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git01.mediatek.com / filogic / uboot / 9bc1564e0d5b9cfcd5eef7fe83fae233ff2faba6 / . / drivers / power / regulator / tps62360_regulator.c
blob: ce54495490d179513d8e1d925e55d6df7ff3f3a5 [file] [log] [blame]
Tero Kristodaec3412019-10-24 15:00:48 +0530[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
4 * Tero Kristo <t-kristo@ti.com>
5 */
6
7#include <common.h>
8#include <dm.h>
9#include <i2c.h>
Simon Glass9bc15642020-02-03 07:36:16 -0700[diff] [blame^]10#include <dm/device_compat.h>
Tero Kristodaec3412019-10-24 15:00:48 +0530[diff] [blame]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_platdata(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_platdata(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
Keerthycdd05ef2020-01-10 14:52:05 +0530[diff] [blame]81static int tps62360_regulator_probe(struct udevice *dev)
Tero Kristodaec3412019-10-24 15:00:48 +0530[diff] [blame]82{
83 struct tps62360_regulator_pdata *pdata = dev_get_platdata(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 .platdata_auto_alloc_size = sizeof(struct tps62360_regulator_pdata),
Keerthycdd05ef2020-01-10 14:52:05 +0530[diff] [blame]123 .probe = tps62360_regulator_probe,
Tero Kristodaec3412019-10-24 15:00:48 +0530[diff] [blame]124};