1 /* 2 * (C) Copyright 2017 Texas Instruments Incorporated, <www.ti.com> 3 * Keerthy <j-keerthy@ti.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/lp87565.h> 16 #include <dm/device.h> 17 18 static const struct pmic_child_info pmic_children_info[] = { 19 { .prefix = "buck", .driver = LP87565_BUCK_DRIVER }, 20 { }, 21 }; 22 23 static int lp87565_write(struct udevice *dev, uint reg, const uint8_t *buff, 24 int len) 25 { 26 int ret; 27 28 ret = dm_i2c_write(dev, reg, buff, len); 29 if (ret) 30 pr_err("write error to device: %p register: %#x!", dev, reg); 31 32 return ret; 33 } 34 35 static int lp87565_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 36 { 37 int ret; 38 39 ret = dm_i2c_read(dev, reg, buff, len); 40 if (ret) 41 pr_err("read error from device: %p register: %#x!", dev, reg); 42 43 return ret; 44 } 45 46 static int lp87565_bind(struct udevice *dev) 47 { 48 ofnode regulators_node; 49 int children; 50 51 regulators_node = dev_read_subnode(dev, "regulators"); 52 if (!ofnode_valid(regulators_node)) { 53 debug("%s: %s regulators subnode not found!", __func__, 54 dev->name); 55 return -ENXIO; 56 } 57 58 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 59 60 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 61 if (!children) 62 printf("%s: %s - no child found\n", __func__, dev->name); 63 64 /* Always return success for this device */ 65 return 0; 66 } 67 68 static struct dm_pmic_ops lp87565_ops = { 69 .read = lp87565_read, 70 .write = lp87565_write, 71 }; 72 73 static const struct udevice_id lp87565_ids[] = { 74 { .compatible = "ti,lp87565", .data = LP87565 }, 75 { .compatible = "ti,lp87565-q1", .data = LP87565_Q1 }, 76 { } 77 }; 78 79 U_BOOT_DRIVER(pmic_lp87565) = { 80 .name = "lp87565_pmic", 81 .id = UCLASS_PMIC, 82 .of_match = lp87565_ids, 83 .bind = lp87565_bind, 84 .ops = &lp87565_ops, 85 }; 86