linux-kernel - Re: [PATCH v4 4/4] arm64: dts: qcom: sm6125: Initial support for xiaomi-laurel-sprout

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Date:   Sat, 17 Dec 2022 15:23:37 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Lux Aliaga <they@...t.lgbt>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Kees Cook <keescook@...omium.org>,
        Tony Luck <tony.luck@...el.com>,
        "Guilherme G. Piccoli" <gpiccoli@...lia.com>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v4 4/4] arm64: dts: qcom: sm6125: Initial support for
 xiaomi-laurel-sprout



On 16.12.2022 21:27, Lux Aliaga wrote:
> 
> On 16/12/2022 08:32, Konrad Dybcio wrote:
>>
>> On 15.12.2022 20:04, Lux Aliaga wrote:
>>> Adds support for the Xiaomi Mi A3 (xiaomi-laurel-sprout). Here's a
>>> summary on what's working.
>>>
>>> - dmesg output to bootloader preconfigured display
>>> - USB
>>> - UFS
>>> - SMD RPM regulators
>>>
>>> Signed-off-by: Lux Aliaga <they@...t.lgbt>
>>> ---
>>>   arch/arm64/boot/dts/qcom/Makefile             |   1 +
>>>   .../dts/qcom/sm6125-xiaomi-laurel-sprout.dts  | 254 ++++++++++++++++++
>>>   2 files changed, 255 insertions(+)
>>>   create mode 100644 arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
>>> index 3e79496292e7..2b2a0170db14 100644
>>> --- a/arch/arm64/boot/dts/qcom/Makefile
>>> +++ b/arch/arm64/boot/dts/qcom/Makefile
>>> @@ -157,6 +157,7 @@ dtb-$(CONFIG_ARCH_QCOM)    += sdm850-lenovo-yoga-c630.dtb
>>>   dtb-$(CONFIG_ARCH_QCOM)    += sdm850-samsung-w737.dtb
>>>   dtb-$(CONFIG_ARCH_QCOM)    += sm4250-oneplus-billie2.dtb
>>>   dtb-$(CONFIG_ARCH_QCOM)    += sm6125-sony-xperia-seine-pdx201.dtb
>>> +dtb-$(CONFIG_ARCH_QCOM)    += sm6125-xiaomi-laurel-sprout.dtb
>>>   dtb-$(CONFIG_ARCH_QCOM)    += sm6350-sony-xperia-lena-pdx213.dtb
>>>   dtb-$(CONFIG_ARCH_QCOM)    += sm6375-sony-xperia-murray-pdx225.dtb
>>>   dtb-$(CONFIG_ARCH_QCOM)    += sm7225-fairphone-fp4.dtb
>>> diff --git a/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts b/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts
>>> new file mode 100644
>>> index 000000000000..86e1ec47bf5e
>>> --- /dev/null
>>> +++ b/arch/arm64/boot/dts/qcom/sm6125-xiaomi-laurel-sprout.dts
>>> @@ -0,0 +1,254 @@
>>> +// SPDX-License-Identifier: BSD-3-Clause
>>> +/*
>>> + * Copyright (c) 2022, Lux Aliaga <they@...t.lgbt>
>>> + */
>>> +
>>> +/dts-v1/;
>>> +
>>> +#include <dt-bindings/gpio/gpio.h>
>>> +#include <dt-bindings/input/input.h>
>>> +#include <dt-bindings/input/gpio-keys.h>
>>> +#include "sm6125.dtsi"
>>> +
>>> +/ {
>>> +    model = "Xiaomi Mi A3";
>>> +    compatible = "xiaomi,laurel-sprout", "qcom,sm6125";
>>> +    chassis-type = "handset";
>>> +
>>> +    /* required for bootloader to select correct board */
>>> +    qcom,msm-id = <394 0>; /* sm6125 v0 */
>> Unless you have a prototype device, this is not correct.
>>
>> Please run `cat /sys/bus/soc/devices/soc0/revision` and confirm
>> which revision is used on your phone.
> This segment has already been cross-referenced from downstream, and the device boots up successfully when using this ID, unless you're referring to the comment next to it, in which case I can recheck later, since currently I'm away from my device.
The device boots fine, because the DTB selection works on a "best match"
basis. If it can't find one for the exact version of the SoC, it may
try to boot the closest one.

Konrad
>