Hi Heiko:
On 2016?01?14? 20:41, Heiko Stuebner wrote:
> Hi Andy,
>
> Am Donnerstag, 14. Januar 2016, 20:35:56 schrieb Andy Yan:
>> Rayeager board use pwm3 modulate the vdd_logic voltage, so enable it.
>>
>> Signed-off-by: Andy Yan <andy.yan at rock-chips.com>
>> ---
>>
>> arch/arm/boot/dts/rk3066a-rayeager.dts | 16 ++++++++++++++++
>> 1 file changed, 16 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/rk3066a-rayeager.dts
>> b/arch/arm/boot/dts/rk3066a-rayeager.dts index 3d4c104..d17a5b8 100644
>> --- a/arch/arm/boot/dts/rk3066a-rayeager.dts
>> +++ b/arch/arm/boot/dts/rk3066a-rayeager.dts
>> @@ -78,6 +78,18 @@
>> };
>> };
>>
>> + pwm_regulator: pwm-regulator {
>> + compatible = "pwm-regulator";
>> + pwms = <&pwm3 0 1000>;
>> + regulator-name = "vdd_logic";
>> + regulator-min-microvolt = <1200000>;
>> + regulator-max-microvolt = <1200000>;
> I guess this is to make sure it stays at 1.2V at all times, or is the min-
> microvolt settings supposed to be lower?
>
>
> Thanks
> Heiko
>
>
>
Yes, I want to fix it at 1.2V. When I read the regulator_register
function, I found it call regulator_do_set_voltate only when min=max.
So I set it like what you see.
regulator_register--->
set_machine_constrains--->
machine_constrains_voltage-->
