| vishnupatekar | 813c737 | 2015-11-29 01:07:21 +0800 | [diff] [blame] | 1 | /* |
| 2 | * AXP818 driver based on AXP221 driver |
| 3 | * |
| 4 | * |
| 5 | * (C) Copyright 2015 Vishnu Patekar <vishnuptekar0510@gmail.com> |
| 6 | * |
| 7 | * Based on axp221.c |
| 8 | * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com> |
| 9 | * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl> |
| 10 | * |
| 11 | * SPDX-License-Identifier: GPL-2.0+ |
| 12 | */ |
| 13 | |
| 14 | #include <common.h> |
| 15 | #include <errno.h> |
| 16 | #include <asm/arch/gpio.h> |
| 17 | #include <asm/arch/pmic_bus.h> |
| 18 | #include <axp_pmic.h> |
| 19 | |
| 20 | static u8 axp818_mvolt_to_cfg(int mvolt, int min, int max, int div) |
| 21 | { |
| 22 | if (mvolt < min) |
| 23 | mvolt = min; |
| 24 | else if (mvolt > max) |
| 25 | mvolt = max; |
| 26 | |
| 27 | return (mvolt - min) / div; |
| 28 | } |
| 29 | |
| 30 | int axp_set_dcdc1(unsigned int mvolt) |
| 31 | { |
| 32 | int ret; |
| 33 | u8 cfg = axp818_mvolt_to_cfg(mvolt, 1600, 3400, 100); |
| 34 | |
| 35 | if (mvolt == 0) |
| 36 | return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1, |
| 37 | AXP818_OUTPUT_CTRL1_DCDC1_EN); |
| 38 | |
| 39 | ret = pmic_bus_write(AXP818_DCDC1_CTRL, cfg); |
| 40 | if (ret) |
| 41 | return ret; |
| 42 | |
| 43 | return pmic_bus_setbits(AXP818_OUTPUT_CTRL1, |
| 44 | AXP818_OUTPUT_CTRL1_DCDC1_EN); |
| 45 | } |
| 46 | |
| 47 | int axp_set_dcdc2(unsigned int mvolt) |
| 48 | { |
| 49 | int ret; |
| 50 | u8 cfg; |
| 51 | |
| 52 | if (mvolt >= 1220) |
| 53 | cfg = 70 + axp818_mvolt_to_cfg(mvolt, 1220, 1300, 20); |
| 54 | else |
| 55 | cfg = axp818_mvolt_to_cfg(mvolt, 500, 1200, 10); |
| 56 | |
| 57 | if (mvolt == 0) |
| 58 | return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1, |
| 59 | AXP818_OUTPUT_CTRL1_DCDC2_EN); |
| 60 | |
| 61 | ret = pmic_bus_write(AXP818_DCDC2_CTRL, cfg); |
| 62 | if (ret) |
| 63 | return ret; |
| 64 | |
| 65 | return pmic_bus_setbits(AXP818_OUTPUT_CTRL1, |
| 66 | AXP818_OUTPUT_CTRL1_DCDC2_EN); |
| 67 | } |
| 68 | |
| 69 | int axp_set_dcdc3(unsigned int mvolt) |
| 70 | { |
| 71 | int ret; |
| 72 | u8 cfg; |
| 73 | |
| 74 | if (mvolt >= 1220) |
| 75 | cfg = 70 + axp818_mvolt_to_cfg(mvolt, 1220, 1300, 20); |
| 76 | else |
| 77 | cfg = axp818_mvolt_to_cfg(mvolt, 500, 1200, 10); |
| 78 | |
| 79 | if (mvolt == 0) |
| 80 | return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1, |
| 81 | AXP818_OUTPUT_CTRL1_DCDC3_EN); |
| 82 | |
| 83 | ret = pmic_bus_write(AXP818_DCDC3_CTRL, cfg); |
| 84 | if (ret) |
| 85 | return ret; |
| 86 | |
| 87 | return pmic_bus_setbits(AXP818_OUTPUT_CTRL1, |
| 88 | AXP818_OUTPUT_CTRL1_DCDC3_EN); |
| 89 | } |
| 90 | |
| 91 | int axp_set_dcdc5(unsigned int mvolt) |
| 92 | { |
| 93 | int ret; |
| 94 | u8 cfg; |
| 95 | |
| 96 | if (mvolt >= 1140) |
| 97 | cfg = 32 + axp818_mvolt_to_cfg(mvolt, 1140, 1840, 20); |
| 98 | else |
| 99 | cfg = axp818_mvolt_to_cfg(mvolt, 800, 1120, 10); |
| 100 | |
| 101 | if (mvolt == 0) |
| 102 | return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1, |
| 103 | AXP818_OUTPUT_CTRL1_DCDC5_EN); |
| 104 | |
| 105 | ret = pmic_bus_write(AXP818_DCDC5_CTRL, cfg); |
| 106 | if (ret) |
| 107 | return ret; |
| 108 | |
| 109 | return pmic_bus_setbits(AXP818_OUTPUT_CTRL1, |
| 110 | AXP818_OUTPUT_CTRL1_DCDC5_EN); |
| 111 | } |
| 112 | |
| 113 | int axp_init(void) |
| 114 | { |
| 115 | u8 axp_chip_id; |
| 116 | int ret; |
| 117 | |
| 118 | ret = pmic_bus_init(); |
| 119 | if (ret) |
| 120 | return ret; |
| 121 | |
| 122 | ret = pmic_bus_read(AXP818_CHIP_ID, &axp_chip_id); |
| 123 | if (ret) |
| 124 | return ret; |
| 125 | |
| 126 | if (!(axp_chip_id == 0x51)) |
| 127 | return -ENODEV; |
| 128 | else |
| 129 | return ret; |
| 130 | |
| 131 | return 0; |
| 132 | } |