linux-kernel - Re: [PATCH 10/10] ARM: dts: bcm2711: Add vmmc regulator in emmc2

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Date:   Fri, 6 Mar 2020 11:35:43 +0000
From:   Phil Elwell <phil@...pberrypi.com>
To:     Stefan Wahren <stefan.wahren@...e.com>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        devicetree@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-mmc@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>
Cc:     ulf.hansson@...aro.org, f.fainelli@...il.com, phil@...pberrypi.org,
        adrian.hunter@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/10] ARM: dts: bcm2711: Add vmmc regulator in emmc2

Nicolas, Stefan,

On 06/03/2020 11:07, Stefan Wahren wrote:
> Hi Nicolas,
> 
> On 06.03.20 11:38, Nicolas Saenz Julienne wrote:
>> The SD card power can be controlled trough a pin routed into the board's
>> external GPIO expander. Turn that into a regulator and provide it to
>> emmc2.
>>
>> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
>> ---
>>   arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 11 +++++++++++
>>   1 file changed, 11 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
>> index e26ea9006378..8e98e917f9f4 100644
>> --- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
>> +++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
>> @@ -56,6 +56,16 @@ sd_io_1v8_reg: sd_io_1v8_reg {
>>   			  3300000 0x0>;
>>   		status = "okay";
>>   	};
>> +
>> +	sd_vcc_reg: sd_vcc_reg {
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "vcc-sd";
>> +		regulator-min-microvolt = <3300000>;
>> +		regulator-max-microvolt = <3300000>;
>> +		regulator-boot-on;
>> +		enable-active-high;
>> +		gpio = <&expgpio 6 GPIO_ACTIVE_HIGH>;
> this new GPIO has an empty GPIO label, please add it.

The correct name would be "SD_PWR_ON".

>> +	};
>>   };
>>   
>>   &firmware {
>> @@ -174,6 +184,7 @@ brcmf: wifi@1 {
>>   /* EMMC2 is used to drive the SD card */
>>   &emmc2 {
>>   	vqmmc-supply = <&sd_io_1v8_reg>;
>> +	vmmc-supply = <&sd_vcc_reg>;
>>   	broken-cd;
>>   	status = "okay";
>>   };