Re: [PATCH 3/7] regulator: qcom-rpmh: Correct the pmic5_hfsmps515 buck

skakit
2021-02-26T07:00:30Z

Hi,

On 2021-02-25 16:39, Dmitry Baryshkov wrote:
> On 24/02/2021 11:33, satya priya wrote:
>> Correct the REGULATOR_LINEAR_RANGE and n_voltges for
>> pmic5_hfsmps515 buck.
>>
>> Signed-off-by: satya priya <skakit@codeaurora.org>
>> ---
>> drivers/regulator/qcom-rpmh-regulator.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/regulator/qcom-rpmh-regulator.c
>> b/drivers/regulator/qcom-rpmh-regulator.c
>> index 79a554f..36542c3 100644
>> --- a/drivers/regulator/qcom-rpmh-regulator.c
>> +++ b/drivers/regulator/qcom-rpmh-regulator.c
>> @@ -726,8 +726,8 @@ static const struct rpmh_vreg_hw_data
>> pmic5_ftsmps510 = {
>> static const struct rpmh_vreg_hw_data pmic5_hfsmps515 = {
>> .regulator_type = VRM,
>> .ops = &rpmh_regulator_vrm_ops,
>> - .voltage_range = REGULATOR_LINEAR_RANGE(2800000, 0, 4, 16000),
>> - .n_voltages = 5,
>> + .voltage_range = REGULATOR_LINEAR_RANGE(320000, 0, 235, 16000),
>> + .n_voltages = 236,
>
> I've checked the docs for pm8009, the chip which also uses hfsmps515
> regulators. The pdf clearly states that the 'Output voltage operating
> range' is from 2.8 V to 2.85 V.
>
> So we'd probably need to define different versions of HFS515 regulator
> data (like I had to create for pm8009-1).
>
>

The min-max voltages for S1C (PM8350c) regulator are 2190000-2210000uV
for sc7280(kodiak), so we had to modify this buck to support this
regulator.

AFAIK, this struct defines the HW constraints of a regulator, but the
platform specific min-max values can be controlled from DT files. So,
can't we modify it like above instead of adding a new definition? the
new min_uV value (32000) is anyway not exceeding the old value (2800000)
right? please correct me if wrong.

>> .pmic_mode_map = pmic_mode_map_pmic5_smps,
>> .of_map_mode = rpmh_regulator_pmic4_smps_of_map_mode,
>> };
>>

Thanks,
Satya Priya