[PATCH 1/3] pinctrl: rollback check for !dev->pins in pinctrl_pm_select*() APIs

[Grygorii Strashko <grygorii.strashko@ti.com>]

The pinctrl support in Device core assumed to be optional - so, It's
valid case, when there are no definition for default device's pinctrl
states in DT at all ("default", "active", "idle", "sleep").
And in this case dev->pins == NULL and pinctrl_pm_select*() API
should return 0 always.

Now the checks for !dev->pins have been removed from
pinctrl_pm_select*() API mistakenly by the patch
pinctrl: Remove duplicate code in pinctrl_pm_select_state functions
http://www.spinics.net/lists/arm-kernel/msg258829.html

Hence, rollback these checks in in pinctrl_pm_select*() APIs.

CC: Linus Walleij <linus.walleij@linaro.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
---
Seems this one can be squashed in series
[PATCH 0/4] improved support for runtime muxing for pinctrl"
http://www.spinics.net/lists/arm-kernel/msg258827.html

 drivers/pinctrl/core.c |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 4f58a97..ace4eb8 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -1390,6 +1390,9 @@ static int pinctrl_pm_select_state(struct device *dev, struct pinctrl_state *sta
  */
 int pinctrl_pm_select_default_state(struct device *dev)
 {
+	if (!dev->pins)
+		return 0;
+
 	return pinctrl_pm_select_state(dev, dev->pins->default_state);
 }
 EXPORT_SYMBOL_GPL(pinctrl_pm_select_default_state);
@@ -1400,6 +1403,9 @@ EXPORT_SYMBOL_GPL(pinctrl_pm_select_default_state);
  */
 int pinctrl_pm_select_active_state(struct device *dev)
 {
+	if (!dev->pins)
+		return 0;
+
 	return pinctrl_pm_select_state(dev, dev->pins->active_state);
 }
 EXPORT_SYMBOL_GPL(pinctrl_pm_select_active_state);
@@ -1410,6 +1416,9 @@ EXPORT_SYMBOL_GPL(pinctrl_pm_select_active_state);
  */
 int pinctrl_pm_select_sleep_state(struct device *dev)
 {
+	if (!dev->pins)
+		return 0;
+
 	return pinctrl_pm_select_state(dev, dev->pins->sleep_state);
 }
 EXPORT_SYMBOL_GPL(pinctrl_pm_select_sleep_state);
@@ -1420,6 +1429,9 @@ EXPORT_SYMBOL_GPL(pinctrl_pm_select_sleep_state);
  */
 int pinctrl_pm_select_idle_state(struct device *dev)
 {
+	if (!dev->pins)
+		return 0;
+
 	return pinctrl_pm_select_state(dev, dev->pins->idle_state);
 }
 EXPORT_SYMBOL_GPL(pinctrl_pm_select_idle_state);
-- 
1.7.9.5