linux-kernel - Re: [PATCH 11/11] arm64: dts: Add Pensando Elba SoC support

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Date:   Thu, 26 May 2022 08:53:54 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Brad Larson <brad@...sando.io>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Mark Brown <broonie@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Olof Johansson <olof@...om.net>,
        David Clear <dac2@...sando.io>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 11/11] arm64: dts: Add Pensando Elba SoC support

On 26/05/2022 02:19, Brad Larson wrote:
> Hi Krzysztof,
> 
> On Thu, Apr 7, 2022 at 12:06 PM Krzysztof Kozlowski
> <krzysztof.kozlowski@...aro.org> wrote:
>>
>> On 07/04/2022 01:36, Brad Larson wrote:
>>> Add Pensando common and Elba SoC specific device nodes
>>>
>>> +&spi0 {
>>> +     num-cs = <4>;
>>> +     cs-gpios = <0>, <0>, <&porta 1 GPIO_ACTIVE_LOW>,
>>> +                <&porta 7 GPIO_ACTIVE_LOW>;
>>> +     status = "okay";
>>> +     spi0_cs0@0 {
>>
>> Generic node name needed matching the class of a devicxe.
> 
> The device on this spi bus is a FPGA with 4 functions and looking at
> other projects I've changed it to a resource-controller node name.  On
> cs0 there is a sub-device reset-controller added in the upcoming
> patchset to enable hardware reset of the eMMC device.
> 
>>> +             compatible = "semtech,sx1301";  /* Enable spidev */
>>
>> This comment is a bit odd... did you just use random compatible from
>> spidev instead of defining proper compatible?
> 
> Yes, because adding a compatible was nacked.  We have a driver added
> (two actually, mfd and reset driver) for the next patch update.

Yeah, but using some other one is also not correct.



Best regards,
Krzysztof