linux-kernel - Re: [PATCH 5/5] arm64: dts: imx93: update gpio node

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Date:   Thu, 14 Sep 2023 08:31:54 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Peng Fan <peng.fan@....com>,
        "Peng Fan (OSS)" <peng.fan@....nxp.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Shevchenko <andy@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Stefan Agner <stefan@...er.ch>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>
Cc:     "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 5/5] arm64: dts: imx93: update gpio node

On 14/09/2023 08:04, Peng Fan wrote:
>> Subject: Re: [PATCH 5/5] arm64: dts: imx93: update gpio node
>>
>> On 14/09/2023 04:21, Peng Fan (OSS) wrote:
>>> From: Peng Fan <peng.fan@....com>
>>>
>>> Per binding doc, i.MX93 GPIO supports two interrupts, and not
>>> compatible with i.MX7ULP. So update the node
>>>
>>> Signed-off-by: Peng Fan <peng.fan@....com>
>>> ---
>>>  arch/arm64/boot/dts/freescale/imx93.dtsi | 20 ++++++++++++--------
>>>  1 file changed, 12 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/arch/arm64/boot/dts/freescale/imx93.dtsi
>>> b/arch/arm64/boot/dts/freescale/imx93.dtsi
>>> index 6f85a05ee7e1..011c34a57c53 100644
>>> --- a/arch/arm64/boot/dts/freescale/imx93.dtsi
>>> +++ b/arch/arm64/boot/dts/freescale/imx93.dtsi
>>> @@ -825,11 +825,12 @@ usdhc3: mmc@...b0000 {
>>>  		};
>>>
>>>  		gpio2: gpio@...10080 {
>>> -			compatible = "fsl,imx93-gpio", "fsl,imx7ulp-gpio";
>>> +			compatible = "fsl,imx93-gpio", "fsl,imx8ulp-gpio";
>>
>> As your driver change points, it is breaking users, so no :(
> 
> ok. Although i.MX93 GPIO is not compatible with i.MX7ULP from HW
> perspective, the compatible string should keep as it is now and binding

If it is not compatible, then how could it work before?



Best regards,
Krzysztof