linux-kernel - Re: [PATCH V4]mmc: dw_mmc-k3: UHS-SD card for Hisilicon Hikey

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Date:	Mon, 8 Aug 2016 15:10:31 +0800
From:	Jinguojun <kid.jin@...ilicon.com>
To:	<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <ulf.hansson@...aro.org>,
	<adrian.hunter@...el.com>, <jh80.chung@...sung.com>,
	<wsa+renesas@...g-engineering.com>, <arnd@...db.de>,
	<rmk+kernel@....linux.org.uk>, <shawn.lin@...k-chips.com>
CC:	<guodong.xu@...aro.org>, <kongfei@...ilicon.com>,
	<suzhuangluan@...ilicon.com>
Subject: Re: [PATCH V4]mmc: dw_mmc-k3: UHS-SD card for Hisilicon Hikey

Hi,maintainers

Pls help to review code,this is the newest patch after your advise

Thx
On 2016/8/4 10:16, Jin Guojun wrote:
> mmc: dw_mmc-k3: Hisilicon Hikey have no tuning function in 
> dw_mmc-k3.c,so we must do the tuning function stub when we init UHS card.
> 
> V1:add .prepare_command in dw_mmc.c
> V2:delete .prepare_command, add err = 0 in dw_mci_execute_tuning
> V3:delete err = 0 in dw_mci_execute_tuning,add .execute_tuning in 
> dw_mmc-k3.c
> V4:add "linux-mmc@...r.kernel.org", patch version, Changelog, etc..
> 
> Signed-off-by: Jin Guojun <kid.jin@...ilicon.com>
> ---
>  drivers/mmc/host/dw_mmc-k3.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
> index 8e9d886..6247894 100644
> --- a/drivers/mmc/host/dw_mmc-k3.c
> +++ b/drivers/mmc/host/dw_mmc-k3.c
> @@ -131,11 +131,17 @@ static void dw_mci_hi6220_set_ios(struct dw_mci *host, struct mmc_ios *ios)
>  	host->bus_hz = clk_get_rate(host->biu_clk);
>  }
>  
> +static int dw_mci_hi6220_execute_tuning(struct dw_mci_slot *slot, u32 opcode)
> +{
> +	return 0;
> +}
> +
>  static const struct dw_mci_drv_data hi6220_data = {
>  	.caps			= dw_mci_hi6220_caps,
>  	.switch_voltage		= dw_mci_hi6220_switch_voltage,
>  	.set_ios		= dw_mci_hi6220_set_ios,
>  	.parse_dt		= dw_mci_hi6220_parse_dt,
> +	.execute_tuning		= dw_mci_hi6220_execute_tuning,
>  };
>  
>  static const struct of_device_id dw_mci_k3_match[] = {
>