1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) EETS GmbH, 2017, Felix Brack <f.brack (at) eets.ch> 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <i2c.h> 9 #include <power/pmic.h> 10 #include <power/regulator.h> 11 #include <power/tps65910_pmic.h> 12 13 static const struct pmic_child_info pmic_children_info[] = { 14 { .prefix = "ldo_", .driver = TPS65910_LDO_DRIVER }, 15 { .prefix = "buck_", .driver = TPS65910_BUCK_DRIVER }, 16 { .prefix = "boost_", .driver = TPS65910_BOOST_DRIVER }, 17 { }, 18 }; 19 20 static int pmic_tps65910_reg_count(struct udevice *dev) 21 { 22 return TPS65910_NUM_REGS; 23 } 24 25 static int pmic_tps65910_write(struct udevice *dev, uint reg, const u8 *buffer, 26 int len) 27 { 28 int ret; 29 30 ret = dm_i2c_write(dev, reg, buffer, len); 31 if (ret) 32 pr_err("%s write error on register %02x\n", dev->name, reg); 33 34 return ret; 35 } 36 37 static int pmic_tps65910_read(struct udevice *dev, uint reg, u8 *buffer, 38 int len) 39 { 40 int ret; 41 42 ret = dm_i2c_read(dev, reg, buffer, len); 43 if (ret) 44 pr_err("%s read error on register %02x\n", dev->name, reg); 45 46 return ret; 47 } 48 49 static int pmic_tps65910_bind(struct udevice *dev) 50 { 51 ofnode regulators_node; 52 int children; 53 54 regulators_node = dev_read_subnode(dev, "regulators"); 55 if (!ofnode_valid(regulators_node)) { 56 debug("%s regulators subnode not found\n", dev->name); 57 return -EINVAL; 58 } 59 60 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 61 if (!children) 62 debug("%s has no children (regulators)\n", dev->name); 63 64 return 0; 65 } 66 67 static int pmic_tps65910_probe(struct udevice *dev) 68 { 69 /* use I2C control interface instead of I2C smartreflex interface to 70 * access smartrefelex registers VDD1_OP_REG, VDD1_SR_REG, VDD2_OP_REG 71 * and VDD2_SR_REG 72 */ 73 return pmic_clrsetbits(dev, TPS65910_REG_DEVICE_CTRL, 0, 74 TPS65910_I2C_SEL_MASK); 75 } 76 77 static struct dm_pmic_ops pmic_tps65910_ops = { 78 .reg_count = pmic_tps65910_reg_count, 79 .read = pmic_tps65910_read, 80 .write = pmic_tps65910_write, 81 }; 82 83 static const struct udevice_id pmic_tps65910_match[] = { 84 { .compatible = "ti,tps65910" }, 85 { /* sentinel */ } 86 }; 87 88 U_BOOT_DRIVER(pmic_tps65910) = { 89 .name = "pmic_tps65910", 90 .id = UCLASS_PMIC, 91 .of_match = pmic_tps65910_match, 92 .bind = pmic_tps65910_bind, 93 .probe = pmic_tps65910_probe, 94 .ops = &pmic_tps65910_ops, 95 }; 96
