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 DECLARE_GLOBAL_DATA_PTR;
15 
16 static const struct pmic_child_info pmic_children_info[] = {
17 	{ .prefix = "ldo_", .driver = TPS65910_LDO_DRIVER },
18 	{ .prefix = "buck_", .driver = TPS65910_BUCK_DRIVER },
19 	{ .prefix = "boost_", .driver = TPS65910_BOOST_DRIVER },
20 	{ },
21 };
22 
23 static int pmic_tps65910_reg_count(struct udevice *dev)
24 {
25 	return TPS65910_NUM_REGS;
26 }
27 
28 static int pmic_tps65910_write(struct udevice *dev, uint reg, const u8 *buffer,
29 			       int len)
30 {
31 	int ret;
32 
33 	ret = dm_i2c_write(dev, reg, buffer, len);
34 	if (ret)
35 		pr_err("%s write error on register %02x\n", dev->name, reg);
36 
37 	return ret;
38 }
39 
40 static int pmic_tps65910_read(struct udevice *dev, uint reg, u8 *buffer,
41 			      int len)
42 {
43 	int ret;
44 
45 	ret = dm_i2c_read(dev, reg, buffer, len);
46 	if (ret)
47 		pr_err("%s read error on register %02x\n", dev->name, reg);
48 
49 	return ret;
50 }
51 
52 static int pmic_tps65910_bind(struct udevice *dev)
53 {
54 	ofnode regulators_node;
55 	int children;
56 
57 	regulators_node = dev_read_subnode(dev, "regulators");
58 	if (!ofnode_valid(regulators_node)) {
59 		debug("%s regulators subnode not found\n", dev->name);
60 		return -EINVAL;
61 	}
62 
63 	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
64 	if (!children)
65 		debug("%s has no children (regulators)\n", dev->name);
66 
67 	return 0;
68 }
69 
70 static int pmic_tps65910_probe(struct udevice *dev)
71 {
72 	/* use I2C control interface instead of I2C smartreflex interface to
73 	 * access smartrefelex registers VDD1_OP_REG, VDD1_SR_REG, VDD2_OP_REG
74 	 * and VDD2_SR_REG
75 	 */
76 	return pmic_clrsetbits(dev, TPS65910_REG_DEVICE_CTRL, 0,
77 			       TPS65910_I2C_SEL_MASK);
78 }
79 
80 static struct dm_pmic_ops pmic_tps65910_ops = {
81 	.reg_count = pmic_tps65910_reg_count,
82 	.read = pmic_tps65910_read,
83 	.write = pmic_tps65910_write,
84 };
85 
86 static const struct udevice_id pmic_tps65910_match[] = {
87 	{ .compatible = "ti,tps65910" },
88 	{ /* sentinel */ }
89 };
90 
91 U_BOOT_DRIVER(pmic_tps65910) = {
92 	.name = "pmic_tps65910",
93 	.id = UCLASS_PMIC,
94 	.of_match = pmic_tps65910_match,
95 	.bind = pmic_tps65910_bind,
96 	.probe = pmic_tps65910_probe,
97 	.ops = &pmic_tps65910_ops,
98 };
99