linux-kernel - Re: [PATCH v4 09/13] mmc: mmci: add Qcom specifics of clk and datactrl registers.

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Message-ID: <53885690.8050003@linaro.org>
Date:	Fri, 30 May 2014 10:59:44 +0100
From:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:	Ulf Hansson <ulf.hansson@...aro.org>
CC:	Russell King <linux@....linux.org.uk>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	Chris Ball <chris@...ntf.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH v4 09/13] mmc: mmci: add Qcom specifics of clk and datactrl
 registers.



On 30/05/14 10:55, Ulf Hansson wrote:
> On 28 May 2014 15:47,  <srinivas.kandagatla@...aro.org> wrote:
>> From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>>
>> This patch adds specifics of clk and datactrl register on Qualcomm SD
>> Card controller. This patch also populates the Qcom variant data with
>> these new values specific to Qualcomm SD Card Controller.
>>
>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
>> ---
>>   drivers/mmc/host/mmci.c |  4 ++++
>>   drivers/mmc/host/mmci.h | 17 +++++++++++++++++
>>   2 files changed, 21 insertions(+)
>>
>> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
>> index 8deea4a..dbcb952 100644
>> --- a/drivers/mmc/host/mmci.c
>> +++ b/drivers/mmc/host/mmci.c
>> @@ -179,6 +179,10 @@ static struct variant_data variant_qcom = {
>>          .fifosize               = 16 * 4,
>>          .fifohalfsize           = 8 * 4,
>>          .clkreg                 = MCI_CLK_ENABLE,
>> +       .clkreg_enable          = MCI_QCOM_CLK_FLOWENA |
>> +                                 MCI_QCOM_CLK_SELECT_IN_FBCLK,
>> +       .clkreg_8bit_bus_enable = MCI_QCOM_CLK_WIDEBUS_8,
>> +       .datactrl_mask_ddrmode  = MCI_QCOM_CLK_SELECT_IN_DDR_MODE,
>
> This stuff should go in patch3.

Yes, I will merge patch3 and this change-set in next version.

>
>>          .blksz_datactrl4        = true,
>>          .datalength_bits        = 24,
>>          .pwrreg_powerup         = MCI_PWR_UP,
>> diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
>> index cd83ca3..706eb513 100644
>> --- a/drivers/mmc/host/mmci.h
>> +++ b/drivers/mmc/host/mmci.h
>> @@ -41,6 +41,15 @@
>>   /* Modified PL180 on Versatile Express platform */
>>   #define MCI_ARM_HWFCEN         BIT(12)
>>
>> +/* Modified on Qualcomm Integrations */
>> +#define MCI_QCOM_CLK_WIDEBUS_8 (BIT(10) | BIT(11))
>> +#define MCI_QCOM_CLK_FLOWENA   BIT(12)
>> +#define MCI_QCOM_CLK_INVERTOUT BIT(13)
>> +
>> +/* select in latch data and command in */
>> +#define MCI_QCOM_CLK_SELECT_IN_FBCLK   BIT(15)
>> +#define MCI_QCOM_CLK_SELECT_IN_DDR_MODE        (BIT(14) | BIT(15))
>> +
>>   #define MMCIARGUMENT           0x008
>>   #define MMCICOMMAND            0x00c
>>   #define MCI_CPSM_RESPONSE      BIT(6)
>> @@ -54,6 +63,14 @@
>>   #define MCI_ST_NIEN            BIT(13)
>>   #define MCI_ST_CE_ATACMD       BIT(14)
>>
>> +/* Modified on Qualcomm Integrations */
>> +#define MCI_QCOM_CSPM_DATCMD           BIT(12)
>> +#define MCI_QCOM_CSPM_MCIABORT         BIT(13)
>> +#define MCI_QCOM_CSPM_CCSENABLE                BIT(14)
>> +#define MCI_QCOM_CSPM_CCSDISABLE       BIT(15)
>> +#define MCI_QCOM_CSPM_AUTO_CMD19       BIT(16)
>> +#define MCI_QCOM_CSPM_AUTO_CMD21       BIT(21)
>> +
>
> Maybe you should have one patch in the beginning of the patchset, that
> adds all the new QCOM bits in the header file? Instead of splitting
> them up?
Ok, I will do that in next version.

Thanks,
srini
>
>>   #define MMCIRESPCMD            0x010
>>   #define MMCIRESPONSE0          0x014
>>   #define MMCIRESPONSE1          0x018
>> --
>> 1.9.1
>>
>
> Kind regards
> Ulf Hansson
>
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