diff options
| -rw-r--r-- | drivers/base/pinctrl.c | 19 | ||||
| -rw-r--r-- | drivers/pinctrl/core.c | 61 | ||||
| -rw-r--r-- | include/linux/pinctrl/consumer.h | 34 | ||||
| -rw-r--r-- | include/linux/pinctrl/devinfo.h | 4 |
4 files changed, 118 insertions, 0 deletions
diff --git a/drivers/base/pinctrl.c b/drivers/base/pinctrl.c index 67a274e86727..5fb74b43848e 100644 --- a/drivers/base/pinctrl.c +++ b/drivers/base/pinctrl.c @@ -48,6 +48,25 @@ int pinctrl_bind_pins(struct device *dev) goto cleanup_get; } +#ifdef CONFIG_PM + /* + * If power management is enabled, we also look for the optional + * sleep and idle pin states, with semantics as defined in + * <linux/pinctrl/pinctrl-state.h> + */ + dev->pins->sleep_state = pinctrl_lookup_state(dev->pins->p, + PINCTRL_STATE_SLEEP); + if (IS_ERR(dev->pins->sleep_state)) + /* Not supplying this state is perfectly legal */ + dev_dbg(dev, "no sleep pinctrl state\n"); + + dev->pins->idle_state = pinctrl_lookup_state(dev->pins->p, + PINCTRL_STATE_IDLE); + if (IS_ERR(dev->pins->idle_state)) + /* Not supplying this state is perfectly legal */ + dev_dbg(dev, "no idle pinctrl state\n"); +#endif + return 0; /* diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c index 1f9608bd237e..dca9208f5463 100644 --- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -1196,6 +1196,67 @@ int pinctrl_force_default(struct pinctrl_dev *pctldev) } EXPORT_SYMBOL_GPL(pinctrl_force_default); +#ifdef CONFIG_PM + +/** + * pinctrl_pm_select_default_state() - select default pinctrl state for PM + * @dev: device to select default state for + */ +int pinctrl_pm_select_default_state(struct device *dev) +{ + struct dev_pin_info *pins = dev->pins; + int ret; + + if (!pins) + return 0; + if (IS_ERR(pins->default_state)) + return 0; /* No default state */ + ret = pinctrl_select_state(pins->p, pins->default_state); + if (ret) + dev_err(dev, "failed to activate default pinctrl state\n"); + return ret; +} + +/** + * pinctrl_pm_select_sleep_state() - select sleep pinctrl state for PM + * @dev: device to select sleep state for + */ +int pinctrl_pm_select_sleep_state(struct device *dev) +{ + struct dev_pin_info *pins = dev->pins; + int ret; + + if (!pins) + return 0; + if (IS_ERR(pins->sleep_state)) + return 0; /* No sleep state */ + ret = pinctrl_select_state(pins->p, pins->sleep_state); + if (ret) + dev_err(dev, "failed to activate pinctrl sleep state\n"); + return ret; +} + +/** + * pinctrl_pm_select_idle_state() - select idle pinctrl state for PM + * @dev: device to select idle state for + */ +int pinctrl_pm_select_idle_state(struct device *dev) +{ + struct dev_pin_info *pins = dev->pins; + int ret; + + if (!pins) + return 0; + if (IS_ERR(pins->idle_state)) + return 0; /* No idle state */ + ret = pinctrl_select_state(pins->p, pins->idle_state); + if (ret) + dev_err(dev, "failed to activate pinctrl idle state\n"); + return ret; +} + +#endif + #ifdef CONFIG_DEBUG_FS static int pinctrl_pins_show(struct seq_file *s, void *what) diff --git a/include/linux/pinctrl/consumer.h b/include/linux/pinctrl/consumer.h index 4aad3cea69ae..0f32f10e347d 100644 --- a/include/linux/pinctrl/consumer.h +++ b/include/linux/pinctrl/consumer.h @@ -40,6 +40,25 @@ extern int pinctrl_select_state(struct pinctrl *p, struct pinctrl_state *s); extern struct pinctrl * __must_check devm_pinctrl_get(struct device *dev); extern void devm_pinctrl_put(struct pinctrl *p); +#ifdef CONFIG_PM +extern int pinctrl_pm_select_default_state(struct device *dev); +extern int pinctrl_pm_select_sleep_state(struct device *dev); +extern int pinctrl_pm_select_idle_state(struct device *dev); +#else +static inline int pinctrl_pm_select_default_state(struct device *dev) +{ + return 0; +} +static inline int pinctrl_pm_select_sleep_state(struct device *dev) +{ + return 0; +} +static inline int pinctrl_pm_select_idle_state(struct device *dev) +{ + return 0; +} +#endif + #else /* !CONFIG_PINCTRL */ static inline int pinctrl_request_gpio(unsigned gpio) @@ -199,6 +218,21 @@ static inline int pin_config_group_set(const char *dev_name, return 0; } +static inline int pinctrl_pm_select_default_state(struct device *dev) +{ + return 0; +} + +static inline int pinctrl_pm_select_sleep_state(struct device *dev) +{ + return 0; +} + +static inline int pinctrl_pm_select_idle_state(struct device *dev) +{ + return 0; +} + #endif #endif /* __LINUX_PINCTRL_CONSUMER_H */ diff --git a/include/linux/pinctrl/devinfo.h b/include/linux/pinctrl/devinfo.h index 6e5f8a985ea7..281cb91ddcf5 100644 --- a/include/linux/pinctrl/devinfo.h +++ b/include/linux/pinctrl/devinfo.h @@ -28,6 +28,10 @@ struct dev_pin_info { struct pinctrl *p; struct pinctrl_state *default_state; +#ifdef CONFIG_PM + struct pinctrl_state *sleep_state; + struct pinctrl_state *idle_state; +#endif }; extern int pinctrl_bind_pins(struct device *dev); |