arch/arm/plat-omap/include/plat/voltage.h

   1 /*
   2  * OMAP Voltage Management Routines
   3  *
   4  * Author: Thara Gopinath       <thara@ti.com>
   5  *
   6  * Copyright (C) 2009 Texas Instruments, Inc.
   7  * Thara Gopinath <thara@ti.com>
   8  *
   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.
  12  */
  13
  14 #ifndef __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
  15 #define __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
  16
  17 #include <linux/err.h>
  18
  19 #define VOLTSCALE_VPFORCEUPDATE         1
  20 #define VOLTSCALE_VCBYPASS              2
  21
  22 /*
  23  * OMAP3 GENERIC setup times. Revisit to see if these needs to be
  24  * passed from board or PMIC file
  25  */
  26 #define OMAP3_CLKSETUP          0xff
  27 #define OMAP3_VOLTOFFSET        0xff
  28 #define OMAP3_VOLTSETUP2        0xff
  29
  30 /* Voltage value defines */
  31 #define OMAP3430_VDD_MPU_OPP1_UV                975000
  32 #define OMAP3430_VDD_MPU_OPP2_UV                1075000
  33 #define OMAP3430_VDD_MPU_OPP3_UV                1200000
  34 #define OMAP3430_VDD_MPU_OPP4_UV                1270000
  35 #define OMAP3430_VDD_MPU_OPP5_UV                1350000
  36
  37 #define OMAP3430_VDD_CORE_OPP1_UV               975000
  38 #define OMAP3430_VDD_CORE_OPP2_UV               1050000
  39 #define OMAP3430_VDD_CORE_OPP3_UV               1150000
  40
  41 #define OMAP3630_VDD_MPU_OPP50_UV               1012500
  42 #define OMAP3630_VDD_MPU_OPP100_UV              1200000
  43 #define OMAP3630_VDD_MPU_OPP120_UV              1325000
  44 #define OMAP3630_VDD_MPU_OPP1G_UV               1375000
  45
  46 #define OMAP3630_VDD_CORE_OPP50_UV              1000000
  47 #define OMAP3630_VDD_CORE_OPP100_UV             1200000
  48
  49 #define OMAP4430_VDD_MPU_OPP50_UV               930000
  50 #define OMAP4430_VDD_MPU_OPP100_UV              1100000
  51 #define OMAP4430_VDD_MPU_OPPTURBO_UV            1260000
  52 #define OMAP4430_VDD_MPU_OPPNITRO_UV            1350000
  53
  54 #define OMAP4430_VDD_IVA_OPP50_UV               930000
  55 #define OMAP4430_VDD_IVA_OPP100_UV              1100000
  56 #define OMAP4430_VDD_IVA_OPPTURBO_UV            1260000
  57
  58 #define OMAP4430_VDD_CORE_OPP50_UV              930000
  59 #define OMAP4430_VDD_CORE_OPP100_UV             1100000
  60
  61 /**
  62  * struct voltagedomain - omap voltage domain global structure.
  63  * @name:       Name of the voltage domain which can be used as a unique
  64  *              identifier.
  65  */
  66 struct voltagedomain {
  67         char *name;
  68 };
  69
  70 /**
  71  * struct omap_volt_data - Omap voltage specific data.
  72  * @voltage_nominal:    The possible voltage value in uV
  73  * @sr_efuse_offs:      The offset of the efuse register(from system
  74  *                      control module base address) from where to read
  75  *                      the n-target value for the smartreflex module.
  76  * @sr_errminlimit:     Error min limit value for smartreflex. This value
  77  *                      differs at differnet opp and thus is linked
  78  *                      with voltage.
  79  * @vp_errorgain:       Error gain value for the voltage processor. This
  80  *                      field also differs according to the voltage/opp.
  81  */
  82 struct omap_volt_data {
  83         u32     volt_nominal;
  84         u32     sr_efuse_offs;
  85         u8      sr_errminlimit;
  86         u8      vp_errgain;
  87 };
  88
  89 /**
  90  * struct omap_volt_pmic_info - PMIC specific data required by voltage driver.
  91  * @slew_rate:  PMIC slew rate (in uv/us)
  92  * @step_size:  PMIC voltage step size (in uv)
  93  * @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
  94  * @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
  95  */
  96 struct omap_volt_pmic_info {
  97         int slew_rate;
  98         int step_size;
  99         u32 on_volt;
 100         u32 onlp_volt;
 101         u32 ret_volt;
 102         u32 off_volt;
 103         u16 volt_setup_time;
 104         u8 vp_erroroffset;
 105         u8 vp_vstepmin;
 106         u8 vp_vstepmax;
 107         u8 vp_vddmin;
 108         u8 vp_vddmax;
 109         u8 vp_timeout_us;
 110         u8 i2c_slave_addr;
 111         u8 pmic_reg;
 112         unsigned long (*vsel_to_uv) (const u8 vsel);
 113         u8 (*uv_to_vsel) (unsigned long uV);
 114 };
 115
 116 unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm);
 117 void omap_vp_enable(struct voltagedomain *voltdm);
 118 void omap_vp_disable(struct voltagedomain *voltdm);
 119 int omap_voltage_scale_vdd(struct voltagedomain *voltdm,
 120                 unsigned long target_volt);
 121 void omap_voltage_reset(struct voltagedomain *voltdm);
 122 void omap_voltage_get_volttable(struct voltagedomain *voltdm,
 123                 struct omap_volt_data **volt_data);
 124 struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
 125                 unsigned long volt);
 126 unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm);
 127 struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm);
 128 #ifdef CONFIG_PM
 129 int omap_voltage_register_pmic(struct voltagedomain *voltdm,
 130                 struct omap_volt_pmic_info *pmic_info);
 131 void omap_change_voltscale_method(struct voltagedomain *voltdm,
 132                 int voltscale_method);
 133 /* API to get the voltagedomain pointer */
 134 struct voltagedomain *omap_voltage_domain_lookup(char *name);
 135
 136 int omap_voltage_late_init(void);
 137 #else
 138 static inline int omap_voltage_register_pmic(struct voltagedomain *voltdm,
 139                 struct omap_volt_pmic_info *pmic_info)
 140 {
 141         return -EINVAL;
 142 }
 143 static inline  void omap_change_voltscale_method(struct voltagedomain *voltdm,
 144                 int voltscale_method) {}
 145 static inline int omap_voltage_late_init(void)
 146 {
 147         return -EINVAL;
 148 }
 149 static inline struct voltagedomain *omap_voltage_domain_lookup(char *name)
 150 {
 151         return ERR_PTR(-EINVAL);
 152 }
 153 #endif
 154
 155 #endif