1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause 2 /* 3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <errno.h> 9 #include <i2c.h> 10 #include <power/pmic.h> 11 #include <power/stpmu1.h> 12 13 #define STMPU1_NUM_OF_REGS 0x100 14 15 #ifndef CONFIG_SPL_BUILD 16 static const struct pmic_child_info stpmu1_children_info[] = { 17 { .prefix = "ldo", .driver = "stpmu1_ldo" }, 18 { .prefix = "buck", .driver = "stpmu1_buck" }, 19 { .prefix = "vref_ddr", .driver = "stpmu1_vref_ddr" }, 20 { .prefix = "pwr_sw", .driver = "stpmu1_pwr_sw" }, 21 { .prefix = "boost", .driver = "stpmu1_boost" }, 22 { }, 23 }; 24 #endif /* CONFIG_SPL_BUILD */ 25 26 static int stpmu1_reg_count(struct udevice *dev) 27 { 28 return STMPU1_NUM_OF_REGS; 29 } 30 31 static int stpmu1_write(struct udevice *dev, uint reg, const uint8_t *buff, 32 int len) 33 { 34 int ret; 35 36 ret = dm_i2c_write(dev, reg, buff, len); 37 if (ret) 38 dev_err(dev, "%s: failed to write register %#x :%d", 39 __func__, reg, ret); 40 41 return ret; 42 } 43 44 static int stpmu1_read(struct udevice *dev, uint reg, uint8_t *buff, int len) 45 { 46 int ret; 47 48 ret = dm_i2c_read(dev, reg, buff, len); 49 if (ret) 50 dev_err(dev, "%s: failed to read register %#x : %d", 51 __func__, reg, ret); 52 53 return ret; 54 } 55 56 static int stpmu1_bind(struct udevice *dev) 57 { 58 #ifndef CONFIG_SPL_BUILD 59 ofnode regulators_node; 60 int children; 61 62 regulators_node = dev_read_subnode(dev, "regulators"); 63 if (!ofnode_valid(regulators_node)) { 64 dev_dbg(dev, "regulators subnode not found!"); 65 return -ENXIO; 66 } 67 dev_dbg(dev, "found regulators subnode\n"); 68 69 children = pmic_bind_children(dev, regulators_node, 70 stpmu1_children_info); 71 if (!children) 72 dev_dbg(dev, "no child found\n"); 73 #endif /* CONFIG_SPL_BUILD */ 74 75 return 0; 76 } 77 78 static struct dm_pmic_ops stpmu1_ops = { 79 .reg_count = stpmu1_reg_count, 80 .read = stpmu1_read, 81 .write = stpmu1_write, 82 }; 83 84 static const struct udevice_id stpmu1_ids[] = { 85 { .compatible = "st,stpmu1" }, 86 { } 87 }; 88 89 U_BOOT_DRIVER(pmic_stpmu1) = { 90 .name = "stpmu1_pmic", 91 .id = UCLASS_PMIC, 92 .of_match = stpmu1_ids, 93 .bind = stpmu1_bind, 94 .ops = &stpmu1_ops, 95 }; 96