linux-hardening - Re: [PATCH 4/6] arm64: dts: qcom: sm6125-xiaomi-ginkgo: Fix reserved gpio ranges

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Message-ID: <9662c03b-a012-4b3c-8061-62f71a3f44a6@oss.qualcomm.com>
Date: Tue, 13 Jan 2026 10:12:47 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: barnabas.czeman@...nlining.org
Cc: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Gabriel Gonzales <semfault@...root.org>, Kees Cook <kees@...nel.org>,
        Tony Luck <tony.luck@...el.com>,
        "Guilherme G. Piccoli" <gpiccoli@...lia.com>,
        Biswapriyo Nath <nathbappai@...il.com>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hardening@...r.kernel.org, phone-devel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, linux@...nlining.org
Subject: Re: [PATCH 4/6] arm64: dts: qcom: sm6125-xiaomi-ginkgo: Fix reserved
 gpio ranges

On 1/13/26 10:08 AM, barnabas.czeman@...nlining.org wrote:
> On 2026-01-13 10:01, Konrad Dybcio wrote:
>> On 1/12/26 9:13 PM, Barnabás Czémán wrote:
>>> The device was crashing on boot because the reserved gpio ranges
>>> was wrongly defined. Correct the ranges for avoid pinctrl crashing.
>>>
>>> Fixes: 9b1a6c925c88 ("arm64: dts: qcom: sm6125: Initial support for xiaomi-ginkgo")
>>> Signed-off-by: Barnabás Czémán <barnabas.czeman@...nlining.org>
>>> ---
>>
>> That's odd.. were you able to confirm that these values are alright for
>> both the Note 8 and the 8T?
> Yes, it was tested on both devices. The original devicetree was never boot.

Fun..

>>
>>>  arch/arm64/boot/dts/qcom/sm6125-xiaomi-ginkgo.dts | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/sm6125-xiaomi-ginkgo.dts b/arch/arm64/boot/dts/qcom/sm6125-xiaomi-ginkgo.dts
>>> index 666daf4a9fdd..163ecdc7fd6c 100644
>>> --- a/arch/arm64/boot/dts/qcom/sm6125-xiaomi-ginkgo.dts
>>> +++ b/arch/arm64/boot/dts/qcom/sm6125-xiaomi-ginkgo.dts
>>> @@ -296,7 +296,7 @@ &sdhc_2 {
>>>  };
>>>
>>>  &tlmm {
>>> -    gpio-reserved-ranges = <22 2>, <28 6>;
>>> +    gpio-reserved-ranges = <0 4>, <30 4>;
>>
>> Any chance you know/could deduce what they're connected to and describe
>> it, like in x1-crd.dtsi?
> https://github.com/MiCode/Xiaomi_Kernel_OpenSource/blob/willow-p-oss/drivers/pinctrl/qcom/pinctrl-msm.c#L605
> https://github.com/MiCode/Xiaomi_Kernel_OpenSource/blob/ginkgo-p-oss/drivers/pinctrl/qcom/pinctrl-msm.c#L610

GPIO0-3 sounds like QUP0 and GPIO30-33 sounds like QUP6

My guess would be one goes to a fingerprint scanner and one goes to
NFC eSE (or N/C for the device without NFC)

Could you scan the downstream devicetree for signals of that?

Konrad