Re: [PATCH v2] mmc: dw_mmc: revise the reset path in runtime resume

From	Jaehoon Chung <jh80.chung@samsung.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2] mmc: dw_mmc: revise the reset path in runtime resume
Date	2017-01-05 02:30 +0100
Message-ID	<sW52p-4fR-1@gated-at.bofh.it> (permalink)
References	<sW52p-4fR-3@gated-at.bofh.it> <sVTui-55P-51@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hi, 

On 01/04/2017 09:51 PM, Ziyuan Xu wrote:
> Immediately after reset, issue the command which sets
> update_clock_register_only bit, the card clock will restart. Revise
> dw_mci_ctrl_reset to dw_mci_reset, which has wrapped this sequence.
> 
> The patch fixes commit e9ed8835e990 ("mmc: dw_mmc: add runtime PM
> callback"). MMC_PM_KEEP_POWEP is disabled for SD card and eMMC slots, so
> that they have no chance to invoke dw_mci_setup_bus for update clock
> behaviour. Let's consummate it.
> 
> Reported-by: Randy Li <randy.li@rock-chips.com>
> Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>

Doesn't it need Shawn's Signed-off tag?

Best Regards,
Jaehoon Chung

> 
> ---
> 
> Changes in v2:
> - update the commit message
> - use dw_mci_reset instead of dw_mci_ctrl_reset
> 
>  drivers/mmc/host/dw_mmc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index b44306b..ed63237 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -3324,7 +3324,7 @@ int dw_mci_runtime_resume(struct device *dev)
>  	if (ret)
>  		goto err;
>  
> -	if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) {
> +	if (!dw_mci_reset(host)) {
>  		clk_disable_unprepare(host->ciu_clk);
>  		ret = -ENODEV;
>  		goto err;
>

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[PATCH v2] mmc: dw_mmc: revise the reset path in runtime resume Ziyuan Xu <xzy.xu@rock-chips.com> - 2017-01-04 14:10 +0100
  Re: [PATCH v2] mmc: dw_mmc: revise the reset path in runtime resume ayaka <ayaka@soulik.info> - 2017-01-04 17:10 +0100
    Re: [PATCH v2] mmc: dw_mmc: revise the reset path in runtime resume Jaehoon Chung <jh80.chung@samsung.com> - 2017-01-05 02:40 +0100
      Re: [PATCH v2] mmc: dw_mmc: revise the reset path in runtime resume Ziyuan <xzy.xu@rock-chips.com> - 2017-01-05 03:00 +0100
  Re: [PATCH v2] mmc: dw_mmc: revise the reset path in runtime resume Jaehoon Chung <jh80.chung@samsung.com> - 2017-01-05 02:30 +0100

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