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>
19 #include <linux/platform_data/voltage-omap.h>
27 #define VOLTSCALE_VPFORCEUPDATE 1
28 #define VOLTSCALE_VCBYPASS 2
31 * OMAP3 GENERIC setup times. Revisit to see if these needs to be
32 * passed from board or PMIC file
34 #define OMAP3_CLKSETUP 0xff
35 #define OMAP3_VOLTOFFSET 0xff
36 #define OMAP3_VOLTSETUP2 0xff
39 * struct omap_vfsm_instance - per-voltage manager FSM register/bitfield
41 * @voltsetup_mask: SETUP_TIME* bitmask in the PRM_VOLTSETUP* register
42 * @voltsetup_reg: register offset of PRM_VOLTSETUP from PRM base
44 * XXX What about VOLTOFFSET/VOLTCTRL?
46 struct omap_vfsm_instance {
52 * struct voltagedomain - omap voltage domain global structure.
53 * @name: Name of the voltage domain which can be used as a unique identifier.
54 * @scalable: Whether or not this voltage domain is scalable
55 * @node: list_head linking all voltage domains
56 * @pwrdm_list: list_head linking all powerdomains in this voltagedomain
57 * @vc: pointer to VC channel associated with this voltagedomain
58 * @vp: pointer to VP associated with this voltagedomain
59 * @read: read a VC/VP register
60 * @write: write a VC/VP register
61 * @read: read-modify-write a VC/VP register
62 * @sys_clk: system clock name/frequency, used for various timing calculations
63 * @scale: function used to scale the voltage of the voltagedomain
64 * @nominal_volt: current nominal voltage for this voltage domain
65 * @volt_data: voltage table having the distinct voltages supported
66 * by the domain and other associated per voltage data.
68 struct voltagedomain {
71 struct list_head node;
72 struct list_head pwrdm_list;
73 struct omap_vc_channel *vc;
74 const struct omap_vfsm_instance *vfsm;
75 struct omap_vp_instance *vp;
76 struct omap_voltdm_pmic *pmic;
78 /* VC/VP register access functions: SoC specific */
79 u32 (*read) (u8 offset);
80 void (*write) (u32 val, u8 offset);
81 u32 (*rmw)(u32 mask, u32 bits, u8 offset);
88 int (*scale) (struct voltagedomain *voltdm,
89 unsigned long target_volt);
92 struct omap_volt_data *volt_data;
95 /* Min and max voltages from OMAP perspective */
96 #define OMAP3430_VP1_VLIMITTO_VDDMIN 850000
97 #define OMAP3430_VP1_VLIMITTO_VDDMAX 1425000
98 #define OMAP3430_VP2_VLIMITTO_VDDMIN 900000
99 #define OMAP3430_VP2_VLIMITTO_VDDMAX 1150000
101 #define OMAP3630_VP1_VLIMITTO_VDDMIN 900000
102 #define OMAP3630_VP1_VLIMITTO_VDDMAX 1350000
103 #define OMAP3630_VP2_VLIMITTO_VDDMIN 900000
104 #define OMAP3630_VP2_VLIMITTO_VDDMAX 1200000
106 #define OMAP4_VP_MPU_VLIMITTO_VDDMIN 830000
107 #define OMAP4_VP_MPU_VLIMITTO_VDDMAX 1410000
108 #define OMAP4_VP_IVA_VLIMITTO_VDDMIN 830000
109 #define OMAP4_VP_IVA_VLIMITTO_VDDMAX 1260000
110 #define OMAP4_VP_CORE_VLIMITTO_VDDMIN 830000
111 #define OMAP4_VP_CORE_VLIMITTO_VDDMAX 1200000
114 * struct omap_voltdm_pmic - PMIC specific data required by voltage driver.
115 * @slew_rate: PMIC slew rate (in uv/us)
116 * @step_size: PMIC voltage step size (in uv)
117 * @i2c_slave_addr: I2C slave address of PMIC
118 * @volt_reg_addr: voltage configuration register address
119 * @cmd_reg_addr: command (on, on-LP, ret, off) configuration register address
120 * @i2c_high_speed: whether VC uses I2C high-speed mode to PMIC
121 * @i2c_mcode: master code value for I2C high-speed preamble transmission
122 * @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
123 * @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
125 struct omap_voltdm_pmic {
144 unsigned long (*vsel_to_uv) (const u8 vsel);
145 u8 (*uv_to_vsel) (unsigned long uV);
148 void omap_voltage_get_volttable(struct voltagedomain *voltdm,
149 struct omap_volt_data **volt_data);
150 struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
152 int omap_voltage_register_pmic(struct voltagedomain *voltdm,
153 struct omap_voltdm_pmic *pmic);
154 void omap_change_voltscale_method(struct voltagedomain *voltdm,
155 int voltscale_method);
156 int omap_voltage_late_init(void);
158 extern void omap2xxx_voltagedomains_init(void);
159 extern void omap3xxx_voltagedomains_init(void);
160 extern void am33xx_voltagedomains_init(void);
161 extern void omap44xx_voltagedomains_init(void);
163 struct voltagedomain *voltdm_lookup(const char *name);
164 void voltdm_init(struct voltagedomain **voltdm_list);
165 int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm);
166 int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user),
168 int voltdm_for_each_pwrdm(struct voltagedomain *voltdm,
169 int (*fn)(struct voltagedomain *voltdm,
170 struct powerdomain *pwrdm));
171 int voltdm_scale(struct voltagedomain *voltdm, unsigned long target_volt);
172 void voltdm_reset(struct voltagedomain *voltdm);
173 unsigned long voltdm_get_voltage(struct voltagedomain *voltdm);