linux-kernel - Re: [PATCH v2 1/2] dt-bindings: mtd: spi-nor: Add reset-gpios property

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Message-ID: <83444851-14ef-b293-6581-1307331fb1c4@linaro.org>
Date:   Thu, 1 Sep 2022 13:28:07 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     "Potthuri, Sai Krishna" <sai.krishna.potthuri@....com>,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Pratyush Yadav <pratyush@...nel.org>,
        Michael Walle <michael@...le.cc>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "saikrishna12468@...il.com" <saikrishna12468@...il.com>,
        "git (AMD-Xilinx)" <git@....com>
Subject: Re: [PATCH v2 1/2] dt-bindings: mtd: spi-nor: Add reset-gpios
 property

On 01/09/2022 13:18, Potthuri, Sai Krishna wrote:
> Hi Krzysztof,
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>> Sent: Thursday, September 1, 2022 1:26 PM
>> To: Potthuri, Sai Krishna <sai.krishna.potthuri@....com>; Tudor Ambarus
>> <tudor.ambarus@...rochip.com>; Pratyush Yadav <pratyush@...nel.org>;
>> Michael Walle <michael@...le.cc>; Miquel Raynal
>> <miquel.raynal@...tlin.com>; Richard Weinberger <richard@....at>;
>> Vignesh Raghavendra <vigneshr@...com>; Rob Herring
>> <robh+dt@...nel.org>; Krzysztof Kozlowski
>> <krzysztof.kozlowski+dt@...aro.org>
>> Cc: devicetree@...r.kernel.org; linux-mtd@...ts.infradead.org; linux-
>> kernel@...r.kernel.org; saikrishna12468@...il.com; git (AMD-Xilinx)
>> <git@....com>
>> Subject: Re: [PATCH v2 1/2] dt-bindings: mtd: spi-nor: Add reset-gpios
>> property
>>
>> On 01/09/2022 10:29, Sai Krishna Potthuri wrote:
>>> SPI-NOR flashes have RESET pin which can be toggled using GPIO
>>> controller, for those platforms reset-gpios property can be used to
>>> reset the flash device.
>>>
>>> Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@....com>
>>> ---
>>
>> You still miss the user (DTS) of this change...
> Do you mean to have this property in example DTS in this yaml?

No, I want to see in-tree DTS using it.

> 
>> The JEDEC spec did not mention
>> a reset pin. Can you provide the user?
> Xilinx Octal SPI (cdns,qspi-nor.yaml) is using this reset pin to reset the
> flash device on Versal platform.> Do you want me to update the example dts in cdns,qspi-nor.yaml file
> to reflect this property in this patch?
> 


Best regards,
Krzysztof