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-rw-r--r--drivers/sh/pfc/Kconfig13
-rw-r--r--drivers/sh/pfc/Makefile1
-rw-r--r--drivers/sh/pfc/core.c81
-rw-r--r--drivers/sh/pfc/gpio.c102
-rw-r--r--drivers/sh/pfc/pinctrl.c371
5 files changed, 437 insertions, 131 deletions
diff --git a/drivers/sh/pfc/Kconfig b/drivers/sh/pfc/Kconfig
index 95b04f4edb88..b743aaa543f8 100644
--- a/drivers/sh/pfc/Kconfig
+++ b/drivers/sh/pfc/Kconfig
@@ -4,8 +4,21 @@ config SH_PFC
# XXX move off the gpio dependency
depends on GENERIC_GPIO
select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB
+ select PINCTRL_SH_PFC
def_bool y
+#
+# Placeholder for now, rehome to drivers/pinctrl once the PFC APIs
+# have settled.
+#
+config PINCTRL_SH_PFC
+ tristate "SuperH PFC pin controller driver"
+ depends on SH_PFC
+ select PINCTRL
+ select PINMUX
+ select PINCONF
+ select GENERIC_PINCONF
+
config GPIO_SH_PFC
tristate "SuperH PFC GPIO support"
depends on SH_PFC && GPIOLIB
diff --git a/drivers/sh/pfc/Makefile b/drivers/sh/pfc/Makefile
index d81707744b27..7916027cce37 100644
--- a/drivers/sh/pfc/Makefile
+++ b/drivers/sh/pfc/Makefile
@@ -1,2 +1,3 @@
obj-y += core.o
+obj-$(CONFIG_PINCTRL_SH_PFC) += pinctrl.o
obj-$(CONFIG_GPIO_SH_PFC) += gpio.o
diff --git a/drivers/sh/pfc/core.c b/drivers/sh/pfc/core.c
index ce4579ebd602..02e9f62e2b28 100644
--- a/drivers/sh/pfc/core.c
+++ b/drivers/sh/pfc/core.c
@@ -19,6 +19,7 @@
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/ioport.h>
+#include <linux/pinctrl/machine.h>
static struct sh_pfc *sh_pfc __read_mostly;
@@ -501,49 +502,6 @@ int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
}
EXPORT_SYMBOL_GPL(sh_pfc_config_gpio);
-int sh_pfc_set_direction(struct sh_pfc *pfc, unsigned gpio,
- int new_pinmux_type)
-{
- int pinmux_type;
- int ret = -EINVAL;
-
- if (!pfc)
- goto err_out;
-
- pinmux_type = pfc->gpios[gpio].flags & PINMUX_FLAG_TYPE;
-
- switch (pinmux_type) {
- case PINMUX_TYPE_GPIO:
- break;
- case PINMUX_TYPE_OUTPUT:
- case PINMUX_TYPE_INPUT:
- case PINMUX_TYPE_INPUT_PULLUP:
- case PINMUX_TYPE_INPUT_PULLDOWN:
- sh_pfc_config_gpio(pfc, gpio, pinmux_type, GPIO_CFG_FREE);
- break;
- default:
- goto err_out;
- }
-
- if (sh_pfc_config_gpio(pfc, gpio,
- new_pinmux_type,
- GPIO_CFG_DRYRUN) != 0)
- goto err_out;
-
- if (sh_pfc_config_gpio(pfc, gpio,
- new_pinmux_type,
- GPIO_CFG_REQ) != 0)
- BUG();
-
- pfc->gpios[gpio].flags &= ~PINMUX_FLAG_TYPE;
- pfc->gpios[gpio].flags |= new_pinmux_type;
-
- ret = 0;
- err_out:
- return ret;
-}
-EXPORT_SYMBOL_GPL(sh_pfc_set_direction);
-
int register_sh_pfc(struct sh_pfc *pfc)
{
int (*initroutine)(struct sh_pfc *) = NULL;
@@ -563,16 +521,49 @@ int register_sh_pfc(struct sh_pfc *pfc)
spin_lock_init(&pfc->lock);
+ pinctrl_provide_dummies();
setup_data_regs(pfc);
sh_pfc = pfc;
- pr_info("%s support registered\n", pfc->name);
+ /*
+ * Initialize pinctrl bindings first
+ */
+ initroutine = symbol_request(sh_pfc_register_pinctrl);
+ if (initroutine) {
+ ret = (*initroutine)(pfc);
+ symbol_put_addr(initroutine);
+
+ if (unlikely(ret != 0))
+ goto err;
+ }
+
+ /*
+ * Then the GPIO chip
+ */
initroutine = symbol_request(sh_pfc_register_gpiochip);
if (initroutine) {
- (*initroutine)(pfc);
+ ret = (*initroutine)(pfc);
symbol_put_addr(initroutine);
+
+ /*
+ * If the GPIO chip fails to come up we still leave the
+ * PFC state as it is, given that there are already
+ * extant users of it that have succeeded by this point.
+ */
+ if (unlikely(ret != 0)) {
+ pr_notice("failed to init GPIO chip, ignoring...\n");
+ ret = 0;
+ }
}
+ pr_info("%s support registered\n", pfc->name);
+
return 0;
+
+err:
+ pfc_iounmap(pfc);
+ sh_pfc = NULL;
+
+ return ret;
}
diff --git a/drivers/sh/pfc/gpio.c b/drivers/sh/pfc/gpio.c
index d74e5a96024b..f37f0c6d89b3 100644
--- a/drivers/sh/pfc/gpio.c
+++ b/drivers/sh/pfc/gpio.c
@@ -16,6 +16,7 @@
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
struct sh_pfc_chip {
struct sh_pfc *pfc;
@@ -34,80 +35,12 @@ static struct sh_pfc *gpio_to_pfc(struct gpio_chip *gc)
static int sh_gpio_request(struct gpio_chip *gc, unsigned offset)
{
- struct sh_pfc *pfc = gpio_to_pfc(gc);
- struct pinmux_data_reg *dummy;
- unsigned long flags;
- int i, ret, pinmux_type;
-
- ret = -EINVAL;
-
- if (!pfc)
- goto err_out;
-
- spin_lock_irqsave(&pfc->lock, flags);
-
- if ((pfc->gpios[offset].flags & PINMUX_FLAG_TYPE) != PINMUX_TYPE_NONE)
- goto err_unlock;
-
- /* setup pin function here if no data is associated with pin */
-
- if (sh_pfc_get_data_reg(pfc, offset, &dummy, &i) != 0)
- pinmux_type = PINMUX_TYPE_FUNCTION;
- else
- pinmux_type = PINMUX_TYPE_GPIO;
-
- if (pinmux_type == PINMUX_TYPE_FUNCTION) {
- if (sh_pfc_config_gpio(pfc, offset,
- pinmux_type,
- GPIO_CFG_DRYRUN) != 0)
- goto err_unlock;
-
- if (sh_pfc_config_gpio(pfc, offset,
- pinmux_type,
- GPIO_CFG_REQ) != 0)
- BUG();
- }
-
- pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
- pfc->gpios[offset].flags |= pinmux_type;
-
- ret = 0;
- err_unlock:
- spin_unlock_irqrestore(&pfc->lock, flags);
- err_out:
- return ret;
+ return pinctrl_request_gpio(offset);
}
static void sh_gpio_free(struct gpio_chip *gc, unsigned offset)
{
- struct sh_pfc *pfc = gpio_to_pfc(gc);
- unsigned long flags;
- int pinmux_type;
-
- if (!pfc)
- return;
-
- spin_lock_irqsave(&pfc->lock, flags);
-
- pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
- sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
- pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
- pfc->gpios[offset].flags |= PINMUX_TYPE_NONE;
-
- spin_unlock_irqrestore(&pfc->lock, flags);
-}
-
-static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
-{
- struct sh_pfc *pfc = gpio_to_pfc(gc);
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&pfc->lock, flags);
- ret = sh_pfc_set_direction(pfc, offset, PINMUX_TYPE_INPUT);
- spin_unlock_irqrestore(&pfc->lock, flags);
-
- return ret;
+ pinctrl_free_gpio(offset);
}
static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value)
@@ -121,22 +54,6 @@ static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value)
sh_pfc_write_bit(dr, bit, value);
}
-static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
- int value)
-{
- struct sh_pfc *pfc = gpio_to_pfc(gc);
- unsigned long flags;
- int ret;
-
- sh_gpio_set_value(pfc, offset, value);
-
- spin_lock_irqsave(&pfc->lock, flags);
- ret = sh_pfc_set_direction(pfc, offset, PINMUX_TYPE_OUTPUT);
- spin_unlock_irqrestore(&pfc->lock, flags);
-
- return ret;
-}
-
static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio)
{
struct pinmux_data_reg *dr = NULL;
@@ -148,6 +65,19 @@ static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio)
return sh_pfc_read_bit(dr, bit);
}
+static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
+{
+ return pinctrl_gpio_direction_input(offset);
+}
+
+static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ sh_gpio_set_value(gpio_to_pfc(gc), offset, value);
+
+ return pinctrl_gpio_direction_output(offset);
+}
+
static int sh_gpio_get(struct gpio_chip *gc, unsigned offset)
{
return sh_gpio_get_value(gpio_to_pfc(gc), offset);
diff --git a/drivers/sh/pfc/pinctrl.c b/drivers/sh/pfc/pinctrl.c
new file mode 100644
index 000000000000..6008328594ff
--- /dev/null
+++ b/drivers/sh/pfc/pinctrl.c
@@ -0,0 +1,371 @@
+/*
+ * SuperH Pin Function Controller pinmux support.
+ *
+ * Copyright (C) 2012 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/sh_pfc.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf-generic.h>
+
+struct sh_pfc_pinctrl {
+ struct pinctrl_dev *pctl;
+ struct sh_pfc *pfc;
+
+ struct pinctrl_pin_desc *pads;
+ unsigned int nr_pads;
+};
+
+static struct sh_pfc_pinctrl *sh_pfc_pmx;
+
+/*
+ * No group support yet
+ */
+static int sh_pfc_get_noop_count(struct pinctrl_dev *pctldev)
+{
+ return 0;
+}
+
+static const char *sh_pfc_get_noop_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ return NULL;
+}
+
+static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned group,
+ const unsigned **pins, unsigned *num_pins)
+{
+ return -ENOTSUPP;
+}
+
+static struct pinctrl_ops sh_pfc_pinctrl_ops = {
+ .get_groups_count = sh_pfc_get_noop_count,
+ .get_group_name = sh_pfc_get_noop_name,
+ .get_group_pins = sh_pfc_get_group_pins,
+};
+
+
+/*
+ * No function support yet
+ */
+static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, unsigned func,
+ const char * const **groups,
+ unsigned * const num_groups)
+{
+ return 0;
+}
+
+static int sh_pfc_noop_enable(struct pinctrl_dev *pctldev, unsigned func,
+ unsigned group)
+{
+ return 0;
+}
+
+static void sh_pfc_noop_disable(struct pinctrl_dev *pctldev, unsigned func,
+ unsigned group)
+{
+}
+
+static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+ struct sh_pfc *pfc = pmx->pfc;
+ struct pinmux_data_reg *dummy;
+ unsigned long flags;
+ int i, ret, pinmux_type;
+
+ ret = -EINVAL;
+
+ spin_lock_irqsave(&pfc->lock, flags);
+
+ if ((pfc->gpios[offset].flags & PINMUX_FLAG_TYPE) != PINMUX_TYPE_NONE)
+ goto err;
+
+ /* setup pin function here if no data is associated with pin */
+ if (sh_pfc_get_data_reg(pfc, offset, &dummy, &i) != 0) {
+ pinmux_type = PINMUX_TYPE_FUNCTION;
+
+ if (sh_pfc_config_gpio(pfc, offset,
+ pinmux_type,
+ GPIO_CFG_DRYRUN) != 0)
+ goto err;
+
+ if (sh_pfc_config_gpio(pfc, offset,
+ pinmux_type,
+ GPIO_CFG_REQ) != 0)
+ goto err;
+ } else
+ pinmux_type = PINMUX_TYPE_GPIO;
+
+ pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
+ pfc->gpios[offset].flags |= pinmux_type;
+
+ ret = 0;
+
+err:
+ spin_unlock_irqrestore(&pfc->lock, flags);
+
+ return ret;
+}
+
+static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+ struct sh_pfc *pfc = pmx->pfc;
+ unsigned long flags;
+ int pinmux_type;
+
+ spin_lock_irqsave(&pfc->lock, flags);
+
+ pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
+
+ sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
+
+ pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
+ pfc->gpios[offset].flags |= PINMUX_TYPE_NONE;
+
+ spin_unlock_irqrestore(&pfc->lock, flags);
+}
+
+static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset, bool input)
+{
+ struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
+ struct sh_pfc *pfc = pmx->pfc;
+ unsigned long flags;
+ int pinmux_type, new_pinmux_type;
+ int ret = -EINVAL;
+
+ new_pinmux_type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT;
+
+ spin_lock_irqsave(&pfc->lock, flags);
+
+ pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
+
+ switch (pinmux_type) {
+ case PINMUX_TYPE_GPIO:
+ break;
+ case PINMUX_TYPE_OUTPUT:
+ case PINMUX_TYPE_INPUT:
+ case PINMUX_TYPE_INPUT_PULLUP:
+ case PINMUX_TYPE_INPUT_PULLDOWN:
+ sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
+ break;
+ default:
+ goto err;
+ }
+
+ if (sh_pfc_config_gpio(pfc, offset,
+ new_pinmux_type,
+ GPIO_CFG_DRYRUN) != 0)
+ goto err;
+
+ if (sh_pfc_config_gpio(pfc, offset,
+ new_pinmux_type,
+ GPIO_CFG_REQ) != 0)
+ BUG();
+
+ pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
+ pfc->gpios[offset].flags |= new_pinmux_type;
+
+ ret = 0;
+
+err:
+ spin_unlock_irqrestore(&pfc->lock, flags);
+
+ return ret;
+}
+
+static struct pinmux_ops sh_pfc_pinmux_ops = {
+ .get_functions_count = sh_pfc_get_noop_count,
+ .get_function_name = sh_pfc_get_noop_name,
+ .get_function_groups = sh_pfc_get_function_groups,
+ .enable = sh_pfc_noop_enable,
+ .disable = sh_pfc_noop_disable,
+ .gpio_request_enable = sh_pfc_gpio_request_enable,
+ .gpio_disable_free = sh_pfc_gpio_disable_free,
+ .gpio_set_direction = sh_pfc_gpio_set_direction,
+};
+
+static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long *config)
+{
+ return -ENOTSUPP;
+}
+
+static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned long config)
+{
+ return -EINVAL;
+}
+
+static struct pinconf_ops sh_pfc_pinconf_ops = {
+ .is_generic = true,
+ .pin_config_get = sh_pfc_pinconf_get,
+ .pin_config_set = sh_pfc_pinconf_set,
+};
+
+static struct pinctrl_gpio_range sh_pfc_gpio_range = {
+ .name = KBUILD_MODNAME,
+ .id = 0,
+};
+
+static struct pinctrl_desc sh_pfc_pinctrl_desc = {
+ .name = KBUILD_MODNAME,
+ .owner = THIS_MODULE,
+ .pctlops = &sh_pfc_pinctrl_ops,
+ .pmxops = &sh_pfc_pinmux_ops,
+ .confops = &sh_pfc_pinconf_ops,
+};
+
+int sh_pfc_register_pinctrl(struct sh_pfc *pfc)
+{
+ sh_pfc_pmx = kmalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL);
+ if (unlikely(!sh_pfc_pmx))
+ return -ENOMEM;
+
+ sh_pfc_pmx->pfc = pfc;
+
+ return 0;
+}
+
+/* pinmux ranges -> pinctrl pin descs */
+static int __devinit sh_pfc_map_gpios(struct sh_pfc *pfc,
+ struct sh_pfc_pinctrl *pmx)
+{
+ int i;
+
+ pmx->nr_pads = pfc->last_gpio - pfc->first_gpio + 1;
+
+ pmx->pads = kmalloc(sizeof(struct pinctrl_pin_desc) * pmx->nr_pads,
+ GFP_KERNEL);
+ if (unlikely(!pmx->pads)) {
+ pmx->nr_pads = 0;
+ return -ENOMEM;
+ }
+
+ /*
+ * We don't necessarily have a 1:1 mapping between pin and linux
+ * GPIO number, as the latter maps to the associated enum_id.
+ * Care needs to be taken to translate back to pin space when
+ * dealing with any pin configurations.
+ */
+ for (i = 0; i < pmx->nr_pads; i++) {
+ struct pinctrl_pin_desc *pin = pmx->pads + i;
+ struct pinmux_gpio *gpio = pfc->gpios + i;
+
+ pin->number = pfc->first_gpio + i;
+ pin->name = gpio->name;
+ }
+
+ sh_pfc_pinctrl_desc.pins = pmx->pads;
+ sh_pfc_pinctrl_desc.npins = pmx->nr_pads;
+
+ return 0;
+}
+
+static int __devinit sh_pfc_pinctrl_probe(struct platform_device *pdev)
+{
+ struct sh_pfc *pfc;
+ int ret;
+
+ if (unlikely(!sh_pfc_pmx))
+ return -ENODEV;
+
+ pfc = sh_pfc_pmx->pfc;
+
+ ret = sh_pfc_map_gpios(pfc, sh_pfc_pmx);
+ if (unlikely(ret != 0))
+ return ret;
+
+ sh_pfc_pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, &pdev->dev,
+ sh_pfc_pmx);
+ if (IS_ERR(sh_pfc_pmx->pctl)) {
+ ret = PTR_ERR(sh_pfc_pmx->pctl);
+ goto out;
+ }
+
+ sh_pfc_gpio_range.npins = pfc->last_gpio - pfc->first_gpio + 1;
+ sh_pfc_gpio_range.base = pfc->first_gpio;
+ sh_pfc_gpio_range.pin_base = pfc->first_gpio;
+
+ pinctrl_add_gpio_range(sh_pfc_pmx->pctl, &sh_pfc_gpio_range);
+
+ platform_set_drvdata(pdev, sh_pfc_pmx);
+
+ return 0;
+
+out:
+ kfree(sh_pfc_pmx->pads);
+ kfree(sh_pfc_pmx);
+ return ret;
+}
+
+static int __devexit sh_pfc_pinctrl_remove(struct platform_device *pdev)
+{
+ struct sh_pfc_pinctrl *pmx = platform_get_drvdata(pdev);
+
+ pinctrl_remove_gpio_range(pmx->pctl, &sh_pfc_gpio_range);
+ pinctrl_unregister(pmx->pctl);
+
+ platform_set_drvdata(pdev, NULL);
+
+ kfree(sh_pfc_pmx->pads);
+ kfree(sh_pfc_pmx);
+
+ return 0;
+}
+
+static struct platform_driver sh_pfc_pinctrl_driver = {
+ .probe = sh_pfc_pinctrl_probe,
+ .remove = __devexit_p(sh_pfc_pinctrl_remove),
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static struct platform_device sh_pfc_pinctrl_device = {
+ .name = KBUILD_MODNAME,
+ .id = -1,
+};
+
+static int __init sh_pfc_pinctrl_init(void)
+{
+ int rc;
+
+ rc = platform_driver_register(&sh_pfc_pinctrl_driver);
+ if (likely(!rc)) {
+ rc = platform_device_register(&sh_pfc_pinctrl_device);
+ if (unlikely(rc))
+ platform_driver_unregister(&sh_pfc_pinctrl_driver);
+ }
+
+ return rc;
+}
+
+static void __exit sh_pfc_pinctrl_exit(void)
+{
+ platform_driver_unregister(&sh_pfc_pinctrl_driver);
+}
+
+subsys_initcall(sh_pfc_pinctrl_init);
+module_exit(sh_pfc_pinctrl_exit);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 16:18:07 +0000