1 /* 2 * (C) Copyright 2016 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/lp873x.h> 16 #include <dm/device.h> 17 18 static const struct pmic_child_info pmic_children_info[] = { 19 { .prefix = "ldo", .driver = LP873X_LDO_DRIVER }, 20 { .prefix = "buck", .driver = LP873X_BUCK_DRIVER }, 21 { }, 22 }; 23 24 static int lp873x_write(struct udevice *dev, uint reg, const uint8_t *buff, 25 int len) 26 { 27 if (dm_i2c_write(dev, reg, buff, len)) { 28 pr_err("write error to device: %p register: %#x!", dev, reg); 29 return -EIO; 30 } 31 32 return 0; 33 } 34 35 static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 36 { 37 if (dm_i2c_read(dev, reg, buff, len)) { 38 pr_err("read error from device: %p register: %#x!", dev, reg); 39 return -EIO; 40 } 41 42 return 0; 43 } 44 45 static int lp873x_bind(struct udevice *dev) 46 { 47 ofnode regulators_node; 48 int children; 49 50 regulators_node = dev_read_subnode(dev, "regulators"); 51 if (!ofnode_valid(regulators_node)) { 52 debug("%s: %s regulators subnode not found!", __func__, 53 dev->name); 54 return -ENXIO; 55 } 56 57 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 58 if (!children) 59 printf("%s: %s - no child found\n", __func__, dev->name); 60 61 /* Always return success for this device */ 62 return 0; 63 } 64 65 static struct dm_pmic_ops lp873x_ops = { 66 .read = lp873x_read, 67 .write = lp873x_write, 68 }; 69 70 static const struct udevice_id lp873x_ids[] = { 71 { .compatible = "ti,lp8732", .data = LP8732 }, 72 { .compatible = "ti,lp8733" , .data = LP8733 }, 73 { } 74 }; 75 76 U_BOOT_DRIVER(pmic_lp873x) = { 77 .name = "lp873x_pmic", 78 .id = UCLASS_PMIC, 79 .of_match = lp873x_ids, 80 .bind = lp873x_bind, 81 .ops = &lp873x_ops, 82 }; 83