Przemyslaw Marczak | 52a3de5 | 2015-04-20 20:07:46 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2014-2015 Samsung Electronics |
| 3 | * Przemyslaw Marczak <p.marczak@samsung.com> |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 6 | */ |
| 7 | |
| 8 | #include <common.h> |
| 9 | #include <fdtdec.h> |
| 10 | #include <errno.h> |
| 11 | #include <dm.h> |
| 12 | #include <i2c.h> |
| 13 | #include <power/pmic.h> |
| 14 | #include <power/regulator.h> |
| 15 | #include <power/max77686_pmic.h> |
| 16 | |
| 17 | DECLARE_GLOBAL_DATA_PTR; |
| 18 | |
| 19 | static const struct pmic_child_info pmic_childs_info[] = { |
| 20 | { .prefix = "ldo", .driver = MAX77686_LDO_DRIVER }, |
| 21 | { .prefix = "buck", .driver = MAX77686_BUCK_DRIVER }, |
| 22 | { }, |
| 23 | }; |
| 24 | |
| 25 | static int max77686_write(struct udevice *dev, uint reg, const uint8_t *buff, |
| 26 | int len) |
| 27 | { |
| 28 | if (dm_i2c_write(dev, reg, buff, len)) { |
| 29 | error("write error to device: %p register: %#x!", dev, reg); |
| 30 | return -EIO; |
| 31 | } |
| 32 | |
| 33 | return 0; |
| 34 | } |
| 35 | |
| 36 | static int max77686_read(struct udevice *dev, uint reg, uint8_t *buff, int len) |
| 37 | { |
| 38 | if (dm_i2c_read(dev, reg, buff, len)) { |
| 39 | error("read error from device: %p register: %#x!", dev, reg); |
| 40 | return -EIO; |
| 41 | } |
| 42 | |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | static int max77686_bind(struct udevice *dev) |
| 47 | { |
| 48 | int regulators_node; |
| 49 | const void *blob = gd->fdt_blob; |
| 50 | int childs; |
| 51 | |
| 52 | regulators_node = fdt_subnode_offset(blob, dev->of_offset, |
| 53 | "voltage-regulators"); |
| 54 | if (regulators_node <= 0) { |
| 55 | debug("%s: %s regulators subnode not found!", __func__, |
| 56 | dev->name); |
| 57 | return -ENXIO; |
| 58 | } |
| 59 | |
| 60 | debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); |
| 61 | |
| 62 | childs = pmic_bind_childs(dev, regulators_node, pmic_childs_info); |
| 63 | if (!childs) |
| 64 | debug("%s: %s - no child found\n", __func__, dev->name); |
| 65 | |
| 66 | /* Always return success for this device */ |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | static struct dm_pmic_ops max77686_ops = { |
| 71 | .reg_count = MAX77686_NUM_OF_REGS, |
| 72 | .read = max77686_read, |
| 73 | .write = max77686_write, |
| 74 | }; |
| 75 | |
| 76 | static const struct udevice_id max77686_ids[] = { |
| 77 | { .compatible = "maxim,max77686" }, |
| 78 | { } |
| 79 | }; |
| 80 | |
| 81 | U_BOOT_DRIVER(pmic_max77686) = { |
| 82 | .name = "max77686 pmic", |
| 83 | .id = UCLASS_PMIC, |
| 84 | .of_match = max77686_ids, |
| 85 | .bind = max77686_bind, |
| 86 | .ops = &max77686_ops, |
| 87 | }; |