linux-kernel - Re: [PATCH 1/2] mmc: sdhci-of-at91: add quirk for broken HS200

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Date:   Thu, 8 Aug 2019 14:42:38 +0200
From:   Ludovic Desroches <ludovic.desroches@...rochip.com>
To:     Eugen Hristev - M18282 <Eugen.Hristev@...rochip.com>
CC:     Nicolas Ferre - M43238 <Nicolas.Ferre@...rochip.com>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
        "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH 1/2] mmc: sdhci-of-at91: add quirk for broken HS200

On Thu, Aug 08, 2019 at 10:35:40AM +0200, Eugen Hristev - M18282 wrote:
> From: Eugen Hristev <eugen.hristev@...rochip.com>
> 
> HS200 is not implemented in the driver, but the controller claims it
> through caps.
> Remove it via quirk.
> Without this quirk, the mmc core will try to enable hs200, which will fail,
> and the eMMC initialization will fail.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@...rochip.com>

Thanks

Ludovic

> ---
>  drivers/mmc/host/sdhci-of-at91.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/mmc/host/sdhci-of-at91.c b/drivers/mmc/host/sdhci-of-at91.c
> index 57fe3b2..3a8c6d8 100644
> --- a/drivers/mmc/host/sdhci-of-at91.c
> +++ b/drivers/mmc/host/sdhci-of-at91.c
> @@ -370,6 +370,9 @@ static int sdhci_at91_probe(struct platform_device *pdev)
>  	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
>  	pm_runtime_use_autosuspend(&pdev->dev);
>  
> +	/* HS200 is broken at this moment */
> +	host->quirks2 = SDHCI_QUIRK2_BROKEN_HS200;
> +
>  	ret = sdhci_add_host(host);
>  	if (ret)
>  		goto pm_runtime_disable;
> -- 
> 2.7.4
>