1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) EETS GmbH, 2017, Felix Brack <f.brack@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