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yaml
---
r: 358577
b: refs/heads/master
c: 261a5ed
h: refs/heads/master
i:
  358575: f10e665
v: v3
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Peter Ujfalusi authored and Bryan Wu committed Feb 2, 2013
1 parent 401bdc1 commit 1d7f670
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Showing 3 changed files with 40 additions and 1 deletion.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 8eb9612799605a7988d1c97cdc5980a5b8f04c56
refs/heads/master: 261a5edd3ac77ecb4b33310a1dd1ed8d656f0569
30 changes: 30 additions & 0 deletions trunk/drivers/pwm/core.c
Original file line number Diff line number Diff line change
Expand Up @@ -708,6 +708,36 @@ struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id)
}
EXPORT_SYMBOL_GPL(devm_pwm_get);

/**
* devm_of_pwm_get() - resource managed of_pwm_get()
* @dev: device for PWM consumer
* @np: device node to get the PWM from
* @con_id: consumer name
*
* This function performs like of_pwm_get() but the acquired PWM device will
* automatically be released on driver detach.
*/
struct pwm_device *devm_of_pwm_get(struct device *dev, struct device_node *np,
const char *con_id)
{
struct pwm_device **ptr, *pwm;

ptr = devres_alloc(devm_pwm_release, sizeof(**ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);

pwm = of_pwm_get(np, con_id);
if (!IS_ERR(pwm)) {
*ptr = pwm;
devres_add(dev, ptr);
} else {
devres_free(ptr);
}

return pwm;
}
EXPORT_SYMBOL_GPL(devm_of_pwm_get);

static int devm_pwm_match(struct device *dev, void *res, void *data)
{
struct pwm_device **p = res;
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9 changes: 9 additions & 0 deletions trunk/include/linux/pwm.h
Original file line number Diff line number Diff line change
Expand Up @@ -179,6 +179,8 @@ struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id);
void pwm_put(struct pwm_device *pwm);

struct pwm_device *devm_pwm_get(struct device *dev, const char *con_id);
struct pwm_device *devm_of_pwm_get(struct device *dev, struct device_node *np,
const char *con_id);
void devm_pwm_put(struct device *dev, struct pwm_device *pwm);
#else
static inline int pwm_set_chip_data(struct pwm_device *pwm, void *data)
Expand Down Expand Up @@ -230,6 +232,13 @@ static inline struct pwm_device *devm_pwm_get(struct device *dev,
return ERR_PTR(-ENODEV);
}

static inline struct pwm_device *devm_of_pwm_get(struct device *dev,
struct device_node *np,
const char *con_id)
{
return ERR_PTR(-ENODEV);
}

static inline void devm_pwm_put(struct device *dev, struct pwm_device *pwm)
{
}
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