diff options
| author | Magnus Damm <damm@opensource.se> | 2013-07-03 13:14:32 +0900 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-07-21 17:24:41 +0200 |
| commit | 640efa08cb635ae43d5ceae302b20c2c3f2035e5 (patch) | |
| tree | ce19cf6c4395f2e463c43e259734c775346412b5 | |
| parent | d22fcde0b5409a946567387dfdde79a07843bb78 (diff) | |
| download | kernel-common-640efa08cb635ae43d5ceae302b20c2c3f2035e5.tar.gz kernel-common-640efa08cb635ae43d5ceae302b20c2c3f2035e5.tar.bz2 kernel-common-640efa08cb635ae43d5ceae302b20c2c3f2035e5.zip | |
gpio: em: Add pinctrl support
Register the GPIO pin range, and request and free GPIO pins using the
pinctrl API. The pctl_name platform data member should be used by
platform devices to point out which pinctrl device to use.
Follows same style as "dc3465a gpio-rcar: Add pinctrl support",
by Laurent Pinchart, thanks to him.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
| -rw-r--r-- | drivers/gpio/gpio-em.c | 25 | ||||
| -rw-r--r-- | include/linux/platform_data/gpio-em.h | 1 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c index 5cba855638bf..eca119b58c21 100644 --- a/drivers/gpio/gpio-em.c +++ b/drivers/gpio/gpio-em.c @@ -30,6 +30,7 @@ #include <linux/gpio.h> #include <linux/slab.h> #include <linux/module.h> +#include <linux/pinctrl/consumer.h> #include <linux/platform_data/gpio-em.h> struct em_gio_priv { @@ -216,6 +217,21 @@ static int em_gio_to_irq(struct gpio_chip *chip, unsigned offset) return irq_create_mapping(gpio_to_priv(chip)->irq_domain, offset); } +static int em_gio_request(struct gpio_chip *chip, unsigned offset) +{ + return pinctrl_request_gpio(chip->base + offset); +} + +static void em_gio_free(struct gpio_chip *chip, unsigned offset) +{ + pinctrl_free_gpio(chip->base + offset); + + /* Set the GPIO as an input to ensure that the next GPIO request won't + * drive the GPIO pin as an output. + */ + em_gio_direction_input(chip, offset); +} + static int em_gio_irq_domain_map(struct irq_domain *h, unsigned int virq, irq_hw_number_t hw) { @@ -308,6 +324,8 @@ static int em_gio_probe(struct platform_device *pdev) gpio_chip->direction_output = em_gio_direction_output; gpio_chip->set = em_gio_set; gpio_chip->to_irq = em_gio_to_irq; + gpio_chip->request = em_gio_request; + gpio_chip->free = em_gio_free; gpio_chip->label = name; gpio_chip->owner = THIS_MODULE; gpio_chip->base = pdata->gpio_base; @@ -351,6 +369,13 @@ static int em_gio_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to add GPIO controller\n"); goto err1; } + + if (pdata->pctl_name) { + ret = gpiochip_add_pin_range(gpio_chip, pdata->pctl_name, 0, + gpio_chip->base, gpio_chip->ngpio); + if (ret < 0) + dev_warn(&pdev->dev, "failed to add pin range\n"); + } return 0; err1: diff --git a/include/linux/platform_data/gpio-em.h b/include/linux/platform_data/gpio-em.h index 573edfb046c4..7c5a519d2dcd 100644 --- a/include/linux/platform_data/gpio-em.h +++ b/include/linux/platform_data/gpio-em.h @@ -5,6 +5,7 @@ struct gpio_em_config { unsigned int gpio_base; unsigned int irq_base; unsigned int number_of_pins; + const char *pctl_name; }; #endif /* __GPIO_EM_H__ */ |