xref: /openbmc/linux/drivers/soc/samsung/exynos5420-pmu.c (revision ee55ae6194a5439bde3a3b8ee0abda63c610e740)

/*
 * Copyright (c) 2011-2015 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com/
 *
 * EXYNOS5420 - CPU PMU (Power Management Unit) support
 *
 * 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.
 */

#include <linux/pm.h>
#include <linux/soc/samsung/exynos-regs-pmu.h>
#include <linux/soc/samsung/exynos-pmu.h>

#include <asm/cputype.h>

#include "exynos-pmu.h"

static const struct exynos_pmu_conf exynos5420_pmu_config[] = {
	/* { .offset = offset, .val = { AFTR, LPA, SLEEP } */
	{ EXYNOS5_ARM_CORE0_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_DIS_IRQ_ARM_CORE0_LOCAL_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_DIS_IRQ_ARM_CORE0_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5_ARM_CORE1_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_DIS_IRQ_ARM_CORE1_LOCAL_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_DIS_IRQ_ARM_CORE1_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_ARM_CORE2_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_ARM_CORE2_LOCAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_ARM_CORE2_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_ARM_CORE3_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_ARM_CORE3_LOCAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_ARM_CORE3_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_KFC_CORE0_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_KFC_CORE0_LOCAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_KFC_CORE0_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_KFC_CORE1_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_KFC_CORE1_LOCAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_KFC_CORE1_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_KFC_CORE2_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_KFC_CORE2_LOCAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_KFC_CORE2_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_KFC_CORE3_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_KFC_CORE3_LOCAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5420_DIS_IRQ_KFC_CORE3_CENTRAL_SYS_PWR_REG, { 0x0, 0x0, 0x0} },
	{ EXYNOS5_ISP_ARM_SYS_PWR_REG,			{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_DIS_IRQ_ISP_ARM_LOCAL_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_DIS_IRQ_ISP_ARM_CENTRAL_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_ARM_COMMON_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_KFC_COMMON_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_ARM_L2_SYS_PWR_REG,			{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_KFC_L2_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_ACLKSTOP_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_CMU_SCLKSTOP_SYS_PWR_REG,		{ 0x1, 0x0, 0x1} },
	{ EXYNOS5_CMU_RESET_SYS_PWR_REG,		{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_CMU_ACLKSTOP_SYSMEM_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_CMU_SCLKSTOP_SYSMEM_SYS_PWR_REG,	{ 0x1, 0x0, 0x1} },
	{ EXYNOS5_CMU_RESET_SYSMEM_SYS_PWR_REG,		{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_DRAM_FREQ_DOWN_SYS_PWR_REG,		{ 0x1, 0x0, 0x1} },
	{ EXYNOS5_DDRPHY_DLLOFF_SYS_PWR_REG,		{ 0x1, 0x1, 0x1} },
	{ EXYNOS5_DDRPHY_DLLLOCK_SYS_PWR_REG,		{ 0x1, 0x0, 0x1} },
	{ EXYNOS5_APLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_MPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_VPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_EPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_BPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_CPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_DPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_IPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_KPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_MPLLUSER_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_BPLLUSER_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_RPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_SPLL_SYSCLK_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_TOP_BUS_SYS_PWR_REG,			{ 0x3, 0x0, 0x0} },
	{ EXYNOS5_TOP_RETENTION_SYS_PWR_REG,		{ 0x1, 0x1, 0x1} },
	{ EXYNOS5_TOP_PWR_SYS_PWR_REG,			{ 0x3, 0x3, 0x0} },
	{ EXYNOS5_TOP_BUS_SYSMEM_SYS_PWR_REG,		{ 0x3, 0x0, 0x0} },
	{ EXYNOS5_TOP_RETENTION_SYSMEM_SYS_PWR_REG,	{ 0x1, 0x0, 0x1} },
	{ EXYNOS5_TOP_PWR_SYSMEM_SYS_PWR_REG,		{ 0x3, 0x0, 0x0} },
	{ EXYNOS5_LOGIC_RESET_SYS_PWR_REG,		{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_OSCCLK_GATE_SYS_PWR_REG,		{ 0x1, 0x0, 0x1} },
	{ EXYNOS5_LOGIC_RESET_SYSMEM_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_OSCCLK_GATE_SYSMEM_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_INTRAM_MEM_SYS_PWR_REG,		{ 0x3, 0x0, 0x3} },
	{ EXYNOS5420_INTROM_MEM_SYS_PWR_REG,		{ 0x3, 0x0, 0x3} },
	{ EXYNOS5_PAD_RETENTION_DRAM_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_PAD_RETENTION_MAU_SYS_PWR_REG,	{ 0x1, 0x1, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_JTAG_SYS_PWR_REG,	{ 0x1, 0x1, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_DRAM_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_UART_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_MMC0_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_MMC1_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_MMC2_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_HSI_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_EBIA_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_EBIB_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_SPI_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5420_PAD_RETENTION_DRAM_COREBLK_SYS_PWR_REG, { 0x1, 0x0, 0x0} },
	{ EXYNOS5_PAD_ISOLATION_SYS_PWR_REG,		{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_PAD_ISOLATION_SYSMEM_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_PAD_ALV_SEL_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_XUSBXTI_SYS_PWR_REG,			{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_XXTI_SYS_PWR_REG,			{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_EXT_REGULATOR_SYS_PWR_REG,		{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_GPIO_MODE_SYS_PWR_REG,		{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_GPIO_MODE_SYSMEM_SYS_PWR_REG,		{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_GPIO_MODE_MAU_SYS_PWR_REG,		{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_TOP_ASB_RESET_SYS_PWR_REG,		{ 0x1, 0x1, 0x0} },
	{ EXYNOS5_TOP_ASB_ISOLATION_SYS_PWR_REG,	{ 0x1, 0x0, 0x0} },
	{ EXYNOS5_GSCL_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5_ISP_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5_MFC_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5_G3D_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5420_DISP1_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5420_MAU_SYS_PWR_REG,			{ 0x7, 0x7, 0x0} },
	{ EXYNOS5420_G2D_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5420_MSC_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5420_FSYS_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5420_FSYS2_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5420_PSGEN_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5420_PERIC_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5420_WCORE_SYS_PWR_REG,			{ 0x7, 0x0, 0x0} },
	{ EXYNOS5_CMU_CLKSTOP_GSCL_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_CLKSTOP_ISP_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_CLKSTOP_MFC_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_CLKSTOP_G3D_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_CLKSTOP_DISP1_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_CLKSTOP_MAU_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_CLKSTOP_G2D_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_CLKSTOP_MSC_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_CLKSTOP_FSYS_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_CLKSTOP_PSGEN_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_CLKSTOP_PERIC_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_CLKSTOP_WCORE_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_SYSCLK_GSCL_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_SYSCLK_ISP_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_SYSCLK_MFC_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_SYSCLK_G3D_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_SYSCLK_DISP1_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_SYSCLK_MAU_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_SYSCLK_G2D_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_SYSCLK_MSC_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_SYSCLK_FSYS_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_SYSCLK_FSYS2_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_SYSCLK_PSGEN_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_SYSCLK_PERIC_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_SYSCLK_WCORE_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_RESET_FSYS2_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_RESET_PSGEN_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_RESET_PERIC_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_RESET_WCORE_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_RESET_GSCL_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_RESET_ISP_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_RESET_MFC_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5_CMU_RESET_G3D_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_RESET_DISP1_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_RESET_MAU_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_RESET_G2D_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_RESET_MSC_SYS_PWR_REG,		{ 0x0, 0x0, 0x0} },
	{ EXYNOS5420_CMU_RESET_FSYS_SYS_PWR_REG,	{ 0x0, 0x0, 0x0} },
	{ PMU_TABLE_END,},
};

static unsigned int const exynos5420_list_disable_pmu_reg[] = {
	EXYNOS5_CMU_CLKSTOP_GSCL_SYS_PWR_REG,
	EXYNOS5_CMU_CLKSTOP_ISP_SYS_PWR_REG,
	EXYNOS5_CMU_CLKSTOP_G3D_SYS_PWR_REG,
	EXYNOS5420_CMU_CLKSTOP_DISP1_SYS_PWR_REG,
	EXYNOS5420_CMU_CLKSTOP_MAU_SYS_PWR_REG,
	EXYNOS5420_CMU_CLKSTOP_G2D_SYS_PWR_REG,
	EXYNOS5420_CMU_CLKSTOP_MSC_SYS_PWR_REG,
	EXYNOS5420_CMU_CLKSTOP_FSYS_SYS_PWR_REG,
	EXYNOS5420_CMU_CLKSTOP_PSGEN_SYS_PWR_REG,
	EXYNOS5420_CMU_CLKSTOP_PERIC_SYS_PWR_REG,
	EXYNOS5420_CMU_CLKSTOP_WCORE_SYS_PWR_REG,
	EXYNOS5_CMU_SYSCLK_GSCL_SYS_PWR_REG,
	EXYNOS5_CMU_SYSCLK_ISP_SYS_PWR_REG,
	EXYNOS5_CMU_SYSCLK_G3D_SYS_PWR_REG,
	EXYNOS5420_CMU_SYSCLK_DISP1_SYS_PWR_REG,
	EXYNOS5420_CMU_SYSCLK_MAU_SYS_PWR_REG,
	EXYNOS5420_CMU_SYSCLK_G2D_SYS_PWR_REG,
	EXYNOS5420_CMU_SYSCLK_MSC_SYS_PWR_REG,
	EXYNOS5420_CMU_SYSCLK_FSYS_SYS_PWR_REG,
	EXYNOS5420_CMU_SYSCLK_FSYS2_SYS_PWR_REG,
	EXYNOS5420_CMU_SYSCLK_PSGEN_SYS_PWR_REG,
	EXYNOS5420_CMU_SYSCLK_PERIC_SYS_PWR_REG,
	EXYNOS5420_CMU_SYSCLK_WCORE_SYS_PWR_REG,
	EXYNOS5420_CMU_RESET_FSYS2_SYS_PWR_REG,
	EXYNOS5420_CMU_RESET_PSGEN_SYS_PWR_REG,
	EXYNOS5420_CMU_RESET_PERIC_SYS_PWR_REG,
	EXYNOS5420_CMU_RESET_WCORE_SYS_PWR_REG,
	EXYNOS5_CMU_RESET_GSCL_SYS_PWR_REG,
	EXYNOS5_CMU_RESET_ISP_SYS_PWR_REG,
	EXYNOS5_CMU_RESET_G3D_SYS_PWR_REG,
	EXYNOS5420_CMU_RESET_DISP1_SYS_PWR_REG,
	EXYNOS5420_CMU_RESET_MAU_SYS_PWR_REG,
	EXYNOS5420_CMU_RESET_G2D_SYS_PWR_REG,
	EXYNOS5420_CMU_RESET_MSC_SYS_PWR_REG,
	EXYNOS5420_CMU_RESET_FSYS_SYS_PWR_REG,
};

static void exynos5420_powerdown_conf(enum sys_powerdown mode)
{
	u32 this_cluster;

	this_cluster = MPIDR_AFFINITY_LEVEL(read_cpuid_mpidr(), 1);

	/*
	 * set the cluster id to IROM register to ensure that we wake
	 * up with the current cluster.
	 */
	pmu_raw_writel(this_cluster, EXYNOS_IROM_DATA2);
}

static void exynos5420_pmu_init(void)
{
	unsigned int value;
	int i;

	/*
	 * Set the CMU_RESET, CMU_SYSCLK and CMU_CLKSTOP registers
	 * for local power blocks to Low initially as per Table 8-4:
	 * "System-Level Power-Down Configuration Registers".
	 */
	for (i = 0; i < ARRAY_SIZE(exynos5420_list_disable_pmu_reg); i++)
		pmu_raw_writel(0, exynos5420_list_disable_pmu_reg[i]);

	/* Enable USE_STANDBY_WFI for all CORE */
	pmu_raw_writel(EXYNOS5420_USE_STANDBY_WFI_ALL, S5P_CENTRAL_SEQ_OPTION);

	value  = pmu_raw_readl(EXYNOS_L2_OPTION(0));
	value &= ~EXYNOS_L2_USE_RETENTION;
	pmu_raw_writel(value, EXYNOS_L2_OPTION(0));

	value = pmu_raw_readl(EXYNOS_L2_OPTION(1));
	value &= ~EXYNOS_L2_USE_RETENTION;
	pmu_raw_writel(value, EXYNOS_L2_OPTION(1));

	/*
	 * If L2_COMMON is turned off, clocks related to ATB async
	 * bridge are gated. Thus, when ISP power is gated, LPI
	 * may get stuck.
	 */
	value = pmu_raw_readl(EXYNOS5420_LPI_MASK);
	value |= EXYNOS5420_ATB_ISP_ARM;
	pmu_raw_writel(value, EXYNOS5420_LPI_MASK);

	value  = pmu_raw_readl(EXYNOS5420_LPI_MASK1);
	value |= EXYNOS5420_ATB_KFC;
	pmu_raw_writel(value, EXYNOS5420_LPI_MASK1);

	/* Prevent issue of new bus request from L2 memory */
	value = pmu_raw_readl(EXYNOS5420_ARM_COMMON_OPTION);
	value |= EXYNOS5_SKIP_DEACTIVATE_ACEACP_IN_PWDN;
	pmu_raw_writel(value, EXYNOS5420_ARM_COMMON_OPTION);

	value = pmu_raw_readl(EXYNOS5420_KFC_COMMON_OPTION);
	value |= EXYNOS5_SKIP_DEACTIVATE_ACEACP_IN_PWDN;
	pmu_raw_writel(value, EXYNOS5420_KFC_COMMON_OPTION);

	/* This setting is to reduce suspend/resume time */
	pmu_raw_writel(DUR_WAIT_RESET, EXYNOS5420_LOGIC_RESET_DURATION3);

	/* Serialized CPU wakeup of Eagle */
	pmu_raw_writel(SPREAD_ENABLE, EXYNOS5420_ARM_INTR_SPREAD_ENABLE);

	pmu_raw_writel(SPREAD_USE_STANDWFI,
			EXYNOS5420_ARM_INTR_SPREAD_USE_STANDBYWFI);

	pmu_raw_writel(0x1, EXYNOS5420_UP_SCHEDULER);

	pr_info("EXYNOS5420 PMU initialized\n");
}

const struct exynos_pmu_data exynos5420_pmu_data = {
	.pmu_config	= exynos5420_pmu_config,
	.pmu_init	= exynos5420_pmu_init,
	.powerdown_conf	= exynos5420_powerdown_conf,
};