regulator: Allow regulators to set the initial operating mode
This is useful when wishing to run in a fixed operating mode that isn't
the default.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index d55a25a..75abcd8 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -724,6 +724,23 @@
}
}
+ if (constraints->initial_mode) {
+ if (!ops->set_mode) {
+ printk(KERN_ERR "%s: no set_mode operation for %s\n",
+ __func__, name);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = ops->set_mode(rdev, constraints->initial_mode);
+ if (ret < 0) {
+ printk(KERN_ERR
+ "%s: failed to set initial mode for %s: %d\n",
+ __func__, name, ret);
+ goto out;
+ }
+ }
+
/* if always_on is set then turn the regulator on if it's not
* already on. */
if (constraints->always_on && ops->enable &&
diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h
index 5aa00ee..1eb861c 100644
--- a/include/linux/regulator/machine.h
+++ b/include/linux/regulator/machine.h
@@ -83,6 +83,7 @@
* @state_standby: State for regulator when system is suspended in standby
* mode.
* @initial_state: Suspend state to set by default.
+ * @initial_mode: Mode to set at startup.
*/
struct regulation_constraints {
@@ -111,6 +112,9 @@
struct regulator_state state_standby;
suspend_state_t initial_state; /* suspend state to set at init */
+ /* mode to set on startup */
+ unsigned int initial_mode;
+
/* constriant flags */
unsigned always_on:1; /* regulator never off when system is on */
unsigned boot_on:1; /* bootloader/firmware enabled regulator */