1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2015 Google, Inc 4 */ 5 6 #include <common.h> 7 #include <fdtdec.h> 8 #include <errno.h> 9 #include <dm.h> 10 #include <i2c.h> 11 #include <power/pmic.h> 12 #include <power/regulator.h> 13 #include <power/s5m8767.h> 14 15 static const struct pmic_child_info pmic_children_info[] = { 16 { .prefix = "LDO", .driver = S5M8767_LDO_DRIVER }, 17 { .prefix = "BUCK", .driver = S5M8767_BUCK_DRIVER }, 18 { }, 19 }; 20 21 static int s5m8767_reg_count(struct udevice *dev) 22 { 23 return S5M8767_NUM_OF_REGS; 24 } 25 26 static int s5m8767_write(struct udevice *dev, uint reg, const uint8_t *buff, 27 int len) 28 { 29 if (dm_i2c_write(dev, reg, buff, len)) { 30 pr_err("write error to device: %p register: %#x!\n", dev, reg); 31 return -EIO; 32 } 33 34 return 0; 35 } 36 37 static int s5m8767_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 38 { 39 if (dm_i2c_read(dev, reg, buff, len)) { 40 pr_err("read error from device: %p register: %#x!\n", dev, reg); 41 return -EIO; 42 } 43 44 return 0; 45 } 46 47 int s5m8767_enable_32khz_cp(struct udevice *dev) 48 { 49 return pmic_clrsetbits(dev, S5M8767_EN32KHZ_CP, 0, 1 << 1); 50 } 51 52 static int s5m8767_bind(struct udevice *dev) 53 { 54 int children; 55 ofnode node; 56 57 node = dev_read_subnode(dev, "regulators"); 58 if (!ofnode_valid(node)) { 59 debug("%s: %s regulators subnode not found!\n", __func__, 60 dev->name); 61 return -ENXIO; 62 } 63 64 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); 65 66 children = pmic_bind_children(dev, node, pmic_children_info); 67 if (!children) 68 debug("%s: %s - no child found\n", __func__, dev->name); 69 70 /* Always return success for this device */ 71 return 0; 72 } 73 74 static struct dm_pmic_ops s5m8767_ops = { 75 .reg_count = s5m8767_reg_count, 76 .read = s5m8767_read, 77 .write = s5m8767_write, 78 }; 79 80 static const struct udevice_id s5m8767_ids[] = { 81 { .compatible = "samsung,s5m8767-pmic" }, 82 { } 83 }; 84 85 U_BOOT_DRIVER(pmic_s5m8767) = { 86 .name = "s5m8767_pmic", 87 .id = UCLASS_PMIC, 88 .of_match = s5m8767_ids, 89 .bind = s5m8767_bind, 90 .ops = &s5m8767_ops, 91 }; 92