Kyungmin Park wrote:
>
> Hi,
>
> On Thu, Jun 10, 2010 at 8:39 PM, Kukjin Kim <kgene.kim@xxxxxxxxxxx> wrote:
> > From: Lee Hyuk <hyuk1.lee@xxxxxxxxxxx>
> >
> > On Samsung's SDMMC hosts the timeout clock is derivied from the SD
> > Clock, which is set dynamically.
> > So, checked 'SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK' quirk and removed
> > 'sdhci_s3c_get_timeout_clk' callback which doesn't need any more.
> >
> > Signed-off-by: Hyuk Lee <hyuk1.lee@xxxxxxxxxxx>
> > Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
> > ---
> > drivers/mmc/host/sdhci-s3c.c | 10 +++-------
> > 1 files changed, 3 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
> > index af21792..ca09382 100644
> > --- a/drivers/mmc/host/sdhci-s3c.c
> > +++ b/drivers/mmc/host/sdhci-s3c.c
> > @@ -110,11 +110,6 @@ static unsigned int sdhci_s3c_get_max_clk(struct
> sdhci_host *host)
> > return max;
> > }
> >
> > -static unsigned int sdhci_s3c_get_timeout_clk(struct sdhci_host *host)
> > -{
> > - return sdhci_s3c_get_max_clk(host) / 1000000;
> > -}
> > -
> > /**
> > * sdhci_s3c_consider_clock - consider one the bus clocks for current
setting
> > * @ourhost: Our SDHCI instance.
> > @@ -188,7 +183,6 @@ static void sdhci_s3c_set_clock(struct sdhci_host
*host,
> unsigned int clock)
> >
> > ourhost->cur_clk = best_src;
> > host->max_clk = clk_get_rate(clk);
> > - host->timeout_clk = sdhci_s3c_get_timeout_clk(host);
> >
> > ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2);
> > ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK;
> > @@ -211,7 +205,6 @@ static void sdhci_s3c_set_clock(struct sdhci_host
*host,
> unsigned int clock)
> >
> > static struct sdhci_ops sdhci_s3c_ops = {
> > .get_max_clock = sdhci_s3c_get_max_clk,
> > - .get_timeout_clock = sdhci_s3c_get_timeout_clk,
> > .set_clock = sdhci_s3c_set_clock,
> > };
> >
> > @@ -335,6 +328,9 @@ static int __devinit sdhci_s3c_probe(struct
> platform_device *pdev)
> > host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR |
> > SDHCI_QUIRK_32BIT_DMA_SIZE);
> >
> > + /* HSMMC on Samsung SoCs uses SDCLK as timeout clock. */
> > + host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
>
> How do you know Samsung SoCs use SDCLK in the spec?
>
Samsung SoC hardware engineer guided about that.
> Is it also true at s3c64xx series?
>
Yes, of course.
>
> > +
> > ret = sdhci_add_host(host);
> > if (ret) {
> > dev_err(dev, "sdhci_add_host() failed\n");
> > --
> > 1.6.2.5
> >
> > --
Thanks.
Best regards,
Kgene.
--
Kukjin Kim <kgene.kim@xxxxxxxxxxx>, Senior Engineer,
SW Solution Development Team, Samsung Electronics Co., Ltd.
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