1 /* 2 * Copyright (C) 2015 Freescale Semiconductor, Inc 3 * Peng Fan <Peng.Fan@freescale.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/pfuze100_pmic.h> 16 17 DECLARE_GLOBAL_DATA_PTR; 18 19 static const struct pmic_child_info pmic_children_info[] = { 20 /* sw[x], swbst */ 21 { .prefix = "s", .driver = PFUZE100_REGULATOR_DRIVER }, 22 /* vgen[x], vsnvs, vcc, v33, vcc_sd */ 23 { .prefix = "v", .driver = PFUZE100_REGULATOR_DRIVER }, 24 { }, 25 }; 26 27 static int pfuze100_reg_count(struct udevice *dev) 28 { 29 return PFUZE100_NUM_OF_REGS; 30 } 31 32 static int pfuze100_write(struct udevice *dev, uint reg, const uint8_t *buff, 33 int len) 34 { 35 if (dm_i2c_write(dev, reg, buff, len)) { 36 pr_err("write error to device: %p register: %#x!", dev, reg); 37 return -EIO; 38 } 39 40 return 0; 41 } 42 43 static int pfuze100_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 44 { 45 if (dm_i2c_read(dev, reg, buff, len)) { 46 pr_err("read error from device: %p register: %#x!", dev, reg); 47 return -EIO; 48 } 49 50 return 0; 51 } 52 53 static int pfuze100_bind(struct udevice *dev) 54 { 55 ofnode regulators_node; 56 int children; 57 58 regulators_node = dev_read_subnode(dev, "regulators"); 59 if (!ofnode_valid(regulators_node)) { 60 debug("%s: %s regulators subnode not found!", __func__, 61 dev->name); 62 return -ENXIO; 63 } 64 65 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 66 67 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 68 if (!children) 69 debug("%s: %s - no child found\n", __func__, dev->name); 70 71 /* Always return success for this device */ 72 return 0; 73 } 74 75 static struct dm_pmic_ops pfuze100_ops = { 76 .reg_count = pfuze100_reg_count, 77 .read = pfuze100_read, 78 .write = pfuze100_write, 79 }; 80 81 static const struct udevice_id pfuze100_ids[] = { 82 { .compatible = "fsl,pfuze100", .data = PFUZE100, }, 83 { .compatible = "fsl,pfuze200", .data = PFUZE200, }, 84 { .compatible = "fsl,pfuze3000", .data = PFUZE3000, }, 85 { } 86 }; 87 88 U_BOOT_DRIVER(pmic_pfuze100) = { 89 .name = "pfuze100 pmic", 90 .id = UCLASS_PMIC, 91 .of_match = pfuze100_ids, 92 .bind = pfuze100_bind, 93 .ops = &pfuze100_ops, 94 }; 95