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Commit 20ec3e39 authored by Linus Walleij's avatar Linus Walleij
Browse files

gpio: move the pin ranges into gpio_device 



Instead of keeping this reference to the pin ranges in the
client driver-supplied gpio_chip, move it to the internal
gpio_device as the drivers have no need to inspect this.

Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 4e6fd26d

drivers/gpio/gpiolib-acpi.c

+9 −9
Original line number Diff line number Diff line
@@ -71,29 +71,29 @@ static int acpi_gpiochip_find(struct gpio_chip *gc, void *data) 
 * controller uses pin controller and the mapping is not contiguous the

 * offset might be different.

 */

static int acpi_gpiochip_pin_to_gpio_offset(struct gpio_chip *chip, int pin)

static int acpi_gpiochip_pin_to_gpio_offset(struct gpio_device *gdev, int pin)

{

	struct gpio_pin_range *pin_range;



	/* If there are no ranges in this chip, use 1:1 mapping */

	if (list_empty(&chip->pin_ranges))

	if (list_empty(&gdev->pin_ranges))

		return pin;



	list_for_each_entry(pin_range, &chip->pin_ranges, node) {

	list_for_each_entry(pin_range, &gdev->pin_ranges, node) {

		const struct pinctrl_gpio_range *range = &pin_range->range;

		int i;



		if (range->pins) {

			for (i = 0; i < range->npins; i++) {

				if (range->pins[i] == pin)

					return range->base + i - chip->base;

					return range->base + i - gdev->base;

			}

		} else {

			if (pin >= range->pin_base &&

			    pin < range->pin_base + range->npins) {

				unsigned gpio_base;



				gpio_base = range->base - chip->base;

				gpio_base = range->base - gdev->base;

				return gpio_base + pin - range->pin_base;

			}

		}
@@ -102,7 +102,7 @@ static int acpi_gpiochip_pin_to_gpio_offset(struct gpio_chip *chip, int pin) 
	return -EINVAL;

}

#else

static inline int acpi_gpiochip_pin_to_gpio_offset(struct gpio_chip *chip,

static inline int acpi_gpiochip_pin_to_gpio_offset(struct gpio_device *gdev,

						   int pin)

{

	return pin;
@@ -134,7 +134,7 @@ static struct gpio_desc *acpi_get_gpiod(char *path, int pin) 
	if (!chip)

		return ERR_PTR(-EPROBE_DEFER);



	offset = acpi_gpiochip_pin_to_gpio_offset(chip, pin);

	offset = acpi_gpiochip_pin_to_gpio_offset(chip->gpiodev, pin);

	if (offset < 0)

		return ERR_PTR(offset);
@@ -202,7 +202,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares, 
	if (!handler)

		return AE_BAD_PARAMETER;



	pin = acpi_gpiochip_pin_to_gpio_offset(chip, pin);

	pin = acpi_gpiochip_pin_to_gpio_offset(chip->gpiodev, pin);

	if (pin < 0)

		return AE_BAD_PARAMETER;
@@ -673,7 +673,7 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, 
		struct gpio_desc *desc;

		bool found;



		pin = acpi_gpiochip_pin_to_gpio_offset(chip, pin);

		pin = acpi_gpiochip_pin_to_gpio_offset(chip->gpiodev, pin);

		if (pin < 0) {

			status = AE_BAD_PARAMETER;

			goto out;

drivers/gpio/gpiolib.c

+5 −5
Original line number Diff line number Diff line
@@ -532,8 +532,7 @@ int gpiochip_add_data(struct gpio_chip *chip, void *data) 
	spin_unlock_irqrestore(&gpio_lock, flags);



#ifdef CONFIG_PINCTRL

	/* FIXME: move pin ranges to gpio_device */

	INIT_LIST_HEAD(&chip->pin_ranges);

	INIT_LIST_HEAD(&gdev->pin_ranges);

#endif



	status = gpiochip_set_desc_names(chip);
@@ -1036,7 +1035,7 @@ int gpiochip_add_pingroup_range(struct gpio_chip *chip, 
		 gpio_offset, gpio_offset + pin_range->range.npins - 1,

		 pinctrl_dev_get_devname(pctldev), pin_group);



	list_add_tail(&pin_range->node, &chip->pin_ranges);

	list_add_tail(&pin_range->node, &gdev->pin_ranges);



	return 0;

}
@@ -1085,7 +1084,7 @@ int gpiochip_add_pin_range(struct gpio_chip *chip, const char *pinctl_name, 
		 pinctl_name,

		 pin_offset, pin_offset + npins - 1);



	list_add_tail(&pin_range->node, &chip->pin_ranges);

	list_add_tail(&pin_range->node, &gdev->pin_ranges);



	return 0;

}
@@ -1098,8 +1097,9 @@ EXPORT_SYMBOL_GPL(gpiochip_add_pin_range); 
void gpiochip_remove_pin_ranges(struct gpio_chip *chip)

{

	struct gpio_pin_range *pin_range, *tmp;

	struct gpio_device *gdev = chip->gpiodev;



	list_for_each_entry_safe(pin_range, tmp, &chip->pin_ranges, node) {

	list_for_each_entry_safe(pin_range, tmp, &gdev->pin_ranges, node) {

		list_del(&pin_range->node);

		pinctrl_remove_gpio_range(pin_range->pctldev,

				&pin_range->range);

drivers/gpio/gpiolib.h

+10 −0
Original line number Diff line number Diff line
@@ -55,6 +55,16 @@ struct gpio_device { 
	int			base;

	u16			ngpio;

	struct list_head        list;



#ifdef CONFIG_PINCTRL

	/*

	 * If CONFIG_PINCTRL is enabled, then gpio controllers can optionally

	 * describe the actual pin range which they serve in an SoC. This

	 * information would be used by pinctrl subsystem to configure

	 * corresponding pins for gpio usage.

	 */

	struct list_head pin_ranges;

#endif

};



/**

include/linux/gpio/driver.h

+0 −9
Original line number Diff line number Diff line
@@ -181,15 +181,6 @@ struct gpio_chip { 
	int (*of_xlate)(struct gpio_chip *gc,

			const struct of_phandle_args *gpiospec, u32 *flags);

#endif

#ifdef CONFIG_PINCTRL

	/*

	 * If CONFIG_PINCTRL is enabled, then gpio controllers can optionally

	 * describe the actual pin range which they serve in an SoC. This

	 * information would be used by pinctrl subsystem to configure

	 * corresponding pins for gpio usage.

	 */

	struct list_head pin_ranges;

#endif

};



extern const char *gpiochip_is_requested(struct gpio_chip *chip,