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/*
* arch/arm/mach-tegra/include/mach/clock.h
*
* Copyright (C) 2010 Google, Inc.
*
* Author:
* Colin Cross <ccross@google.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*
*/
#ifndef __MACH_TEGRA_CLOCK_H
#define __MACH_TEGRA_CLOCK_H
#include <linux/list.h>
#include <linux/clkdev.h>
#define DIV_BUS (1 << 0)
#define DIV_U71 (1 << 1)
#define DIV_U71_FIXED (1 << 2)
#define DIV_2 (1 << 3)
#define DIV_U16 (1 << 4)
#define PLL_FIXED (1 << 5)
#define PLL_HAS_CPCON (1 << 6)
#define MUX (1 << 7)
#define PLLD (1 << 8)
#define PERIPH_NO_RESET (1 << 9)
#define PERIPH_NO_ENB (1 << 10)
#define PERIPH_EMC_ENB (1 << 11)
#define PERIPH_MANUAL_RESET (1 << 12)
#define PLL_ALT_MISC_REG (1 << 13)
#define PLLU (1 << 14)
#define ENABLE_ON_INIT (1 << 28)
struct clk;
struct regulator;
struct dvfs_table {
unsigned long rate;
int millivolts;
};
struct dvfs_process_id_table {
int process_id;
struct dvfs_table *table;
};
struct dvfs {
struct regulator *reg;
struct dvfs_table *table;
int max_millivolts;
int process_id_table_length;
const char *reg_id;
bool cpu;
struct dvfs_process_id_table process_id_table[];
};
struct clk_mux_sel {
struct clk *input;
u32 value;
};
struct clk_pll_table {
unsigned long input_rate;
unsigned long output_rate;
u16 n;
u16 m;
u8 p;
u8 cpcon;
};
struct clk_ops {
void (*init)(struct clk *);
int (*enable)(struct clk *);
void (*disable)(struct clk *);
int (*set_parent)(struct clk *, struct clk *);
int (*set_rate)(struct clk *, unsigned long);
long (*round_rate)(struct clk *, unsigned long);
};
enum clk_state {
UNINITIALIZED = 0,
ON,
OFF,
};
struct clk {
/* node for master clocks list */
struct list_head node;
struct list_head children; /* list of children */
struct list_head sibling; /* node for children */
#ifdef CONFIG_DEBUG_FS
struct dentry *dent;
struct dentry *parent_dent;
#endif
struct clk_ops *ops;
struct clk *parent;
struct clk_lookup lookup;
unsigned long rate;
unsigned long max_rate;
u32 flags;
u32 refcnt;
const char *name;
u32 reg;
u32 reg_shift;
unsigned int clk_num;
enum clk_state state;
#ifdef CONFIG_DEBUG_FS
bool set;
#endif
/* PLL */
unsigned long input_min;
unsigned long input_max;
unsigned long cf_min;
unsigned long cf_max;
unsigned long vco_min;
unsigned long vco_max;
const struct clk_pll_table *pll_table;
/* DIV */
u32 div;
u32 mul;
/* MUX */
const struct clk_mux_sel *inputs;
u32 sel;
u32 reg_mask;
/* Virtual cpu clock */
struct clk *main;
struct clk *backup;
struct dvfs *dvfs;
};
struct clk_duplicate {
const char *name;
struct clk_lookup lookup;
};
struct tegra_clk_init_table {
const char *name;
const char *parent;
unsigned long rate;
bool enabled;
};
void tegra2_init_clocks(void);
void tegra2_periph_reset_deassert(struct clk *c);
void tegra2_periph_reset_assert(struct clk *c);
void clk_init(struct clk *clk);
struct clk *tegra_get_clock_by_name(const char *name);
unsigned long clk_measure_input_freq(void);
void clk_disable_locked(struct clk *c);
int clk_enable_locked(struct clk *c);
int clk_set_parent_locked(struct clk *c, struct clk *parent);
int clk_set_rate_locked(struct clk *c, unsigned long rate);
int clk_reparent(struct clk *c, struct clk *parent);
void tegra_clk_init_from_table(struct tegra_clk_init_table *table);
#endif
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