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