Messages in this thread Patch in this message | | | From | Javier Martinez Canillas <> | Subject | [RFC 1/5] regulator: core: Get voltage from parent if not available | Date | Tue, 29 Jul 2014 18:28:55 +0200 |
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Load switches are modeled as regulators but they just provide the voltage of their parent input supply. So the drivers for these switches usually don't provide a .get_voltage function handler but there is code in the kernel that assumes that all regulators should be able to provide its current voltage rail.
So, if the output voltage for a regulator is not available and it has a parent supply, then pass the voltage of its parent.
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> --- drivers/regulator/core.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 69c9c08..089cea8 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2695,6 +2695,8 @@ static int _regulator_get_voltage(struct regulator_dev *rdev) ret = rdev->desc->ops->list_voltage(rdev, 0); } else if (rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1)) { ret = rdev->desc->fixed_uV; + } else if (rdev->supply) { + ret = regulator_get_voltage(rdev->supply); } else { return -EINVAL; } -- 2.0.0.rc2
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