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https://github.com/AsahiLinux/u-boot
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f5a432959a
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 <philipp.tomsich@theobroma-systems.com> Reviewed-by: Simon Glass <sjg@chromium.org>
126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
/*
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* (C) Copyright 2017 Rockchip Electronics Co., Ltd
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* Author: Andy Yan <andy.yan@rock-chips.com>
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _ASM_ARCH_CRU_RK3368_H
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#define _ASM_ARCH_CRU_RK3368_H
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#include <common.h>
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/* RK3368 clock numbers */
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enum rk3368_pll_id {
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APLLB,
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APLLL,
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DPLL,
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CPLL,
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GPLL,
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NPLL,
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PLL_COUNT,
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};
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struct rk3368_cru {
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struct rk3368_pll {
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unsigned int con0;
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unsigned int con1;
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unsigned int con2;
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unsigned int con3;
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} pll[6];
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unsigned int reserved[0x28];
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unsigned int clksel_con[56];
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unsigned int reserved1[8];
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unsigned int clkgate_con[25];
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unsigned int reserved2[7];
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unsigned int glb_srst_fst_val;
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unsigned int glb_srst_snd_val;
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unsigned int reserved3[0x1e];
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unsigned int softrst_con[15];
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unsigned int reserved4[0x11];
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unsigned int misc_con;
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unsigned int glb_cnt_th;
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unsigned int glb_rst_con;
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unsigned int glb_rst_st;
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unsigned int reserved5[0x1c];
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unsigned int sdmmc_con[2];
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unsigned int sdio0_con[2];
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unsigned int sdio1_con[2];
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unsigned int emmc_con[2];
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};
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check_member(rk3368_cru, emmc_con[1], 0x41c);
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struct rk3368_clk_priv {
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struct rk3368_cru *cru;
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};
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enum {
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/* PLL CON0 */
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PLL_NR_SHIFT = 8,
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PLL_NR_MASK = GENMASK(13, 8),
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PLL_OD_SHIFT = 0,
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PLL_OD_MASK = GENMASK(3, 0),
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/* PLL CON1 */
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PLL_LOCK_STA = BIT(31),
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PLL_NF_SHIFT = 0,
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PLL_NF_MASK = GENMASK(12, 0),
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/* PLL CON2 */
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PLL_BWADJ_SHIFT = 0,
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PLL_BWADJ_MASK = GENMASK(11, 0),
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/* PLL CON3 */
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PLL_MODE_SHIFT = 8,
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PLL_MODE_MASK = GENMASK(9, 8),
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PLL_MODE_SLOW = 0,
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PLL_MODE_NORMAL = 1,
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PLL_MODE_DEEP_SLOW = 3,
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PLL_RESET_SHIFT = 5,
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PLL_RESET = 1,
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PLL_RESET_MASK = GENMASK(5, 5),
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/* CLKSEL12_CON */
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MCU_STCLK_DIV_SHIFT = 8,
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MCU_STCLK_DIV_MASK = GENMASK(10, 8),
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MCU_PLL_SEL_SHIFT = 7,
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MCU_PLL_SEL_MASK = BIT(7),
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MCU_PLL_SEL_CPLL = 0,
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MCU_PLL_SEL_GPLL = 1,
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MCU_CLK_DIV_SHIFT = 0,
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MCU_CLK_DIV_MASK = GENMASK(4, 0),
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/* CLKSEL51_CON */
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MMC_PLL_SEL_SHIFT = 8,
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MMC_PLL_SEL_MASK = GENMASK(9, 8),
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MMC_PLL_SEL_CPLL = (0 << MMC_PLL_SEL_SHIFT),
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MMC_PLL_SEL_GPLL = (1 << MMC_PLL_SEL_SHIFT),
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MMC_PLL_SEL_USBPHY_480M = (2 << MMC_PLL_SEL_SHIFT),
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MMC_PLL_SEL_24M = (3 << MMC_PLL_SEL_SHIFT),
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MMC_CLK_DIV_SHIFT = 0,
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MMC_CLK_DIV_MASK = GENMASK(6, 0),
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/* SOFTRST1_CON */
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MCU_PO_SRST_MASK = BIT(13),
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MCU_SYS_SRST_MASK = BIT(12),
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DMA1_SRST_REQ = BIT(2),
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/* SOFTRST4_CON */
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DMA2_SRST_REQ = BIT(0),
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/* GLB_RST_CON */
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PMU_GLB_SRST_CTRL_SHIFT = 2,
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PMU_GLB_SRST_CTRL_MASK = GENMASK(3, 2),
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PMU_RST_BY_FST_GLB_SRST = 0,
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PMU_RST_BY_SND_GLB_SRST = 1,
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PMU_RST_DISABLE = 2,
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WDT_GLB_SRST_CTRL_SHIFT = 1,
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WDT_GLB_SRST_CTRL_MASK = BIT(1),
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WDT_TRIGGER_SND_GLB_SRST = 0,
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WDT_TRIGGER_FST_GLB_SRST = 1,
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TSADC_GLB_SRST_CTRL_SHIFT = 0,
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TSADC_GLB_SRST_CTRL_MASK = BIT(0),
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TSADC_TRIGGER_SND_GLB_SRST = 0,
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TSADC_TRIGGER_FST_GLB_SRST = 1,
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};
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#endif
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