Commit 43699dea authored by Stephen Warren's avatar Stephen Warren Committed by Linus Walleij
Browse files

pinctrl: pass name instead of device to pin_config_* 



Obtaining a "struct pinctrl_dev *" is difficult for code not directly
related to the pinctrl subsystem. However, the device name of the pinctrl
device is fairly well known. So, modify pin_config_*() to take the device
name instead of the "struct pinctrl_dev *".

Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
[rebased on top of refactoring code]
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 63fd5984

Documentation/pinctrl.txt

+1 −1
Original line number Diff line number Diff line
@@ -208,7 +208,7 @@ unconnected. 


For example, a platform may do this:



ret = pin_config_set(dev, "FOO_GPIO_PIN", PLATFORM_X_PULL_UP);

ret = pin_config_set("foo-dev", "FOO_GPIO_PIN", PLATFORM_X_PULL_UP);



To pull up a pin to VDD. The pin configuration driver implements callbacks for

changing pin configuration in the pin controller ops like this:

drivers/pinctrl/pinconf.c

+32 −9
Original line number Diff line number Diff line
@@ -39,17 +39,22 @@ int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin, 


/**

 * pin_config_get() - get the configuration of a single pin parameter

 * @pctldev: pin controller device for this pin

 * @dev_name: name of the pin controller device for this pin

 * @name: name of the pin to get the config for

 * @config: the config pointed to by this argument will be filled in with the

 *	current pin state, it can be used directly by drivers as a numeral, or

 *	it can be dereferenced to any struct.

 */

int pin_config_get(struct pinctrl_dev *pctldev, const char *name,

int pin_config_get(const char *dev_name, const char *name,

			  unsigned long *config)

{

	struct pinctrl_dev *pctldev;

	int pin;



	pctldev = get_pinctrl_dev_from_dev(NULL, dev_name);

	if (!pctldev)

		return -EINVAL;



	pin = pin_get_from_name(pctldev, name);

	if (pin < 0)

		return pin;
@@ -82,17 +87,22 @@ int pin_config_set_for_pin(struct pinctrl_dev *pctldev, unsigned pin, 


/**

 * pin_config_set() - set the configuration of a single pin parameter

 * @pctldev: pin controller device for this pin

 * @dev_name: name of pin controller device for this pin

 * @name: name of the pin to set the config for

 * @config: the config in this argument will contain the desired pin state, it

 *	can be used directly by drivers as a numeral, or it can be dereferenced

 *	to any struct.

 */

int pin_config_set(struct pinctrl_dev *pctldev, const char *name,

int pin_config_set(const char *dev_name, const char *name,

		   unsigned long config)

{

	struct pinctrl_dev *pctldev;

	int pin;



	pctldev = get_pinctrl_dev_from_dev(NULL, dev_name);

	if (!pctldev)

		return -EINVAL;



	pin = pin_get_from_name(pctldev, name);

	if (pin < 0)

		return pin;
@@ -101,12 +111,18 @@ int pin_config_set(struct pinctrl_dev *pctldev, const char *name, 
}

EXPORT_SYMBOL(pin_config_set);



int pin_config_group_get(struct pinctrl_dev *pctldev, const char *pin_group,

int pin_config_group_get(const char *dev_name, const char *pin_group,

			 unsigned long *config)

{

	const struct pinconf_ops *ops = pctldev->desc->confops;

	struct pinctrl_dev *pctldev;

	const struct pinconf_ops *ops;

	int selector;



	pctldev = get_pinctrl_dev_from_dev(NULL, dev_name);

	if (!pctldev)

		return -EINVAL;

	ops = pctldev->desc->confops;



	if (!ops || !ops->pin_config_group_get) {

		dev_err(pctldev->dev, "cannot get configuration for pin "

			"group, missing group config get function in "
@@ -123,17 +139,24 @@ int pin_config_group_get(struct pinctrl_dev *pctldev, const char *pin_group, 
EXPORT_SYMBOL(pin_config_group_get);





int pin_config_group_set(struct pinctrl_dev *pctldev, const char *pin_group,

int pin_config_group_set(const char *dev_name, const char *pin_group,

			 unsigned long config)

{

	const struct pinctrl_ops *pctlops = pctldev->desc->pctlops;

	const struct pinconf_ops *ops = pctldev->desc->confops;

	struct pinctrl_dev *pctldev;

	const struct pinconf_ops *ops;

	const struct pinctrl_ops *pctlops;

	int selector;

	const unsigned *pins;

	unsigned num_pins;

	int ret;

	int i;



	pctldev = get_pinctrl_dev_from_dev(NULL, dev_name);

	if (!pctldev)

		return -EINVAL;

	ops = pctldev->desc->confops;

	pctlops = pctldev->desc->pctlops;



	if (!ops || (!ops->pin_config_group_set && !ops->pin_config_set)) {

		dev_err(pctldev->dev, "cannot configure pin group, missing "

			"config function in driver\n");

include/linux/pinctrl/pinconf.h

+8 −8
Original line number Diff line number Diff line
@@ -53,39 +53,39 @@ struct pinconf_ops { 
					   unsigned selector);

};



extern int pin_config_get(struct pinctrl_dev *pctldev, const char *name,

extern int pin_config_get(const char *dev_name, const char *name,

			  unsigned long *config);

extern int pin_config_set(struct pinctrl_dev *pctldev, const char *name,

extern int pin_config_set(const char *dev_name, const char *name,

			  unsigned long config);

extern int pin_config_group_get(struct pinctrl_dev *pctldev,

extern int pin_config_group_get(const char *dev_name,

				const char *pin_group,

				unsigned long *config);

extern int pin_config_group_set(struct pinctrl_dev *pctldev,

extern int pin_config_group_set(const char *dev_name,

				const char *pin_group,

				unsigned long config);



#else



static inline int pin_config_get(struct pinctrl_dev *pctldev, const char *name,

static inline int pin_config_get(const char *dev_name, const char *name,

				 unsigned long *config)

{

	return 0;

}



static inline int pin_config_set(struct pinctrl_dev *pctldev, const char *name,

static inline int pin_config_set(const char *dev_name, const char *name,

				 unsigned long config)

{

	return 0;

}



static inline int pin_config_group_get(struct pinctrl_dev *pctldev,

static inline int pin_config_group_get(const char *dev_name,

				       const char *pin_group,

				       unsigned long *config)

{

	return 0;

}



static inline int pin_config_group_set(struct pinctrl_dev *pctldev,

static inline int pin_config_group_set(const char *dev_name,

				       const char *pin_group,

				       unsigned long config)

{

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