diff options
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/core.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index 903138b1884..4a13da48fef 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -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 * @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 * parameter. */ -static struct pwm_device *of_pwm_request(struct device_node *np, - const char *con_id) +struct pwm_device *of_pwm_get(struct device_node *np, const char *con_id) { struct pwm_device *pwm = NULL; struct of_phandle_args args; @@ -545,6 +544,7 @@ put: return pwm; } +EXPORT_SYMBOL_GPL(of_pwm_get); /** * 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 */ 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 @@ -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; |