linux-kernel - Re: [PATCH 6/7] arm64: dts: Add ipq9574 SoC and AL02 board support

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Message-ID: <278a2e6e-69e0-81b0-f476-571edea950ff@quicinc.com>
Date:   Tue, 24 Jan 2023 12:49:53 +0530
From:   Devi Priya <quic_devipriy@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <agross@...nel.org>, <andersson@...nel.org>,
        <konrad.dybcio@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <linus.walleij@...aro.org>,
        <catalin.marinas@....com>, <will@...nel.org>,
        <p.zabel@...gutronix.de>, <shawnguo@...nel.org>, <arnd@...db.de>,
        <marcel.ziswiler@...adex.com>, <dmitry.baryshkov@...aro.org>,
        <nfraprado@...labora.com>, <broonie@...nel.org>,
        <tdas@...eaurora.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <quic_srichara@...cinc.com>, <quic_gokulsri@...cinc.com>,
        <quic_sjaganat@...cinc.com>, <quic_kathirav@...cinc.com>,
        <quic_arajkuma@...cinc.com>, <quic_anusha@...cinc.com>,
        <quic_poovendh@...cinc.com>
Subject: Re: [PATCH 6/7] arm64: dts: Add ipq9574 SoC and AL02 board support



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@...0000 {
>>>> +			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
> Best regards,
> Krzysztof
> 
Regards,
Devi Priya