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开发环境：win7 64位 + VMware12 + Ubuntu14.04 64位
工具链：linaro提供的gcc-linaro-6.1.1-2016.08-x86_64_arm-linux-gnueabi
要移植的u-boot版本：u-boot-2016-11
Tiny4412开发板硬件版本为：
底板： Tiny4412/Super4412SDK 1506
核心板：Tiny4412 - 1412
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在上一节中我们可以通过点亮tiny4412核心板上的LED灯开始调试u-boot。接下来要做的是初始化exynos4412的时钟。
1、Exynos4412的时钟体系
exynos4412芯片时钟体系的介绍在《Exynos 4412 SCP_Users Manual_Ver.0.10.00_Preliminary.pdf》的第七章节。
Exynos4412有3个初始时钟源：
① XRTCXTI引脚 ：接 32KHz的晶振，用于实时钟 (RTC) 。
② XXTI引脚 ：接12M ～50 MHz的晶振， 用于向系统提供时钟，也可以不接。
③ XUSBXTI引脚 ：接24MHz的晶振 ，用于向系统提供时钟。
在友善之臂tiny4412的开发板中， XRTCXTI 上没有外接晶振，系统时钟来源是XUSBXTI引脚上接的24MH 晶振，如下图所示：
2、Exynos4412的时钟设置
相关的设置结果如下：
3、Exynos4412的时钟设置代码
| diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile index ac47ab2..f2cd76d 100644 --- a/arch/arm/mach-exynos/Makefile +++ b/arch/arm/mach-exynos/Makefile @@ -15,7 +15,7 @@ ifdef CONFIG_SPL_BUILD obj-$(CONFIG_EXYNOS5) += clock_init_exynos5.o obj-$(CONFIG_EXYNOS5) += dmc_common.o dmc_init_ddr3.o obj-$(CONFIG_EXYNOS4210)+= dmc_init_exynos4.o clock_init_exynos4.o -obj-$(CONFIG_EXYNOS4412)+= dmc_init_exynos4.o clock_init_exynos4.o +obj-$(CONFIG_EXYNOS4412)+= dmc_init_exynos4412.o clock_init_exynos4412.o obj-y += spl_boot.o tzpc.o obj-y += lowlevel_init.o endif diff --git a/arch/arm/mach-exynos/clock_init_exynos4412.c b/arch/arm/mach-exynos/clock_init_exynos4412.c new file mode 100644 index 0000000..cd70185 --- /dev/null +++ b/arch/arm/mach-exynos/clock_init_exynos4412.c @@ -0,0 +1,554 @@ +/* + * Clock Initialization for board based on EXYNOS4412 + * + * 2016 + * Modified by AP0904225 <ap0904225@qq.com> + * + * Copyright (C) 2013 Samsung Electronics + * Rajeshwari Shinde <rajeshwari.s@samsung.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <config.h> +#include <asm/io.h> +#include <asm/arch/cpu.h> +#include <asm/arch/clk.h> +#include <asm/arch/clock.h> +#include "common_setup.h" + +#include "exynos4412_setup.h" + +/* + * system_clock_init: Initialize core clock and bus clock. + * void system_clock_init(void) + */ +void system_clock_init(void) +{ + unsigned int set, clr, clr_src_cpu, clr_pll_con0, clr_src_dmc; + struct exynos4x12_clock *clk =(struct exynos4x12_clock *) + samsung_get_base_clock(); + + /* + * APLL= 1400 MHz + * MPLL=800 MHz + * EPLL=96 MHz + * VPLL=108 MHz + * freq (ARMCLK) = 1400 MHz at 1.3 V + * freq (ACLK_COREM0) = 350 MHz at 1.3V + * freq (ACLK_COREM1) = 188 MHz at 1.3 V + * freq (PERIPHCLK) = 1400 MHz at 1.3 V + * freq (ATCLK) = 214 MHz at 1.3 V + * freq (PCLK_DBG) = 107 MHz at 1.3 V + * freq (SCLK_DMC) = 400 MHz at 1.0 V + * freq (ACLK_DMCD) = 200 MHz at 1.0 V + * freq (ACLK_DMCP) = 100 MHz at 1.0 V + * freq (ACLK_ACP) = 200 MHz at 1.0 V + * freq (PCLK_ACP) = 100 MHz at 1.0 V + * freq (SCLK_C2C) = 400 MHz at 1.0 V + * freq (ACLK_C2C) = 200 MHz at 1.0 V + * freq (ACLK_GDL) = 200 MHz at 1.0 V + * freq (ACLK_GPL) = 100 MHz at 1.0 V + * freq (ACLK_GDR) = 200 MHz at 1.0 V + * freq (ACLK_GPR) = 100 MHz at 1.0 V + * freq (ACLK_400_MCUISP) = 400 MHz at 1.0 V + * freq (ACLK_200) = 160 MHz at 1.0 V + * freq (ACLK_100) = 100 MHz at 1.0 V + * freq (ACLK_160) = 160 MHz at 1.0 V + * freq (ACLK_133) = 133 MHz at 1.0 V + * freq (SCLK_ONENAND) = 160 MHz at 1.0 V + */ + + /* + *before set system clocks,we switch system clocks src to FINpll + */ + + /* + * Bit values: 0 ; 1 + * MUX_APLL_SEL: FIN_PLL ; FOUT_APLL + * MUX_CORE_SEL: MOUT_APLL ; SCLK_MPLL + * MUX_HPM_SEL: MOUT_APLL ; SCLK_MPLL_USER_C + * MUX_MPLL_USER_SEL_C: FIN_PLL ; SCLK_MPLL + */ + clr_src_cpu = MUX_APLL_SEL(1) | MUX_CORE_SEL(1) | + MUX_HPM_SEL(1) | MUX_MPLL_USER_SEL_C(1); + set = MUX_APLL_SEL(0) | MUX_CORE_SEL(0) | MUX_HPM_SEL(0) | + MUX_MPLL_USER_SEL_C(0); + clrsetbits_le32(&clk->src_cpu, clr_src_cpu, set); + /* Wait for mux change */ + while (readl(&clk->mux_stat_cpu) & MUX_STAT_CPU_CHANGING) + continue; + + + /* + ****************************************************** + * Step 1: Set Clock divider + ****************************************************** + */ + + /*=====================set APLL related dividers(CMU_CPU)==============================*/ + /* + * Set dividers for MOUTcore + * MOUTcore = MOUTapll = 1400 MHz + * SCLKapll = MOUTapll / (APLL_RATIO + 1) = 700 MHz (DIVapll:APLL_RATIO=1) + * ARMCLK = MOUTcore / (ratio + 1) = 1400 MHz (DIVcore:CORE_RATIO=0;DIVcore2:CORE2_RATIO=0) + * ACLK_COREM0 = ARMCLK / (COREM0_RATIO + 1) = 355 MHz (DIVcorem0:COREM0_RATIO=3) + * ACLK_COREM1 = ARMCLK / (COREM1_RATIO + 1) = 188 MHz (DIVcorem1:COREM1_RATIO=7) + * PERIPHCLK = ARMCLK / (PERIPH_RATIO + 1) = 1400 MHz (DIVperiph:PERIPH_RATIO=0) + * OUTatb = MOUTcore / (ATB_RATIO + 1) = 200 MHz (DIVatb:ATB_RATIO=6) + * ATCLK = OUTatb = 200 MHz + * PCLK_DBG = OUTatb / (PCLK_DBG_RATIO + 1) = 100 MHz (PCLK_DBG_RATIO=1) + */ + clr = APLL_RATIO(7) |CORE_RATIO(7)| CORE2_RATIO(7)| + COREM0_RATIO(7) | COREM1_RATIO(7) | + PERIPH_RATIO(7) | ATB_RATIO(7) | PCLK_DBG_RATIO(7) ; + set = APLL_RATIO(1) |CORE_RATIO(0) | CORE2_RATIO(0) | + COREM0_RATIO(3) | COREM1_RATIO(7)| + PERIPH_RATIO(0) | ATB_RATIO(6) | PCLK_DBG_RATIO(1) ; + clrsetbits_le32(&clk->div_cpu0, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_cpu0) & DIV_STAT_CPU0_CHANGING) + continue; + + /* Set dividers for MOUThpm + * MOUThpm = MOUTapll = 1400 MHz + * OUTcopy = MOUThpm / (COPY_RATIO + 1) = 200 (DIVcopy:COPY_RATIO=6) + * sclkhpm = OUTcopy / (HPM_RATIO + 1) = 200 (DIVhpm:HPM_RATIO=0) + * ACLK_CORES = ARMCLK / (CORES_RATIO + 1) = 233 (DIVcores:CORES_RATIO=5) + */ + clr = COPY_RATIO(7) | HPM_RATIO(7) | CORES_RATIO(7); + set = COPY_RATIO(6) | HPM_RATIO(0) | CORES_RATIO(5); + clrsetbits_le32(&clk->div_cpu1, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_cpu1) & DIV_STAT_CPU1_CHANGING) + continue; + + + /*=====================set MPLL related dividers(CMU_DMC)==============================*/ + + /* + * Set CLK_DIV_DMC0 + * MOUTmpll = SCLKmpll = 800 MHz + * MOUTdmc_bus = SCLKmpll = 800 MHz + * MOUTdphy = SCLKmpll = 800 MHz + * + * SCLK_DMC = MOUTdmc_bus / (DMC_RATIO + 1) = 400MHz (DIVdmc:DMC_RATIO=1) + * ACLK_DMCD = SCLK_DMC / (DMCD_RATIO + 1) = 200MHz (DIVdmcd:DMCD_RATIO=1) + * ACLK_DMCP = ACLK_DMCD / (DMCP_RATIO + 1) = 100MHz (DIVdmcp:DMCP_RATIO=1) + * ACLK_ACP = MOUTdmc_bus / (ACP_RATIO + 1) = 200MHz (DIVacp:ACP_RATIO=3) + * PCLK_ACP = ACLK_ACP / (ACP_PCLK_RATIO + 1) = 100MHz (DIVacp_pclk:ACP_PCLK_RATIO=1) + * SCLK_DPHY = MOUTdphy / (DPHY_RATIO + 1) = 400MHz (DIVdphy:DPHY_RATIO=1) + */ + clr = DMC_RATIO(7) | DMCD_RATIO(7) | DMCP_RATIO(7) | + ACP_RATIO(7) | ACP_PCLK_RATIO(7) | DPHY_RATIO(7); + set = DMC_RATIO(1) | DMCD_RATIO(1) | DMCP_RATIO(1) | + ACP_RATIO(3) | ACP_PCLK_RATIO(1) | DPHY_RATIO(1); + clrsetbits_le32(&clk->div_dmc0, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_dmc0) & DIV_STAT_DMC0_CHANGING) + continue; + + /* + * Set CLK_DIV_DMC1 + * MOUTmpll = SCLKmpll = 800 MHz + * MOUTc2c = SCLKmpll = 800 Mhz + * MOUTpwi = SCLKmpll = 800 MHz + * MOUTg2d_acp = SCLKmpll = 800 MHz + * + * SCLK_C2C = MOUTc2c / (C2C_RATIO + 1) = 400MHz (DIVc2c:C2C_RATIO=1) + * ACLK_C2C = SCLK_C2C / (C2C_ACLK_RATIO + 1) = 200MHz (DIVc2c_aclk:C2C_ACLK_RATIO=1) + * SCLK_PWI = MOUTpwi / (PWI_RATIO + 1) = 100MHz (DIVpwi:PWI_RATIO=7) + * SCLK_G2D_ACP = MOUTg2d_acp / (G2D_ACP_RATIO + 1) = 200MHz (G2D_ACP_RATIO=3) + * IECDPMCLKEN = ACLK_DMCP/( DPM_RATIO+ 1) = 50MHz(DIVdpm:DPM_RATIO=1) + * IECDVSEMCLKEN = ACLK_DMCP/( DVSEM_RATIO+ 1) = 50MHz(DIVdvsem:DVSEM_RATIO=1) + */ + clr = C2C_RATIO(7) | C2C_ACLK_RATIO(7) | PWI_RATIO(15) | + G2D_ACP_RATIO(15) | DVSEM_RATIO(127) | DPM_RATIO(127); + set = C2C_RATIO(1) | C2C_ACLK_RATIO(1) | PWI_RATIO(7) | + G2D_ACP_RATIO(3) | DVSEM_RATIO(1) | DPM_RATIO(1); + clrsetbits_le32(&clk->div_dmc1, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_dmc1) & DIV_STAT_DMC1_CHANGING) + continue; + + + /*=====================set CMU_TOP related dividers==============================*/ + /* + * Set CLK_DIV_TOP + * SCLKmll_user_t = SCLKmpll = 800 MHz + * MOUTACLK_400_MC = SCLKmpll = 800 MHz + * MOUTACLK_400_MCUISP = MOUTACLK_400_MC/(ACLK_400_MCUISP_RATIO + 1) = 400MHz (DIVaclk_400_mc:ACLK_400_MCUISP_RATIO=1) + * MOUTACLK_200 = SCLKmpll = 800 MHz + * ACLK_200 = MOUTACLK_200/(ACLK_200_RATIO + 1) = 160MHz (DIVaclk_200:ACLK_200_RATIO=4) + * MOUTACLK_266_gps = SCLKmpll = 800 MHz + * ACLK_266_GPS = [MOUTACLK_266_GPS /(ACLK_266_GPS_RATIO + 1)] = 266MHz (DIVaclk_266_gps:ACLK_266_GPS_RATIO=2) + * MOUTACLK_100 = SCLKmpll = 800 MHz + * ACLK_100 = [MOUTACLK_100/(ACLK_100_RATIO + 1)] = 100MHz (DIVaclk_100:ACLK_100_RATIO=7) + * MOUTACLK_160 = SCLKmpll = 800 MHz + * ACLK_160 = [MOUTACLK_160 /(ACLK_160_RATIO + 1)] = 160MHz (DIVaclk_160:ACLK_160_RATIO=4) + * MOUTACLK_133 = SCLKmpll = 800 MHz + * ACLK_133 = [MOUTACLK_133 /(ACLK_133_RATIO + 1)] = 133MHz (DIVaclk_133:ACLK_133_RATIO=5) + * MOUTonenand = MOUTonenand_1 = ACLK_133MHz + * SCLK_ONENAND = [MOUTONENAND_1 /(ONENAND_RATIO + 1)] = 66MHz (DIVonenand:ONENAND_RATIO=1) + */ + clr = ACLK_400_MCUISP_RATIO(7) | ACLK_200_RATIO(7) | ACLK_266_GPS_RATIO(7) | + ACLK_100_RATIO(15) | ACLK_160_RATIO(7) | ACLK_133_RATIO(7) |ONENAND_RATIO(7); + set = ACLK_400_MCUISP_RATIO(1) | ACLK_200_RATIO(4) | ACLK_266_GPS_RATIO(2) | + ACLK_100_RATIO(7) | ACLK_160_RATIO(4) | ACLK_133_RATIO(5) |ONENAND_RATIO(1); + clrsetbits_le32(&clk->div_top, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_top) & DIV_STAT_TOP_CHANGING) + continue; + + /*=====================set CMU_LEFTBUS related dividers==============================*/ + /* + * Set CLK_DIV_LEFTBUS + * MOUTgdl = SCLKmpll = 800 MHz + * ACLK_GDL = MOUTgdl/(GDL_RATIO + 1) = 200MHz (DIVgdl:GDL_RATIO=3) + * ACLK_GPL = ACLK_GDL/(GPL_RATIO + 1) = 100MHz (DIVgpl:GPL_RATIO=1) + */ + clr = GDL_RATIO(7) | GPL_RATIO(7) ; + set = GDL_RATIO(3) | GPL_RATIO(1) ; + clrsetbits_le32(&clk->div_leftbus, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_leftbus) & DIV_STAT_LEFTBUS_CHANGING) + continue; + + /*=====================set CMU_RIGHTBUS related dividers==============================*/ + /* + * Set CLK_DIV_RIGHTBUS + * MOUTgdr = SCLKmpll = 800 MHz + * ACLK_GDR = MOUTgdr/(GDR_RATIO + 1) = 200MHz (DIVgdl:GDR_RATIO=3) + * ACLK_GPL = ACLK_GDL/(GPR_RATIO + 1) = 100MHz (DIVgpl:GPR_RATIO=1) + */ + clr = GDR_RATIO(7) | GPR_RATIO(7) ; + set = GDR_RATIO(3) | GPR_RATIO(1) ; + clrsetbits_le32(&clk->div_rightbus, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_rightbus) & DIV_STAT_LEFTBUS_CHANGING) + continue; + + /*=====================set other dividers==============================*/ + + /* CLK_DIV_PERIL0 (UART0-4 dividers ) */ + /* + * MOUTuart0-4 = SCLKMPLL_USER_T =800MHz + * + * SCLK_UARTx = MOUTuartX / (UARTx_RATIO + 1) = 100MHz (DIVuart0-4:UARTx_RATIO=7) + */ + clr = UART0_RATIO(15) | UART1_RATIO(15) | UART2_RATIO(15) | + UART3_RATIO(15) | UART4_RATIO(15); + set = UART0_RATIO(7) | UART1_RATIO(7) | UART2_RATIO(7) | + UART3_RATIO(7) | UART4_RATIO(7); + clrsetbits_le32(&clk->div_peril0, clr, set); + + while (readl(&clk->div_stat_peril0) & DIV_STAT_PERIL0_CHANGING) + continue; + + /* CLK_DIV_FSYS1 */ + clr = MMC0_RATIO(15) | MMC0_PRE_RATIO(255) | MMC1_RATIO(15) | + MMC1_PRE_RATIO(255); + /* + * For MOUTmmc0-3 = 800 MHz (MPLL) + * + * DOUTmmc1 = MOUTmmc1 / (ratio + 1) = 100 (7) + * sclk_mmc1 = DOUTmmc1 / (ratio + 1) = 50 (1) + * DOUTmmc0 = MOUTmmc0 / (ratio + 1) = 100 (7) + * sclk_mmc0 = DOUTmmc0 / (ratio + 1) = 50 (1) + */ + set = MMC0_RATIO(7) | MMC0_PRE_RATIO(1) | MMC1_RATIO(7) | + MMC1_PRE_RATIO(1); + + clrsetbits_le32(&clk->div_fsys1, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_fsys1) & DIV_STAT_FSYS1_CHANGING) + continue; + + /* CLK_DIV_FSYS2 */ + clr = MMC2_RATIO(15) | MMC2_PRE_RATIO(255) | MMC3_RATIO(15) | + MMC3_PRE_RATIO(255); + /* + * For MOUTmmc0-3 = 800 MHz (MPLL) + * + * DOUTmmc3 = MOUTmmc3 / (ratio + 1) = 100 (7) + * sclk_mmc3 = DOUTmmc3 / (ratio + 1) = 50 (1) + * DOUTmmc2 = MOUTmmc2 / (ratio + 1) = 100 (7) + * sclk_mmc2 = DOUTmmc2 / (ratio + 1) = 50 (1) + */ + set = MMC2_RATIO(7) | MMC2_PRE_RATIO(1) | MMC3_RATIO(7) | + MMC3_PRE_RATIO(1); + + clrsetbits_le32(&clk->div_fsys2, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_fsys2) & DIV_STAT_FSYS2_CHANGING) + continue; + + /* CLK_DIV_FSYS3 */ + clr = MMC4_RATIO(15) | MMC4_PRE_RATIO(255); + /* + * For MOUTmmc4 = 800 MHz (MPLL) + * + * DOUTmmc4 = MOUTmmc4 / (ratio + 1) = 100 (7) + * sclk_mmc4 = DOUTmmc4 / (ratio + 1) = 100 (0) + */ + set = MMC4_RATIO(7) | MMC4_PRE_RATIO(0); + + clrsetbits_le32(&clk->div_fsys3, clr, set); + + /* Wait for divider ready status */ + while (readl(&clk->div_stat_fsys3) & DIV_STAT_FSYS3_CHANGING) + continue; + + + /* + * Step 2: Set APLL, MPLL, EPLL, VPLL locktime + */ + clr = PLL_LOCKTIME(65535); + + /*====== APLL locktime [APLL = 1400MHz : SDIV(0) , PDIV(3) , MDIV(175)] =====*/ + set = PLL_LOCKTIME( PDIV(3) * 270 ); + clrsetbits_le32(&clk->apll_lock, clr, set); + + /*====== MPLL locktime [MPLL = 800MHz : SDIV(0) , PDIV(3) , MDIV(100)] =====*/ + set = PLL_LOCKTIME( PDIV(3) * 270 ); + clrsetbits_le32(&clk->mpll_lock, clr, set); + + /*====== EPLL locktime [EPLL = 96MHz : SDIV(3) , PDIV(2) , MDIV(64)] =====*/ + set = PLL_LOCKTIME( PDIV(2) * 3000 ); + clrsetbits_le32(&clk->epll_lock, clr, set); + + /*====== VPLL locktime [VPLL = 108MHz : SDIV(3) , PDIV(2) , MDIV(72)] =====*/ + set = PLL_LOCKTIME( PDIV(2) * 3000 ); + clrsetbits_le32(&clk->vpll_lock, clr, set); + + + /* + * Step 3: Set PLL PMS values and enable PLL + * 1.Set PDIV, MDIV, and SDIV values for APLL, MPLL, EPLL, VPLL + * 2.Turn on APLL, MPLL, EPLL, VPLL + */ + + /**************** Set APLL to 1400MHz ****************/ + /*APLL_CON1*/ + clr = AFC(15) | LOCK_CON_DLY(15) | LOCK_CON_IN(3) | + LOCK_CON_OUT(3) |FEED_EN(1)| AFC_ENB(1) | + DCC_ENB(1) | BYPASS(1) |RESV0(1) | RESV1(1); + set = AFC(0) | LOCK_CON_DLY(8) | LOCK_CON_IN(3) | + LOCK_CON_OUT(0) |FEED_EN(0)| AFC_ENB(0) | + DCC_ENB(0) | BYPASS(0) |RESV0(1) | RESV1(0); + clrsetbits_le32(&clk->apll_con1, clr, set); + + /*APLL_CON0*/ + clr_pll_con0 = SDIV(7) | PDIV(63) | MDIV(1023) | FSEL(1); + set = SDIV(0) | PDIV(3) | MDIV(175) | FSEL(0) | PLL_ENABLE(1); + clrsetbits_le32(&clk->apll_con0, clr_pll_con0, set); + + /* Wait for PLL to be locked */ + while (!(readl(&clk->apll_con0) & PLL_LOCKED_BIT)) + continue; + + + /**************** Set MPLL to 800MHz ****************/ + /*MPLL_CON1*/ + clr = AFC(15) | LOCK_CON_DLY(15) | LOCK_CON_IN(3) | + LOCK_CON_OUT(3) |FEED_EN(1)| AFC_ENB(1) | + DCC_ENB(1) | BYPASS(1) |RESV0(1) | RESV1(1); + set = AFC(0) | LOCK_CON_DLY(8) | LOCK_CON_IN(3) | + LOCK_CON_OUT(0) |FEED_EN(0)| AFC_ENB(0) | + DCC_ENB(0) | BYPASS(0) |RESV0(1) | RESV1(0); + clrsetbits_le32(&clk->mpll_con1, clr, set); + + /*MPLL_CON0*/ + set = SDIV(0) | PDIV(3) | MDIV(100) | FSEL(0) | PLL_ENABLE(1); + clrsetbits_le32(&clk->mpll_con0, clr_pll_con0, set); + + /* Wait for PLL to be locked */ + while (!(readl(&clk->mpll_con0) & PLL_LOCKED_BIT)) + continue; + + + /**************** Set EPLL to 96MHz ****************/ + /*EPLL_CON2*/ + clr = BYPASS_E_V(1) | SSCG_EN(1) | + AFC_ENB_E_V(1) |DCC_ENB_E_V(1) ; + set = BYPASS_E_V(1) | SSCG_EN(1) | + AFC_ENB_E_V(1) |DCC_ENB_E_V(1) ; + clrsetbits_le32(&clk->epll_con2, clr, set); + + /*EPLL_CON1*/ + clr = K(65535) | MFR(255) | MRR(31) | SEL_PF(3); + set = K(0) | MFR(1) | MRR(6) | SEL_PF(3); + clrsetbits_le32(&clk->epll_con1, clr, set); + + /*EPLL_CON0*/ + set = SDIV(3) | PDIV(2) | MDIV(64) | PLL_ENABLE(1); + clrsetbits_le32(&clk->epll_con0, clr_pll_con0, set); + + /* Wait for PLL to be locked */ + while (!(readl(&clk->epll_con0) & PLL_LOCKED_BIT)) + continue; + + + /**************** Set VPLL to 108MHz ****************/ + /*VPLL_CON2*/ + clr = BYPASS_E_V(1) | SSCG_EN(1) | + AFC_ENB_E_V(1) |DCC_ENB_E_V(1) ; + set = BYPASS_E_V(1) | SSCG_EN(1) | + AFC_ENB_E_V(1) |DCC_ENB_E_V(1) ; + clrsetbits_le32(&clk->vpll_con2, clr, set); + + /*VPLL_CON1*/ + clr = K(65535) | MFR(255) | MRR(31) | SEL_PF(3); + set = K(0) | MFR(1) | MRR(6) | SEL_PF(3); + clrsetbits_le32(&clk->vpll_con1, clr, set); + + /*VPLL_CON0*/ + set = SDIV(3) | PDIV(2) | MDIV(72) | PLL_ENABLE(1); + clrsetbits_le32(&clk->vpll_con0, clr_pll_con0, set); + + /* Wait for PLL to be locked */ + while (!(readl(&clk->vpll_con0) & PLL_LOCKED_BIT)) + continue; + + + /* + * Step 4: Select the PLL(APLL, MPLL, EPLL, VPLL ...) output clock + */ + + /*************** Set CMU_UART0-4 clocks src MUX ***************/ + + /* CLK_SRC_PERIL0 */ + clr = UART0_SEL(15) | UART1_SEL(15) | UART2_SEL(15) | + UART3_SEL(15) | UART4_SEL(15); + /* + * Set CLK_SRC_PERIL0 clocks src to MPLL + * src values: 0(XXTI); 1(XusbXTI); 2(SCLK_HDMI24M); 3(SCLK_USBPHY0); + * 5(SCLK_HDMIPHY); 6(SCLK_MPLL_USER_T); 7(SCLK_EPLL); + * 8(SCLK_VPLL) + * + * Set all to SCLK_MPLL_USER_T + */ + set = UART0_SEL(6) | UART1_SEL(6) | UART2_SEL(6) | UART3_SEL(6) | + UART4_SEL(6); + + clrsetbits_le32(&clk->src_peril0, clr, set); + + + /*************** Set CMU_LEFTBUS clocks src MUX ***************/ + /* CLK_SRC_LEFTBUS */ + clr = MUX_GDL_SEL(1) | MUX_MPLL_USER_SEL_L(1); + set = MUX_GDL_SEL(0) | MUX_MPLL_USER_SEL_L(1); + clrsetbits_le32(&clk->src_leftbus, clr, set); + + /* Wait for mux change */ + sdelay(0x30000); + + + /*************** Set CMU_RIGHTBUS clocks src MUX ***************/ + /* CLK_SRC_RIGHTBUS */ + clr = MUX_MPLL_USER_SEL_R(1) | MUX_GDR_SEL(1); + set = MUX_MPLL_USER_SEL_R(1) | MUX_GDR_SEL(0); + clrsetbits_le32(&clk->src_rightbus, clr, set); + + /* Wait for mux change */ + sdelay(0x30000); + + + /*************** Set CMU_TOP clocks src MUX ***************/ + /* CLK_SRC_TOP0 */ + clr = MUX_EPLL_SEL(1) | MUX_VPLL_SEL(1) | MUX_ACLK_200_SEL(1) | + MUX_ACLK_100_SEL(1) | MUX_ACLK_160_SEL(1) | + MUX_ACLK_133_SEL(1) | MUX_ONENAND_SEL(1) | MUX_ONENAND_1_SEL(1); + set = MUX_EPLL_SEL(1) | MUX_VPLL_SEL(1) | MUX_ACLK_200_SEL(0) | + MUX_ACLK_100_SEL(0) | MUX_ACLK_160_SEL(0) | + MUX_ACLK_133_SEL(0) | MUX_ONENAND_SEL(0) | MUX_ONENAND_1_SEL(0); + clrsetbits_le32(&clk->src_top0, clr, set); + + /* Wait for mux change */ + sdelay(0x30000); + + + /* CLK_SRC_TOP1 */ + clr = MUX_MPLL_USER_SEL_T(1) | MUX_ACLK_400_MCUISP_SEL(1) | + MUX_ACLK_400_MCUISP_SUB_SEL(1) | MUX_ACLK_200_SUB_SEL(1) | + MUX_ACLK_266_GPS_SEL(1) | MUX_ACLK_266_GPS_SUB_SEL(1); + + set = MUX_MPLL_USER_SEL_T(1) | MUX_ACLK_400_MCUISP_SEL(0) | + MUX_ACLK_400_MCUISP_SUB_SEL(1) | MUX_ACLK_200_SUB_SEL(1) | + MUX_ACLK_266_GPS_SEL(0) | MUX_ACLK_266_GPS_SUB_SEL(1); + clrsetbits_le32(&clk->src_top1, clr, set); + + /* Wait for mux change */ + sdelay(0x30000); + + + /*************** Set CMU_DMC clocks src MUX ***************/ + /* + * Set CMU_DMC clocks src to MPLL + * Bit values: 0 ; 1 + * MUX_C2C_SEL: SCLKMPLL ; SCLKAPLL + * MUX_DMC_BUS_SEL: SCLKMPLL ; SCLKAPLL + * MUX_DPHY_SEL: SCLKMPLL ; SCLKAPLL + * MUX_MPLL_SEL: FINPLL ; MOUT_MPLL_FOUT + * MUX_PWI_SEL: 0110 (MPLL); 0111 (EPLL); 1000 (VPLL); 0(XXTI) + * MUX_G2D_ACP0_SEL: SCLKMPLL ; SCLKAPLL + * MUX_G2D_ACP1_SEL: SCLKEPLL ; SCLKVPLL + * MUX_G2D_ACP_SEL: OUT_ACP0 ; OUT_ACP1 + */ + clr_src_dmc = MUX_C2C_SEL(1) | MUX_DMC_BUS_SEL(1) | + MUX_DPHY_SEL(1) | MUX_MPLL_SEL(1) | + MUX_PWI_SEL(15) | MUX_G2D_ACP0_SEL(1) | + MUX_G2D_ACP1_SEL(1) | MUX_G2D_ACP_SEL(1); + set = MUX_MPLL_SEL(1) | MUX_C2C_SEL(0) | MUX_DMC_BUS_SEL(0) | + MUX_DPHY_SEL(0) | MUX_PWI_SEL(6) | + MUX_G2D_ACP0_SEL(0) | MUX_G2D_ACP1_SEL(0) | MUX_G2D_ACP_SEL(0); + clrsetbits_le32(&clk->src_dmc, clr_src_dmc, set); + + /* Wait for mux change */ + while (readl(&clk->mux_stat_dmc) & MUX_STAT_DMC_CHANGING) + continue; + + /*************** Set CMU_CPU clocks src MUX ***************/ + /* Set CMU_CPU clocks src to APLL + * Bit values: 0 ; 1 + * MUX_APLL_SEL: FIN_PLL ; FOUT_APLL + * MUX_CORE_SEL: MOUT_APLL ; SCLK_MPLL + * MUX_HPM_SEL: MOUT_APLL ; SCLK_MPLL_USER_C + * MUX_MPLL_USER_SEL_C: FIN_PLL ; SCLK_MPLL + */ + clr_src_cpu = MUX_APLL_SEL(1) | MUX_CORE_SEL(1) | + MUX_HPM_SEL(1) | MUX_MPLL_USER_SEL_C(1); + set = MUX_APLL_SEL(1) | MUX_CORE_SEL(0) | MUX_HPM_SEL(0) | + MUX_MPLL_USER_SEL_C(1); + clrsetbits_le32(&clk->src_cpu, clr_src_cpu, set); + + /* Wait for mux change */ + while (readl(&clk->mux_stat_cpu) & MUX_STAT_CPU_CHANGING) + continue; +} diff --git a/arch/arm/mach-exynos/exynos4412_setup.h b/arch/arm/mach-exynos/exynos4412_setup.h new file mode 100644 index 0000000..a05301a --- /dev/null +++ b/arch/arm/mach-exynos/exynos4412_setup.h @@ -0,0 +1,350 @@ +/* + * Copyright (C) 2014 Samsung Electronics + * Przemyslaw Marczak <p.marczak@samsung.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __EXYNOS4412_SETUP__ +#define __EXYNOS4412_SETUP__ + +/* A/M/E/V PLL_CON0 */ +#define SDIV(x) ((x) & 0x7) +#define PDIV(x) (((x) & 0x3f) << 8) +#define MDIV(x) (((x) & 0x3ff) << 16) +#define FSEL(x) (((x) & 0x1) << 27) +#define PLL_LOCKED_BIT (0x1 << 29) +#define PLL_ENABLE(x) (((x) & 0x1) << 31) + +/* A/M PLL_CON1 */ +#define AFC(x) ((x) & 0xf) +#define LOCK_CON_DLY(x) (((x) & 0xf) << 8) +#define LOCK_CON_IN(x) (((x) & 0x3) << 12) +#define LOCK_CON_OUT(x) (((x) & 0x3) << 14) +#define FEED_EN(x) (((x) & 0x1) << 16) +#define AFC_ENB(x) (((x) & 0x1) << 20) +#define DCC_ENB(x) (((x) & 0x1) << 21) +#define BYPASS(x) (((x) & 0x1) << 22) +#define RESV0(x) (((x) & 0x1) << 23) +#define RESV1(x) (((x) & 0x1) << 24) + +/* E/V PLL_CON1 */ +#define K(x) ((x) & 0xffff) +#define MFR(x) (((x) & 0xff) << 16) +#define MRR(x) (((x) & 0x1f) << 24) +#define SEL_PF(x) (((x) & 0x3) << 9) + +/* E/V PLL_CON2 */ +#define ICP_BOOST(x) ((x) & 0x3) +#define FSEL_E_V(x) (((x) & 0x1) << 2) +#define FVCO_EN(x) (((x) & 0x1) << 3) +#define BYPASS_E_V(x) (((x) & 0x1) << 4) +#define SSCG_EN(x) (((x) & 0x1) << 5) +#define AFC_ENB_E_V(x) (((x) & 0x1) << 6) +#define DCC_ENB_E_V(x) (((x) & 0x1) << 7) +#define EXTAFC(x) (((x) & 0x1f) << 8) + +#define PLL_LOCKTIME(x) ((x) & 0xffff) + + +/* CLK_SRC_CPU */ +#define MUX_APLL_SEL(x) ((x) & 0x1) +#define MUX_CORE_SEL(x) (((x) & 0x1) << 16) +#define MUX_HPM_SEL(x) (((x) & 0x1) << 20) +#define MUX_MPLL_USER_SEL_C(x) (((x) & 0x1) << 24) + +#define MUX_STAT_CHANGING 0x100 + +/* CLK_MUX_STAT_CPU */ +#define APLL_SEL(x) ((x) & 0x7) +#define CORE_SEL(x) (((x) & 0x7) << 16) +#define HPM_SEL(x) (((x) & 0x7) << 20) +#define MPLL_USER_SEL_C(x) (((x) & 0x7) << 24) +#define MUX_STAT_CPU_CHANGING (APLL_SEL(MUX_STAT_CHANGING) | + CORE_SEL(MUX_STAT_CHANGING) | + HPM_SEL(MUX_STAT_CHANGING) | + MPLL_USER_SEL_C(MUX_STAT_CHANGING)) + +/* CLK_DIV_CPU0 */ +#define CORE_RATIO(x) ((x) & 0x7) +#define COREM0_RATIO(x) (((x) & 0x7) << 4) +#define COREM1_RATIO(x) (((x) & 0x7) << 8) +#define PERIPH_RATIO(x) (((x) & 0x7) << 12) +#define ATB_RATIO(x) (((x) & 0x7) << 16) +#define PCLK_DBG_RATIO(x) (((x) & 0x7) << 20) +#define APLL_RATIO(x) (((x) & 0x7) << 24) +#define CORE2_RATIO(x) (((x) & 0x7) << 28) + +/* CLK_DIV_STAT_CPU0 */ +#define DIV_CORE(x) ((x) & 0x1) +#define DIV_COREM0(x) (((x) & 0x1) << 4) +#define DIV_COREM1(x) (((x) & 0x1) << 8) +#define DIV_PERIPH(x) (((x) & 0x1) << 12) +#define DIV_ATB(x) (((x) & 0x1) << 16) +#define DIV_PCLK_DBG(x) (((x) & 0x1) << 20) +#define DIV_APLL(x) (((x) & 0x1) << 24) +#define DIV_CORE2(x) (((x) & 0x1) << 28) + +#define DIV_STAT_CHANGING 0x1 +#define DIV_STAT_CPU0_CHANGING (DIV_CORE(DIV_STAT_CHANGING) | + DIV_COREM0(DIV_STAT_CHANGING) | + DIV_COREM1(DIV_STAT_CHANGING) | + DIV_PERIPH(DIV_STAT_CHANGING) | + DIV_ATB(DIV_STAT_CHANGING) | + DIV_PCLK_DBG(DIV_STAT_CHANGING) | + DIV_APLL(DIV_STAT_CHANGING) | + DIV_CORE2(DIV_STAT_CHANGING)) + +/* CLK_DIV_CPU1 */ +#define COPY_RATIO(x) ((x) & 0x7) +#define HPM_RATIO(x) (((x) & 0x7) << 4) +#define CORES_RATIO(x) (((x) & 0x7) << 8) + +/* CLK_DIV_STAT_CPU1 */ +#define DIV_COPY(x) ((x) & 0x7) +#define DIV_HPM(x) (((x) & 0x1) << 4) +#define DIV_CORES(x) (((x) & 0x1) << 8) + +#define DIV_STAT_CPU1_CHANGING (DIV_COPY(DIV_STAT_CHANGING) | + DIV_HPM(DIV_STAT_CHANGING) | + DIV_CORES(DIV_STAT_CHANGING)) + +/* CLK_SRC_DMC */ +#define MUX_C2C_SEL(x) ((x) & 0x1) +#define MUX_DMC_BUS_SEL(x) (((x) & 0x1) << 4) +#define MUX_DPHY_SEL(x) (((x) & 0x1) << 8) +#define MUX_MPLL_SEL(x) (((x) & 0x1) << 12) +#define MUX_PWI_SEL(x) (((x) & 0xf) << 16) +#define MUX_G2D_ACP0_SEL(x) (((x) & 0x1) << 20) +#define MUX_G2D_ACP1_SEL(x) (((x) & 0x1) << 24) +#define MUX_G2D_ACP_SEL(x) (((x) & 0x1) << 28) + +/* CLK_MUX_STAT_DMC */ +#define C2C_SEL(x) (((x)) & 0x7) +#define DMC_BUS_SEL(x) (((x) & 0x7) << 4) +#define DPHY_SEL(x) (((x) & 0x7) << 8) +#define MPLL_SEL(x) (((x) & 0x7) << 12) +/* #define PWI_SEL(x) (((x) & 0xf) << 16) - Reserved */ +#define G2D_ACP0_SEL(x) (((x) & 0x7) << 20) +#define G2D_ACP1_SEL(x) (((x) & 0x7) << 24) +#define G2D_ACP_SEL(x) (((x) & 0x7) << 28) + +#define MUX_STAT_DMC_CHANGING (C2C_SEL(MUX_STAT_CHANGING) | + DMC_BUS_SEL(MUX_STAT_CHANGING) | + DPHY_SEL(MUX_STAT_CHANGING) | + MPLL_SEL(MUX_STAT_CHANGING) | + G2D_ACP0_SEL(MUX_STAT_CHANGING) | + G2D_ACP1_SEL(MUX_STAT_CHANGING) | + G2D_ACP_SEL(MUX_STAT_CHANGING)) + +/* CLK_DIV_DMC0 */ +#define ACP_RATIO(x) ((x) & 0x7) +#define ACP_PCLK_RATIO(x) (((x) & 0x7) << 4) +#define DPHY_RATIO(x) (((x) & 0x7) << 8) +#define DMC_RATIO(x) (((x) & 0x7) << 12) +#define DMCD_RATIO(x) (((x) & 0x7) << 16) +#define DMCP_RATIO(x) (((x) & 0x7) << 20) + +/* CLK_DIV_STAT_DMC0 */ +#define DIV_ACP(x) ((x) & 0x1) +#define DIV_ACP_PCLK(x) (((x) & 0x1) << 4) +#define DIV_DPHY(x) (((x) & 0x1) << 8) +#define DIV_DMC(x) (((x) & 0x1) << 12) +#define DIV_DMCD(x) (((x) & 0x1) << 16) +#define DIV_DMCP(x) (((x) & 0x1) << 20) + +#define DIV_STAT_DMC0_CHANGING (DIV_ACP(DIV_STAT_CHANGING) | + DIV_ACP_PCLK(DIV_STAT_CHANGING) | + DIV_DPHY(DIV_STAT_CHANGING) | + DIV_DMC(DIV_STAT_CHANGING) | + DIV_DMCD(DIV_STAT_CHANGING) | + DIV_DMCP(DIV_STAT_CHANGING)) + +/* CLK_DIV_DMC1 */ +#define G2D_ACP_RATIO(x) ((x) & 0xf) +#define C2C_RATIO(x) (((x) & 0x7) << 4) +#define PWI_RATIO(x) (((x) & 0xf) << 8) +#define C2C_ACLK_RATIO(x) (((x) & 0x7) << 12) +#define DVSEM_RATIO(x) (((x) & 0x7f) << 16) +#define DPM_RATIO(x) (((x) & 0x7f) << 24) + +/* CLK_DIV_STAT_DMC1 */ +#define DIV_G2D_ACP(x) ((x) & 0x1) +#define DIV_C2C(x) (((x) & 0x1) << 4) +#define DIV_PWI(x) (((x) & 0x1) << 8) +#define DIV_C2C_ACLK(x) (((x) & 0x1) << 12) +#define DIV_DVSEM(x) (((x) & 0x1) << 16) +#define DIV_DPM(x) (((x) & 0x1) << 24) + +#define DIV_STAT_DMC1_CHANGING (DIV_G2D_ACP(DIV_STAT_CHANGING) | + DIV_C2C(DIV_STAT_CHANGING) | + DIV_PWI(DIV_STAT_CHANGING) | + DIV_C2C_ACLK(DIV_STAT_CHANGING) | + DIV_DVSEM(DIV_STAT_CHANGING) | + DIV_DPM(DIV_STAT_CHANGING)) + +/* CLK_DIV_TOP */ +#define ACLK_400_MCUISP_RATIO(x) (((x) & 0x7) << 24) +#define ACLK_266_GPS_RATIO(x) (((x) & 0x7) << 20) +#define ONENAND_RATIO(x) (((x) & 0x7) << 16) +#define ACLK_133_RATIO(x) (((x) & 0x7) << 12) +#define ACLK_160_RATIO(x) (((x) & 0x7) << 8) +#define ACLK_100_RATIO(x) (((x) & 0xf) << 4) +#define ACLK_200_RATIO(x) ((x) & 0x7) + +#define DIV_STAT_TOP_CHANGING (ACLK_400_MCUISP_RATIO(DIV_STAT_CHANGING) | + ACLK_266_GPS_RATIO(DIV_STAT_CHANGING) | + ONENAND_RATIO(DIV_STAT_CHANGING) | + ACLK_133_RATIO(DIV_STAT_CHANGING) | + ACLK_160_RATIO(DIV_STAT_CHANGING) | + ACLK_100_RATIO(DIV_STAT_CHANGING) | + ACLK_200_RATIO(DIV_STAT_CHANGING)) + +/* CLK_SRC_TOP0 */ +#define MUX_ONENAND_SEL(x) (((x) & 0x1) << 28) +#define MUX_ACLK_133_SEL(x) (((x) & 0x1) << 24) +#define MUX_ACLK_160_SEL(x) (((x) & 0x1) << 20) +#define MUX_ACLK_100_SEL(x) (((x) & 0x1) << 16) +#define MUX_ACLK_200_SEL(x) (((x) & 0x1) << 12) +#define MUX_VPLL_SEL(x) (((x) & 0x1) << 8) +#define MUX_EPLL_SEL(x) (((x) & 0x1) << 4) +#define MUX_ONENAND_1_SEL(x) ((x) & 0x1) + +/* CLK_MUX_STAT_TOP */ +#define ONENAND_SEL(x) (((x) & 0x3) << 28) +#define ACLK_133_SEL(x) (((x) & 0x3) << 24) +#define ACLK_160_SEL(x) (((x) & 0x3) << 20) +#define ACLK_100_SEL(x) (((x) & 0x3) << 16) +#define ACLK_200_SEL(x) (((x) & 0x3) << 12) +#define VPLL_SEL(x) (((x) & 0x3) << 8) +#define EPLL_SEL(x) (((x) & 0x3) << 4) +#define ONENAND_1_SEL(x) ((x) & 0x3) + +/* CLK_SRC_TOP1 */ +#define MUX_ACLK_400_MCUISP_SUB_SEL(x) (((x) & 0x1) << 24) +#define MUX_ACLK_200_SUB_SEL(x) (((x) & 0x1) << 20) +#define MUX_ACLK_266_GPS_SUB_SEL(x) (((x) & 0x1) << 16) +#define MUX_MPLL_USER_SEL_T(x) (((x) & 0x1) << 12) +#define MUX_ACLK_400_MCUISP_SEL(x) (((x) & 0x1) << 8) +#define MUX_ACLK_266_GPS_SEL(x) (((x) & 0x1) << 4) + +/* CLK_MUX_STAT_TOP1 */ +#define ACLK_400_MCUISP_SUB_SEL(x) (((x) & 0x3) << 24) +#define ACLK_200_SUB_SEL(x) (((x) & 0x3) << 20) +#define ACLK_266_GPS_SUB_SEL(x) (((x) & 0x3) << 16) +#define MPLL_USER_SEL_T(x) (((x) & 0x3) << 12) +#define ACLK_400_MCUISP_SEL(x) (((x) & 0x3) << 8) +#define ACLK_266_GPS_SEL(x) (((x) & 0x3) << 4) + + + + + + +/*CLK_DIV_LEFTBUS*/ +#define GDL_RATIO(x) ((x) & 0x7) +#define GPL_RATIO(x) (((x) & 0x7) << 4) + +#define DIV_STAT_LEFTBUS_CHANGING (GDL_RATIO(DIV_STAT_CHANGING) | + GPL_RATIO(DIV_STAT_CHANGING) ) +/* CLK_SRC_LEFTBUS */ +#define MUX_MPLL_USER_SEL_L(x) (((x) & 0x1) << 4) +#define MUX_GDL_SEL(x) ((x) & 0x1) + +/* CLK_MUX_STAT_LEFTBUS */ +#define MPLL_USER_SEL_L(x) (((x) & 0x3) << 4) +#define GDL_SEL(x) ((x) & 0x3) + + +/*CLK_DIV_RIGHTBUS*/ +#define GDR_RATIO(x) ((x) & 0x7) +#define GPR_RATIO(x) (((x) & 0x7) << 4) + +#define DIV_STAT_RIGHTBUS_CHANGING (GDR_RATIO(DIV_STAT_CHANGING) | + GPR_RATIO(DIV_STAT_CHANGING) ) + +/* CLK_SRC_RIGHTBUS */ +#define MUX_MPLL_USER_SEL_R(x) (((x) & 0x1) << 4) +#define MUX_GDR_SEL(x) ((x) & 0x1) + +/* CLK_MUX_STAT_RIGHTBUS */ +#define MPLL_USER_SEL_R(x) (((x) & 0x3) << 4) +#define GDR_SEL(x) ((x) & 0x3) + + + + +/* Set CLK_SRC_PERIL0 */ +#define UART4_SEL(x) (((x) & 0xf) << 16) +#define UART3_SEL(x) (((x) & 0xf) << 12) +#define UART2_SEL(x) (((x) & 0xf) << 8) +#define UART1_SEL(x) (((x) & 0xf) << 4) +#define UART0_SEL(x) ((x) & 0xf) + +/* Set CLK_DIV_PERIL0 */ +#define UART4_RATIO(x) (((x) & 0xf) << 16) +#define UART3_RATIO(x) (((x) & 0xf) << 12) +#define UART2_RATIO(x) (((x) & 0xf) << 8) +#define UART1_RATIO(x) (((x) & 0xf) << 4) +#define UART0_RATIO(x) ((x) & 0xf) + +/* Set CLK_DIV_STAT_PERIL0 */ +#define DIV_UART4(x) (((x) & 0x1) << 16) +#define DIV_UART3(x) (((x) & 0x1) << 12) +#define DIV_UART2(x) (((x) & 0x1) << 8) +#define DIV_UART1(x) (((x) & 0x1) << 4) +#define DIV_UART0(x) ((x) & 0x1) + +#define DIV_STAT_PERIL0_CHANGING (DIV_UART4(DIV_STAT_CHANGING) | + DIV_UART3(DIV_STAT_CHANGING) | + DIV_UART2(DIV_STAT_CHANGING) | + DIV_UART1(DIV_STAT_CHANGING) | + DIV_UART0(DIV_STAT_CHANGING)) + +/* CLK_DIV_FSYS1 */ +#define MMC0_RATIO(x) ((x) & 0xf) +#define MMC0_PRE_RATIO(x) (((x) & 0xff) << 8) +#define MMC1_RATIO(x) (((x) & 0xf) << 16) +#define MMC1_PRE_RATIO(x) (((x) & 0xff) << 24) + +/* CLK_DIV_STAT_FSYS1 */ +#define DIV_MMC0(x) ((x) & 1) +#define DIV_MMC0_PRE(x) (((x) & 1) << 8) +#define DIV_MMC1(x) (((x) & 1) << 16) +#define DIV_MMC1_PRE(x) (((x) & 1) << 24) + +#define DIV_STAT_FSYS1_CHANGING (DIV_MMC0(DIV_STAT_CHANGING) | + DIV_MMC0_PRE(DIV_STAT_CHANGING) | + DIV_MMC1(DIV_STAT_CHANGING) | + DIV_MMC1_PRE(DIV_STAT_CHANGING)) + +/* CLK_DIV_FSYS2 */ +#define MMC2_RATIO(x) ((x) & 0xf) +#define MMC2_PRE_RATIO(x) (((x) & 0xff) << 8) +#define MMC3_RATIO(x) (((x) & 0xf) << 16) +#define MMC3_PRE_RATIO(x) (((x) & 0xff) << 24) + +/* CLK_DIV_STAT_FSYS2 */ +#define DIV_MMC2(x) ((x) & 0x1) +#define DIV_MMC2_PRE(x) (((x) & 0x1) << 8) +#define DIV_MMC3(x) (((x) & 0x1) << 16) +#define DIV_MMC3_PRE(x) (((x) & 0x1) << 24) + +#define DIV_STAT_FSYS2_CHANGING (DIV_MMC2(DIV_STAT_CHANGING) | + DIV_MMC2_PRE(DIV_STAT_CHANGING) | + DIV_MMC3(DIV_STAT_CHANGING) | + DIV_MMC3_PRE(DIV_STAT_CHANGING)) + +/* CLK_DIV_FSYS3 */ +#define MMC4_RATIO(x) ((x) & 0x7) +#define MMC4_PRE_RATIO(x) (((x) & 0xff) << 8) + +/* CLK_DIV_STAT_FSYS3 */ +#define DIV_MMC4(x) ((x) & 0x1) +#define DIV_MMC4_PRE(x) (((x) & 0x1) << 8) + +#define DIV_STAT_FSYS3_CHANGING (DIV_MMC4(DIV_STAT_CHANGING) | + DIV_MMC4_PRE(DIV_STAT_CHANGING)) + + +#endif /*__EXYNOS4412_SETUP__ */
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4、注意的问题
此次把ARMCLK设置为1400MHz，但是从tiny4412-1412的核心板原理图上来看，系统上电默认给ARM_CORE只提供1.0V~1.1V的电压，
从exynos4412芯片手册可以查到，在1.1V左右下，ARM核最高只能运行在1000MHz
问题点：这样设置会不会导致系统运行不稳定？
先把发现的问题点放在这，后期发现相关的问题再回过头来验证。
参考
1、《Exynos 4412 SCP_Users Manual_Ver.0.10.00_Preliminary.pdf》
2、《嵌入式Linux系统开发完全手册_基于4412_上册.pdf》
3、http://www.cnblogs.com/humaoxiao/p/4225320.html