The regulator-fixed driver is possible to be off by firmware like PSCI while the system is suspended. If a consumer could get such a condition from regulator_is_enabled(), it's useful by consumers.
So, add some regulator_ops members for it. And then, if regulator-fixed nodes have suitable sub-nodes and properties [1], regulator_is_enabled() will return false while suspend() of a consumer. [1] - The node has regulator-state-(standby|mem|disk) sub-nodes. - The node doesn't have regulator-always-on. - The sub-node has regulator-off-in-suspend property. Signed-off-by: Yoshihiro Shimoda <[email protected]> --- drivers/regulator/fixed.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c index d54830e..0bd4a1a 100644 --- a/drivers/regulator/fixed.c +++ b/drivers/regulator/fixed.c @@ -35,6 +35,7 @@ struct fixed_voltage_data { struct clk *enable_clock; unsigned int clk_enable_counter; + bool disabled_in_suspend; }; struct fixed_dev_type { @@ -49,6 +50,31 @@ static const struct fixed_dev_type fixed_clkenable_data = { .has_enable_clock = true, }; +static int reg_is_enabled(struct regulator_dev *rdev) +{ + struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); + + return !priv->disabled_in_suspend; +} + +static int reg_prepare_disable(struct regulator_dev *rdev) +{ + struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); + + priv->disabled_in_suspend = true; + + return 0; +} + +static int reg_resume_early_disable(struct regulator_dev *rdev) +{ + struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); + + priv->disabled_in_suspend = false; + + return 0; +} + static int reg_clock_enable(struct regulator_dev *rdev) { struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); @@ -132,6 +158,9 @@ of_get_fixed_voltage_config(struct device *dev, } static struct regulator_ops fixed_voltage_ops = { + .is_enabled = reg_is_enabled, + .set_prepare_disable = reg_prepare_disable, + .clear_resume_early_disable = reg_resume_early_disable, }; static struct regulator_ops fixed_voltage_clkenabled_ops = { -- 2.7.4
