1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) 2018 Theobroma Systems Design und Consulting GmbH 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <dm/device-internal.h> 9 #include <dm/lists.h> 10 #include <i2c.h> 11 #include <power/pmic.h> 12 #include <power/regulator.h> 13 14 static int pmic_fan53555_reg_count(struct udevice *dev) 15 { 16 return 1; 17 }; 18 19 static int pmic_fan53555_read(struct udevice *dev, uint reg, 20 u8 *buff, int len) 21 { 22 if (dm_i2c_read(dev, reg, buff, len)) { 23 pr_err("%s: read error for register: %#x!", dev->name, reg); 24 return -EIO; 25 } 26 27 return 0; 28 } 29 30 static int pmic_fan53555_write(struct udevice *dev, uint reg, 31 const u8 *buff, int len) 32 { 33 if (dm_i2c_write(dev, reg, buff, len)) { 34 pr_err("%s: write error for register: %#x!", dev->name, reg); 35 return -EIO; 36 } 37 38 return 0; 39 } 40 41 static int pmic_fan53555_bind(struct udevice *dev) 42 { 43 /* 44 * The FAN53555 has only a single regulator and therefore doesn't 45 * have a subnode. So we have to rebind a child device (the one 46 * regulator) here. 47 */ 48 49 const char *regulator_driver_name = "fan53555_regulator"; 50 struct udevice *child; 51 struct driver *drv; 52 53 debug("%s\n", __func__); 54 55 drv = lists_driver_lookup_name(regulator_driver_name); 56 if (!drv) { 57 dev_err(dev, "no driver '%s'\n", regulator_driver_name); 58 return -ENOENT; 59 } 60 61 return device_bind_with_driver_data(dev, drv, "SW", 0, 62 dev_ofnode(dev), &child); 63 }; 64 65 static struct dm_pmic_ops pmic_fan53555_ops = { 66 .reg_count = pmic_fan53555_reg_count, 67 .read = pmic_fan53555_read, 68 .write = pmic_fan53555_write, 69 }; 70 71 static const struct udevice_id pmic_fan53555_match[] = { 72 { .compatible = "fcs,fan53555" }, 73 { }, 74 }; 75 76 U_BOOT_DRIVER(pmic_fan53555) = { 77 .name = "pmic_fan53555", 78 .id = UCLASS_PMIC, 79 .of_match = pmic_fan53555_match, 80 .bind = pmic_fan53555_bind, 81 .ops = &pmic_fan53555_ops, 82 }; 83