linux-kernel - Re: [PATCH] mmc: sdhci-pxav3: Fix Sparse warning of duplicate set_uhs

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Date:	Tue, 28 Oct 2014 18:01:28 +0100
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Pramod Gurav <pramod.gurav.etc@...il.com>,
	Pramod Gurav <pramod.gurav@...rtplayin.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Chris Ball <chris@...ntf.net>, linux-mmc@...r.kernel.org
Subject: Re: [PATCH] mmc: sdhci-pxav3: Fix Sparse warning of duplicate set_uhs_signaling
 entry

On 10/28/2014 05:41 PM, Pramod Gurav wrote:
> Hi Ulf,
>
> Is this good to go?

Uhm, no it isn't. pxav3 needs a special set_uhs_signaling handler,
remove the standard sdhci provided instead.

Sebastian

> On Mon, Sep 29, 2014 at 6:55 PM, Pramod Gurav
> <pramod.gurav@...rtplayin.com> wrote:
>> This fixes below sparse warning:
>> drivers/mmc/host/sdhci-pxav3.c:227:10: warning: Initializer entry defined twice
>> drivers/mmc/host/sdhci-pxav3.c:232:10:   also defined here
>>
>> by removing duplicate initialization of .set_uhs_signaling in
>> struct sdhci_ops. Also does away with duplcated function.
>>
>> Cc: Russell King <rmk+kernel@....linux.org.uk>
>> Cc: Ulf Hansson <ulf.hansson@...aro.org>
>> Cc: Chris Ball <chris@...ntf.net>
>> Cc: linux-mmc@...r.kernel.org
>> Signed-off-by: Pramod Gurav <pramod.gurav@...rtplayin.com>
>> ---
>>   drivers/mmc/host/sdhci-pxav3.c |   37 -------------------------------------
>>   1 file changed, 37 deletions(-)
>>
>> diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
>> index 6f842fb..fd93e60 100644
>> --- a/drivers/mmc/host/sdhci-pxav3.c
>> +++ b/drivers/mmc/host/sdhci-pxav3.c
>> @@ -186,45 +186,8 @@ static void pxav3_gen_init_74_clocks(struct sdhci_host *host, u8 power_mode)
>>          pxa->power_mode = power_mode;
>>   }
>>
>> -static void pxav3_set_uhs_signaling(struct sdhci_host *host, unsigned int uhs)
>> -{
>> -       u16 ctrl_2;
>> -
>> -       /*
>> -        * Set V18_EN -- UHS modes do not work without this.
>> -        * does not change signaling voltage
>> -        */
>> -       ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
>> -
>> -       /* Select Bus Speed Mode for host */
>> -       ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
>> -       switch (uhs) {
>> -       case MMC_TIMING_UHS_SDR12:
>> -               ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
>> -               break;
>> -       case MMC_TIMING_UHS_SDR25:
>> -               ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
>> -               break;
>> -       case MMC_TIMING_UHS_SDR50:
>> -               ctrl_2 |= SDHCI_CTRL_UHS_SDR50 | SDHCI_CTRL_VDD_180;
>> -               break;
>> -       case MMC_TIMING_UHS_SDR104:
>> -               ctrl_2 |= SDHCI_CTRL_UHS_SDR104 | SDHCI_CTRL_VDD_180;
>> -               break;
>> -       case MMC_TIMING_UHS_DDR50:
>> -               ctrl_2 |= SDHCI_CTRL_UHS_DDR50 | SDHCI_CTRL_VDD_180;
>> -               break;
>> -       }
>> -
>> -       sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
>> -       dev_dbg(mmc_dev(host->mmc),
>> -               "%s uhs = %d, ctrl_2 = %04X\n",
>> -               __func__, uhs, ctrl_2);
>> -}
>> -
>>   static const struct sdhci_ops pxav3_sdhci_ops = {
>>          .set_clock = sdhci_set_clock,
>> -       .set_uhs_signaling = pxav3_set_uhs_signaling,
>>          .platform_send_init_74_clocks = pxav3_gen_init_74_clocks,
>>          .get_max_clock = sdhci_pltfm_clk_get_max_clock,
>>          .set_bus_width = sdhci_set_bus_width,
>> --
>> 1.7.9.5
>>
>> --
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>
>
>

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