1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2015 Freescale Semiconductor, Inc 4 * Peng Fan <Peng.Fan@freescale.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/pfuze100_pmic.h> 15 #include <power/pfuze3000_pmic.h> 16 17 static const struct pmic_child_info pmic_children_info[] = { 18 /* sw[x], swbst */ 19 { .prefix = "s", .driver = PFUZE100_REGULATOR_DRIVER }, 20 /* vgen[x], vsnvs, vcc, v33, vcc_sd */ 21 { .prefix = "v", .driver = PFUZE100_REGULATOR_DRIVER }, 22 { }, 23 }; 24 25 static int pfuze100_reg_count(struct udevice *dev) 26 { 27 return dev->driver_data == PFUZE3000 ? PFUZE3000_NUM_OF_REGS : PFUZE100_NUM_OF_REGS; 28 } 29 30 static int pfuze100_write(struct udevice *dev, uint reg, const uint8_t *buff, 31 int len) 32 { 33 if (dm_i2c_write(dev, reg, buff, len)) { 34 pr_err("write error to device: %p register: %#x!", dev, reg); 35 return -EIO; 36 } 37 38 return 0; 39 } 40 41 static int pfuze100_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 42 { 43 if (dm_i2c_read(dev, reg, buff, len)) { 44 pr_err("read error from device: %p register: %#x!", dev, reg); 45 return -EIO; 46 } 47 48 return 0; 49 } 50 51 static int pfuze100_bind(struct udevice *dev) 52 { 53 ofnode regulators_node; 54 int children; 55 56 regulators_node = dev_read_subnode(dev, "regulators"); 57 if (!ofnode_valid(regulators_node)) { 58 debug("%s: %s regulators subnode not found!", __func__, 59 dev->name); 60 return -ENXIO; 61 } 62 63 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 64 65 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 66 if (!children) 67 debug("%s: %s - no child found\n", __func__, dev->name); 68 69 /* Always return success for this device */ 70 return 0; 71 } 72 73 static struct dm_pmic_ops pfuze100_ops = { 74 .reg_count = pfuze100_reg_count, 75 .read = pfuze100_read, 76 .write = pfuze100_write, 77 }; 78 79 static const struct udevice_id pfuze100_ids[] = { 80 { .compatible = "fsl,pfuze100", .data = PFUZE100, }, 81 { .compatible = "fsl,pfuze200", .data = PFUZE200, }, 82 { .compatible = "fsl,pfuze3000", .data = PFUZE3000, }, 83 { } 84 }; 85 86 U_BOOT_DRIVER(pmic_pfuze100) = { 87 .name = "pfuze100 pmic", 88 .id = UCLASS_PMIC, 89 .of_match = pfuze100_ids, 90 .bind = pfuze100_bind, 91 .ops = &pfuze100_ops, 92 }; 93