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 error("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 error("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 int regulators_node; 50 const void *blob = gd->fdt_blob; 51 int children; 52 int node = dev_of_offset(dev); 53 54 regulators_node = fdt_subnode_offset(blob, node, "regulators"); 55 56 if (regulators_node <= 0) { 57 printf("%s: %s reg subnode not found!", __func__, dev->name); 58 return -ENXIO; 59 } 60 61 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 62 if (!children) 63 printf("%s: %s - no child found\n", __func__, dev->name); 64 65 /* Always return success for this device */ 66 return 0; 67 } 68 69 static struct dm_pmic_ops lp873x_ops = { 70 .read = lp873x_read, 71 .write = lp873x_write, 72 }; 73 74 static const struct udevice_id lp873x_ids[] = { 75 { .compatible = "ti,lp8732", .data = LP8732 }, 76 { .compatible = "ti,lp8733" , .data = LP8733 }, 77 { } 78 }; 79 80 U_BOOT_DRIVER(pmic_lp873x) = { 81 .name = "lp873x_pmic", 82 .id = UCLASS_PMIC, 83 .of_match = lp873x_ids, 84 .bind = lp873x_bind, 85 .ops = &lp873x_ops, 86 }; 87