arch/arm/mach-omap2/omap_twl.c

   1 /**
   2  * OMAP and TWL PMIC specific intializations.
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated.
   5  * Thara Gopinath
   6  * Copyright (C) 2009 Texas Instruments Incorporated.
   7  * Nishanth Menon
   8  * Copyright (C) 2009 Nokia Corporation
   9  * Paul Walmsley
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/err.h>
  17 #include <linux/io.h>
  18 #include <linux/kernel.h>
  19
  20 #include <plat/voltage.h>
  21
  22 #define OMAP3_SRI2C_SLAVE_ADDR          0x12
  23 #define OMAP3_VDD_MPU_SR_CONTROL_REG    0x00
  24 #define OMAP3_VDD_CORE_SR_CONTROL_REG   0x01
  25 #define OMAP3_VP_CONFIG_ERROROFFSET     0x00
  26 #define OMAP3_VP_VSTEPMIN_VSTEPMIN      0x1
  27 #define OMAP3_VP_VSTEPMAX_VSTEPMAX      0x04
  28 #define OMAP3_VP_VLIMITTO_TIMEOUT_US    200
  29
  30 #define OMAP3430_VP1_VLIMITTO_VDDMIN    0x14
  31 #define OMAP3430_VP1_VLIMITTO_VDDMAX    0x42
  32 #define OMAP3430_VP2_VLIMITTO_VDDMIN    0x18
  33 #define OMAP3430_VP2_VLIMITTO_VDDMAX    0x2c
  34
  35 #define OMAP3630_VP1_VLIMITTO_VDDMIN    0x18
  36 #define OMAP3630_VP1_VLIMITTO_VDDMAX    0x3c
  37 #define OMAP3630_VP2_VLIMITTO_VDDMIN    0x18
  38 #define OMAP3630_VP2_VLIMITTO_VDDMAX    0x30
  39
  40 unsigned long twl4030_vsel_to_uv(const u8 vsel)
  41 {
  42         return (((vsel * 125) + 6000)) * 100;
  43 }
  44
  45 u8 twl4030_uv_to_vsel(unsigned long uv)
  46 {
  47         return DIV_ROUND_UP(uv - 600000, 12500);
  48 }
  49
  50 static struct omap_volt_pmic_info omap3_mpu_volt_info = {
  51         .slew_rate              = 4000,
  52         .step_size              = 12500,
  53         .on_volt                = 1200000,
  54         .onlp_volt              = 1000000,
  55         .ret_volt               = 975000,
  56         .off_volt               = 600000,
  57         .volt_setup_time        = 0xfff,
  58         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
  59         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
  60         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
  61         .vp_vddmin              = OMAP3430_VP1_VLIMITTO_VDDMIN,
  62         .vp_vddmax              = OMAP3430_VP1_VLIMITTO_VDDMAX,
  63         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
  64         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
  65         .pmic_reg               = OMAP3_VDD_MPU_SR_CONTROL_REG,
  66         .vsel_to_uv             = twl4030_vsel_to_uv,
  67         .uv_to_vsel             = twl4030_uv_to_vsel,
  68 };
  69
  70 static struct omap_volt_pmic_info omap3_core_volt_info = {
  71         .slew_rate              = 4000,
  72         .step_size              = 12500,
  73         .on_volt                = 1200000,
  74         .onlp_volt              = 1000000,
  75         .ret_volt               = 975000,
  76         .off_volt               = 600000,
  77         .volt_setup_time        = 0xfff,
  78         .vp_erroroffset         = OMAP3_VP_CONFIG_ERROROFFSET,
  79         .vp_vstepmin            = OMAP3_VP_VSTEPMIN_VSTEPMIN,
  80         .vp_vstepmax            = OMAP3_VP_VSTEPMAX_VSTEPMAX,
  81         .vp_vddmin              = OMAP3430_VP2_VLIMITTO_VDDMIN,
  82         .vp_vddmax              = OMAP3430_VP2_VLIMITTO_VDDMAX,
  83         .vp_timeout_us          = OMAP3_VP_VLIMITTO_TIMEOUT_US,
  84         .i2c_slave_addr         = OMAP3_SRI2C_SLAVE_ADDR,
  85         .pmic_reg               = OMAP3_VDD_CORE_SR_CONTROL_REG,
  86         .vsel_to_uv             = twl4030_vsel_to_uv,
  87         .uv_to_vsel             = twl4030_uv_to_vsel,
  88 };
  89
  90 int __init omap3_twl_init(void)
  91 {
  92         struct voltagedomain *voltdm;
  93
  94         if (!cpu_is_omap34xx())
  95                 return -ENODEV;
  96
  97         if (cpu_is_omap3630()) {
  98                 omap3_mpu_volt_info.vp_vddmin = OMAP3630_VP1_VLIMITTO_VDDMIN;
  99                 omap3_mpu_volt_info.vp_vddmax = OMAP3630_VP1_VLIMITTO_VDDMAX;
 100                 omap3_core_volt_info.vp_vddmin = OMAP3630_VP2_VLIMITTO_VDDMIN;
 101                 omap3_core_volt_info.vp_vddmax = OMAP3630_VP2_VLIMITTO_VDDMAX;
 102         }
 103
 104         voltdm = omap_voltage_domain_lookup("mpu");
 105         omap_voltage_register_pmic(voltdm, &omap3_mpu_volt_info);
 106
 107         voltdm = omap_voltage_domain_lookup("core");
 108         omap_voltage_register_pmic(voltdm, &omap3_core_volt_info);
 109
 110         return 0;
 111 }