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 DECLARE_GLOBAL_DATA_PTR; 19 20 static const struct pmic_child_info pmic_children_info[] = { 21 { .prefix = "ldo", .driver = LP873X_LDO_DRIVER }, 22 { .prefix = "buck", .driver = LP873X_BUCK_DRIVER }, 23 { }, 24 }; 25 26 static int lp873x_write(struct udevice *dev, uint reg, const uint8_t *buff, 27 int len) 28 { 29 if (dm_i2c_write(dev, reg, buff, len)) { 30 pr_err("write error to device: %p register: %#x!", dev, reg); 31 return -EIO; 32 } 33 34 return 0; 35 } 36 37 static int lp873x_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 38 { 39 if (dm_i2c_read(dev, reg, buff, len)) { 40 pr_err("read error from device: %p register: %#x!", dev, reg); 41 return -EIO; 42 } 43 44 return 0; 45 } 46 47 static int lp873x_bind(struct udevice *dev) 48 { 49 ofnode regulators_node; 50 int children; 51 52 regulators_node = dev_read_subnode(dev, "regulators"); 53 if (!ofnode_valid(regulators_node)) { 54 debug("%s: %s regulators subnode not found!", __func__, 55 dev->name); 56 return -ENXIO; 57 } 58 59 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 60 if (!children) 61 printf("%s: %s - no child found\n", __func__, dev->name); 62 63 /* Always return success for this device */ 64 return 0; 65 } 66 67 static struct dm_pmic_ops lp873x_ops = { 68 .read = lp873x_read, 69 .write = lp873x_write, 70 }; 71 72 static const struct udevice_id lp873x_ids[] = { 73 { .compatible = "ti,lp8732", .data = LP8732 }, 74 { .compatible = "ti,lp8733" , .data = LP8733 }, 75 { } 76 }; 77 78 U_BOOT_DRIVER(pmic_lp873x) = { 79 .name = "lp873x_pmic", 80 .id = UCLASS_PMIC, 81 .of_match = lp873x_ids, 82 .bind = lp873x_bind, 83 .ops = &lp873x_ops, 84 }; 85