From f5a432959aaf02a4c87067c9ae756ab21e98f8b8 Mon Sep 17 00:00:00 2001 From: Philipp Tomsich Date: Tue, 4 Jul 2017 14:49:38 +0200 Subject: rockchip: clk: rk3368: implement MMC/SD clock reparenting The original clock support for MMC/SD cards on the RK3368 suffered from a tendency to select a divider less-or-equal to the the one giving the requested clock-rate: this can lead to higher-than-expected (or rather: higher than supported) clock rates for the MMC/SD communiction. This change rewrites the MMC/SD clock generation to: * always generate a clock less-than-or-equal to the requested clock * support reparenting among the CPLL, GPLL and OSC24M parents to generate the highest clock that does not exceed the requested rate In addition to this, the Linux DTS uses HCLK_MMC/HCLK_SDMMC instead of SCLK_MMC/SCLK_SDMMC: to match this (and to ensure that clock setup always works), we adjust the driver appropriately. This includes the changes from: - rockchip: clk: rk3368: convert MMC_PLL_SEL_* definitions to shifted-value form Signed-off-by: Philipp Tomsich Reviewed-by: Simon Glass --- arch/arm/include/asm/arch-rockchip/cru_rk3368.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'arch/arm/include/asm/arch-rockchip/cru_rk3368.h') diff --git a/arch/arm/include/asm/arch-rockchip/cru_rk3368.h b/arch/arm/include/asm/arch-rockchip/cru_rk3368.h index bf09e2fa68..21f11e017c 100644 --- a/arch/arm/include/asm/arch-rockchip/cru_rk3368.h +++ b/arch/arm/include/asm/arch-rockchip/cru_rk3368.h @@ -92,10 +92,10 @@ enum { /* CLKSEL51_CON */ MMC_PLL_SEL_SHIFT = 8, MMC_PLL_SEL_MASK = GENMASK(9, 8), - MMC_PLL_SEL_CPLL = 0, - MMC_PLL_SEL_GPLL, - MMC_PLL_SEL_USBPHY_480M, - MMC_PLL_SEL_24M, + MMC_PLL_SEL_CPLL = (0 << MMC_PLL_SEL_SHIFT), + MMC_PLL_SEL_GPLL = (1 << MMC_PLL_SEL_SHIFT), + MMC_PLL_SEL_USBPHY_480M = (2 << MMC_PLL_SEL_SHIFT), + MMC_PLL_SEL_24M = (3 << MMC_PLL_SEL_SHIFT), MMC_CLK_DIV_SHIFT = 0, MMC_CLK_DIV_MASK = GENMASK(6, 0), -- cgit