diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pinctrl/core.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 59027ab8347a..2eaa1876534b 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -23,6 +23,7 @@ #include <linux/sysfs.h> #include <linux/debugfs.h> #include <linux/seq_file.h> +#include <linux/pinctrl/consumer.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/machine.h> #include "core.h" @@ -801,6 +802,61 @@ int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *state) } EXPORT_SYMBOL_GPL(pinctrl_select_state); +static void devm_pinctrl_release(struct device *dev, void *res) +{ + pinctrl_put(*(struct pinctrl **)res); +} + +/** + * struct devm_pinctrl_get() - Resource managed pinctrl_get() + * @dev: the device to obtain the handle for + * + * If there is a need to explicitly destroy the returned struct pinctrl, + * devm_pinctrl_put() should be used, rather than plain pinctrl_put(). + */ +struct pinctrl *devm_pinctrl_get(struct device *dev) +{ + struct pinctrl **ptr, *p; + + ptr = devres_alloc(devm_pinctrl_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + p = pinctrl_get(dev); + if (!IS_ERR(p)) { + *ptr = p; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return p; +} +EXPORT_SYMBOL_GPL(devm_pinctrl_get); + +static int devm_pinctrl_match(struct device *dev, void *res, void *data) +{ + struct pinctrl **p = res; + + return *p == data; +} + +/** + * devm_pinctrl_put() - Resource managed pinctrl_put() + * @p: the pinctrl handle to release + * + * Deallocate a struct pinctrl obtained via devm_pinctrl_get(). Normally + * this function will not need to be called and the resource management + * code will ensure that the resource is freed. + */ +void devm_pinctrl_put(struct pinctrl *p) +{ + WARN_ON(devres_destroy(p->dev, devm_pinctrl_release, + devm_pinctrl_match, p)); + pinctrl_put(p); +} +EXPORT_SYMBOL_GPL(devm_pinctrl_put); + int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps, bool dup, bool locked) { |