| Thara Gopinath | fbc319f | 2010-12-10 22:51:05 +0530 | [diff] [blame] | 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 | } |