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