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pwm: core: Rename of_pwm_request() to of_pwm_get() and export it

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Allow client driver to use of_pwm_get() to get the PWM they need. This
is needed for drivers which handle more than one PWM separately, like
leds-pwm driver, which have:

pwmleds {
	compatible = "pwm-leds";
	kpad {
		label = "omap4::keypad";
		pwms = <&twl_pwm 0 7812500>;
		max-brightness = <127>;
	};

	charging {
		label = "omap4:green:chrg";
		pwms = <&twl_pwmled 0 7812500>;
		max-brightness = <255>;
	};
};

in the dts files.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This commit is contained in:
Peter Ujfalusi 2012-12-21 01:43:58 -08:00 • committed by Bryan Wu
parent d4c0c4705b
commit 8eb9612799
2 changed files with 11 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

8
drivers/pwm/core.c
View file

@ -471,7 +471,7 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
} }
/** /**
* of_pwm_request() - request a PWM via the PWM framework * of_pwm_get() - request a PWM via the PWM framework
* @np: device node to get the PWM from * @np: device node to get the PWM from
* @con_id: consumer name * @con_id: consumer name
* *
@ -486,8 +486,7 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
* becomes mandatory for devices that look up the PWM device via the con_id * becomes mandatory for devices that look up the PWM device via the con_id
* parameter. * parameter.
*/ */
static struct pwm_device *of_pwm_request(struct device_node *np, struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id)
const char *con_id)
{ {
struct pwm_device *pwm = NULL; struct pwm_device *pwm = NULL;
struct of_phandle_args args; struct of_phandle_args args;
@ -545,6 +544,7 @@ put:
return pwm; return pwm;
} }
EXPORT_SYMBOL_GPL(of_pwm_get);
/** /**
* pwm_add_table() - register PWM device consumers * pwm_add_table() - register PWM device consumers
@ -587,7 +587,7 @@ struct pwm_device *pwm_get(struct device *dev, const char *con_id)
/* look up via DT first */ /* look up via DT first */
if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node) if (IS_ENABLED(CONFIG_OF) && dev && dev->of_node)
return of_pwm_request(dev->of_node, con_id); return of_pwm_get(dev->of_node, con_id);
/* /*
* We look up the provider in the static table typically provided by * We look up the provider in the static table typically provided by

7
include/linux/pwm.h
View file

@ -175,6 +175,7 @@ struct pwm_device *of_pwm_xlate_with_flags(struct pwm_chip *pc,
const struct of_phandle_args *args); const struct of_phandle_args *args);
struct pwm_device *pwm_get(struct device *dev, const char *con_id); struct pwm_device *pwm_get(struct device *dev, const char *con_id);
struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id);
void pwm_put(struct pwm_device *pwm); void pwm_put(struct pwm_device *pwm);
struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id); struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id);
@ -213,6 +214,12 @@ static inline struct pwm_device *pwm_get(struct device *dev,
return ERR_PTR(-ENODEV); return ERR_PTR(-ENODEV);
} }
static inline struct pwm_device *of_pwm_get(struct device_node *np,
const char *con_id)
{
return ERR_PTR(-ENODEV);
}
static inline void pwm_put(struct pwm_device *pwm) static inline void pwm_put(struct pwm_device *pwm)
{ {
} }