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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>
This commit is contained in:
Mark Brown 2009-02-26 19:24:19 +00:00 committed by Liam Girdwood
parent fe203ddfa5
commit a308466c24
2 changed files with 21 additions and 0 deletions
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17
drivers/regulator/core.c
View File

@ -724,6 +724,23 @@ static int set_machine_constraints(struct regulator_dev *rdev,
}
}
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 &&

4
include/linux/regulator/machine.h
View File

@ -83,6 +83,7 @@ struct regulator_state {
* @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 regulation_constraints {
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 */