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>
10 #include <power/regulator.h>
11
12 #define TPS62360_REG_SET0 0
13
14 #define TPS62360_I2C_CHIP 0x60
15
16 #define TPS62360_VSEL_STEPSIZE 10000 /* In uV */
17
18 struct tps62360_regulator_config {
19 u32 vmin;
20 u32 vmax;
21 };
22
23 struct tps62360_regulator_pdata {
24 u8 vsel_offset;
25 struct udevice *i2c;
26 struct tps62360_regulator_config *config;
27 };
28
29 /*
30 * TPS62362/TPS62363 are just re-using these values for now, their preset
31 * voltage values are just different compared to TPS62360/TPS62361.
32 */
33 static struct tps62360_regulator_config tps62360_data = {
34 .vmin = 770000,
35 .vmax = 1400000,
36 };
37
38 static struct tps62360_regulator_config tps62361_data = {
39 .vmin = 500000,
40 .vmax = 1770000,
41 };
42
tps62360_regulator_set_value(struct udevice * dev,int uV)43 static int tps62360_regulator_set_value(struct udevice *dev, int uV)
44 {
45 struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev);
46 u8 regval;
47
48 if (uV < pdata->config->vmin || uV > pdata->config->vmax)
49 return -EINVAL;
50
51 uV -= pdata->config->vmin;
52
53 uV = DIV_ROUND_UP(uV, TPS62360_VSEL_STEPSIZE);
54
55 if (uV > U8_MAX)
56 return -EINVAL;
57
58 regval = (u8)uV;
59
60 return dm_i2c_write(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset,
61 ®val, 1);
62 }
63
tps62360_regulator_get_value(struct udevice * dev)64 static int tps62360_regulator_get_value(struct udevice *dev)
65 {
66 u8 regval;
67 int ret;
68 struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev);
69
70 ret = dm_i2c_read(pdata->i2c, TPS62360_REG_SET0 + pdata->vsel_offset,
71 ®val, 1);
72 if (ret) {
73 dev_err(dev, "i2c read failed: %d\n", ret);
74 return ret;
75 }
76
77 return (u32)regval * TPS62360_VSEL_STEPSIZE + pdata->config->vmin;
78 }
79
tps62360_regulator_ofdata_to_platdata(struct udevice * dev)80 static int tps62360_regulator_ofdata_to_platdata(struct udevice *dev)
81 {
82 struct tps62360_regulator_pdata *pdata = dev_get_platdata(dev);
83 u8 vsel0;
84 u8 vsel1;
85 int ret;
86
87 pdata->config = (void *)dev_get_driver_data(dev);
88
89 vsel0 = dev_read_bool(dev, "ti,vsel0-state-high");
90 vsel1 = dev_read_bool(dev, "ti,vsel1-state-high");
91
92 pdata->vsel_offset = vsel0 + vsel1 * 2;
93
94 ret = i2c_get_chip(dev->parent, TPS62360_I2C_CHIP, 1, &pdata->i2c);
95 if (ret) {
96 dev_err(dev, "i2c dev get failed.\n");
97 return ret;
98 }
99
100 return 0;
101 }
102
103 static const struct dm_regulator_ops tps62360_regulator_ops = {
104 .get_value = tps62360_regulator_get_value,
105 .set_value = tps62360_regulator_set_value,
106 };
107
108 static const struct udevice_id tps62360_regulator_ids[] = {
109 { .compatible = "ti,tps62360", .data = (ulong)&tps62360_data },
110 { .compatible = "ti,tps62361", .data = (ulong)&tps62361_data },
111 { .compatible = "ti,tps62362", .data = (ulong)&tps62360_data },
112 { .compatible = "ti,tps62363", .data = (ulong)&tps62361_data },
113 { },
114 };
115
116 U_BOOT_DRIVER(tps62360_regulator) = {
117 .name = "tps62360_regulator",
118 .id = UCLASS_REGULATOR,
119 .ops = &tps62360_regulator_ops,
120 .of_match = tps62360_regulator_ids,
121 .platdata_auto_alloc_size = sizeof(struct tps62360_regulator_pdata),
122 .ofdata_to_platdata = tps62360_regulator_ofdata_to_platdata,
123 };
124