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git01.mediatek.com / filogic / uboot / 22831664054b22d5d74cb0ea7ffec4f0866f10bf / . / drivers / power / regulator / lp87565_regulator.c
blob: 2a0b8ca64236e83a86a86ecba46bb7889358f160 [file] [log] [blame]
Keerthy22831662017-06-07 19:08:29 +0530[diff] [blame^]1/*
2 * (C) Copyright 2017
3 * Texas Instruments Incorporated, <www.ti.com>
4 *
5 * Keerthy <j-keerthy@ti.com>
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10#include <common.h>
11#include <fdtdec.h>
12#include <errno.h>
13#include <dm.h>
14#include <i2c.h>
15#include <power/pmic.h>
16#include <power/regulator.h>
17#include <power/lp87565.h>
18
19DECLARE_GLOBAL_DATA_PTR;
20
21static const char lp87565_buck_ctrl1[LP87565_BUCK_NUM] = {0x2, 0x4, 0x6, 0x8, 0x2, 0x6};
22static const char lp87565_buck_vout[LP87565_BUCK_NUM] = {0xA, 0xC, 0xE, 0x10, 0xA, 0xE };
23
24static int lp87565_buck_enable(struct udevice *dev, int op, bool *enable)
25{
26 int ret;
27 unsigned int adr;
28 struct dm_regulator_uclass_platdata *uc_pdata;
29
30 uc_pdata = dev_get_uclass_platdata(dev);
31 adr = uc_pdata->ctrl_reg;
32
33 ret = pmic_reg_read(dev->parent, adr);
34 if (ret < 0)
35 return ret;
36
37 if (op == PMIC_OP_GET) {
38 ret &= LP87565_BUCK_MODE_MASK;
39
40 if (ret)
41 *enable = true;
42 else
43 *enable = false;
44
45 return 0;
46 } else if (op == PMIC_OP_SET) {
47 if (*enable)
48 ret |= LP87565_BUCK_MODE_MASK;
49 else
50 ret &= ~LP87565_BUCK_MODE_MASK;
51 ret = pmic_reg_write(dev->parent, adr, ret);
52 if (ret)
53 return ret;
54 }
55
56 return 0;
57}
58
59static int lp87565_buck_volt2val(int uV)
60{
61 if (uV > LP87565_BUCK_VOLT_MAX)
62 return -EINVAL;
63 else if (uV > 1400000)
64 return (uV - 1420000) / 20000 + 0x9E;
65 else if (uV > 730000)
66 return (uV - 735000) / 5000 + 0x18;
67 else if (uV >= 500000)
68 return (uV - 500000) / 10000;
69 else
70 return -EINVAL;
71}
72
73static int lp87565_buck_val2volt(int val)
74{
75 if (val > LP87565_BUCK_VOLT_MAX_HEX)
76 return -EINVAL;
77 else if (val > 0x9D)
78 return 1400000 + (val - 0x9D) * 20000;
79 else if (val > 0x17)
80 return 730000 + (val - 0x17) * 5000;
81 else if (val >= 0x0)
82 return 500000 + val * 10000;
83 else
84 return -EINVAL;
85}
86
87static int lp87565_buck_val(struct udevice *dev, int op, int *uV)
88{
89 unsigned int hex, adr;
90 int ret;
91 struct dm_regulator_uclass_platdata *uc_pdata;
92
93 uc_pdata = dev_get_uclass_platdata(dev);
94
95 if (op == PMIC_OP_GET)
96 *uV = 0;
97
98 adr = uc_pdata->volt_reg;
99
100 ret = pmic_reg_read(dev->parent, adr);
101 if (ret < 0)
102 return ret;
103
104 if (op == PMIC_OP_GET) {
105 ret &= LP87565_BUCK_VOLT_MASK;
106 ret = lp87565_buck_val2volt(ret);
107 if (ret < 0)
108 return ret;
109 *uV = ret;
110
111 return 0;
112 }
113
114 hex = lp87565_buck_volt2val(*uV);
115 if (hex < 0)
116 return hex;
117
118 ret &= 0x0;
119 ret = hex;
120
121 ret = pmic_reg_write(dev->parent, adr, ret);
122
123 return ret;
124}
125
126static int lp87565_buck_probe(struct udevice *dev)
127{
128 struct dm_regulator_uclass_platdata *uc_pdata;
129 int idx;
130
131 uc_pdata = dev_get_uclass_platdata(dev);
132 uc_pdata->type = REGULATOR_TYPE_BUCK;
133
134 idx = dev->driver_data;
135 if (idx == 0 || idx == 1 || idx == 2 || idx == 3) {
136 debug("Single phase regulator\n");
137 } else if (idx == 23) {
138 idx = 5;
139 } else if (idx == 10) {
140 idx = 4;
141 } else {
142 printf("Wrong ID for regulator\n");
143 return -EINVAL;
144 }
145
146 uc_pdata->ctrl_reg = lp87565_buck_ctrl1[idx];
147 uc_pdata->volt_reg = lp87565_buck_vout[idx];
148
149 return 0;
150}
151
152static int buck_get_value(struct udevice *dev)
153{
154 int uV;
155 int ret;
156
157 ret = lp87565_buck_val(dev, PMIC_OP_GET, &uV);
158 if (ret)
159 return ret;
160
161 return uV;
162}
163
164static int buck_set_value(struct udevice *dev, int uV)
165{
166 return lp87565_buck_val(dev, PMIC_OP_SET, &uV);
167}
168
169static bool buck_get_enable(struct udevice *dev)
170{
171 bool enable = false;
172 int ret;
173
174
175 ret = lp87565_buck_enable(dev, PMIC_OP_GET, &enable);
176 if (ret)
177 return ret;
178
179 return enable;
180}
181
182static int buck_set_enable(struct udevice *dev, bool enable)
183{
184 return lp87565_buck_enable(dev, PMIC_OP_SET, &enable);
185}
186
187static const struct dm_regulator_ops lp87565_buck_ops = {
188 .get_value = buck_get_value,
189 .set_value = buck_set_value,
190 .get_enable = buck_get_enable,
191 .set_enable = buck_set_enable,
192};
193
194U_BOOT_DRIVER(lp87565_buck) = {
195 .name = LP87565_BUCK_DRIVER,
196 .id = UCLASS_REGULATOR,
197 .ops = &lp87565_buck_ops,
198 .probe = lp87565_buck_probe,
199};