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authorLinus Walleij <linus.walleij@linaro.org>2013-06-05 17:30:33 +0400
committerLinus Walleij <linus.walleij@linaro.org>2013-06-16 13:56:52 +0400
commit14005ee270cad7078adbce6b7f3687b992a8334e (patch)
tree65771454d8f060007a489927cf9f70847503f4ce /drivers/pinctrl/core.c
parent7970cb770dffa23cb20a36f46602e688e075f5d9 (diff)
downloadlinux-14005ee270cad7078adbce6b7f3687b992a8334e.tar.xz
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>
Diffstat (limited to 'drivers/pinctrl/core.c')
-rw-r--r--drivers/pinctrl/core.c61
1 files changed, 61 insertions, 0 deletions
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)