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/palmas.h> 15 #include <dm/device.h> 16 17 static const struct pmic_child_info pmic_children_info[] = { 18 { .prefix = "ldo", .driver = PALMAS_LDO_DRIVER }, 19 { .prefix = "smps", .driver = PALMAS_SMPS_DRIVER }, 20 { }, 21 }; 22 23 static int palmas_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 palmas_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 palmas_bind(struct udevice *dev) 45 { 46 ofnode pmic_node = ofnode_null(), regulators_node; 47 ofnode subnode; 48 int children; 49 50 dev_for_each_subnode(subnode, dev) { 51 const char *name; 52 char *temp; 53 54 name = ofnode_get_name(subnode); 55 temp = strstr(name, "pmic"); 56 if (temp) { 57 pmic_node = subnode; 58 break; 59 } 60 } 61 62 if (!ofnode_valid(pmic_node)) { 63 debug("%s: %s pmic subnode not found!", __func__, dev->name); 64 return -ENXIO; 65 } 66 67 regulators_node = ofnode_find_subnode(pmic_node, "regulators"); 68 69 if (!ofnode_valid(regulators_node)) { 70 debug("%s: %s reg subnode not found!", __func__, dev->name); 71 return -ENXIO; 72 } 73 74 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 75 if (!children) 76 debug("%s: %s - no child found\n", __func__, dev->name); 77 78 /* Always return success for this device */ 79 return 0; 80 } 81 82 static struct dm_pmic_ops palmas_ops = { 83 .read = palmas_read, 84 .write = palmas_write, 85 }; 86 87 static const struct udevice_id palmas_ids[] = { 88 { .compatible = "ti,tps659038", .data = TPS659038 }, 89 { .compatible = "ti,tps65917" , .data = TPS65917 }, 90 { } 91 }; 92 93 U_BOOT_DRIVER(pmic_palmas) = { 94 .name = "palmas_pmic", 95 .id = UCLASS_PMIC, 96 .of_match = palmas_ids, 97 .bind = palmas_bind, 98 .ops = &palmas_ops, 99 }; 100