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 DECLARE_GLOBAL_DATA_PTR; 19 20 static const struct pmic_child_info pmic_children_info[] = { 21 { .prefix = "buck", .driver = LP87565_BUCK_DRIVER }, 22 { }, 23 }; 24 25 static int lp87565_write(struct udevice *dev, uint reg, const uint8_t *buff, 26 int len) 27 { 28 int ret; 29 30 ret = dm_i2c_write(dev, reg, buff, len); 31 if (ret) 32 pr_err("write error to device: %p register: %#x!", dev, reg); 33 34 return ret; 35 } 36 37 static int lp87565_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 from device: %p register: %#x!", dev, reg); 44 45 return ret; 46 } 47 48 static int lp87565_bind(struct udevice *dev) 49 { 50 ofnode regulators_node; 51 int children; 52 53 regulators_node = dev_read_subnode(dev, "regulators"); 54 if (!ofnode_valid(regulators_node)) { 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 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 63 if (!children) 64 printf("%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 lp87565_ops = { 71 .read = lp87565_read, 72 .write = lp87565_write, 73 }; 74 75 static const struct udevice_id lp87565_ids[] = { 76 { .compatible = "ti,lp87565", .data = LP87565 }, 77 { .compatible = "ti,lp87565-q1", .data = LP87565_Q1 }, 78 { } 79 }; 80 81 U_BOOT_DRIVER(pmic_lp87565) = { 82 .name = "lp87565_pmic", 83 .id = UCLASS_PMIC, 84 .of_match = lp87565_ids, 85 .bind = lp87565_bind, 86 .ops = &lp87565_ops, 87 }; 88