1 /* 2 * Copyright (C) EETS GmbH, 2017, Felix Brack <f.brack@eets.ch> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <dm.h> 9 #include <i2c.h> 10 #include <power/pmic.h> 11 #include <power/regulator.h> 12 #include <power/tps65910_pmic.h> 13 14 static const struct pmic_child_info pmic_children_info[] = { 15 { .prefix = "ldo_", .driver = TPS65910_LDO_DRIVER }, 16 { .prefix = "buck_", .driver = TPS65910_BUCK_DRIVER }, 17 { .prefix = "boost_", .driver = TPS65910_BOOST_DRIVER }, 18 { }, 19 }; 20 21 static int pmic_tps65910_reg_count(struct udevice *dev) 22 { 23 return TPS65910_NUM_REGS; 24 } 25 26 static int pmic_tps65910_write(struct udevice *dev, uint reg, const u8 *buffer, 27 int len) 28 { 29 int ret; 30 31 ret = dm_i2c_write(dev, reg, buffer, len); 32 if (ret) 33 pr_err("%s write error on register %02x\n", dev->name, reg); 34 35 return ret; 36 } 37 38 static int pmic_tps65910_read(struct udevice *dev, uint reg, u8 *buffer, 39 int len) 40 { 41 int ret; 42 43 ret = dm_i2c_read(dev, reg, buffer, len); 44 if (ret) 45 pr_err("%s read error on register %02x\n", dev->name, reg); 46 47 return ret; 48 } 49 50 static int pmic_tps65910_bind(struct udevice *dev) 51 { 52 ofnode regulators_node; 53 int children; 54 55 regulators_node = dev_read_subnode(dev, "regulators"); 56 if (!ofnode_valid(regulators_node)) { 57 debug("%s regulators subnode not found\n", dev->name); 58 return -EINVAL; 59 } 60 61 children = pmic_bind_children(dev, regulators_node, pmic_children_info); 62 if (!children) 63 debug("%s has no children (regulators)\n", dev->name); 64 65 return 0; 66 } 67 68 static int pmic_tps65910_probe(struct udevice *dev) 69 { 70 /* use I2C control interface instead of I2C smartreflex interface to 71 * access smartrefelex registers VDD1_OP_REG, VDD1_SR_REG, VDD2_OP_REG 72 * and VDD2_SR_REG 73 */ 74 return pmic_clrsetbits(dev, TPS65910_REG_DEVICE_CTRL, 0, 75 TPS65910_I2C_SEL_MASK); 76 } 77 78 static struct dm_pmic_ops pmic_tps65910_ops = { 79 .reg_count = pmic_tps65910_reg_count, 80 .read = pmic_tps65910_read, 81 .write = pmic_tps65910_write, 82 }; 83 84 static const struct udevice_id pmic_tps65910_match[] = { 85 { .compatible = "ti,tps65910" }, 86 { /* sentinel */ } 87 }; 88 89 U_BOOT_DRIVER(pmic_tps65910) = { 90 .name = "pmic_tps65910", 91 .id = UCLASS_PMIC, 92 .of_match = pmic_tps65910_match, 93 .bind = pmic_tps65910_bind, 94 .probe = pmic_tps65910_probe, 95 .ops = &pmic_tps65910_ops, 96 }; 97