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Date:   Wed, 2 Dec 2020 17:17:51 -0800
From:   Doug Anderson <>
To:     Stephen Boyd <>
Cc:     Benson Leung <>,
        Enric Balletbo i Serra <>,
        LKML <>,
        Simon Glass <>,
        Gwendal Grignou <>,
        Alexandru M Stan <>
Subject: Re: [PATCH 1/2] platform/chrome: cros_ec_spi: Don't overwrite spi::mode


On Wed, Dec 2, 2020 at 5:16 PM Stephen Boyd <> wrote:
> There isn't any need to overwrite the mode here in the driver with what
> has been detected by the firmware, such as DT or ACPI. In fact, if we
> use the SPI CS gpio descriptor feature we will overwrite the mode with
> SPI_MODE_0 where it already contains SPI_MODE_0 and more importantly
> SPI_CS_HIGH. Clearing the SPI_CS_HIGH bit causes the CS line to toggle
> when the device is probed when it shouldn't change, confusing the driver
> and making it fail to probe. Drop the assignment and let the spi core
> take care of it.
> Fixes: a17d94f0b6e1 ("mfd: Add ChromeOS EC SPI driver")
> Cc: Simon Glass <>
> Cc: Gwendal Grignou <>
> Cc: Douglas Anderson <>
> Cc: Alexandru M Stan <>
> Signed-off-by: Stephen Boyd <>
> ---
>  drivers/platform/chrome/cros_ec_spi.c | 1 -

Reviewed-by: Douglas Anderson <>
Tested-by: Douglas Anderson <>

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