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authorLinus Torvalds <torvalds@linux-foundation.org>2020-10-14 15:56:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-14 15:56:58 -0700
commit1a31c12371556bfbe511edd268dab721b504d511 (patch)
tree862c9a1cf5fb3a95422c4f3db9650e84cd04b635 /drivers/gpio
parentf888bdf9823c85fe945c4eb3ba353f749dec3856 (diff)
parent6d81dc3c79d46b66b29712eb1ac5ad2cbe4231d2 (diff)
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Merge tag 'mfd-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones: "New Drivers: - Add support for initialising shared (between children) Regmaps - Add support for Kontron SL28CPLD - Add support for ENE KB3930 Embedded Controller - Add support for Intel FPGA PAC MAX 10 BMC New Device Support: - Add support for Power to Ricoh RN5T618 - Add support for UART to Intel Lakefield - Add support for LP87524_Q1 to Texas Instruments LP87565 New Functionality: - Device Tree; ene-kb3930, sl28cpld, syscon, lp87565, lp87524-q1 - Use new helper dev_err_probe(); madera-core, stmfx, wcd934x - Use new GPIOD API; dm355evm_msp - Add wake-up capability; sprd-sc27xx-spi - Add ACPI support; kempld-core Fix-ups: - Trivial (spelling/whitespace); Kconfig, ab8500 - Fix for unused variables; khadas-mcu, kempld-core - Remove unused header file(s); mt6360-core - Use correct IRQ flags in docs; act8945a, gateworks-gsc, rohm,bd70528-pmic - Add COMPILE_TEST support; asic3, tmio_core - Add dependency on I2C; SL28CPLD Bug Fixes: - Fix memory leak(s); sm501 - Do not free regmap_config's 'name' until exit; syscon" * tag 'mfd-next-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (34 commits) mfd: kempld-core: Fix unused variable 'kempld_acpi_table' when !ACPI mfd: sl28cpld: Depend on I2C mfd: asic3: Build if COMPILE_TEST=y dt-bindings: mfd: Correct interrupt flags in examples mfd: Add ACPI support to Kontron PLD driver mfd: intel-m10-bmc: Add Intel MAX 10 BMC chip support for Intel FPGA PAC mfd: lp87565: Add LP87524-Q1 variant dt-bindings: mfd: Add LP87524-Q1 dt-bindings: mfd: lp87565: Convert to yaml mfd: mt6360: Remove unused include <linux/version.h> mfd: sm501: Fix leaks in probe() mfd: syscon: Don't free allocated name for regmap_config dt-bindings: mfd: syscon: Document Exynos3 and Exynos5433 compatibles dt-bindings: mfd: syscon: Merge Samsung Exynos Sysreg bindings dt-bindings: mfd: ab8500: Remove weird Unicode characters mfd: sprd: Add wakeup capability for PMIC IRQ mfd: intel-lpss: Add device IDs for UART ports for Lakefield mfd: dm355evm_msp: Convert LEDs to GPIO descriptor table mfd: wcd934x: Simplify with dev_err_probe() mfd: stmfx: Simplify with dev_err_probe() ...
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/Kconfig12
-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/gpio-sl28cpld.c161
3 files changed, 174 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index e1376466d8b0..5d4de5cd6759 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1248,6 +1248,18 @@ config GPIO_RC5T583
This driver provides the support for driving/reading the gpio pins
of RC5T583 device through standard gpio library.
+config GPIO_SL28CPLD
+ tristate "Kontron sl28cpld GPIO support"
+ depends on MFD_SL28CPLD || COMPILE_TEST
+ select GPIO_REGMAP
+ select GPIOLIB_IRQCHIP
+ select REGMAP_IRQ
+ help
+ This enables support for the GPIOs found on the Kontron sl28 CPLD.
+
+ This driver can also be built as a module. If so, the module will be
+ called gpio-sl28cpld.
+
config GPIO_STMPE
bool "STMPE GPIOs"
depends on MFD_STMPE
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 6c3791a55a7b..09dada80ac34 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -131,6 +131,7 @@ obj-$(CONFIG_GPIO_SCH311X) += gpio-sch311x.o
obj-$(CONFIG_GPIO_SCH) += gpio-sch.o
obj-$(CONFIG_GPIO_SIFIVE) += gpio-sifive.o
obj-$(CONFIG_GPIO_SIOX) += gpio-siox.o
+obj-$(CONFIG_GPIO_SL28CPLD) += gpio-sl28cpld.o
obj-$(CONFIG_GPIO_SODAVILLE) += gpio-sodaville.o
obj-$(CONFIG_GPIO_SPEAR_SPICS) += gpio-spear-spics.o
obj-$(CONFIG_GPIO_SPRD) += gpio-sprd.o
diff --git a/drivers/gpio/gpio-sl28cpld.c b/drivers/gpio/gpio-sl28cpld.c
new file mode 100644
index 000000000000..889b8f5622c2
--- /dev/null
+++ b/drivers/gpio/gpio-sl28cpld.c
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * sl28cpld GPIO driver
+ *
+ * Copyright 2020 Michael Walle <michael@walle.cc>
+ */
+
+#include <linux/device.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/regmap.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+/* GPIO flavor */
+#define GPIO_REG_DIR 0x00
+#define GPIO_REG_OUT 0x01
+#define GPIO_REG_IN 0x02
+#define GPIO_REG_IE 0x03
+#define GPIO_REG_IP 0x04
+
+/* input-only flavor */
+#define GPI_REG_IN 0x00
+
+/* output-only flavor */
+#define GPO_REG_OUT 0x00
+
+enum sl28cpld_gpio_type {
+ SL28CPLD_GPIO = 1,
+ SL28CPLD_GPI,
+ SL28CPLD_GPO,
+};
+
+static const struct regmap_irq sl28cpld_gpio_irqs[] = {
+ REGMAP_IRQ_REG_LINE(0, 8),
+ REGMAP_IRQ_REG_LINE(1, 8),
+ REGMAP_IRQ_REG_LINE(2, 8),
+ REGMAP_IRQ_REG_LINE(3, 8),
+ REGMAP_IRQ_REG_LINE(4, 8),
+ REGMAP_IRQ_REG_LINE(5, 8),
+ REGMAP_IRQ_REG_LINE(6, 8),
+ REGMAP_IRQ_REG_LINE(7, 8),
+};
+
+static int sl28cpld_gpio_irq_init(struct platform_device *pdev,
+ unsigned int base,
+ struct gpio_regmap_config *config)
+{
+ struct regmap_irq_chip_data *irq_data;
+ struct regmap_irq_chip *irq_chip;
+ struct device *dev = &pdev->dev;
+ int irq, ret;
+
+ if (!device_property_read_bool(dev, "interrupt-controller"))
+ return 0;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ irq_chip = devm_kzalloc(dev, sizeof(*irq_chip), GFP_KERNEL);
+ if (!irq_chip)
+ return -ENOMEM;
+
+ irq_chip->name = "sl28cpld-gpio-irq",
+ irq_chip->irqs = sl28cpld_gpio_irqs;
+ irq_chip->num_irqs = ARRAY_SIZE(sl28cpld_gpio_irqs);
+ irq_chip->num_regs = 1;
+ irq_chip->status_base = base + GPIO_REG_IP;
+ irq_chip->mask_base = base + GPIO_REG_IE;
+ irq_chip->mask_invert = true,
+ irq_chip->ack_base = base + GPIO_REG_IP;
+
+ ret = devm_regmap_add_irq_chip_fwnode(dev, dev_fwnode(dev),
+ config->regmap, irq,
+ IRQF_SHARED | IRQF_ONESHOT,
+ 0, irq_chip, &irq_data);
+ if (ret)
+ return ret;
+
+ config->irq_domain = regmap_irq_get_domain(irq_data);
+
+ return 0;
+}
+
+static int sl28cpld_gpio_probe(struct platform_device *pdev)
+{
+ struct gpio_regmap_config config = {0};
+ enum sl28cpld_gpio_type type;
+ struct regmap *regmap;
+ u32 base;
+ int ret;
+
+ if (!pdev->dev.parent)
+ return -ENODEV;
+
+ type = (uintptr_t)device_get_match_data(&pdev->dev);
+ if (!type)
+ return -ENODEV;
+
+ ret = device_property_read_u32(&pdev->dev, "reg", &base);
+ if (ret)
+ return -EINVAL;
+
+ regmap = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!regmap)
+ return -ENODEV;
+
+ config.regmap = regmap;
+ config.parent = &pdev->dev;
+ config.ngpio = 8;
+
+ switch (type) {
+ case SL28CPLD_GPIO:
+ config.reg_dat_base = base + GPIO_REG_IN;
+ config.reg_set_base = base + GPIO_REG_OUT;
+ /* reg_dir_out_base might be zero */
+ config.reg_dir_out_base = GPIO_REGMAP_ADDR(base + GPIO_REG_DIR);
+
+ /* This type supports interrupts */
+ ret = sl28cpld_gpio_irq_init(pdev, base, &config);
+ if (ret)
+ return ret;
+ break;
+ case SL28CPLD_GPO:
+ config.reg_set_base = base + GPO_REG_OUT;
+ break;
+ case SL28CPLD_GPI:
+ config.reg_dat_base = base + GPI_REG_IN;
+ break;
+ default:
+ dev_err(&pdev->dev, "unknown type %d\n", type);
+ return -ENODEV;
+ }
+
+ return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config));
+}
+
+static const struct of_device_id sl28cpld_gpio_of_match[] = {
+ { .compatible = "kontron,sl28cpld-gpio", .data = (void *)SL28CPLD_GPIO },
+ { .compatible = "kontron,sl28cpld-gpi", .data = (void *)SL28CPLD_GPI },
+ { .compatible = "kontron,sl28cpld-gpo", .data = (void *)SL28CPLD_GPO },
+ {}
+};
+MODULE_DEVICE_TABLE(of, sl28cpld_gpio_of_match);
+
+static struct platform_driver sl28cpld_gpio_driver = {
+ .probe = sl28cpld_gpio_probe,
+ .driver = {
+ .name = "sl28cpld-gpio",
+ .of_match_table = sl28cpld_gpio_of_match,
+ },
+};
+module_platform_driver(sl28cpld_gpio_driver);
+
+MODULE_DESCRIPTION("sl28cpld GPIO Driver");
+MODULE_AUTHOR("Michael Walle <michael@walle.cc>");
+MODULE_LICENSE("GPL");