Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 NVIDIA Corporation |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0+ |
| 5 | */ |
| 6 | |
| 7 | #define pr_fmt(fmt) "as3722: " fmt |
| 8 | |
| 9 | #include <common.h> |
| 10 | #include <dm.h> |
| 11 | #include <errno.h> |
| 12 | #include <fdtdec.h> |
| 13 | #include <i2c.h> |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 14 | #include <dm/lists.h> |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 15 | #include <power/as3722.h> |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 16 | #include <power/pmic.h> |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 17 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 18 | #define AS3722_NUM_OF_REGS 0x92 |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 19 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 20 | static int as3722_read(struct udevice *dev, uint reg, uint8_t *buff, int len) |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 21 | { |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 22 | int ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 23 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 24 | ret = dm_i2c_read(dev, reg, buff, len); |
| 25 | if (ret < 0) |
| 26 | return ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 27 | |
| 28 | return 0; |
| 29 | } |
| 30 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 31 | static int as3722_write(struct udevice *dev, uint reg, const uint8_t *buff, |
| 32 | int len) |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 33 | { |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 34 | int ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 35 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 36 | ret = dm_i2c_write(dev, reg, buff, len); |
| 37 | if (ret < 0) |
| 38 | return ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 39 | |
| 40 | return 0; |
| 41 | } |
| 42 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 43 | static int as3722_read_id(struct udevice *dev, uint *idp, uint *revisionp) |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 44 | { |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 45 | int ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 46 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 47 | ret = pmic_reg_read(dev, AS3722_ASIC_ID1); |
| 48 | if (ret < 0) { |
| 49 | error("failed to read ID1 register: %d", ret); |
| 50 | return ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 51 | } |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 52 | *idp = ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 53 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 54 | ret = pmic_reg_read(dev, AS3722_ASIC_ID2); |
| 55 | if (ret < 0) { |
| 56 | error("failed to read ID2 register: %d", ret); |
| 57 | return ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 58 | } |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 59 | *revisionp = ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 60 | |
| 61 | return 0; |
| 62 | } |
| 63 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 64 | /* TODO(treding@nvidia.com): Add proper regulator support to avoid this */ |
| 65 | int as3722_sd_set_voltage(struct udevice *dev, unsigned int sd, u8 value) |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 66 | { |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 67 | int ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 68 | |
| 69 | if (sd > 6) |
| 70 | return -EINVAL; |
| 71 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 72 | ret = pmic_reg_write(dev, AS3722_SD_VOLTAGE(sd), value); |
| 73 | if (ret < 0) { |
| 74 | error("failed to write SD%u voltage register: %d", sd, ret); |
| 75 | return ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | return 0; |
| 79 | } |
| 80 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 81 | int as3722_ldo_set_voltage(struct udevice *dev, unsigned int ldo, u8 value) |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 82 | { |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 83 | int ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 84 | |
| 85 | if (ldo > 11) |
| 86 | return -EINVAL; |
| 87 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 88 | ret = pmic_reg_write(dev, AS3722_LDO_VOLTAGE(ldo), value); |
| 89 | if (ret < 0) { |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 90 | error("failed to write LDO%u voltage register: %d", ldo, |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 91 | ret); |
| 92 | return ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | return 0; |
| 96 | } |
| 97 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 98 | static int as3722_probe(struct udevice *dev) |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 99 | { |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 100 | uint id, revision; |
| 101 | int ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 102 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 103 | ret = as3722_read_id(dev, &id, &revision); |
| 104 | if (ret < 0) { |
| 105 | error("failed to read ID: %d", ret); |
| 106 | return ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 107 | } |
| 108 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 109 | if (id != AS3722_DEVICE_ID) { |
| 110 | error("unknown device"); |
| 111 | return -ENOENT; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 112 | } |
| 113 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 114 | debug("AS3722 revision %#x found on I2C bus %s\n", revision, dev->name); |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 115 | |
| 116 | return 0; |
| 117 | } |
| 118 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 119 | #if CONFIG_IS_ENABLED(PMIC_CHILDREN) |
| 120 | static const struct pmic_child_info pmic_children_info[] = { |
| 121 | { .prefix = "sd", .driver = "as3722_stepdown"}, |
| 122 | { .prefix = "ldo", .driver = "as3722_ldo"}, |
| 123 | { }, |
| 124 | }; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 125 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 126 | static int as3722_bind(struct udevice *dev) |
| 127 | { |
| 128 | struct udevice *gpio_dev; |
| 129 | ofnode regulators_node; |
| 130 | int children; |
| 131 | int ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 132 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 133 | regulators_node = dev_read_subnode(dev, "regulators"); |
| 134 | if (!ofnode_valid(regulators_node)) { |
| 135 | debug("%s: %s regulators subnode not found\n", __func__, |
| 136 | dev->name); |
| 137 | return -ENXIO; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 138 | } |
| 139 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 140 | children = pmic_bind_children(dev, regulators_node, pmic_children_info); |
| 141 | if (!children) |
| 142 | debug("%s: %s - no child found\n", __func__, dev->name); |
| 143 | ret = device_bind_driver(dev, "gpio_as3722", "gpio_as3722", &gpio_dev); |
| 144 | if (ret) { |
| 145 | debug("%s: Cannot bind GPIOs (ret=%d)\n", __func__, ret); |
| 146 | return ret; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | return 0; |
| 150 | } |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 151 | #endif |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 152 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 153 | static int as3722_reg_count(struct udevice *dev) |
Simon Glass | 053da13 | 2015-04-14 21:03:26 -0600 | [diff] [blame] | 154 | { |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 155 | return AS3722_NUM_OF_REGS; |
Simon Glass | 053da13 | 2015-04-14 21:03:26 -0600 | [diff] [blame] | 156 | } |
| 157 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 158 | static struct dm_pmic_ops as3722_ops = { |
| 159 | .reg_count = as3722_reg_count, |
| 160 | .read = as3722_read, |
| 161 | .write = as3722_write, |
| 162 | }; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 163 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 164 | static const struct udevice_id as3722_ids[] = { |
| 165 | { .compatible = "ams,as3722" }, |
| 166 | { } |
| 167 | }; |
Thierry Reding | 09c0cf2 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 168 | |
Simon Glass | b3d2ed3 | 2017-07-25 08:30:12 -0600 | [diff] [blame^] | 169 | U_BOOT_DRIVER(pmic_as3722) = { |
| 170 | .name = "as3722_pmic", |
| 171 | .id = UCLASS_PMIC, |
| 172 | .of_match = as3722_ids, |
| 173 | #if CONFIG_IS_ENABLED(PMIC_CHILDREN) |
| 174 | .bind = as3722_bind, |
| 175 | #endif |
| 176 | .probe = as3722_probe, |
| 177 | .ops = &as3722_ops, |
| 178 | }; |