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/palmas.h> 16 #include <dm/device.h> 17 18 static const struct pmic_child_info pmic_children_info[] = { 19 { .prefix = "ldo", .driver = PALMAS_LDO_DRIVER }, 20 { .prefix = "smps", .driver = PALMAS_SMPS_DRIVER }, 21 { }, 22 }; 23 24 static int palmas_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 palmas_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 palmas_bind(struct udevice *dev) 46 { 47 ofnode pmic_node = ofnode_null(), regulators_node; 48 ofnode subnode; 49 int children; 50 51 dev_for_each_subnode(subnode, dev) { 52 const char *name; 53 char *temp; 54 55 name = ofnode_get_name(subnode); 56 temp = strstr(name, "pmic"); 57 if (temp) { 58 pmic_node = subnode; 59 break; 60 } 61 } 62 63 if (!ofnode_valid(pmic_node)) { 64 debug("%s: %s pmic subnode not found!", __func__, dev->name); 65 return -ENXIO; 66 } 67 68 regulators_node = ofnode_find_subnode(pmic_node, "regulators"); 69 70 if (!ofnode_valid(regulators_node)) { 71 debug("%s: %s reg subnode not found!", __func__, dev->name); 72 return -ENXIO; 73 } 74 75 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 76 if (!children) 77 debug("%s: %s - no child found\n", __func__, dev->name); 78 79 /* Always return success for this device */ 80 return 0; 81 } 82 83 static struct dm_pmic_ops palmas_ops = { 84 .read = palmas_read, 85 .write = palmas_write, 86 }; 87 88 static const struct udevice_id palmas_ids[] = { 89 { .compatible = "ti,tps659038", .data = TPS659038 }, 90 { .compatible = "ti,tps65917" , .data = TPS65917 }, 91 { } 92 }; 93 94 U_BOOT_DRIVER(pmic_palmas) = { 95 .name = "palmas_pmic", 96 .id = UCLASS_PMIC, 97 .of_match = palmas_ids, 98 .bind = palmas_bind, 99 .ops = &palmas_ops, 100 }; 101