linux-kernel - [PATCH] spi: imx: enable runtime pm support

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Date:   Fri, 13 Nov 2020 12:18:00 +0300
From:   Nikita Shubin <nikita.shubin@...uefel.me>
To:     xiaoning.wang@....com
Cc:     broonie@...nel.org, festevam@...il.com, kernel@...gutronix.de,
        linux-arm-kernel@...ts.infradead.org, linux-imx@....com,
        linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
        s.hauer@...gutronix.de, shawnguo@...nel.org,
        Nikita Shubin <nikita.shubin@...uefel.me>
Subject: [PATCH] spi: imx: enable runtime pm support

Hello Clark, 

This patch breaks spi-imx on imx7d.
Toradex Colibri imx7d spi reports with:

    [    4.258468] inv-mpu6000-spi spi2.0: I/O Error in PIO
    [    4.264269] inv-mpu6000-spi spi2.0: SPI transfer failed: -110
    [    4.264305] spi_master spi2: failed to transfer one message from queue

We are using spi-imx with dma.

Reverting your patch fixes this issue.

The baseline commit 951cbbc386ff01b50da4f46387e994e81d9ab431 (tag: v5.9.8, stable/linux-5.9.y)

Could you please give some comments on this issue ?