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>
23 #define VOLTSCALE_VPFORCEUPDATE 1
24 #define VOLTSCALE_VCBYPASS 2
27 * OMAP3 GENERIC setup times. Revisit to see if these needs to be
28 * passed from board or PMIC file
30 #define OMAP3_CLKSETUP 0xff
31 #define OMAP3_VOLTOFFSET 0xff
32 #define OMAP3_VOLTSETUP2 0xff
37 * struct omap_vfsm_instance_data - 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
41 * @voltsetup_shift: SETUP_TIME* field shift in the PRM_VOLTSETUP* register
43 * XXX What about VOLTOFFSET/VOLTCTRL?
44 * XXX It is not necessary to have both a _mask and a _shift for the same
45 * bitfield - remove one!
47 struct omap_vfsm_instance_data {
54 * struct voltagedomain - omap voltage domain global structure.
55 * @name: Name of the voltage domain which can be used as a unique identifier.
56 * @scalable: Whether or not this voltage domain is scalable
57 * @node: list_head linking all voltage domains
60 struct voltagedomain {
63 struct list_head node;
64 struct omap_vdd_info *vdd;
68 * struct omap_volt_data - Omap voltage specific data.
69 * @voltage_nominal: The possible voltage value in uV
70 * @sr_efuse_offs: The offset of the efuse register(from system
71 * control module base address) from where to read
72 * the n-target value for the smartreflex module.
73 * @sr_errminlimit: Error min limit value for smartreflex. This value
74 * differs at differnet opp and thus is linked
76 * @vp_errorgain: Error gain value for the voltage processor. This
77 * field also differs according to the voltage/opp.
79 struct omap_volt_data {
87 * struct omap_volt_pmic_info - PMIC specific data required by voltage driver.
88 * @slew_rate: PMIC slew rate (in uv/us)
89 * @step_size: PMIC voltage step size (in uv)
90 * @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
91 * @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
93 struct omap_volt_pmic_info {
109 unsigned long (*vsel_to_uv) (const u8 vsel);
110 u8 (*uv_to_vsel) (unsigned long uV);
114 * omap_vdd_info - Per Voltage Domain info
116 * @volt_data : voltage table having the distinct voltages supported
117 * by the domain and other associated per voltage data.
118 * @pmic_info : pmic specific parameters which should be populted by
120 * @vp_data : the register values, shifts, masks for various
122 * @vp_rt_data : VP data derived at runtime, not predefined
123 * @vc_data : structure containing various various vc registers,
125 * @vfsm : voltage manager FSM data
126 * @debug_dir : debug directory for this voltage domain.
127 * @curr_volt : current voltage for this vdd.
128 * @prm_irqst_mod : PRM module id used for PRM IRQ status register access
129 * @vp_enabled : flag to keep track of whether vp is enabled or not
130 * @volt_scale : API to scale the voltage of the vdd.
132 struct omap_vdd_info {
133 struct omap_volt_data *volt_data;
134 struct omap_volt_pmic_info *pmic_info;
135 struct omap_vp_instance_data *vp_data;
136 struct omap_vp_runtime_data vp_rt_data;
137 struct omap_vc_instance_data *vc_data;
138 const struct omap_vfsm_instance_data *vfsm;
139 struct dentry *debug_dir;
145 u32 (*read_reg) (u16 mod, u8 offset);
146 void (*write_reg) (u32 val, u16 mod, u8 offset);
147 int (*volt_scale) (struct voltagedomain *voltdm,
148 unsigned long target_volt);
151 unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm);
152 void omap_vp_enable(struct voltagedomain *voltdm);
153 void omap_vp_disable(struct voltagedomain *voltdm);
154 int omap_voltage_scale_vdd(struct voltagedomain *voltdm,
155 unsigned long target_volt);
156 void omap_voltage_reset(struct voltagedomain *voltdm);
157 void omap_voltage_get_volttable(struct voltagedomain *voltdm,
158 struct omap_volt_data **volt_data);
159 struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
161 unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm);
162 struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm);
164 int omap_voltage_register_pmic(struct voltagedomain *voltdm,
165 struct omap_volt_pmic_info *pmic_info);
166 void omap_change_voltscale_method(struct voltagedomain *voltdm,
167 int voltscale_method);
168 int omap_voltage_late_init(void);
170 static inline int omap_voltage_register_pmic(struct voltagedomain *voltdm,
171 struct omap_volt_pmic_info *pmic_info)
175 static inline void omap_change_voltscale_method(struct voltagedomain *voltdm,
176 int voltscale_method) {}
177 static inline int omap_voltage_late_init(void)
183 extern void omap2xxx_voltagedomains_init(void);
184 extern void omap3xxx_voltagedomains_init(void);
185 extern void omap44xx_voltagedomains_init(void);
187 struct voltagedomain *voltdm_lookup(const char *name);
188 void voltdm_init(struct voltagedomain **voltdm_list);
189 int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm);