1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com> 4 * Keerthy <j-keerthy@ti.com> 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/lp873x.h> 15 #include <dm/device.h> 16 17 static const struct pmic_child_info pmic_children_info[] = { 18 { .prefix = "ldo", .driver = LP873X_LDO_DRIVER }, 19 { .prefix = "buck", .driver = LP873X_BUCK_DRIVER }, 20 { }, 21 }; 22 23 static int lp873x_write(struct udevice *dev, uint reg, const uint8_t *buff, 24 int len) 25 { 26 if (dm_i2c_write(dev, reg, buff, len)) { 27 pr_err("write error to device: %p register: %#x!", dev, reg); 28 return -EIO; 29 } 30 31 return 0; 32 } 33 34 static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 35 { 36 if (dm_i2c_read(dev, reg, buff, len)) { 37 pr_err("read error from device: %p register: %#x!", dev, reg); 38 return -EIO; 39 } 40 41 return 0; 42 } 43 44 static int lp873x_bind(struct udevice *dev) 45 { 46 ofnode regulators_node; 47 int children; 48 49 regulators_node = dev_read_subnode(dev, "regulators"); 50 if (!ofnode_valid(regulators_node)) { 51 debug("%s: %s regulators subnode not found!", __func__, 52 dev->name); 53 return -ENXIO; 54 } 55 56 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 57 if (!children) 58 printf("%s: %s - no child found\n", __func__, dev->name); 59 60 /* Always return success for this device */ 61 return 0; 62 } 63 64 static struct dm_pmic_ops lp873x_ops = { 65 .read = lp873x_read, 66 .write = lp873x_write, 67 }; 68 69 static const struct udevice_id lp873x_ids[] = { 70 { .compatible = "ti,lp8732", .data = LP8732 }, 71 { .compatible = "ti,lp8733" , .data = LP8733 }, 72 { } 73 }; 74 75 U_BOOT_DRIVER(pmic_lp873x) = { 76 .name = "lp873x_pmic", 77 .id = UCLASS_PMIC, 78 .of_match = lp873x_ids, 79 .bind = lp873x_bind, 80 .ops = &lp873x_ops, 81 }; 82