1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com/
4 *      Tero Kristo <t-kristo@ti.com>
5 */
6
7#include <common.h>
8#include <dm.h>
9#include <i2c.h>
10#include <dm/device_compat.h>
11#include <power/regulator.h>
12
13#define TPS62360_REG_SET0	0
14
15#define TPS62360_I2C_CHIP	0x60
16
17#define TPS62360_VSEL_STEPSIZE	10000 /* In uV */
18
19struct tps62360_regulator_config {
20	u32 vmin;
21	u32 vmax;
22};
23
24struct tps62360_regulator_pdata {
25	u8 vsel_offset;
26	struct udevice *i2c;
27	struct tps62360_regulator_config *config;
28};
29
30/*
31 * TPS62362/TPS62363 are just re-using these values for now, their preset
32 * voltage values are just different compared to TPS62360/TPS62361.
33 */
34static struct tps62360_regulator_config tps62360_data = {
35	.vmin = 770000,
36	.vmax = 1400000,
37};
38
39static struct tps62360_regulator_config tps62361_data = {
40	.vmin = 500000,
41	.vmax = 1770000,
42};
43
44static int tps62360_regulator_set_value(struct udevice *dev, int uV)
45{
46	struct tps62360_regulator_pdata *pdata = dev_get_plat(dev);
47	u8 regval;
48
49	if (uV < pdata->config->vmin || uV > pdata->config->vmax)
50		return -EINVAL;
51
52	uV -= pdata->config->vmin;
53
54	uV = DIV_ROUND_UP(uV, TPS62360_VSEL_STEPSIZE);
55
56	if (uV > U8_MAX)
57		return -EINVAL;
58
59	regval = (u8)uV;
60
61	return dm_i2c_write(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset,
62			    &regval, 1);
63}
64
65static int tps62360_regulator_get_value(struct udevice *dev)
66{
67	u8 regval;
68	int ret;
69	struct tps62360_regulator_pdata *pdata = dev_get_plat(dev);
70
71	ret = dm_i2c_read(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset,
72			  &regval, 1);
73	if (ret) {
74		dev_err(dev, "i2c read failed: %d\n", ret);
75		return ret;
76	}
77
78	return (u32)regval * TPS62360_VSEL_STEPSIZE + pdata->config->vmin;
79}
80
81static int tps62360_regulator_probe(struct udevice *dev)
82{
83	struct tps62360_regulator_pdata *pdata = dev_get_plat(dev);
84	u8 vsel0;
85	u8 vsel1;
86	int ret;
87
88	pdata->config = (void *)dev_get_driver_data(dev);
89
90	vsel0 = dev_read_bool(dev, "ti,vsel0-state-high");
91	vsel1 = dev_read_bool(dev, "ti,vsel1-state-high");
92
93	pdata->vsel_offset = vsel0 + vsel1 * 2;
94
95	ret = i2c_get_chip(dev->parent, TPS62360_I2C_CHIP, 1, &pdata->i2c);
96	if (ret) {
97		dev_err(dev, "i2c dev get failed.\n");
98		return ret;
99	}
100
101	return 0;
102}
103
104static const struct dm_regulator_ops tps62360_regulator_ops = {
105	.get_value  = tps62360_regulator_get_value,
106	.set_value  = tps62360_regulator_set_value,
107};
108
109static const struct udevice_id tps62360_regulator_ids[] = {
110	{ .compatible = "ti,tps62360", .data = (ulong)&tps62360_data },
111	{ .compatible = "ti,tps62361", .data = (ulong)&tps62361_data },
112	{ .compatible = "ti,tps62362", .data = (ulong)&tps62360_data },
113	{ .compatible = "ti,tps62363", .data = (ulong)&tps62361_data },
114	{ },
115};
116
117U_BOOT_DRIVER(tps62360_regulator) = {
118	.name = "tps62360_regulator",
119	.id = UCLASS_REGULATOR,
120	.ops = &tps62360_regulator_ops,
121	.of_match = tps62360_regulator_ids,
122	.plat_auto	= sizeof(struct tps62360_regulator_pdata),
123	.probe = tps62360_regulator_probe,
124};
125