On 28 August 2012 13:25, Jaehoon Chung <jh80.chung@xxxxxxxxxxx> wrote: > Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx> > Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> > --- > include/linux/mmc/exynos-dw_mmc.h | 61 +++++++++++++++++++++++++++++++++++++ > 1 files changed, 61 insertions(+), 0 deletions(-) > create mode 100644 include/linux/mmc/exynos-dw_mmc.h > > diff --git a/include/linux/mmc/exynos-dw_mmc.h b/include/linux/mmc/exynos-dw_mmc.h > new file mode 100644 > index 0000000..3a6b08b > --- /dev/null > +++ b/include/linux/mmc/exynos-dw_mmc.h > @@ -0,0 +1,61 @@ > +/* > + * Synopsys DesignWare Multimedia Card Interface driver > + * > + * Copyright (c) 2012 Samsung Electronics Co., Ltd. > + * http://www.samsung.com > + * > + * Header file for Exynos specific register > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +#ifndef _EXYNOS_DW_MMC_H > +#define _EXYNOS_DW_MMC_H > +#include <linux/mmc/dw_mmc.h> > +#include <linux/mmc/host.h> > + > +#define SDMMC_EXYNOS_CLKSEL 0x09C > + > +#define SDMMC_GET_CLK_DRV(x) ((x) >> 16 & 0x7) > +#define SDMMC_GET_CLK_SAMPLE(x) ((x) & 0x7) > +#define SDMCM_GET_DIVRATIO(x) ((x) >> 24 & 0x7) > +#define SDMMC_CLK_RESET_DRV_SAMPLE (0x07070007); > + > +#define mci_readl(dev, reg) \ > + __raw_readl((dev)->regs + SDMMC_##reg) > +#define mci_writel(dev, reg, value) \ > + __raw_writel((value), (dev)->regs + SDMMC_##reg) > + > +static inline int exynos_get_clk_drv(struct dw_mci *host) > +{ > + return SDMMC_GET_CLK_DRV(mci_readl(host, EXYNOS_CLKSEL)); > +} > + > +static inline int exynos_get_clk_sample(struct dw_mci *host) > +{ > + return SDMMC_GET_CLK_DRV(mci_readl(host, EXYNOS_CLKSEL)); > +} > + > +static inline void exynos_set_clk_drv_sample(struct dw_mci *host, > + struct mmc_ios *ios) > +{ > + u32 regs, ratio; > + > + regs = mci_readl(host, EXYNOS_CLKSEL); > + ratio = SDMMC_GET_DIV_RATIO(reg); > + if (!ratio) { > + regs &= ~SDMMC_CLK_RESET_DRV_SAMPLE; > + regs |= ratio; > + if (ios->timing == MMC_TIMING_UHS_DDR50) > + regs |= host->pdata->ddr_timing; > + else > + regs |= host->pdata->sdr_timing; > + } else > + regs &= ~SDMMC_CLK_RESET_DRV_SAMPLE; > + > + mci_writel(host, EXYNOS_CLKSEL, regs); > +} > + > +#endif /* _EXYNOS_DW_MMC_H */ > -- > 1.7.4.1 The device tree support patches for dw-mmc gets this done in the exynos specific extension callbacks. Personally, I prefer that over this patch. And, I did not see this code getting used in the other patches of this series. Thanks, Thomas. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
