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git01.mediatek.com / filogic / uboot / 5ec8ff7a5a0d040d905484dd165c0a6b10a4376e / . / drivers / power / regulator / lp87565_regulator.c
blob: f438dea8fc1c619c953faf4a5dd7c8d77315e4ae [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -0400[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
Keerthy22831662017-06-07 19:08:29 +0530[diff] [blame]2/*
3 * (C) Copyright 2017
4 * Texas Instruments Incorporated, <www.ti.com>
5 *
6 * Keerthy <j-keerthy@ti.com>
Keerthy22831662017-06-07 19:08:29 +0530[diff] [blame]7 */
8
9#include <common.h>
10#include <fdtdec.h>
11#include <errno.h>
12#include <dm.h>
13#include <i2c.h>
14#include <power/pmic.h>
15#include <power/regulator.h>
16#include <power/lp87565.h>
17
Keerthy22831662017-06-07 19:08:29 +0530[diff] [blame]18static const char lp87565_buck_ctrl1[LP87565_BUCK_NUM] = {0x2, 0x4, 0x6, 0x8, 0x2, 0x6};
19static const char lp87565_buck_vout[LP87565_BUCK_NUM] = {0xA, 0xC, 0xE, 0x10, 0xA, 0xE };
20
21static int lp87565_buck_enable(struct udevice *dev, int op, bool *enable)
22{
23 int ret;
24 unsigned int adr;
25 struct dm_regulator_uclass_platdata *uc_pdata;
26
27 uc_pdata = dev_get_uclass_platdata(dev);
28 adr = uc_pdata->ctrl_reg;
29
30 ret = pmic_reg_read(dev->parent, adr);
31 if (ret < 0)
32 return ret;
33
34 if (op == PMIC_OP_GET) {
35 ret &= LP87565_BUCK_MODE_MASK;
36
37 if (ret)
38 *enable = true;
39 else
40 *enable = false;
41
42 return 0;
43 } else if (op == PMIC_OP_SET) {
44 if (*enable)
45 ret |= LP87565_BUCK_MODE_MASK;
46 else
47 ret &= ~LP87565_BUCK_MODE_MASK;
48 ret = pmic_reg_write(dev->parent, adr, ret);
49 if (ret)
50 return ret;
51 }
52
53 return 0;
54}
55
56static int lp87565_buck_volt2val(int uV)
57{
58 if (uV > LP87565_BUCK_VOLT_MAX)
59 return -EINVAL;
60 else if (uV > 1400000)
61 return (uV - 1420000) / 20000 + 0x9E;
62 else if (uV > 730000)
63 return (uV - 735000) / 5000 + 0x18;
64 else if (uV >= 500000)
65 return (uV - 500000) / 10000;
66 else
67 return -EINVAL;
68}
69
70static int lp87565_buck_val2volt(int val)
71{
72 if (val > LP87565_BUCK_VOLT_MAX_HEX)
73 return -EINVAL;
74 else if (val > 0x9D)
75 return 1400000 + (val - 0x9D) * 20000;
76 else if (val > 0x17)
77 return 730000 + (val - 0x17) * 5000;
78 else if (val >= 0x0)
79 return 500000 + val * 10000;
80 else
81 return -EINVAL;
82}
83
84static int lp87565_buck_val(struct udevice *dev, int op, int *uV)
85{
86 unsigned int hex, adr;
87 int ret;
88 struct dm_regulator_uclass_platdata *uc_pdata;
89
90 uc_pdata = dev_get_uclass_platdata(dev);
91
92 if (op == PMIC_OP_GET)
93 *uV = 0;
94
95 adr = uc_pdata->volt_reg;
96
97 ret = pmic_reg_read(dev->parent, adr);
98 if (ret < 0)
99 return ret;
100
101 if (op == PMIC_OP_GET) {
102 ret &= LP87565_BUCK_VOLT_MASK;
103 ret = lp87565_buck_val2volt(ret);
104 if (ret < 0)
105 return ret;
106 *uV = ret;
107
108 return 0;
109 }
110
111 hex = lp87565_buck_volt2val(*uV);
112 if (hex < 0)
113 return hex;
114
115 ret &= 0x0;
116 ret = hex;
117
118 ret = pmic_reg_write(dev->parent, adr, ret);
119
120 return ret;
121}
122
123static int lp87565_buck_probe(struct udevice *dev)
124{
125 struct dm_regulator_uclass_platdata *uc_pdata;
126 int idx;
127
128 uc_pdata = dev_get_uclass_platdata(dev);
129 uc_pdata->type = REGULATOR_TYPE_BUCK;
130
131 idx = dev->driver_data;
132 if (idx == 0 || idx == 1 || idx == 2 || idx == 3) {
133 debug("Single phase regulator\n");
134 } else if (idx == 23) {
135 idx = 5;
136 } else if (idx == 10) {
137 idx = 4;
138 } else {
139 printf("Wrong ID for regulator\n");
140 return -EINVAL;
141 }
142
143 uc_pdata->ctrl_reg = lp87565_buck_ctrl1[idx];
144 uc_pdata->volt_reg = lp87565_buck_vout[idx];
145
146 return 0;
147}
148
149static int buck_get_value(struct udevice *dev)
150{
151 int uV;
152 int ret;
153
154 ret = lp87565_buck_val(dev, PMIC_OP_GET, &uV);
155 if (ret)
156 return ret;
157
158 return uV;
159}
160
161static int buck_set_value(struct udevice *dev, int uV)
162{
163 return lp87565_buck_val(dev, PMIC_OP_SET, &uV);
164}
165
Keerthy968771a2017-06-13 09:53:56 +0530[diff] [blame]166static int buck_get_enable(struct udevice *dev)
Keerthy22831662017-06-07 19:08:29 +0530[diff] [blame]167{
168 bool enable = false;
169 int ret;
170
171
172 ret = lp87565_buck_enable(dev, PMIC_OP_GET, &enable);
173 if (ret)
174 return ret;
175
176 return enable;
177}
178
179static int buck_set_enable(struct udevice *dev, bool enable)
180{
181 return lp87565_buck_enable(dev, PMIC_OP_SET, &enable);
182}
183
184static const struct dm_regulator_ops lp87565_buck_ops = {
185 .get_value = buck_get_value,
186 .set_value = buck_set_value,
187 .get_enable = buck_get_enable,
188 .set_enable = buck_set_enable,
189};
190
191U_BOOT_DRIVER(lp87565_buck) = {
192 .name = LP87565_BUCK_DRIVER,
193 .id = UCLASS_REGULATOR,
194 .ops = &lp87565_buck_ops,
195 .probe = lp87565_buck_probe,
196};