2
* OMAP Voltage Management Routines
4
* Author: Thara Gopinath <thara@ti.com>
6
* Copyright (C) 2009 Texas Instruments, Inc.
7
* Thara Gopinath <thara@ti.com>
9
* This program is free software; you can redistribute it and/or modify
10
* it under the terms of the GNU General Public License version 2 as
11
* published by the Free Software Foundation.
14
#ifndef __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
15
#define __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
17
#include <linux/err.h>
25
#define VOLTSCALE_VPFORCEUPDATE 1
26
#define VOLTSCALE_VCBYPASS 2
29
* OMAP3 GENERIC setup times. Revisit to see if these needs to be
30
* passed from board or PMIC file
32
#define OMAP3_CLKSETUP 0xff
33
#define OMAP3_VOLTOFFSET 0xff
34
#define OMAP3_VOLTSETUP2 0xff
37
* struct omap_vfsm_instance - per-voltage manager FSM register/bitfield
39
* @voltsetup_mask: SETUP_TIME* bitmask in the PRM_VOLTSETUP* register
40
* @voltsetup_reg: register offset of PRM_VOLTSETUP from PRM base
42
* XXX What about VOLTOFFSET/VOLTCTRL?
44
struct omap_vfsm_instance {
50
* struct voltagedomain - omap voltage domain global structure.
51
* @name: Name of the voltage domain which can be used as a unique identifier.
52
* @scalable: Whether or not this voltage domain is scalable
53
* @node: list_head linking all voltage domains
54
* @pwrdm_list: list_head linking all powerdomains in this voltagedomain
55
* @vc: pointer to VC channel associated with this voltagedomain
56
* @vp: pointer to VP associated with this voltagedomain
57
* @read: read a VC/VP register
58
* @write: write a VC/VP register
59
* @read: read-modify-write a VC/VP register
60
* @sys_clk: system clock name/frequency, used for various timing calculations
61
* @scale: function used to scale the voltage of the voltagedomain
62
* @nominal_volt: current nominal voltage for this voltage domain
63
* @volt_data: voltage table having the distinct voltages supported
64
* by the domain and other associated per voltage data.
66
struct voltagedomain {
69
struct list_head node;
70
struct list_head pwrdm_list;
71
struct omap_vc_channel *vc;
72
const struct omap_vfsm_instance *vfsm;
73
struct omap_vp_instance *vp;
74
struct omap_voltdm_pmic *pmic;
76
/* VC/VP register access functions: SoC specific */
77
u32 (*read) (u8 offset);
78
void (*write) (u32 val, u8 offset);
79
u32 (*rmw)(u32 mask, u32 bits, u8 offset);
86
int (*scale) (struct voltagedomain *voltdm,
87
unsigned long target_volt);
90
struct omap_volt_data *volt_data;
94
* struct omap_volt_data - Omap voltage specific data.
95
* @voltage_nominal: The possible voltage value in uV
96
* @sr_efuse_offs: The offset of the efuse register(from system
97
* control module base address) from where to read
98
* the n-target value for the smartreflex module.
99
* @sr_errminlimit: Error min limit value for smartreflex. This value
100
* differs at differnet opp and thus is linked
102
* @vp_errorgain: Error gain value for the voltage processor. This
103
* field also differs according to the voltage/opp.
105
struct omap_volt_data {
113
* struct omap_voltdm_pmic - PMIC specific data required by voltage driver.
114
* @slew_rate: PMIC slew rate (in uv/us)
115
* @step_size: PMIC voltage step size (in uv)
116
* @i2c_slave_addr: I2C slave address of PMIC
117
* @volt_reg_addr: voltage configuration register address
118
* @cmd_reg_addr: command (on, on-LP, ret, off) configuration register address
119
* @i2c_high_speed: whether VC uses I2C high-speed mode to PMIC
120
* @i2c_mcode: master code value for I2C high-speed preamble transmission
121
* @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
122
* @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
124
struct omap_voltdm_pmic {
143
unsigned long (*vsel_to_uv) (const u8 vsel);
144
u8 (*uv_to_vsel) (unsigned long uV);
147
void omap_voltage_get_volttable(struct voltagedomain *voltdm,
148
struct omap_volt_data **volt_data);
149
struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
151
int omap_voltage_register_pmic(struct voltagedomain *voltdm,
152
struct omap_voltdm_pmic *pmic);
153
void omap_change_voltscale_method(struct voltagedomain *voltdm,
154
int voltscale_method);
155
int omap_voltage_late_init(void);
157
extern void omap2xxx_voltagedomains_init(void);
158
extern void omap3xxx_voltagedomains_init(void);
159
extern void omap44xx_voltagedomains_init(void);
161
struct voltagedomain *voltdm_lookup(const char *name);
162
void voltdm_init(struct voltagedomain **voltdm_list);
163
int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm);
164
int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user),
166
int voltdm_for_each_pwrdm(struct voltagedomain *voltdm,
167
int (*fn)(struct voltagedomain *voltdm,
168
struct powerdomain *pwrdm));
169
int voltdm_scale(struct voltagedomain *voltdm, unsigned long target_volt);
170
void voltdm_reset(struct voltagedomain *voltdm);
171
unsigned long voltdm_get_voltage(struct voltagedomain *voltdm);