch (type) {
#ifdef CONFIG_SPI_MASTER
@@ -473,6 +479,35 @@ fail:
/*----------------------------------------------------------------------*/
+#ifdef CONFIG_OF
+#ifdef CONFIG_SPI_MASTER
+static struct of_device_id mcp23s08_spi_of_match[] = {
+ {
+ .compatible = "mcp,mcp23s08", .data = (void *) MCP_TYPE_S08,
+ },
+ {
+ .compatible = "mcp,mcp23s17", .data = (void *) MCP_TYPE_S17,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, mcp23s08_spi_of_match);
+#endif
+
+#if IS_ENABLED(CONFIG_I2C)
+static struct of_device_id mcp23s08_i2c_of_match[] = {
+ {
+ .compatible = "mcp,mcp23008", .data = (void *) MCP_TYPE_008,
+ },
+ {
+ .compatible = "mcp,mcp23017", .data = (void *) MCP_TYPE_017,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, mcp23s08_i2c_of_match);
+#endif
+#endif /* CONFIG_OF */
+
+
#if IS_ENABLED(CONFIG_I2C)
static int mcp230xx_probe(struct i2c_client *client,
@@ -480,12 +515,23 @@ static int mcp230xx_probe(struct i2c_client *client,
{
struct mcp23s08_platform_data *pdata;
struct mcp23s08 *mcp;
- int status;
-
- pdata = client->dev.platform_data;
- if (!pdata || !gpio_is_valid(pdata->base)) {
- dev_dbg(&client->dev, "invalid or missing platform data\n");
- return -EINVAL;
+ int status, base, pullups;
+ const struct of_device_id *match;
+
+ match = of_match_device(of_match_ptr(mcp23s08_i2c_of_match),
+ &client->dev);
+ if (match) {
+ base = -1;
+ pullups = 0;
+ } else {
+ pdata = client->dev.platform_data;
+ if (!pdata || !gpio_is_valid(pdata->base)) {
+ dev_dbg(&client->dev,
+ "invalid or missing platform data\n");
+ return -EINVAL;
+ }
+ base = pdata->base;
+ pullups = pdata->chip[0].pullups;
}
mcp = kzalloc(sizeof *mcp, GFP_KERNEL);
@@ -493,8 +539,7 @@ static int mcp230xx_probe(struct i2c_client *client,
return -ENOMEM;
status = mcp23s08_probe_one(mcp, &client->dev, client, client->addr,
- id->driver_data, pdata->base,
- pdata->chip[0].pullups);
+ id->driver_data, base, pullups);
if (status)
goto fail;
@@ -531,6 +576,7 @@ static struct i2c_driver mcp230xx_driver = {
.driver = {
.name = "mcp230xx",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(mcp23s08_i2c_of_match),
},
.probe = mcp230xx_probe,
.remove = mcp230xx_remove,
@@ -565,28 +611,55 @@ static int mcp23s08_probe(struct spi_device *spi)
unsigned chips = 0;
struct mcp23s08_driver_data *data;
int status, type;
- unsigned base;
-
- type = spi_get_device_id(spi)->driver_data;
-
- pdata = spi->dev.platform_data;
- if (!pdata || !gpio_is_valid(pdata->base)) {
- dev_dbg(&spi->dev, "invalid or missing platform data\n");
- return -EINVAL;
- }
+ unsigned base = -1,
+ ngpio = 0,
+ pullups[ARRAY_SIZE(pdata->chip)];
+ const struct of_device_id *match;
+ u32 spi_present_mask = 0;
+
+ match = of_match_device(of_match_ptr(mcp23s08_spi_of_match), &spi->dev);
+ if (match) {
+ type = (int)match->data;
+ status = of_property_read_u32(spi->dev.of_node,
+ "mcp,spi-present-mask", &spi_present_mask);
+ if (status) {
+ dev_err(&spi->dev, "DT has no spi-present-mask\n");
+ return -ENODEV;
+ }
+ if ((spi_present_mask <= 0) || (spi_present_mask >= 256)) {
+ dev_err(&spi->dev, "invalid spi-present-mask\n");
+ return -ENODEV;
+ }
- for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {
- if (!pdata->chip[addr].is_present)
- continue;
- chips++;
- if ((type == MCP_TYPE_S08) && (addr > 3)) {
- dev_err(&spi->dev,
- "mcp23s08 only supports address 0..3\n");
+ for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++)
+ pullups[addr] = 0;
+ } else {
+ type = spi_get_device_id(spi)->driver_data;
+ pdata = spi->dev.platform_data;
+ if (!pdata || !gpio_is_valid(pdata->base)) {
+ dev_dbg(&spi->dev,
+ "invalid or missing platform data\n");
return -EINVAL;
}
+
+ for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {
+ if (!pdata->chip[addr].is_present)
+ continue;
+ chips++;
+ if ((type == MCP_TYPE_S08) && (addr > 3)) {
+ dev_err(&spi->dev,
+ "mcp23s08 only supports address 0..3\n");
+ return -EINVAL;
+ }
+ spi_present_mask |= 1 << addr;
+ pullups[addr] = pdata->chip[addr].pullups;
+ }
+
+ if (!chips)
+ return -ENODEV;
+
+ base = pdata->base;
}
- if (!chips)
- return -ENODEV;
data = kzalloc(sizeof *data + chips * sizeof(struct mcp23s08),
GFP_KERNEL);
@@ -594,21 +667,22 @@ static int mcp23s08_probe(struct spi_device *spi)
return -ENOMEM;
spi_set_drvdata(spi, data);
- base = pdata->base;
for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {
- if (!pdata->chip[addr].is_present)
+ if (!(spi_present_mask & (1 << addr)))
continue;
chips--;
data->mcp[addr] = &data->chip[chips];
status = mcp23s08_probe_one(data->mcp[addr], &spi->dev, spi,
0x40 | (addr << 1), type, base,
- pdata->chip[addr].pullups);
+ pullups[addr]);
if (status < 0)
goto fail;
- base += (type == MCP_TYPE_S17) ? 16 : 8;
+ if (base != -1)
+ base += (type == MCP_TYPE_S17) ? 16 : 8;
+ ngpio += (type == MCP_TYPE_S17) ? 16 : 8;
}
- data->ngpio = base - pdata->base;
+ data->ngpio = ngpio;
/* NOTE: these chips have a relatively sane IRQ framework, with
* per-signal masking and level/edge triggering. It's not yet
@@ -668,6 +742,7 @@ static struct spi_driver mcp23s08_driver = {
.driver = {
.name = "mcp23s08",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(mcp23s08_spi_of_match),
},
};
diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 61a6fde6c089..bf69a7eff370 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -117,7 +117,7 @@ static inline void __iomem *mvebu_gpioreg_edge_cause(struct mvebu_gpio_chip *mvc
{
int cpu;
- switch(mvchip->soc_variant) {
+ switch (mvchip->soc_variant) {
case MVEBU_GPIO_SOC_VARIANT_ORION:
case MVEBU_GPIO_SOC_VARIANT_MV78200:
return mvchip->membase + GPIO_EDGE_CAUSE_OFF;
@@ -133,7 +133,7 @@ static inline void __iomem *mvebu_gpioreg_edge_mask(struct mvebu_gpio_chip *mvch
{
int cpu;
- switch(mvchip->soc_variant) {
+ switch (mvchip->soc_variant) {
case MVEBU_GPIO_SOC_VARIANT_ORION:
return mvchip->membase + GPIO_EDGE_MASK_OFF;
case MVEBU_GPIO_SOC_VARIANT_MV78200:
@@ -151,7 +151,7 @@ static void __iomem *mvebu_gpioreg_level_mask(struct mvebu_gpio_chip *mvchip)
{
int cpu;
- switch(mvchip->soc_variant) {
+ switch (mvchip->soc_variant) {
case MVEBU_GPIO_SOC_VARIANT_ORION:
return mvchip->membase + GPIO_LEVEL_MASK_OFF;
case MVEBU_GPIO_SOC_VARIANT_MV78200:
@@ -401,7 +401,7 @@ static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
/*
* Configure interrupt polarity.
*/
- switch(type) {
+ switch (type) {
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_LEVEL_HIGH:
u = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
@@ -470,18 +470,76 @@ static void mvebu_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
}
}
+#ifdef CONFIG_DEBUG_FS
+#include <linux/seq_file.h>
+
+static void mvebu_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
+{
+ struct mvebu_gpio_chip *mvchip =
+ container_of(chip, struct mvebu_gpio_chip, chip);
+ u32 out, io_conf, blink, in_pol, data_in, cause, edg_msk, lvl_msk;
+ int i;
+
+ out = readl_relaxed(mvebu_gpioreg_out(mvchip));
+ io_conf = readl_relaxed(mvebu_gpioreg_io_conf(mvchip));
+ blink = readl_relaxed(mvebu_gpioreg_blink(mvchip));
+ in_pol = readl_relaxed(mvebu_gpioreg_in_pol(mvchip));
+ data_in = readl_relaxed(mvebu_gpioreg_data_in(mvchip));
+ cause = readl_relaxed(mvebu_gpioreg_edge_cause(mvchip));
+ edg_msk = readl_relaxed(mvebu_gpioreg_edge_mask(mvchip));
+ lvl_msk = readl_relaxed(mvebu_gpioreg_level_mask(mvchip));
+
+ for (i = 0; i < chip->ngpio; i++) {
+ const char *label;
+ u32 msk;
+ bool is_out;
+
+ label = gpiochip_is_requested(chip, i);
+ if (!label)
+ continue;
+
+ msk = 1 << i;
+ is_out = !(io_conf & msk);
+
+ seq_printf(s, " gpio-%-3d (%-20.20s)", chip->base + i, label);
+
+ if (is_out) {
+ seq_printf(s, " out %s %s\n",
+ out & msk ? "hi" : "lo",
+ blink & msk ? "(blink )" : "");
+ continue;
+ }
+
+ seq_printf(s, " in %s (act %s) - IRQ",
+ (data_in ^ in_pol) & msk ? "hi" : "lo",
+ in_pol & msk ? "lo" : "hi");
+ if (!((edg_msk | lvl_msk) & msk)) {
+ seq_printf(s, " disabled\n");
+ continue;
+ }
+ if (edg_msk & msk)
+ seq_printf(s, " edge ");
+ if (lvl_msk & msk)
+ seq_printf(s, " level");
+ seq_printf(s, " (%s)\n", cause & msk ? "pending" : "clear ");
+ }
+}
+#else
+#define mvebu_gpio_dbg_show NULL
+#endif
+
static struct of_device_id mvebu_gpio_of_match[] = {
{
.compatible = "marvell,orion-gpio",
- .data = (void*) MVEBU_GPIO_SOC_VARIANT_ORION,
+ .data = (void *) MVEBU_GPIO_SOC_VARIANT_ORION,
},
{
.compatible = "marvell,mv78200-gpio",
- .data = (void*) MVEBU_GPIO_SOC_VARIANT_MV78200,
+ .data = (void *) MVEBU_GPIO_SOC_VARIANT_MV78200,
},
{
.compatible = "marvell,armadaxp-gpio",
- .data = (void*) MVEBU_GPIO_SOC_VARIANT_ARMADAXP,
+ .data = (void *) MVEBU_GPIO_SOC_VARIANT_ARMADAXP,
},
{
/* sentinel */
@@ -509,13 +567,13 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
soc_variant = MVEBU_GPIO_SOC_VARIANT_ORION;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (! res) {
+ if (!res) {
dev_err(&pdev->dev, "Cannot get memory resource\n");
return -ENODEV;
}
mvchip = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_gpio_chip), GFP_KERNEL);
- if (! mvchip){
+ if (!mvchip) {
dev_err(&pdev->dev, "Cannot allocate memory\n");
return -ENOMEM;
}
@@ -550,6 +608,7 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
mvchip->chip.ngpio = ngpios;
mvchip->chip.can_sleep = 0;
mvchip->chip.of_node = np;
+ mvchip->chip.dbg_show = mvebu_gpio_dbg_show;
spin_lock_init(&mvchip->lock);
mvchip->membase = devm_ioremap_resource(&pdev->dev, res);
@@ -560,21 +619,21 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
* per-CPU registers */
if (soc_variant == MVEBU_GPIO_SOC_VARIANT_ARMADAXP) {
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (! res) {
+ if (!res) {
dev_err(&pdev->dev, "Cannot get memory resource\n");
return -ENODEV;
}
mvchip->percpu_membase = devm_ioremap_resource(&pdev->dev,
res);
- if (IS_ERR(mvchip->percpu_membase))
+ if (IS_ERR(mvchip->percpu_membase))
return PTR_ERR(mvchip->percpu_membase);
}
/*
* Mask and clear GPIO interrupts.
*/
- switch(soc_variant) {
+ switch (soc_variant) {
case MVEBU_GPIO_SOC_VARIANT_ORION:
writel_relaxed(0, mvchip->membase + GPIO_EDGE_CAUSE_OFF);
writel_relaxed(0, mvchip->membase + GPIO_EDGE_MASK_OFF);
@@ -632,7 +691,7 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
gc = irq_alloc_generic_chip("mvebu_gpio_irq", 2, mvchip->irqbase,
mvchip->membase, handle_level_irq);
- if (! gc) {
+ if (!gc) {
dev_err(&pdev->dev, "Cannot allocate generic irq_chip\n");
return -ENOMEM;
}
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index a612ea1c53cb..2050891d9c65 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -52,7 +52,6 @@ struct gpio_bank {
struct list_head node;
void __iomem *base;
u16 irq;
- int irq_base;
struct irq_domain *domain;
u32 non_wakeup_gpios;
u32 enabled_non_wakeup_gpios;
@@ -88,7 +87,14 @@ struct gpio_bank {
static int irq_to_gpio(struct gpio_bank *bank, unsigned int gpio_irq)
{
- return gpio_irq - bank->irq_base + bank->chip.base;
+ return bank->chip.base + gpio_irq;
+}
+
+static int omap_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip);
+
+ return irq_find_mapping(bank->domain, offset);
}
static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
@@ -420,13 +426,16 @@ static int gpio_irq_type(struct irq_data *d, unsigned type)
int retval;
unsigned long flags;
+ if (WARN_ON(!bank->mod_usage))
+ return -EINVAL;
+
#ifdef CONFIG_ARCH_OMAP1
if (d->irq > IH_MPUIO_BASE)
gpio = OMAP_MPUIO(d->irq - IH_MPUIO_BASE);
#endif
if (!gpio)
- gpio = irq_to_gpio(bank, d->irq);
+ gpio = irq_to_gpio(bank, d->hwirq);
if (type & ~IRQ_TYPE_SENSE_MASK)
return -EINVAL;
@@ -579,7 +588,7 @@ static void _reset_gpio(struct gpio_bank *bank, int gpio)
static int gpio_wake_enable(struct irq_data *d, unsigned int enable)
{
struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
- unsigned int gpio = irq_to_gpio(bank, d->irq);
+ unsigned int gpio = irq_to_gpio(bank, d->hwirq);
return _set_gpio_wakeup(bank, gpio, enable);
}
@@ -679,7 +688,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
{
void __iomem *isr_reg = NULL;
u32 isr;
- unsigned int gpio_irq, gpio_index;
+ unsigned int bit;
struct gpio_bank *bank;
int unmasked = 0;
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -693,7 +702,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
if (WARN_ON(!isr_reg))
goto exit;
- while(1) {
+ while (1) {
u32 isr_saved, level_mask = 0;
u32 enabled;
@@ -720,14 +729,9 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
if (!isr)
break;
- gpio_irq = bank->irq_base;
- for (; isr != 0; isr >>= 1, gpio_irq++) {
- int gpio = irq_to_gpio(bank, gpio_irq);
-
- if (!(isr & 1))
- continue;
-
- gpio_index = GPIO_INDEX(bank, gpio);
+ while (isr) {
+ bit = __ffs(isr);
+ isr &= ~(1 << bit);
/*
* Some chips can't respond to both rising and falling
@@ -736,10 +740,10 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
* to respond to the IRQ for the opposite direction.
* This will be indicated in the bank toggle_mask.
*/
- if (bank->toggle_mask & (1 << gpio_index))
- _toggle_gpio_edge_triggering(bank, gpio_index);
+ if (bank->toggle_mask & (1 << bit))
+ _toggle_gpio_edge_triggering(bank, bit);
- generic_handle_irq(gpio_irq);
+ generic_handle_irq(irq_find_mapping(bank->domain, bit));
}
}
/* if bank has any level sensitive GPIO pin interrupt
@@ -755,7 +759,7 @@ exit:
static void gpio_irq_shutdown(struct irq_data *d)
{
struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
- unsigned int gpio = irq_to_gpio(bank, d->irq);
+ unsigned int gpio = irq_to_gpio(bank, d->hwirq);
unsigned long flags;
spin_lock_irqsave(&bank->lock, flags);
@@ -766,7 +770,7 @@ static void gpio_irq_shutdown(struct irq_data *d)
static void gpio_ack_irq(struct irq_data *d)
{
struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
- unsigned int gpio = irq_to_gpio(bank, d->irq);
+ unsigned int gpio = irq_to_gpio(bank, d->hwirq);
_clear_gpio_irqstatus(bank, gpio);
}
@@ -774,7 +778,7 @@ static void gpio_ack_irq(struct irq_data *d)
static void gpio_mask_irq(struct irq_data *d)
{
struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
- unsigned int gpio = irq_to_gpio(bank, d->irq);
+ unsigned int gpio = irq_to_gpio(bank, d->hwirq);
unsigned long flags;
spin_lock_irqsave(&bank->lock, flags);
@@ -786,7 +790,7 @@ static void gpio_mask_irq(struct irq_data *d)
static void gpio_unmask_irq(struct irq_data *d)
{
struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
- unsigned int gpio = irq_to_gpio(bank, d->irq);
+ unsigned int gpio = irq_to_gpio(bank, d->hwirq);
unsigned int irq_mask = GPIO_BIT(bank, gpio);
u32 trigger = irqd_get_trigger_type(d);
unsigned long flags;
@@ -952,14 +956,6 @@ static void gpio_set(struct gpio_chip *chip, unsigned offset, int value)
spin_unlock_irqrestore(&bank->lock, flags);
}
-static int gpio_2irq(struct gpio_chip *chip, unsigned offset)
-{
- struct gpio_bank *bank;
-
- bank = container_of(chip, struct gpio_bank, chip);
- return bank->irq_base + offset;
-}
-
/*---------------------------------------------------------------------*/
static void __init omap_gpio_show_rev(struct gpio_bank *bank)
@@ -1056,7 +1052,7 @@ static void omap_gpio_chip_init(struct gpio_bank *bank)
bank->chip.direction_output = gpio_output;
bank->chip.set_debounce = gpio_debounce;
bank->chip.set = gpio_set;
- bank->chip.to_irq = gpio_2irq;
+ bank->chip.to_irq = omap_gpio_to_irq;
if (bank->is_mpuio) {
bank->chip.label = "mpuio";
if (bank->regs->wkup_en)
@@ -1071,15 +1067,16 @@ static void omap_gpio_chip_init(struct gpio_bank *bank)
gpiochip_add(&bank->chip);
- for (j = bank->irq_base; j < bank->irq_base + bank->width; j++) {
- irq_set_lockdep_class(j, &gpio_lock_class);
- irq_set_chip_data(j, bank);
+ for (j = 0; j < bank->width; j++) {
+ int irq = irq_create_mapping(bank->domain, j);
+ irq_set_lockdep_class(irq, &gpio_lock_class);
+ irq_set_chip_data(irq, bank);
if (bank->is_mpuio) {
- omap_mpuio_alloc_gc(bank, j, bank->width);
+ omap_mpuio_alloc_gc(bank, irq, bank->width);
} else {
- irq_set_chip(j, &gpio_irq_chip);
- irq_set_handler(j, handle_simple_irq);
- set_irq_flags(j, IRQF_VALID);
+ irq_set_chip_and_handler(irq, &gpio_irq_chip,
+ handle_simple_irq);
+ set_irq_flags(irq, IRQF_VALID);
}
}
irq_set_chained_handler(bank->irq, gpio_irq_handler);
@@ -1096,7 +1093,6 @@ static int omap_gpio_probe(struct platform_device *pdev)
const struct omap_gpio_platform_data *pdata;
struct resource *res;
struct gpio_bank *bank;
- int ret = 0;
match = of_match_device(of_match_ptr(omap_gpio_match), dev);
@@ -1123,20 +1119,22 @@ static int omap_gpio_probe(struct platform_device *pdev)
bank->width = pdata->bank_width;
bank->is_mpuio = pdata->is_mpuio;
bank->non_wakeup_gpios = pdata->non_wakeup_gpios;
- bank->loses_context = pdata->loses_context;
bank->regs = pdata->regs;
#ifdef CONFIG_OF_GPIO
bank->chip.of_node = of_node_get(node);
#endif
-
- bank->irq_base = irq_alloc_descs(-1, 0, bank->width, 0);
- if (bank->irq_base < 0) {
- dev_err(dev, "Couldn't allocate IRQ numbers\n");
- return -ENODEV;
+ if (node) {
+ if (!of_property_read_bool(node, "ti,gpio-always-on"))
+ bank->loses_context = true;
+ } else {
+ bank->loses_context = pdata->loses_context;
}
- bank->domain = irq_domain_add_legacy(node, bank->width, bank->irq_base,
- 0, &irq_domain_simple_ops, NULL);
+
+ bank->domain = irq_domain_add_linear(node, bank->width,
+ &irq_domain_simple_ops, NULL);
+ if (!bank->domain)
+ return -ENODEV;
if (bank->regs->set_dataout && bank->regs->clr_dataout)
bank->set_dataout = _set_gpio_dataout_reg;
@@ -1149,18 +1147,21 @@ static int omap_gpio_probe(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (unlikely(!res)) {
dev_err(dev, "Invalid mem resource\n");
+ irq_domain_remove(bank->domain);
return -ENODEV;
}
if (!devm_request_mem_region(dev, res->start, resource_size(res),
pdev->name)) {
dev_err(dev, "Region already claimed\n");
+ irq_domain_remove(bank->domain);
return -EBUSY;
}
bank->base = devm_ioremap(dev, res->start, resource_size(res));
if (!bank->base) {
dev_err(dev, "Could not ioremap\n");
+ irq_domain_remove(bank->domain);
return -ENOMEM;
}
@@ -1184,7 +1185,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
list_add_tail(&bank->node, &omap_gpio_list);
- return ret;
+ return 0;
}
#ifdef CONFIG_ARCH_OMAP2PLUS
@@ -1262,9 +1263,9 @@ static int omap_gpio_runtime_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct gpio_bank *bank = platform_get_drvdata(pdev);
- int context_lost_cnt_after;
u32 l = 0, gen, gen0, gen1;
unsigned long flags;
+ int c;
spin_lock_irqsave(&bank->lock, flags);
_gpio_dbck_enable(bank);
@@ -1280,14 +1281,17 @@ static int omap_gpio_runtime_resume(struct device *dev)
__raw_writel(bank->context.risingdetect,
bank->base + bank->regs->risingdetect);
- if (bank->get_context_loss_count) {
- context_lost_cnt_after =
- bank->get_context_loss_count(bank->dev);
- if (context_lost_cnt_after != bank->context_loss_count) {
+ if (bank->loses_context) {
+ if (!bank->get_context_loss_count) {
omap_gpio_restore_context(bank);
} else {
- spin_unlock_irqrestore(&bank->lock, flags);
- return 0;
+ c = bank->get_context_loss_count(bank->dev);
+ if (c != bank->context_loss_count) {
+ omap_gpio_restore_context(bank);
+ } else {
+ spin_unlock_irqrestore(&bank->lock, flags);
+ return 0;
+ }
}
}
@@ -1296,10 +1300,6 @@ static int omap_gpio_runtime_resume(struct device *dev)
return 0;
}
- __raw_writel(bank->context.fallingdetect,
- bank->base + bank->regs->fallingdetect);
- __raw_writel(bank->context.risingdetect,
- bank->base + bank->regs->risingdetect);
l = __raw_readl(bank->base + bank->regs->datain);
/*
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 9391cf16e990..426c51dd420c 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -146,8 +146,7 @@ static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val)
ret = i2c_smbus_write_i2c_block_data(chip->client,
(reg << bank_shift) | REG_ADDR_AI,
NBANK(chip), val);
- }
- else {
+ } else {
switch (chip->chip_type) {
case PCA953X_TYPE:
ret = i2c_smbus_write_word_data(chip->client,
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index a19b7457a726..e8faf53f3875 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -45,6 +45,7 @@ static const struct i2c_device_id pcf857x_id[] = {
{ "pca9675", 16 },
{ "max7328", 8 },
{ "max7329", 8 },
+ { "tca9554", 8 },
{ }
};
MODULE_DEVICE_TABLE(i2c, pcf857x_id);
@@ -267,7 +268,7 @@ static int pcf857x_probe(struct i2c_client *client,
}
/* Allocate, initialize, and register this gpio_chip. */
- gpio = kzalloc(sizeof *gpio, GFP_KERNEL);
+ gpio = devm_kzalloc(&client->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio)
return -ENOMEM;
@@ -390,7 +391,6 @@ fail:
if (pdata && client->irq)
pcf857x_irq_domain_cleanup(gpio);
- kfree(gpio);
return status;
}
@@ -415,9 +415,7 @@ static int pcf857x_remove(struct i2c_client *client)
pcf857x_irq_domain_cleanup(gpio);
status = gpiochip_remove(&gpio->chip);
- if (status == 0)
- kfree(gpio);
- else
+ if (status)
dev_err(&client->dev, "%s --> %d\n", "remove", status);
return status;
}
diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
index d7a5c9d75525..df2199dd1499 100644
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -628,7 +628,7 @@ static int pxa_gpio_probe(struct platform_device *pdev)
for_each_gpio_chip(gpio, c) {
writel_relaxed(0, c->regbase + GFER_OFFSET);
writel_relaxed(0, c->regbase + GRER_OFFSET);
- writel_relaxed(~0,c->regbase + GEDR_OFFSET);
+ writel_relaxed(~0, c->regbase + GEDR_OFFSET);
/* unmask GPIO edge detect for AP side */
if (gpio_is_mmp_type(gpio_type))
writel_relaxed(~0, c->regbase + ED_MASK_OFFSET);
@@ -712,7 +712,7 @@ static void pxa_gpio_resume(void)
for_each_gpio_chip(gpio, c) {
/* restore level with set/clear */
- writel_relaxed( c->saved_gplr, c->regbase + GPSR_OFFSET);
+ writel_relaxed(c->saved_gplr, c->regbase + GPSR_OFFSET);
writel_relaxed(~c->saved_gplr, c->regbase + GPCR_OFFSET);
writel_relaxed(c->saved_grer, c->regbase + GRER_OFFSET);
diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
index 99e0fa49fcbd..b22ca7933745 100644
--- a/drivers/gpio/gpio-samsung.c
+++ b/drivers/gpio/gpio-samsung.c
@@ -3030,6 +3030,7 @@ static __init int samsung_gpiolib_init(void)
{ .compatible = "samsung,exynos4x12-pinctrl", },
{ .compatible = "samsung,exynos5250-pinctrl", },
{ .compatible = "samsung,exynos5440-pinctrl", },
+ { }
};
for_each_matching_node(pctrl_np, exynos_pinctrl_ids)
if (pctrl_np && of_device_is_available(pctrl_np))
diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c
index edae963f4625..1e4de16ceb41 100644
--- a/drivers/gpio/gpio-sch.c
+++ b/drivers/gpio/gpio-sch.c
@@ -125,13 +125,17 @@ static int sch_gpio_resume_direction_in(struct gpio_chip *gc,
unsigned gpio_num)
{
u8 curr_dirs;
+ unsigned short offset, bit;
spin_lock(&gpio_lock);
- curr_dirs = inb(gpio_ba + RGIO);
+ offset = RGIO + gpio_num / 8;
+ bit = gpio_num % 8;
+
+ curr_dirs = inb(gpio_ba + offset);
- if (!(curr_dirs & (1 << gpio_num)))
- outb(curr_dirs | (1 << gpio_num) , gpio_ba + RGIO);
+ if (!(curr_dirs & (1 << bit)))
+ outb(curr_dirs | (1 << bit), gpio_ba + offset);
spin_unlock(&gpio_lock);
return 0;
@@ -139,22 +143,31 @@ static int sch_gpio_resume_direction_in(struct gpio_chip *gc,
static int sch_gpio_resume_get(struct gpio_chip *gc, unsigned gpio_num)
{
- return !!(inb(gpio_ba + RGLV) & (1 << gpio_num));
+ unsigned short offset, bit;
+
+ offset = RGLV + gpio_num / 8;
+ bit = gpio_num % 8;
+
+ return !!(inb(gpio_ba + offset) & (1 << bit));
}
static void sch_gpio_resume_set(struct gpio_chip *gc,
unsigned gpio_num, int val)
{
u8 curr_vals;
+ unsigned short offset, bit;
spin_lock(&gpio_lock);
- curr_vals = inb(gpio_ba + RGLV);
+ offset = RGLV + gpio_num / 8;
+ bit = gpio_num % 8;
+
+ curr_vals = inb(gpio_ba + offset);
if (val)
- outb(curr_vals | (1 << gpio_num), gpio_ba + RGLV);
+ outb(curr_vals | (1 << bit), gpio_ba + offset);
else
- outb((curr_vals & ~(1 << gpio_num)), gpio_ba + RGLV);
+ outb((curr_vals & ~(1 << bit)), gpio_ba + offset);
spin_unlock(&gpio_lock);
}
@@ -163,14 +176,18 @@ static int sch_gpio_resume_direction_out(struct gpio_chip *gc,
unsigned gpio_num, int val)
{
u8 curr_dirs;
+ unsigned short offset, bit;
sch_gpio_resume_set(gc, gpio_num, val);
+ offset = RGIO + gpio_num / 8;
+ bit = gpio_num % 8;
+
spin_lock(&gpio_lock);
- curr_dirs = inb(gpio_ba + RGIO);
- if (curr_dirs & (1 << gpio_num))
- outb(curr_dirs & ~(1 << gpio_num), gpio_ba + RGIO);
+ curr_dirs = inb(gpio_ba + offset);
+ if (curr_dirs & (1 << bit))
+ outb(curr_dirs & ~(1 << bit), gpio_ba + offset);
spin_unlock(&gpio_lock);
return 0;
@@ -204,45 +221,41 @@ static int sch_gpio_probe(struct platform_device *pdev)
gpio_ba = res->start;
switch (id) {
- case PCI_DEVICE_ID_INTEL_SCH_LPC:
- sch_gpio_core.base = 0;
- sch_gpio_core.ngpio = 10;
-
- sch_gpio_resume.base = 10;
- sch_gpio_resume.ngpio = 4;
-
- /*
- * GPIO[6:0] enabled by default
- * GPIO7 is configured by the CMC as SLPIOVR
- * Enable GPIO[9:8] core powered gpios explicitly
- */
- outb(0x3, gpio_ba + CGEN + 1);
- /*
- * SUS_GPIO[2:0] enabled by default
- * Enable SUS_GPIO3 resume powered gpio explicitly
- */
- outb(0x8, gpio_ba + RGEN);
- break;
-
- case PCI_DEVICE_ID_INTEL_ITC_LPC:
- sch_gpio_core.base = 0;
- sch_gpio_core.ngpio = 5;
-
- sch_gpio_resume.base = 5;
- sch_gpio_resume.ngpio = 9;
- break;
-
- case PCI_DEVICE_ID_INTEL_CENTERTON_ILB:
- sch_gpio_core.base = 0;
- sch_gpio_core.ngpio = 21;
-
- sch_gpio_resume.base = 21;
- sch_gpio_resume.ngpio = 9;
- break;
-
- default:
- err = -ENODEV;
- goto err_sch_gpio_core;
+ case PCI_DEVICE_ID_INTEL_SCH_LPC:
+ sch_gpio_core.base = 0;
+ sch_gpio_core.ngpio = 10;
+ sch_gpio_resume.base = 10;
+ sch_gpio_resume.ngpio = 4;
+ /*
+ * GPIO[6:0] enabled by default
+ * GPIO7 is configured by the CMC as SLPIOVR
+ * Enable GPIO[9:8] core powered gpios explicitly
+ */
+ outb(0x3, gpio_ba + CGEN + 1);
+ /*
+ * SUS_GPIO[2:0] enabled by default
+ * Enable SUS_GPIO3 resume powered gpio explicitly
+ */
+ outb(0x8, gpio_ba + RGEN);
+ break;
+
+ case PCI_DEVICE_ID_INTEL_ITC_LPC:
+ sch_gpio_core.base = 0;
+ sch_gpio_core.ngpio = 5;
+ sch_gpio_resume.base = 5;
+ sch_gpio_resume.ngpio = 9;
+ break;
+
+ case PCI_DEVICE_ID_INTEL_CENTERTON_ILB:
+ sch_gpio_core.base = 0;
+ sch_gpio_core.ngpio = 21;
+ sch_gpio_resume.base = 21;
+ sch_gpio_resume.ngpio = 9;
+ break;
+
+ default:
+ err = -ENODEV;
+ goto err_sch_gpio_core;
}
sch_gpio_core.dev = &pdev->dev;
diff --git a/drivers/gpio/gpio-stp-xway.c b/drivers/gpio/gpio-stp-xway.c
index c20e05151212..04882a911b65 100644
--- a/drivers/gpio/gpio-stp-xway.c
+++ b/drivers/gpio/gpio-stp-xway.c
@@ -217,7 +217,7 @@ static int xway_stp_probe(struct platform_device *pdev)
chip->virt = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(chip->virt))
return PTR_ERR(chip->virt);
-
+
chip->gc.dev = &pdev->dev;
chip->gc.label = "stp-xway";
chip->gc.direction_output = xway_stp_dir_out;
diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c
index c0595bbf3268..d34d80dfb083 100644
--- a/drivers/gpio/gpio-tc3589x.c
+++ b/drivers/gpio/gpio-tc3589x.c
@@ -282,9 +282,9 @@ static void tc3589x_gpio_irq_unmap(struct irq_domain *d, unsigned int virq)
}
static struct irq_domain_ops tc3589x_irq_ops = {
- .map = tc3589x_gpio_irq_map,
- .unmap = tc3589x_gpio_irq_unmap,
- .xlate = irq_domain_xlate_twocell,
+ .map = tc3589x_gpio_irq_map,
+ .unmap = tc3589x_gpio_irq_unmap,
+ .xlate = irq_domain_xlate_twocell,
};
static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio,
@@ -344,7 +344,7 @@ static int tc3589x_gpio_probe(struct platform_device *pdev)
tc3589x_gpio->chip.base = (pdata) ? pdata->gpio_base : -1;
#ifdef CONFIG_OF_GPIO
- tc3589x_gpio->chip.of_node = np;
+ tc3589x_gpio->chip.of_node = np;
#endif
tc3589x_gpio->irq_base = tc3589x->irq_base ?
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
index dde0656ea951..da4cb5b0cb87 100644
--- a/drivers/gpio/gpio-tegra.c
+++ b/drivers/gpio/gpio-tegra.c
@@ -414,10 +414,11 @@ static int tegra_gpio_probe(struct platform_device *pdev)
int j;
match = of_match_device(tegra_gpio_of_match, &pdev->dev);
- if (match)
- config = (struct tegra_gpio_soc_config *)match->data;
- else
- config = &tegra20_gpio_config;
+ if (!match) {
+ dev_err(&pdev->dev, "Error: No device match found\n");
+ return -ENODEV;
+ }
+ config = (struct tegra_gpio_soc_config *)match->data;
tegra_gpio_bank_stride = config->bank_stride;
tegra_gpio_upper_offset = config->upper_offset;
@@ -478,9 +479,7 @@ static int tegra_gpio_probe(struct platform_device *pdev)
}
}
-#ifdef CONFIG_OF_GPIO
tegra_gpio_chip.of_node = pdev->dev.of_node;
-#endif
gpiochip_add(&tegra_gpio_chip);
diff --git a/drivers/gpio/gpio-timberdale.c b/drivers/gpio/gpio-timberdale.c
index 702cca9284f1..43774058b693 100644
--- a/drivers/gpio/gpio-timberdale.c
+++ b/drivers/gpio/gpio-timberdale.c
@@ -167,8 +167,7 @@ static int timbgpio_irq_type(struct irq_data *d, unsigned trigger)
if (ver < 3) {
ret = -EINVAL;
goto out;
- }
- else {
+ } else {
flr |= 1 << offset;
bflr |= 1 << offset;
}
diff --git a/drivers/gpio/gpio-tps65910.c b/drivers/gpio/gpio-tps65910.c
index 5083825a0348..06146219d9d2 100644
--- a/drivers/gpio/gpio-tps65910.c
+++ b/drivers/gpio/gpio-tps65910.c
@@ -133,7 +133,7 @@ static int tps65910_gpio_probe(struct platform_device *pdev)
tps65910_gpio->gpio_chip.owner = THIS_MODULE;
tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name;
- switch(tps65910_chip_id(tps65910)) {
+ switch (tps65910_chip_id(tps65910)) {
case TPS65910:
tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO;
break;
diff --git a/drivers/gpio/gpio-viperboard.c b/drivers/gpio/gpio-viperboard.c
index 59d72391de26..095ab14cea4d 100644
--- a/drivers/gpio/gpio-viperboard.c
+++ b/drivers/gpio/gpio-viperboard.c
@@ -380,10 +380,6 @@ static int vprbrd_gpiob_direction_output(struct gpio_chip *chip,
struct vprbrd *vb = gpio->vb;
gpio->gpiob_out |= (1 << offset);
- if (value)
- gpio->gpiob_val |= (1 << offset);
- else
- gpio->gpiob_val &= ~(1 << offset);
mutex_lock(&vb->lock);
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index a063eb04b6ce..5c1ef2b3ef18 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -17,6 +17,13 @@
#include <linux/acpi.h>
#include <linux/interrupt.h>
+struct acpi_gpio_evt_pin {
+ struct list_head node;
+ acpi_handle *evt_handle;
+ unsigned int pin;
+ unsigned int irq;
+};
+
static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
{
if (!gc->dev)
@@ -54,7 +61,6 @@ int acpi_get_gpio(char *path, int pin)
}
EXPORT_SYMBOL_GPL(acpi_get_gpio);
-
static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
{
acpi_handle handle = data;
@@ -64,6 +70,27 @@ static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
return IRQ_HANDLED;
}
+static irqreturn_t acpi_gpio_irq_handler_evt(int irq, void *data)
+{
+ struct acpi_gpio_evt_pin *evt_pin = data;
+ struct acpi_object_list args;
+ union acpi_object arg;
+
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = evt_pin->pin;
+ args.count = 1;
+ args.pointer = &arg;
+
+ acpi_evaluate_object(evt_pin->evt_handle, NULL, &args, NULL);
+
+ return IRQ_HANDLED;
+}
+
+static void acpi_gpio_evt_dh(acpi_handle handle, void *data)
+{
+ /* The address of this function is used as a key. */
+}
+
/**
* acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events
* @chip: gpio chip
@@ -73,15 +100,13 @@ static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
* chip's interrupt handler. acpi_gpiochip_request_interrupts finds out which
* gpio pins have acpi event methods and assigns interrupt handlers that calls
* the acpi event methods for those pins.
- *
- * Interrupts are automatically freed on driver detach
*/
-
void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
{
struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL};
struct acpi_resource *res;
- acpi_handle handle, ev_handle;
+ acpi_handle handle, evt_handle;
+ struct list_head *evt_pins = NULL;
acpi_status status;
unsigned int pin;
int irq, ret;
@@ -98,13 +123,30 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
if (ACPI_FAILURE(status))
return;
- /* If a gpio interrupt has an acpi event handler method, then
- * set up an interrupt handler that calls the acpi event handler
- */
+ status = acpi_get_handle(handle, "_EVT", &evt_handle);
+ if (ACPI_SUCCESS(status)) {
+ evt_pins = kzalloc(sizeof(*evt_pins), GFP_KERNEL);
+ if (evt_pins) {
+ INIT_LIST_HEAD(evt_pins);
+ status = acpi_attach_data(handle, acpi_gpio_evt_dh,
+ evt_pins);
+ if (ACPI_FAILURE(status)) {
+ kfree(evt_pins);
+ evt_pins = NULL;
+ }
+ }
+ }
+ /*
+ * If a GPIO interrupt has an ACPI event handler method, or _EVT is
+ * present, set up an interrupt handler that calls the ACPI event
+ * handler.
+ */
for (res = buf.pointer;
res && (res->type != ACPI_RESOURCE_TYPE_END_TAG);
res = ACPI_NEXT_RESOURCE(res)) {
+ irq_handler_t handler = NULL;
+ void *data;
if (res->type != ACPI_RESOURCE_TYPE_GPIO ||
res->data.gpio.connection_type !=
@@ -115,23 +157,42 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
if (pin > chip->ngpio)
continue;
- sprintf(ev_name, "_%c%02X",
- res->data.gpio.triggering ? 'E' : 'L', pin);
-
- status = acpi_get_handle(handle, ev_name, &ev_handle);
- if (ACPI_FAILURE(status))
- continue;
-
irq = chip->to_irq(chip, pin);
if (irq < 0)
continue;
+ if (pin <= 255) {
+ acpi_handle ev_handle;
+
+ sprintf(ev_name, "_%c%02X",
+ res->data.gpio.triggering ? 'E' : 'L', pin);
+ status = acpi_get_handle(handle, ev_name, &ev_handle);
+ if (ACPI_SUCCESS(status)) {
+ handler = acpi_gpio_irq_handler;
+ data = ev_handle;
+ }
+ }
+ if (!handler && evt_pins) {
+ struct acpi_gpio_evt_pin *evt_pin;
+
+ evt_pin = kzalloc(sizeof(*evt_pin), GFP_KERNEL);
+ if (!evt_pin)
+ continue;
+
+ list_add_tail(&evt_pin->node, evt_pins);
+ evt_pin->evt_handle = evt_handle;
+ evt_pin->pin = pin;
+ evt_pin->irq = irq;
+ handler = acpi_gpio_irq_handler_evt;
+ data = evt_pin;
+ }
+ if (!handler)
+ continue;
+
/* Assume BIOS sets the triggering, so no flags */
- ret = devm_request_threaded_irq(chip->dev, irq, NULL,
- acpi_gpio_irq_handler,
- 0,
- "GPIO-signaled-ACPI-event",
- ev_handle);
+ ret = devm_request_threaded_irq(chip->dev, irq, NULL, handler,
+ 0, "GPIO-signaled-ACPI-event",
+ data);
if (ret)
dev_err(chip->dev,
"Failed to request IRQ %d ACPI event handler\n",
@@ -139,3 +200,119 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
}
}
EXPORT_SYMBOL(acpi_gpiochip_request_interrupts);
+
+struct acpi_gpio_lookup {
+ struct acpi_gpio_info info;
+ int index;
+ int gpio;
+ int n;
+};
+
+static int acpi_find_gpio(struct acpi_resource *ares, void *data)
+{
+ struct acpi_gpio_lookup *lookup = data;
+
+ if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
+ return 1;
+
+ if (lookup->n++ == lookup->index && lookup->gpio < 0) {
+ const struct acpi_resource_gpio *agpio = &ares->data.gpio;
+
+ lookup->gpio = acpi_get_gpio(agpio->resource_source.string_ptr,
+ agpio->pin_table[0]);
+ lookup->info.gpioint =
+ agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
+ }
+
+ return 1;
+}
+
+/**
+ * acpi_get_gpio_by_index() - get a GPIO number from device resources
+ * @dev: pointer to a device to get GPIO from
+ * @index: index of GpioIo/GpioInt resource (starting from %0)
+ * @info: info pointer to fill in (optional)
+ *
+ * Function goes through ACPI resources for @dev and based on @index looks
+ * up a GpioIo/GpioInt resource, translates it to the Linux GPIO number,
+ * and returns it. @index matches GpioIo/GpioInt resources only so if there
+ * are total %3 GPIO resources, the index goes from %0 to %2.
+ *
+ * If the GPIO cannot be translated or there is an error, negative errno is
+ * returned.
+ *
+ * Note: if the GPIO resource has multiple entries in the pin list, this
+ * function only returns the first.
+ */
+int acpi_get_gpio_by_index(struct device *dev, int index,
+ struct acpi_gpio_info *info)
+{
+ struct acpi_gpio_lookup lookup;
+ struct list_head resource_list;
+ struct acpi_device *adev;
+ acpi_handle handle;
+ int ret;
+
+ if (!dev)
+ return -EINVAL;
+
+ handle = ACPI_HANDLE(dev);
+ if (!handle || acpi_bus_get_device(handle, &adev))
+ return -ENODEV;
+
+ memset(&lookup, 0, sizeof(lookup));
+ lookup.index = index;
+ lookup.gpio = -ENODEV;
+
+ INIT_LIST_HEAD(&resource_list);
+ ret = acpi_dev_get_resources(adev, &resource_list, acpi_find_gpio,
+ &lookup);
+ if (ret < 0)
+ return ret;
+
+ acpi_dev_free_resource_list(&resource_list);
+
+ if (lookup.gpio >= 0 && info)
+ *info = lookup.info;
+
+ return lookup.gpio;
+}
+EXPORT_SYMBOL_GPL(acpi_get_gpio_by_index);
+
+/**
+ * acpi_gpiochip_free_interrupts() - Free GPIO _EVT ACPI event interrupts.
+ * @chip: gpio chip
+ *
+ * Free interrupts associated with the _EVT method for the given GPIO chip.
+ *
+ * The remaining ACPI event interrupts associated with the chip are freed
+ * automatically.
+ */
+void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
+{
+ acpi_handle handle;
+ acpi_status status;
+ struct list_head *evt_pins;
+ struct acpi_gpio_evt_pin *evt_pin, *ep;
+
+ if (!chip->dev || !chip->to_irq)
+ return;
+
+ handle = ACPI_HANDLE(chip->dev);
+ if (!handle)
+ return;
+
+ status = acpi_get_data(handle, acpi_gpio_evt_dh, (void **)&evt_pins);
+ if (ACPI_FAILURE(status))
+ return;
+
+ list_for_each_entry_safe_reverse(evt_pin, ep, evt_pins, node) {
+ devm_free_irq(chip->dev, evt_pin->irq, evt_pin);
+ list_del(&evt_pin->node);
+ kfree(evt_pin);
+ }
+
+ acpi_detach_data(handle, acpi_gpio_evt_dh);
+ kfree(evt_pins);
+}
+EXPORT_SYMBOL(acpi_gpiochip_free_interrupts);
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 465f4ca57e80..665f9530c950 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -61,7 +61,7 @@ static int of_gpiochip_find_and_xlate(struct gpio_chip *gc, void *data)
* in flags for the GPIO.
*/
int of_get_named_gpio_flags(struct device_node *np, const char *propname,
- int index, enum of_gpio_flags *flags)
+ int index, enum of_gpio_flags *flags)
{
/* Return -EPROBE_DEFER to support probe() functions to be called
* later when the GPIO actually becomes available
diff --git a/include/linux/acpi_gpio.h b/include/linux/acpi_gpio.h
index b76ebd08ff8e..4c120a1e0ca3 100644
--- a/include/linux/acpi_gpio.h
+++ b/include/linux/acpi_gpio.h
@@ -1,13 +1,25 @@
#ifndef _LINUX_ACPI_GPIO_H_
#define _LINUX_ACPI_GPIO_H_
+#include <linux/device.h>
#include <linux/errno.h>
#include <linux/gpio.h>
+/**
+ * struct acpi_gpio_info - ACPI GPIO specific information
+ * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
+ */
+struct acpi_gpio_info {
+ bool gpioint;
+};
+
#ifdef CONFIG_GPIO_ACPI
int acpi_get_gpio(char *path, int pin);
+int acpi_get_gpio_by_index(struct device *dev, int index,
+ struct acpi_gpio_info *info);
void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
+void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
#else /* CONFIG_GPIO_ACPI */
@@ -16,7 +28,14 @@ static inline int acpi_get_gpio(char *path, int pin)
return -ENODEV;
}
+static inline int acpi_get_gpio_by_index(struct device *dev, int index,
+ struct acpi_gpio_info *info)
+{
+ return -ENODEV;
+}
+
static inline void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
+static inline void acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
#endif /* CONFIG_GPIO_ACPI */
diff --git a/include/linux/basic_mmio_gpio.h b/include/linux/basic_mmio_gpio.h
index 1c504ca5bdb3..d8a97ec0e2b8 100644
--- a/include/linux/basic_mmio_gpio.h
+++ b/include/linux/basic_mmio_gpio.h
@@ -72,5 +72,6 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
#define BGPIOF_BIG_ENDIAN BIT(0)
#define BGPIOF_UNREADABLE_REG_SET BIT(1) /* reg_set is unreadable */
#define BGPIOF_UNREADABLE_REG_DIR BIT(2) /* reg_dir is unreadable */
+#define BGPIOF_BIG_ENDIAN_BYTE_ORDER BIT(3)
#endif /* __BASIC_MMIO_GPIO_H */