Hi Ulf,
Am 11.11.19 um 18:27 schrieb Ulf Hansson:
> On Mon, 11 Nov 2019 at 15:13, Markus Reichl <m.reichl@xxxxxxxxxxxxx> wrote:
>>
>> Add SDR104 capability and regulators to SD card node.
>> While at it, fix a typo in lcd pinctrl and remove two
>> undocumented bindings from pmic.
>>
>> Signed-off-by: Markus Reichl <m.reichl@xxxxxxxxxxxxx>
>> ---
>> .../boot/dts/rockchip/rk3399-roc-pc.dtsi | 31 +++++++++++++++----
>> 1 file changed, 25 insertions(+), 6 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
>> index 33df95e384b4..e86a6db54499 100644
>> --- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
>> +++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
>> @@ -135,6 +135,20 @@
>> vin-supply = <&vcc_1v8>;
>> };
>>
>> + vcc3v0_sd: vcc3v0-sd {
>> + compatible = "regulator-fixed";
>> + enable-active-high;
>> + gpio = <&gpio4 RK_PD6 GPIO_ACTIVE_HIGH>;
>> + pinctrl-names = "default";
>> + pinctrl-0 = <&vcc3v0_sd_en>;
>> + regulator-name = "vcc3v0_sd";
>> + regulator-always-on;
>
> This looks odd. A GPIO regulator being always on?
This is a standard micro SD card socket that can also be used for
booting the board. I wanted to be cautious and start
working with it and several SD cards and explore the capabilities.
On this board nearly all regulators are still continously
switched on. I plan to remove the always-on properties step
by step from the regulators when the board runs stable with it's
components all enbled.
>
>> + regulator-boot-on;
>> + regulator-min-microvolt = <3000000>;
>> + regulator-max-microvolt = <3000000>;
>> + vin-supply = <&vcc3v3_sys>;
>> + };
>
> Assumes this powers an SDIO embedded card. Often those have a specific
> power sequence, just wanted to make sure the above are really
> sufficient? No delays or external clock needed?
It's not embedded, just a standard µSD plug. It is already enabled
by mainline U-Boot and ejecting and inserting the card works fine.
--
Gruß,
Markus
>
> [...]
>
> Kind regards
> Uffe
>
