Message-ID: <675ed9f7-da31-6206-5089-1db22025ef4b@linaro.org>
Date:   Tue, 24 Jan 2023 10:46:57 +0100
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Subject: Re: [PATCH 6/7] arm64: dts: Add ipq9574 SoC and AL02 board support
To:     Devi Priya <quic_devipriy@quicinc.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        agross@kernel.org, andersson@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, mturquette@baylibre.com,
        sboyd@kernel.org, linus.walleij@linaro.org,
        catalin.marinas@arm.com, will@kernel.org, p.zabel@pengutronix.de,
        shawnguo@kernel.org, arnd@arndb.de, marcel.ziswiler@toradex.com,
        dmitry.baryshkov@linaro.org, nfraprado@collabora.com,
        broonie@kernel.org, tdas@codeaurora.org,
        linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
        linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc:     quic_srichara@quicinc.com, quic_gokulsri@quicinc.com,
        quic_sjaganat@quicinc.com, quic_kathirav@quicinc.com,
        quic_arajkuma@quicinc.com, quic_anusha@quicinc.com,
        quic_poovendh@quicinc.com
References: <20230110121316.24892-1-quic_devipriy@quicinc.com>
 <20230110121316.24892-7-quic_devipriy@quicinc.com>
 <f6ef1834-b629-b76c-9cde-55af56320665@linaro.org>
 <7f157b73-f856-04d2-1b39-e1f8861d0439@quicinc.com>
 <84aa79c3-b793-0d0e-d6a5-035aff5a17b4@linaro.org>
 <278a2e6e-69e0-81b0-f476-571edea950ff@quicinc.com>
Content-Language: en-US
From:   Konrad Dybcio <konrad.dybcio@linaro.org>
In-Reply-To: <278a2e6e-69e0-81b0-f476-571edea950ff@quicinc.com>
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On 24.01.2023 08:19, Devi Priya wrote:
> 
> 
> On 1/13/2023 7:50 PM, Krzysztof Kozlowski wrote:
>> On 13/01/2023 14:29, Devi Priya wrote:
>>>>> +
>>>>> +    soc: soc@0 {
>>>>> +        #address-cells = <1>;
>>>>> +        #size-cells = <1>;
>>>>> +        ranges = <0 0 0 0xffffffff>;
>>>>> +        compatible = "simple-bus";
>>>>> +
>>>>> +        tlmm: pinctrl@1000000 {
>>>>> +            compatible = "qcom,ipq9574-tlmm";
>>>>> +            reg = <0x01000000 0x300000>;
>>>>> +            interrupts = <GIC_SPI 208 IRQ_TYPE_LEVEL_HIGH>;
>>>>> +            gpio-controller;
>>>>> +            #gpio-cells = <2>;
>>>>> +            gpio-ranges = <&tlmm 0 0 65>;
>>>>> +            gpio-reserved-ranges = <59 1>;
>>>>
>>>> Hm, why reserved ranges are in SoC?
>>> As the gpio is forbidden on all ipq9574 boards, we have added it in SoC
>>
>> Why it is forbidden on all boards? I guess it depends on the firmware
>> and this can differ, can't it?
>>
> This GPIO is protected and used by the TZ firmware and is forbidden on all the boards & firmware
If it's protected on *all* boards and *all* firmwares (for any
good reason that you probably have internally), perhaps it
would be better to describe it in the .c driver.. wdyt?

Konrad
>> Best regards,
>> Krzysztof
>>
> Regards,
> Devi Priya