linux-kernel - Re: [PATCH] mmc: sdhci-of-at91: make MMC_SDHCI_OF_AT91 depend on HAVE

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Date:   Wed, 22 Apr 2020 18:04:02 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andrew Jeffery <andrew@...id.au>,
        Baolin Wang <baolin.wang@...aro.org>,
        Chunyan Zhang <zhang.chunyan@...aro.org>,
        Faiz Abbas <faiz_abbas@...com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Takao Orito <orito.takao@...ionext.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        YueHaibing <yuehaibing@...wei.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: sdhci-of-at91: make MMC_SDHCI_OF_AT91 depend on HAVE_CLK

On Wed, 22 Apr 2020 at 17:34, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
>
> If sdhci-of-at91.c is compiled without CONFIG_HAVE_CLK, the line
>
>   caps1 |= FIELD_PREP(SDHCI_CLOCK_MUL_MASK, clk_mul);
>
> ... emits "FIELD_PREP: value too large for the field" warning.
>
> The compiler seems to decide clk_mul is constant (unsigned int)-1,
> because clk_get_rate() returns 0 when CONFIG_HAVE_CLK is disabled.
>
> Add HAVE_CLK to the depenency since this driver does not work without
> the clock APIs anyway.
>
> Link: https://lkml.org/lkml/2020/4/17/613
> Fixes: linux-next ("mmc: sdhci: use FIELD_GET/PREP for capabilities bit masks")

I don't know about these, but I just decided to drop them.

> Reported-by: Randy Dunlap <rdunlap@...radead.org>
> Suggested-by: Adrian Hunter <adrian.hunter@...el.com>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>

Applied for next, thanks!

Kind regards
Uffe

> ---
>
> Ulf,
>
> I do not know how to fill the Fixes tag.
> It is currently 8da1ff4f68a2 in linux-next, but I am not sure it is
> stable. I just added 'linux-next'.

...and there are no usefull commit hash to use from my tree either, as
I am occasionally rebasing my next branch.


>
> If you have a preferred way, please modify it.
>
>
>
>
>
>  drivers/mmc/host/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 462b5352fea7..2aee844722d6 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -171,7 +171,7 @@ config MMC_SDHCI_OF_ASPEED
>  config MMC_SDHCI_OF_AT91
>         tristate "SDHCI OF support for the Atmel SDMMC controller"
>         depends on MMC_SDHCI_PLTFM
> -       depends on OF
> +       depends on OF && HAVE_CLK
>         help
>           This selects the Atmel SDMMC driver
>
> --
> 2.25.1
>