linux-kernel - Re: [PATCH 7/8] i2c: Make I2C_EXYNOS5=y impossible when EXYNOS_USI

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Date:   Mon, 29 Nov 2021 02:02:00 +0200
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Jaewon Kim <jaewon02.kim@...sung.com>,
        Chanho Park <chanho61.park@...sung.com>,
        David Virag <virag.david003@...il.com>,
        Youngmin Nam <youngmin.nam@...sung.com>,
        devicetree@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-i2c@...r.kernel.org
Subject: Re: [PATCH 7/8] i2c: Make I2C_EXYNOS5=y impossible when EXYNOS_USI_V2=m

On Sun, 28 Nov 2021 at 00:33, Sam Protsenko <semen.protsenko@...aro.org> wrote:
>
> When HSI2C is encapsulated in USIv2 block (e.g. in Exynos850), USIv2
> driver must be loaded first, as it's preparing USI hardware for
> particular protocol use. Make it impossible for i2c-exynos5 driver to be
> built-in when USIv2 driver is built as a module, to prevent incorrect
> booting order for those drivers.
>
> Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
> ---

This patch is not needed, please ignore it.

>  drivers/i2c/busses/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
> index df89cb809330..e815a9dffb2c 100644
> --- a/drivers/i2c/busses/Kconfig
> +++ b/drivers/i2c/busses/Kconfig
> @@ -613,6 +613,7 @@ config I2C_EXYNOS5
>         tristate "Exynos high-speed I2C driver"
>         depends on OF
>         depends on ARCH_EXYNOS || COMPILE_TEST
> +       depends on EXYNOS_USI_V2 || !EXYNOS_USI_V2
>         default y if ARCH_EXYNOS
>         help
>           High-speed I2C controller on Samsung Exynos5 and newer Samsung SoCs:
> --
> 2.30.2
>