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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | // SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com> * Keerthy <j-keerthy@ti.com> */ #include <fdtdec.h> #include <errno.h> #include <dm.h> #include <dm/lists.h> #include <i2c.h> #include <log.h> #include <linux/printk.h> #include <power/pmic.h> #include <power/regulator.h> #include <power/palmas.h> static const struct pmic_child_info pmic_children_info[] = { { .prefix = "ldo", .driver = PALMAS_LDO_DRIVER }, { .prefix = "smps", .driver = PALMAS_SMPS_DRIVER }, { }, }; static int palmas_write(struct udevice *dev, uint reg, const uint8_t *buff, int len) { if (dm_i2c_write(dev, reg, buff, len)) { pr_err("write error to device: %p register: %#x!\n", dev, reg); return -EIO; } return 0; } static int palmas_read(struct udevice *dev, uint reg, uint8_t *buff, int len) { if (dm_i2c_read(dev, reg, buff, len)) { pr_err("read error from device: %p register: %#x!\n", dev, reg); return -EIO; } return 0; } static int palmas_bind(struct udevice *dev) { ofnode pmic_node = ofnode_null(), regulators_node; ofnode subnode, gpio_node; int children, ret; if (IS_ENABLED(CONFIG_SYSRESET_PALMAS)) { ret = device_bind_driver_to_node(dev, PALMAS_RST_DRIVER, "sysreset", dev_ofnode(dev), NULL); if (ret) { log_err("cannot bind SYSRESET (ret = %d)\n", ret); return ret; } } gpio_node = ofnode_find_subnode(dev_ofnode(dev), "gpio"); if (ofnode_valid(gpio_node)) { ret = device_bind_driver_to_node(dev, PALMAS_GPIO_DRIVER, "gpio", gpio_node, NULL); if (ret) log_err("cannot bind GPIOs (ret = %d)\n", ret); } dev_for_each_subnode(subnode, dev) { const char *name; char *temp; name = ofnode_get_name(subnode); temp = strstr(name, "pmic"); if (temp) { pmic_node = subnode; break; } } if (!ofnode_valid(pmic_node)) { debug("%s: %s pmic subnode not found!\n", __func__, dev->name); return -ENXIO; } regulators_node = ofnode_find_subnode(pmic_node, "regulators"); if (!ofnode_valid(regulators_node)) { debug("%s: %s reg subnode not found!\n", __func__, dev->name); return -ENXIO; } children = pmic_bind_children(dev, regulators_node, pmic_children_info); if (!children) debug("%s: %s - no child found\n", __func__, dev->name); /* Always return success for this device */ return 0; } static int palmas_probe(struct udevice *dev) { struct dm_i2c_chip *chip = dev_get_parent_plat(dev); struct palmas_priv *priv = dev_get_priv(dev); struct udevice *bus = dev_get_parent(dev); u32 chip2_addr = chip->chip_addr + 1; int ret; /* Palmas PMIC is multi chip and chips are located in a row */ ret = i2c_get_chip(bus, chip2_addr, 1, &priv->chip2); if (ret) { log_err("cannot get second PMIC I2C chip (err %d)\n", ret); return ret; } return 0; } static struct dm_pmic_ops palmas_ops = { .read = palmas_read, .write = palmas_write, }; static const struct udevice_id palmas_ids[] = { { .compatible = "ti,tps659038", .data = TPS659038 }, { .compatible = "ti,tps65913" , .data = TPS659038 }, { .compatible = "ti,tps65917" , .data = TPS65917 }, { } }; U_BOOT_DRIVER(pmic_palmas) = { .name = "palmas_pmic", .id = UCLASS_PMIC, .of_match = palmas_ids, .bind = palmas_bind, .probe = palmas_probe, .ops = &palmas_ops, .priv_auto = sizeof(struct palmas_priv), }; |