drivers: pinctrl sleep and idle states in the core
If a device have sleep and idle states in addition to the
default state, look up these in the core and stash them in
the pinctrl state container.
Add accessor functions for pinctrl consumers to put the pins
into "default", "sleep" and "idle" states passing nothing but
the struct device * affected.
Solution suggested by Kevin Hilman, Mark Brown and Dmitry
Torokhov in response to a patch series from Hebbar
Gururaja.
Cc: Hebbar Gururaja <gururaja.hebbar@ti.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/include/linux/pinctrl/consumer.h b/include/linux/pinctrl/consumer.h
index 4aad3ce..0f32f10 100644
--- a/include/linux/pinctrl/consumer.h
+++ b/include/linux/pinctrl/consumer.h
@@ -40,6 +40,25 @@
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 @@
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 6e5f8a9..281cb91 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);