1 /* 2 * Copyright (c) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <dm.h> 10 #include <errno.h> 11 #include <fdtdec.h> 12 #include <i2c.h> 13 #include <power/pmic.h> 14 #include <power/tps65090.h> 15 16 static const struct pmic_child_info pmic_children_info[] = { 17 { .prefix = "fet", .driver = TPS65090_FET_DRIVER }, 18 { }, 19 }; 20 21 static int tps65090_reg_count(struct udevice *dev) 22 { 23 return TPS65090_NUM_REGS; 24 } 25 26 static int tps65090_write(struct udevice *dev, uint reg, const uint8_t *buff, 27 int len) 28 { 29 if (dm_i2c_write(dev, reg, buff, len)) { 30 pr_err("write error to device: %p register: %#x!", dev, reg); 31 return -EIO; 32 } 33 34 return 0; 35 } 36 37 static int tps65090_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 38 { 39 int ret; 40 41 ret = dm_i2c_read(dev, reg, buff, len); 42 if (ret) { 43 pr_err("read error %d from device: %p register: %#x!", ret, dev, 44 reg); 45 return -EIO; 46 } 47 48 return 0; 49 } 50 51 static int tps65090_bind(struct udevice *dev) 52 { 53 ofnode regulators_node; 54 int children; 55 56 regulators_node = dev_read_subnode(dev, "regulators"); 57 if (!ofnode_valid(regulators_node)) { 58 debug("%s: %s regulators subnode not found!", __func__, 59 dev->name); 60 return -ENXIO; 61 } 62 63 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 64 65 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 66 if (!children) 67 debug("%s: %s - no child found\n", __func__, dev->name); 68 69 /* Always return success for this device */ 70 return 0; 71 } 72 73 static struct dm_pmic_ops tps65090_ops = { 74 .reg_count = tps65090_reg_count, 75 .read = tps65090_read, 76 .write = tps65090_write, 77 }; 78 79 static const struct udevice_id tps65090_ids[] = { 80 { .compatible = "ti,tps65090" }, 81 { } 82 }; 83 84 U_BOOT_DRIVER(pmic_tps65090) = { 85 .name = "tps65090 pmic", 86 .id = UCLASS_PMIC, 87 .of_match = tps65090_ids, 88 .bind = tps65090_bind, 89 .ops = &tps65090_ops, 90 }; 91