linux-kernel - Re: [PATCH 2/4] mmc: dw_mmc: add setup

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Message-ID: <56BDC251.4020508@rock-chips.com>
Date:	Fri, 12 Feb 2016 19:30:25 +0800
From:	Shawn Lin <shawn.lin@...k-chips.com>
To:	Jaehoon Chung <jh80.chung@...sung.com>,
	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	shawn.lin@...k-chips.com, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] mmc: dw_mmc: add setup_clk for init hook

On 2016/2/4 14:04, Jaehoon Chung wrote:
> Hi, Shawn.
>
> On 01/28/2016 10:31 AM, Shawn Lin wrote:
>> We add this new argument into init hook for
>> variant drivers to decide whether to do clock
>> related stuff inside the hook.
>>
>> Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com>
>> ---
>>
>>   drivers/mmc/host/dw_mmc-exynos.c   | 4 ++--
>>   drivers/mmc/host/dw_mmc-rockchip.c | 2 +-
>>   drivers/mmc/host/dw_mmc.c          | 2 +-
>>   drivers/mmc/host/dw_mmc.h          | 2 +-
>>   4 files changed, 5 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
>> index 3a7e835..edaa117 100644
>> --- a/drivers/mmc/host/dw_mmc-exynos.c
>> +++ b/drivers/mmc/host/dw_mmc-exynos.c
>> @@ -91,7 +91,7 @@ static inline u8 dw_mci_exynos_get_ciu_div(struct dw_mci *host)
>>   		return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL)) + 1;
>>   }
>>
>> -static int dw_mci_exynos_priv_init(struct dw_mci *host)
>> +static int dw_mci_exynos_priv_init(struct dw_mci *host, bool setup_clk)
>>   {
>
> "bool setup_clk" is made because of exynos SoC, right?

yes, add it for exynos Soc.
Thanks for considering the moving.

> Hmm. I'm checking how we can control without "setup_clk". Waiting for this.
>
> Thanks for removing the hooks. :)
>
> Best Regards,
> Jaehoon Chung
>
>>   	struct dw_mci_exynos_priv_data *priv = host->priv;
>>
>> @@ -159,7 +159,7 @@ static int dw_mci_exynos_resume(struct device *dev)
>>   {
>>   	struct dw_mci *host = dev_get_drvdata(dev);
>>
>> -	dw_mci_exynos_priv_init(host);
>> +	dw_mci_exynos_priv_init(host, false);
>>   	return dw_mci_resume(host);
>>   }
>>
>> diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
>> index 9934503..885c801 100644
>> --- a/drivers/mmc/host/dw_mmc-rockchip.c
>> +++ b/drivers/mmc/host/dw_mmc-rockchip.c
>> @@ -221,7 +221,7 @@ static int dw_mci_rk3288_parse_dt(struct dw_mci *host)
>>   	return 0;
>>   }
>>
>> -static int dw_mci_rockchip_init(struct dw_mci *host)
>> +static int dw_mci_rockchip_init(struct dw_mci *host, bool setup_clk)
>>   {
>>   	/* It is slot 8 on Rockchip SoCs */
>>   	host->sdio_id0 = 8;
>> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
>> index 7128351..1d27a2b 100644
>> --- a/drivers/mmc/host/dw_mmc.c
>> +++ b/drivers/mmc/host/dw_mmc.c
>> @@ -2995,7 +2995,7 @@ int dw_mci_probe(struct dw_mci *host)
>>   	}
>>
>>   	if (drv_data && drv_data->init) {
>> -		ret = drv_data->init(host);
>> +		ret = drv_data->init(host, true);
>>   		if (ret) {
>>   			dev_err(host->dev,
>>   				"implementation specific init failed\n");
>> diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
>> index f695b58..1a9492e 100644
>> --- a/drivers/mmc/host/dw_mmc.h
>> +++ b/drivers/mmc/host/dw_mmc.h
>> @@ -285,7 +285,7 @@ struct dw_mci_slot {
>>    */
>>   struct dw_mci_drv_data {
>>   	unsigned long	*caps;
>> -	int		(*init)(struct dw_mci *host);
>> +	int		(*init)(struct dw_mci *host, bool setup_clk);
>>   	int		(*setup_clock)(struct dw_mci *host);
>>   	void		(*prepare_command)(struct dw_mci *host, u32 *cmdr);
>>   	void		(*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
>>
>
>
>
>


-- 
Best Regards
Shawn Lin