From: Stephan Gerhold stephan.gerhold@kernkonzept.com
[ Upstream commit e8977917e116d1571dacb8e9864474551c1c12bd ]
The PM8916 device specification [1] documents a programmable range of 1.75V to 3.337V with 12.5mV steps for the PMOS LDOs in PM8916. This range is also used when controlling the regulator directly using the qcom_spmi-regulator driver ("ult_pldo" there).
However, for some reason the qcom_smd-regulator driver allows a much larger range for the same hardware component. This could be simply a typo, since the start of the range is essentially just missing a '1'.
In practice this does not cause any major problems, since the driver just sends the actual voltage to the RPM firmware instead of making use of the incorrect voltage selector. Still, having the wrong range there is confusing and prevents the regulator core from validating requests correctly.
[1]: https://developer.qualcomm.com/download/sd410/pm8916pm8916-1-power-managemen...
Fixes: 57d6567680ed ("regulator: qcom-smd: Add PM8916 support") Signed-off-by: Stephan Gerhold stephan.gerhold@kernkonzept.com Link: https://lore.kernel.org/r/20220623094614.1410180-2-stephan.gerhold@kernkonze... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/regulator/qcom_smd-regulator.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/regulator/qcom_smd-regulator.c b/drivers/regulator/qcom_smd-regulator.c index 7dff94a2eb7e..0af8286e1b10 100644 --- a/drivers/regulator/qcom_smd-regulator.c +++ b/drivers/regulator/qcom_smd-regulator.c @@ -357,10 +357,10 @@ static const struct regulator_desc pm8941_switch = {
static const struct regulator_desc pm8916_pldo = { .linear_ranges = (struct linear_range[]) { - REGULATOR_LINEAR_RANGE(750000, 0, 208, 12500), + REGULATOR_LINEAR_RANGE(1750000, 0, 127, 12500), }, .n_linear_ranges = 1, - .n_voltages = 209, + .n_voltages = 128, .ops = &rpm_smps_ldo_ops, };