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/*
* TI DaVinci clock definitions
*
* Copyright (C) 2006-2007 Texas Instruments.
* Copyright (C) 2008-2009 Deep Root Systems, LLC
*
* 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.
*/
#ifndef __ARCH_ARM_DAVINCI_CLOCK_H
#define __ARCH_ARM_DAVINCI_CLOCK_H
#define DAVINCI_PLL1_BASE 0x01c40800
#define DAVINCI_PLL2_BASE 0x01c40c00
#define MAX_PLL 2
/* PLL/Reset register offsets */
#define PLLCTL 0x100
#define PLLCTL_PLLEN BIT(0)
#define PLLCTL_PLLPWRDN BIT(1)
#define PLLCTL_PLLRST BIT(3)
#define PLLCTL_PLLDIS BIT(4)
#define PLLCTL_PLLENSRC BIT(5)
#define PLLCTL_CLKMODE BIT(8)
#define PLLM 0x110
#define PLLM_PLLM_MASK 0xff
#define PREDIV 0x114
#define PLLDIV1 0x118
#define PLLDIV2 0x11c
#define PLLDIV3 0x120
#define POSTDIV 0x128
#define BPDIV 0x12c
#define PLLCMD 0x138
#define PLLSTAT 0x13c
#define PLLALNCTL 0x140
#define PLLDCHANGE 0x144
#define PLLCKEN 0x148
#define PLLCKSTAT 0x14c
#define PLLSYSTAT 0x150
#define PLLDIV4 0x160
#define PLLDIV5 0x164
#define PLLDIV6 0x168
#define PLLDIV7 0x16c
#define PLLDIV8 0x170
#define PLLDIV9 0x174
#define PLLDIV_EN BIT(15)
#define PLLDIV_RATIO_MASK 0x1f
/*
* OMAP-L138 system reference guide recommends a wait for 4 OSCIN/CLKIN
* cycles to ensure that the PLLC has switched to bypass mode. Delay of 1us
* ensures we are good for all > 4MHz OSCIN/CLKIN inputs. Typically the input
* is ~25MHz. Units are micro seconds.
*/
#define PLL_BYPASS_TIME 1
/* From OMAP-L138 datasheet table 6-4. Units are micro seconds */
#define PLL_RESET_TIME 1
/*
* From OMAP-L138 datasheet table 6-4; assuming prediv = 1, sqrt(pllm) = 4
* Units are micro seconds.
*/
#define PLL_LOCK_TIME 20
#ifndef __ASSEMBLER__
#include <linux/list.h>
#include <linux/clkdev.h>
#define PLLSTAT_GOSTAT BIT(0)
#define PLLCMD_GOSET BIT(0)
struct pll_data {
u32 phys_base;
void __iomem *base;
u32 num;
u32 flags;
u32 input_rate;
u32 div_ratio_mask;
};
#define PLL_HAS_PREDIV 0x01
#define PLL_HAS_POSTDIV 0x02
struct clk {
struct list_head node;
struct module *owner;
const char *name;
unsigned long rate;
unsigned long maxrate; /* H/W supported max rate */
u8 usecount;
u8 lpsc;
u8 gpsc;
u8 domain;
u32 flags;
struct clk *parent;
struct list_head children; /* list of children */
struct list_head childnode; /* parent's child list node */
struct pll_data *pll_data;
u32 div_reg;
unsigned long (*recalc) (struct clk *);
int (*set_rate) (struct clk *clk, unsigned long rate);
int (*round_rate) (struct clk *clk, unsigned long rate);
int (*reset) (struct clk *clk, bool reset);
};
/* Clock flags: SoC-specific flags start at BIT(16) */
#define ALWAYS_ENABLED BIT(1)
#define CLK_PSC BIT(2)
#define CLK_PLL BIT(3) /* PLL-derived clock */
#define PRE_PLL BIT(4) /* source is before PLL mult/div */
#define PSC_SWRSTDISABLE BIT(5) /* Disable state is SwRstDisable */
#define PSC_FORCE BIT(6) /* Force module state transtition */
#define PSC_LRST BIT(8) /* Use local reset on enable/disable */
#define CLK(dev, con, ck) \
{ \
.dev_id = dev, \
.con_id = con, \
.clk = ck, \
} \
int davinci_clk_init(struct clk_lookup *clocks);
int davinci_set_pllrate(struct pll_data *pll, unsigned int prediv,
unsigned int mult, unsigned int postdiv);
int davinci_set_sysclk_rate(struct clk *clk, unsigned long rate);
int davinci_set_refclk_rate(unsigned long rate);
int davinci_simple_set_rate(struct clk *clk, unsigned long rate);
int davinci_clk_reset(struct clk *clk, bool reset);
extern struct platform_device davinci_wdt_device;
extern void davinci_watchdog_reset(struct platform_device *);
#endif
#endif
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