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| Commit | Line | Data |
|---|---|---|
| d308c013 SG |
1 | /* |
| 2 | * Copyright (C) 2015 Google, Inc | |
| 3 | * | |
| 4 | * SPDX-License-Identifier: GPL-2.0+ | |
| 5 | */ | |
| 6 | ||
| 7 | #include <common.h> | |
| 8 | #include <fdtdec.h> | |
| 9 | #include <errno.h> | |
| 10 | #include <dm.h> | |
| 11 | #include <i2c.h> | |
| 12 | #include <power/pmic.h> | |
| 13 | #include <power/regulator.h> | |
| 14 | #include <power/s5m8767.h> | |
| 15 | ||
| 16 | DECLARE_GLOBAL_DATA_PTR; | |
| 17 | ||
| 18 | static const struct pmic_child_info pmic_children_info[] = { | |
| 19 | { .prefix = "LDO", .driver = S5M8767_LDO_DRIVER }, | |
| 20 | { .prefix = "BUCK", .driver = S5M8767_BUCK_DRIVER }, | |
| 21 | { }, | |
| 22 | }; | |
| 23 | ||
| 24 | static int s5m8767_reg_count(struct udevice *dev) | |
| 25 | { | |
| 26 | return S5M8767_NUM_OF_REGS; | |
| 27 | } | |
| 28 | ||
| 29 | static int s5m8767_write(struct udevice *dev, uint reg, const uint8_t *buff, | |
| 30 | int len) | |
| 31 | { | |
| 32 | if (dm_i2c_write(dev, reg, buff, len)) { | |
| 33 | error("write error to device: %p register: %#x!", dev, reg); | |
| 34 | return -EIO; | |
| 35 | } | |
| 36 | ||
| 37 | return 0; | |
| 38 | } | |
| 39 | ||
| 40 | static int s5m8767_read(struct udevice *dev, uint reg, uint8_t *buff, int len) | |
| 41 | { | |
| 42 | if (dm_i2c_read(dev, reg, buff, len)) { | |
| 43 | error("read error from device: %p register: %#x!", dev, reg); | |
| 44 | return -EIO; | |
| 45 | } | |
| 46 | ||
| 47 | return 0; | |
| 48 | } | |
| 49 | ||
| 50 | int s5m8767_enable_32khz_cp(struct udevice *dev) | |
| 51 | { | |
| 52 | return pmic_clrsetbits(dev, S5M8767_EN32KHZ_CP, 0, 1 << 1); | |
| 53 | } | |
| 54 | ||
| 55 | static int s5m8767_bind(struct udevice *dev) | |
| 56 | { | |
| 57 | int node; | |
| 58 | const void *blob = gd->fdt_blob; | |
| 59 | int children; | |
| 60 | ||
| e160f7d4 | 61 | node = fdt_subnode_offset(blob, dev_of_offset(dev), "regulators"); |
| d308c013 SG |
62 | if (node <= 0) { |
| 63 | debug("%s: %s regulators subnode not found!", __func__, | |
| 64 | dev->name); | |
| 65 | return -ENXIO; | |
| 66 | } | |
| 67 | ||
| 68 | debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); | |
| 69 | ||
| 70 | children = pmic_bind_children(dev, node, pmic_children_info); | |
| 71 | if (!children) | |
| 72 | debug("%s: %s - no child found\n", __func__, dev->name); | |
| 73 | ||
| 74 | /* Always return success for this device */ | |
| 75 | return 0; | |
| 76 | } | |
| 77 | ||
| 78 | static struct dm_pmic_ops s5m8767_ops = { | |
| 79 | .reg_count = s5m8767_reg_count, | |
| 80 | .read = s5m8767_read, | |
| 81 | .write = s5m8767_write, | |
| 82 | }; | |
| 83 | ||
| 84 | static const struct udevice_id s5m8767_ids[] = { | |
| 85 | { .compatible = "samsung,s5m8767-pmic" }, | |
| 86 | { } | |
| 87 | }; | |
| 88 | ||
| 89 | U_BOOT_DRIVER(pmic_s5m8767) = { | |
| 90 | .name = "s5m8767_pmic", | |
| 91 | .id = UCLASS_PMIC, | |
| 92 | .of_match = s5m8767_ids, | |
| 93 | .bind = s5m8767_bind, | |
| 94 | .ops = &s5m8767_ops, | |
| 95 | }; |