On Thu, Aug 29, 2013 at 5:04 AM, Rajeshwari Birje <[email protected]> wrote: > CCing the MMC Maintainer. > > On Thu, Aug 29, 2013 at 4:22 PM, Rajeshwari S Shinde > <[email protected]> wrote: >> This patch corrects the divider value written to CLKDIV register. >> Since SDCLKIN is divided inside controller by the DIVRATIO value set >> in the CLKSEL register, we need to use the same output clock value to >> calculate the CLKDIV value. >> as per user manual: cclk_in = SDCLKIN / (DIVRATIO + 1) >> >> Input parameter to mmc_clk is changed to dwmci_host, since >> we need the same to read DWMCI_CLKSEL register. >> >> This improves the read timing values for channel 0 on SMDK5250 >> from 0.288sec to 0.144sec >> >> Signed-off-by: Rajeshwari S Shinde <[email protected]> >> --- >> arch/arm/include/asm/arch-exynos/dwmmc.h | 4 ++++ >> drivers/mmc/dw_mmc.c | 2 +- >> drivers/mmc/exynos_dw_mmc.c | 17 +++++++++++++++-- >> include/dwmmc.h | 2 +- >> 4 files changed, 21 insertions(+), 4 deletions(-) >> >> diff --git a/arch/arm/include/asm/arch-exynos/dwmmc.h >> b/arch/arm/include/asm/arch-exynos/dwmmc.h >> index b9eca76..f1c8d8a 100644 >> --- a/arch/arm/include/asm/arch-exynos/dwmmc.h >> +++ b/arch/arm/include/asm/arch-exynos/dwmmc.h >> @@ -14,6 +14,10 @@ >> #define DWMCI_SET_DRV_CLK(x) ((x) << 16) >> #define DWMCI_SET_DIV_RATIO(x) ((x) << 24) >> >> +/* CLKSEL Register */ >> +#define DWMCI_DIVRATIO_BIT 24 >> +#define DWMCI_DIVRATIO_MASK 0x7 >> + >> #ifdef CONFIG_OF_CONTROL >> int exynos_dwmmc_init(const void *blob); >> #endif >> diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c >> index a82ee17..3406bdd 100644 >> --- a/drivers/mmc/dw_mmc.c >> +++ b/drivers/mmc/dw_mmc.c >> @@ -224,7 +224,7 @@ static int dwmci_setup_bus(struct dwmci_host *host, u32 >> freq) >> * host->bus_hz should be set from user. >> */ >> if (host->mmc_clk) >> - sclk = host->mmc_clk(host->dev_index); >> + sclk = host->mmc_clk(host);
Do you need to change dw_mmc_simple.c as well? Regards, Simon _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
