linux-kernel - Re: [PATCH 3/3] ARM: dts: qcom: Add support for Samsung Galaxy Tab 4 10.1 LTE (SM-T535)

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Message-ID: <f74fb2da-bf01-479b-0bb6-9281f9948ec0@linaro.org>
Date:   Mon, 23 Jan 2023 17:50:03 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Stefan Hansson <newbyte@...tmarketos.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
        soc@...nel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        matti.lehtimaki@...il.com
Subject: Re: [PATCH 3/3] ARM: dts: qcom: Add support for Samsung Galaxy Tab 4
 10.1 LTE (SM-T535)



On 23.01.2023 17:48, Konrad Dybcio wrote:
> 
> 
> On 22.01.2023 15:47, Stefan Hansson wrote:
>> Add a device tree for the Samsung Galaxy Tab 4 10.1 (SM-T535) LTE tablet
>> based on the MSM8926 platform.
>>
>> Signed-off-by: Stefan Hansson <newbyte@...tmarketos.org>
>> ---
>>  arch/arm/boot/dts/Makefile                    |  1 +
>>  .../dts/qcom-msm8926-samsung-matisselte.dts   | 39 +++++++++++++++++++
>>  2 files changed, 40 insertions(+)
>>  create mode 100644 arch/arm/boot/dts/qcom-msm8926-samsung-matisselte.dts
>>
>> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>> index d0c07867aeab..e1fad9eb0d26 100644
>> --- a/arch/arm/boot/dts/Makefile
>> +++ b/arch/arm/boot/dts/Makefile
>> @@ -1061,6 +1061,7 @@ dtb-$(CONFIG_ARCH_QCOM) += \
>>  	qcom-msm8916-samsung-e7.dtb \
>>  	qcom-msm8916-samsung-grandmax.dtb \
>>  	qcom-msm8916-samsung-serranove.dtb \
>> +	qcom-msm8926-samsung-matisselte.dtb \
>>  	qcom-msm8960-cdp.dtb \
>>  	qcom-msm8974-lge-nexus5-hammerhead.dtb \
>>  	qcom-msm8974-sony-xperia-rhine-amami.dtb \
>> diff --git a/arch/arm/boot/dts/qcom-msm8926-samsung-matisselte.dts b/arch/arm/boot/dts/qcom-msm8926-samsung-matisselte.dts
>> new file mode 100644
>> index 000000000000..6df568f1f36d
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/qcom-msm8926-samsung-matisselte.dts
>> @@ -0,0 +1,39 @@
>> +// SPDX-License-Identifier: BSD-3-Clause
>> +/*
>> + * Copyright (c) 2022, Matti Lehtimäki <matti.lehtimaki@...il.com>
>> + * Copyright (c) 2023, Stefan Hansson <newbyte@...tmarketos.org>
>> + */
>> +
>> +/dts-v1/;
>> +
>> +#include "qcom-msm8226-samsung-matisse-common.dtsi"
>> +
>> +/ {
>> +	model = "Samsung Galaxy Tab 4 10.1 LTE";
>> +	compatible = "samsung,matisselte", "qcom,msm8926";
>> +	chassis-type = "tablet";
>> +};
>> +
>> +&pm8226_l3 {
>> +	regulator-min-microvolt = <750000>;
> This is identical as the common value.
> 
> 
>> +	regulator-max-microvolt = <1350000>;
>> +	regulator-always-on;
> This value already exists in common.
Nevermind, I misread the diff. That said, you can
commonize them.

Konrad
> 
>> +};
>> +
>> +&pm8226_s4 {
>> +	regulator-min-microvolt = <1800000>;
>> +	regulator-max-microvolt = <2200000>;
>> +};
>> +
>> +&reg_tsp_3p3v {
>> +		gpio = <&tlmm 32 GPIO_ACTIVE_HIGH>;
> The indentation here seems off.
> 
>> +};
>> +
>> +&sdhc_2 {
>> +	/* SD card fails to probe with error -110 */
> Maybe this SKU has some different pin properties or
> needs some external GPIO/regulator?
> 
> 
> Konrad
>> +	status = "disabled";
>> +};
>> +
>> +&tsp_en1_default_state {
>> +	pins = "gpio32";
>> +};