path: root/drivers/clk/samsung/clk-exynos4.c

/*
 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
 * Copyright (c) 2013 Linaro Ltd.
 * Author: Thomas Abraham <thomas.ab@samsung.com>
 *
 * 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.
 *
 * Common Clock Framework support for all Exynos4 SoCs.
*/

#include <dt-bindings/clock/exynos4.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/syscore_ops.h>

#include "clk.h"

/* Exynos4 clock controller register offsets */
#define SRC_LEFTBUS		0x4200
#define DIV_LEFTBUS		0x4500
#define GATE_IP_LEFTBUS		0x4800
#define E4X12_GATE_IP_IMAGE	0x4930
#define SRC_RIGHTBUS		0x8200
#define DIV_RIGHTBUS		0x8500
#define GATE_IP_RIGHTBUS	0x8800
#define E4X12_GATE_IP_PERIR	0x8960
#define EPLL_LOCK		0xc010
#define VPLL_LOCK		0xc020
#define EPLL_CON0		0xc110
#define EPLL_CON1		0xc114
#define EPLL_CON2		0xc118
#define VPLL_CON0		0xc120
#define VPLL_CON1		0xc124
#define VPLL_CON2		0xc128
#define SRC_TOP0		0xc210
#define SRC_TOP1		0xc214
#define SRC_CAM			0xc220
#define SRC_TV			0xc224
#define SRC_MFC			0xc228
#define SRC_G3D			0xc22c
#define E4210_SRC_IMAGE		0xc230
#define SRC_LCD0		0xc234
#define E4210_SRC_LCD1		0xc238
#define E4X12_SRC_ISP		0xc238
#define SRC_MAUDIO		0xc23c
#define SRC_FSYS		0xc240
#define SRC_PERIL0		0xc250
#define SRC_PERIL1		0xc254
#define E4X12_SRC_CAM1		0xc258
#define SRC_MASK_TOP		0xc310
#define SRC_MASK_CAM		0xc320
#define SRC_MASK_TV		0xc324
#define SRC_MASK_LCD0		0xc334
#define E4210_SRC_MASK_LCD1	0xc338
#define E4X12_SRC_MASK_ISP	0xc338
#define SRC_MASK_MAUDIO		0xc33c
#define SRC_MASK_FSYS		0xc340
#define SRC_MASK_PERIL0		0xc350
#define SRC_MASK_PERIL1		0xc354
#define DIV_TOP			0xc510
#define DIV_CAM			0xc520
#define DIV_TV			0xc524
#define DIV_MFC			0xc528
#define DIV_G3D			0xc52c
#define DIV_IMAGE		0xc530
#define DIV_LCD0		0xc534
#define E4210_DIV_LCD1		0xc538
#define E4X12_DIV_ISP		0xc538
#define DIV_MAUDIO		0xc53c
#define DIV_FSYS0		0xc540
#define DIV_FSYS1		0xc544
#define DIV_FSYS2		0xc548
#define DIV_FSYS3		0xc54c
#define DIV_PERIL0		0xc550
#define DIV_PERIL1		0xc554
#define DIV_PERIL2		0xc558
#define DIV_PERIL3		0xc55c
#define DIV_PERIL4		0xc560
#define DIV_PERIL5		0xc564
#define E4X12_DIV_CAM1		0xc568
#define GATE_SCLK_CAM		0xc820
#define GATE_IP_CAM		0xc920
#define GATE_IP_TV		0xc924
#define GATE_IP_MFC		0xc928
#define GATE_IP_G3D		0xc92c
#define E4210_GATE_IP_IMAGE	0xc930
#define GATE_IP_LCD0		0xc934
#define E4210_GATE_IP_LCD1	0xc938
#define E4X12_GATE_IP_ISP	0xc938
#define E4X12_GATE_IP_MAUDIO	0xc93c
#define GATE_IP_FSYS		0xc940
#define GATE_IP_GPS		0xc94c
#define GATE_IP_PERIL		0xc950
#define E4210_GATE_IP_PERIR	0xc960
#define GATE_BLOCK		0xc970
#define E4X12_MPLL_LOCK		0x10008
#define E4X12_MPLL_CON0		0x10108
#define SRC_DMC			0x10200
#define SRC_MASK_DMC		0x10300
#define DIV_DMC0		0x10500
#define DIV_DMC1		0x10504
#define GATE_IP_DMC		0x10900
#define APLL_LOCK		0x14000
#define E4210_MPLL_LOCK		0x14008
#define APLL_CON0		0x14100
#define E4210_MPLL_CON0		0x14108
#define SRC_CPU			0x14200
#define DIV_CPU0		0x14500
#define DIV_CPU1		0x14504
#define GATE_SCLK_CPU		0x14800
#define GATE_IP_CPU		0x14900
#define E4X12_DIV_ISP0		0x18300
#define E4X12_DIV_ISP1		0x18304
#define E4X12_GATE_ISP0		0x18800
#define E4X12_GATE_ISP1		0x18804

/* the exynos4 soc type */
enum exynos4_soc {
	EXYNOS4210,
	EXYNOS4X12,
};

/* list of PLLs to be registered */
enum exynos4_plls {
	apll, mpll, epll, vpll,
	nr_plls			/* number of PLLs */
};

static void __iomem *reg_base;
static enum exynos4_soc exynos4_soc;

/*
 * Support for CMU save/restore across system suspends
 */
#ifdef CONFIG_PM_SLEEP
static struct samsung_clk_reg_dump *exynos4_save_common;
static struct samsung_clk_reg_dump *exynos4_save_soc;
static struct samsung_clk_reg_dump *exynos4_save_pll;

/*
 * list of controller registers to be saved and restored during a
 * suspend/resume cycle.
 */
static unsigned long exynos4210_clk_save[] __initdata = {
	E4210_SRC_IMAGE,
	E4210_SRC_LCD1,
	E4210_SRC_MASK_LCD1,
	E4210_DIV_LCD1,
	E4210_GATE_IP_IMAGE,
	E4210_GATE_IP_LCD1,
	E4210_GATE_IP_PERIR,
	E4210_MPLL_CON0,
};

static unsigned long exynos4x12_clk_save[] __initdata = {
	E4X12_GATE_IP_IMAGE,
	E4X12_GATE_IP_PERIR,
	E4X12_SRC_CAM1,
	E4X12_DIV_ISP,
	E4X12_DIV_CAM1,
	E4X12_MPLL_CON0,
};

static unsigned long exynos4_clk_pll_regs[] __initdata = {
	EPLL_LOCK,
	VPLL_LOCK,
	EPLL_CON0,
	EPLL_CON1,
	EPLL_CON2,
	VPLL_CON0,
	VPLL_CON1,
	VPLL_CON2,
};

static unsigned long exynos4_clk_regs[] __initdata = {
	SRC_LEFTBUS,
	DIV_LEFTBUS,
	GATE_IP_LEFTBUS,
	SRC_RIGHTBUS,
	DIV_RIGHTBUS,
	GATE_IP_RIGHTBUS,
	SRC_T