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gpio-rcar: Add pinctrl support 

Register the GPIO pin range, and request and free GPIO pins using the
pinctrl API.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Laurent Pinchart 2013-03-10 03:27:00 +01:00 committed by Simon Horman
parent 119f5e448d
commit dc3465a943
2 changed files with 24 additions and 0 deletions
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23
drivers/gpio/gpio-rcar.c
View File

@ -22,6 +22,7 @@
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_data/gpio-rcar.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
@ -190,6 +191,21 @@ static void gpio_rcar_config_general_input_output_mode(struct gpio_chip *chip,
spin_unlock_irqrestore(&p->lock, flags);
}
static int gpio_rcar_request(struct gpio_chip *chip, unsigned offset)
{
return pinctrl_request_gpio(chip->base + offset);
}
static void gpio_rcar_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.
*/
gpio_rcar_config_general_input_output_mode(chip, offset, false);
}
static int gpio_rcar_direction_input(struct gpio_chip *chip, unsigned offset)
{
gpio_rcar_config_general_input_output_mode(chip, offset, false);
@ -285,6 +301,8 @@ static int gpio_rcar_probe(struct platform_device *pdev)
}
gpio_chip = &p->gpio_chip;
gpio_chip->request = gpio_rcar_request;
gpio_chip->free = gpio_rcar_free;
gpio_chip->direction_input = gpio_rcar_direction_input;
gpio_chip->get = gpio_rcar_get;
gpio_chip->direction_output = gpio_rcar_direction_output;
@ -337,6 +355,11 @@ static int gpio_rcar_probe(struct platform_device *pdev)
p->config.irq_base, ret);
}
ret = gpiochip_add_pin_range(gpio_chip, p->config.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:

1
include/linux/platform_data/gpio-rcar.h
View File

@ -20,6 +20,7 @@ struct gpio_rcar_config {
unsigned int gpio_base;
unsigned int irq_base;
unsigned int number_of_pins;
const char *pctl_name;
};
#endif /* __GPIO_RCAR_H__ */