linux-kernel - Re: [PATCH V2] mmc: sdhci-sprd: Fix minimum clock limit

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Date:   Tue, 11 Oct 2022 15:51:13 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Wenchao Chen <wenchao.chen666@...il.com>
Cc:     adrian.hunter@...el.com, orsonzhai@...il.com,
        baolin.wang@...ux.alibaba.com, zhang.lyra@...il.com,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        megoo.tang@...il.com, lzx.stg@...il.com
Subject: Re: [PATCH V2] mmc: sdhci-sprd: Fix minimum clock limit

On Tue, 11 Oct 2022 at 12:49, Wenchao Chen <wenchao.chen666@...il.com> wrote:
>
> From: Wenchao Chen <wenchao.chen@...soc.com>
>
> v1 -> v2:
>  - Address Adrian's suggestions
>
> Our controller supports 100K. During the test, it was found that mmc_rescan
> failed to scan the card at 400K, and did not try 300K, 200K, and 100K. After
> modifying the minimum clock limit to 100K, the card scan was successful
>
> Signed-off-by: Wenchao Chen <wenchao.chen@...soc.com>
> Acked-by: Adrian Hunter <adrian.hunter@...el.com>
> Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")

Applied for fixes, thanks!

Kind regards
Uffe

> ---
>  drivers/mmc/host/sdhci-sprd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
> index 46c55ab4884c..b92a408f138d 100644
> --- a/drivers/mmc/host/sdhci-sprd.c
> +++ b/drivers/mmc/host/sdhci-sprd.c
> @@ -309,7 +309,7 @@ static unsigned int sdhci_sprd_get_max_clock(struct sdhci_host *host)
>
>  static unsigned int sdhci_sprd_get_min_clock(struct sdhci_host *host)
>  {
> -       return 400000;
> +       return 100000;
>  }
>
>  static void sdhci_sprd_set_uhs_signaling(struct sdhci_host *host,
> --
> 2.17.1
>