Hi Hans,
On 16/01/2015 09:17, Hans de Goede wrote:
> Hi,
>
> On 15-01-15 15:09, Gregory CLEMENT wrote:
>> Add the regulators to each SATA port.
>>
>> Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
>> ---
>> arch/arm/boot/dts/armada-388-gp.dts | 126 ++++++++++++++++++++++++++++++++++++
>> 1 file changed, 126 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/armada-388-gp.dts b/arch/arm/boot/dts/armada-388-gp.dts
>> index 4df22bf91683..590b383db323 100644
>> --- a/arch/arm/boot/dts/armada-388-gp.dts
>> +++ b/arch/arm/boot/dts/armada-388-gp.dts
>> @@ -173,6 +173,16 @@
>> status = "okay";
>> #address-cells = <1>;
>> #size-cells = <0>;
>> +
>> + sata0: sata-port@0 {
>> + reg = <0>;
>> + target-supply = <®_5v_sata0>;
>> + };
>> +
>> + sata1: sata-port@1 {
>> + reg = <1>;
>> + target-supply = <®_5v_sata1>;
>> + };
>> };
>>
>> sata@e0000 {
>> @@ -181,6 +191,16 @@
>> status = "okay";
>> #address-cells = <1>;
>> #size-cells = <0>;
>> +
>> + sata2: sata-port@0 {
>> + reg = <0>;
>> + target-supply = <®_5v_sata2>;
>> + };
>> +
>> + sata3: sata-port@1 {
>> + reg = <1>;
>> + target-supply = <®_5v_sata3>;
>> + };
>> };
>>
>> sdhci@d8000 {
>> @@ -278,6 +298,112 @@
>> regulator-always-on;
>> gpio = <&expander0 4 GPIO_ACTIVE_HIGH>;
>> };
>> +
>> + reg_sata0: pwr-sata0 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "pwr_en_sata0";
>> + enable-active-high;
>> + regulator-always-on;
>> +
>> + };
>> +
>> + reg_5v_sata0: v5-sata0 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "v5.0-sata0";
>> + regulator-min-microvolt = <5000000>;
>> + regulator-max-microvolt = <5000000>;
>> + regulator-always-on;
>> + vin-supply = <®_sata0>;
>> + };
>> +
>> + reg_12v_sata0: v12-sata0 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "v12.0-sata0";
>> + regulator-min-microvolt = <12000000>;
>> + regulator-max-microvolt = <12000000>;
>> + regulator-always-on;
>> + vin-supply = <®_sata0>;
>> + };
>
> AFAIK the separate v5 / 12v regulators you're creating here
> are not used anywhere. So I guess there just here to
> accurately / completely describe the power topology ?
Yes it was the point.
>
>> +
>> + reg_sata1: pwr-sata1 {
>> + regulator-name = "pwr_en_sata1";
>> + compatible = "regulator-fixed";
>> + regulator-min-microvolt = <12000000>;
>> + regulator-max-microvolt = <12000000>;
>> + enable-active-high;
>> + regulator-always-on;
>
>
> The always on here seems to a bit weird, wasn't the
> whole purpose of this patch set to teach ahci_platform
> to turn it on as needed ?
Maybe I misunderstood the regulator binding, but I thought
that (once the suspend will be available on this platform) I
could use:
regulator-state-mem {
regulator-off-in-suspend;
};
>
> You do probably want to put a regulator-boot-on here so
> that disks do not get an unwanted powercycle (bad for
> their lifetime) when the firmware has already turned on
> the disk. Downside of using regulator-boot-on is that if
> the power is not actually turned on no power-on-delay is
That's why I didn't use it
> done, but we're not using a power on delay anyways.
But if regulator-always-on prevent to switch it off in
suspend then yes using regulator-boot-on is better.
Thanks,
Gregory
>
> The same goes for reg_sata2 & reg_sata3.
>
>> + gpio = <&expander0 3 GPIO_ACTIVE_HIGH>;
>> + };
>> +
>> + reg_5v_sata1: v5-sata1 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "v5.0-sata1";
>> + regulator-min-microvolt = <5000000>;
>> + regulator-max-microvolt = <5000000>;
>> + regulator-always-on;
>> + vin-supply = <®_sata1>;
>> + };
>> +
>> + reg_12v_sata1: v12-sata1 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "v12.0-sata1";
>> + regulator-min-microvolt = <12000000>;
>> + regulator-max-microvolt = <12000000>;
>> + regulator-always-on;
>> + vin-supply = <®_sata1>;
>> + };
>> +
>> + reg_sata2: pwr-sata2 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "pwr_en_sata2";
>> + enable-active-high;
>> + regulator-always-on;
>> + gpio = <&expander0 11 GPIO_ACTIVE_HIGH>;
>> + };
>> +
>> + reg_5v_sata2: v5-sata2 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "v5.0-sata2";
>> + regulator-min-microvolt = <5000000>;
>> + regulator-max-microvolt = <5000000>;
>> + regulator-always-on;
>> + vin-supply = <®_sata2>;
>> + };
>> +
>> + reg_12v_sata2: v12-sata2 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "v12.0-sata2";
>> + regulator-min-microvolt = <12000000>;
>> + regulator-max-microvolt = <12000000>;
>> + regulator-always-on;
>> + vin-supply = <®_sata2>;
>> + };
>> +
>> + reg_sata3: pwr-sata3 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "pwr_en_sata3";
>> + enable-active-high;
>> + regulator-always-on;
>> + gpio = <&expander0 12 GPIO_ACTIVE_HIGH>;
>> + };
>> +
>> + reg_5v_sata3: v5-sata3 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "v5.0-sata3";
>> + regulator-min-microvolt = <5000000>;
>> + regulator-max-microvolt = <5000000>;
>> + regulator-always-on;
>> + vin-supply = <®_sata3>;
>> + };
>> +
>> + reg_12v_sata3: v12-sata3 {
>> + compatible = "regulator-fixed";
>> + regulator-name = "v12.0-sata3";
>> + regulator-min-microvolt = <12000000>;
>> + regulator-max-microvolt = <12000000>;
>> + regulator-always-on;
>> + vin-supply = <®_sata3>;
>> + };
>> };
>>
>> &pinctrl {
>>
>
> Regards,
>
> Hans
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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