pinctrl: clarify idle vs sleep states
This pure documentation fix tries to align the "idle" and
"sleep" pin states to the idle and suspend states from
runtime PM.
Change-Id: I9f07d20b59e4f4849b5187b19490333f11a6be86
Cc: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Git-commit: 27df74677c545284fa1b9b814db5b94e2bc71ff2
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Hanumant Singh <hanumant@codeaurora.org>
diff --git a/include/linux/pinctrl/pinctrl-state.h b/include/linux/pinctrl/pinctrl-state.h
index 634608dc..b5919f8 100644
--- a/include/linux/pinctrl/pinctrl-state.h
+++ b/include/linux/pinctrl/pinctrl-state.h
@@ -6,13 +6,18 @@
* @PINCTRL_STATE_DEFAULT: the state the pinctrl handle shall be put
* into as default, usually this means the pins are up and ready to
* be used by the device driver. This state is commonly used by
- * hogs to configure muxing and pins at boot.
+ * hogs to configure muxing and pins at boot, and also as a state
+ * to go into when returning from sleep and idle in
+ * .pm_runtime_resume() or ordinary .resume() for example.
* @PINCTRL_STATE_IDLE: the state the pinctrl handle shall be put into
- * when the pins are idle. Could typically be set from a
- * pm_runtime_suspend() operation.
+ * when the pins are idle. This is a state where the system is relaxed
+ * but not fully sleeping - some power may be on but clocks gated for
+ * example. Could typically be set from a pm_runtime_suspend() or
+ * pm_runtime_idle() operation.
* @PINCTRL_STATE_SLEEP: the state the pinctrl handle shall be put into
- * when the pins are sleeping. Could typically be set from a
- * common suspend() function.
+ * when the pins are sleeping. This is a state where the system is in
+ * its lowest sleep state. Could typically be set from an
+ * ordinary .suspend() function.
*/
#define PINCTRL_STATE_DEFAULT "default"
#define PINCTRL_STATE_IDLE "idle"