diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-03-02 17:32:46 +0100 |
|---|---|---|
| committer | Liam Girdwood <lrg@slimlogic.co.uk> | 2009-03-31 10:56:27 +0200 |
| commit | cacf90f24e80cec9334f98e0377149f943fe9f16 (patch) | |
| tree | b492ea92394f9ba2accffa478bdadc50008998fb | |
| parent | regulator: Implement list_voltage for WM835x LDOs and DCDCs (diff) | |
| download | linux-cacf90f24e80cec9334f98e0377149f943fe9f16.tar.xz linux-cacf90f24e80cec9334f98e0377149f943fe9f16.zip | |
regulator: Allow boot_on regulators to be disabled by clients
Rather than incrementing the reference count for boot_on regulators
(which prevents them being disabled later on) simply force the
regulator to be enabled when applying the constraints. Previously
boot_on was essentially equivalent to always_on.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
| -rw-r--r-- | drivers/regulator/core.c | 13 | ||||
| -rw-r--r-- | include/linux/regulator/machine.h | 4 |
2 files changed, 7 insertions, 10 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 2ff76349f392..08441e24946e 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -776,10 +776,6 @@ static int set_machine_constraints(struct regulator_dev *rdev, } } - /* are we enabled at boot time by firmware / bootloader */ - if (rdev->constraints->boot_on) - rdev->use_count = 1; - /* do we need to setup our suspend state */ if (constraints->initial_state) { ret = suspend_prepare(rdev, constraints->initial_state); @@ -808,11 +804,10 @@ static int set_machine_constraints(struct regulator_dev *rdev, } } - /* if always_on is set then turn the regulator on if it's not - * already on. */ - if (constraints->always_on && ops->enable && - ((ops->is_enabled && !ops->is_enabled(rdev)) || - (!ops->is_enabled && !constraints->boot_on))) { + /* If the constraints say the regulator should be on at this point + * and we have control then make sure it is enabled. + */ + if ((constraints->always_on || constraints->boot_on) && ops->enable) { ret = ops->enable(rdev); if (ret < 0) { printk(KERN_ERR "%s: failed to enable %s\n", diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h index 1eb861cf4b2c..5de7aa3b02a6 100644 --- a/include/linux/regulator/machine.h +++ b/include/linux/regulator/machine.h @@ -73,7 +73,9 @@ struct regulator_state { * * @always_on: Set if the regulator should never be disabled. * @boot_on: Set if the regulator is enabled when the system is initially - * started. + * started. If the regulator is not enabled by the hardware or + * bootloader then it will be enabled when the constraints are + * applied. * @apply_uV: Apply the voltage constraint when initialising. * * @input_uV: Input voltage for regulator when supplied by another regulator. |