1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
* Copyright (C) 2012 Samsung Electronics
* Alim Akhtar <alim.akhtar@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <smbus.h>
#include <max77686.h>
/* Chip register numbers (not exported from this module) */
enum {
REG_BBAT = 0x7e,
/* Bits for BBAT */
BBAT_BBCHOSTEN_MASK = 1 << 0,
BBAT_BBCVS_SHIFT = 3,
BBAT_BBCVS_MASK = 3 << BBAT_BBCVS_SHIFT,
};
/*
* Max77686 parameters values
* see max77686.h for parameters details
*/
struct max77686_para max77686_param[] = {/*{regnum, vol_addr, vol_bitpos,
vol_bitmask, reg_enaddr, reg_enbitpos, reg_enbitmask, reg_enbiton,
reg_enbitoff, vol_min, vol_div}*/
{PMIC_BUCK1, 0x11, 0x0, 0x3F, 0x10, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK2, 0x14, 0x0, 0xFF, 0x12, 0x4, 0x3, 0x1, 0x0, 600, 12500},
{PMIC_BUCK3, 0x1E, 0x0, 0xFF, 0x1C, 0x4, 0x3, 0x1, 0x0, 600, 12500},
{PMIC_BUCK4, 0x28, 0x0, 0xFF, 0x26, 0x4, 0x3, 0x1, 0x0, 600, 12500},
{PMIC_BUCK5, 0x31, 0x0, 0x3F, 0x30, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK6, 0x33, 0x0, 0x3F, 0x32, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK7, 0x35, 0x0, 0x3F, 0x34, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK8, 0x37, 0x0, 0x3F, 0x36, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_BUCK9, 0x39, 0x0, 0x3F, 0x38, 0x0, 0x3, 0x3, 0x0, 750, 50000},
{PMIC_LDO1, 0x40, 0x0, 0x3F, 0x40, 0x6, 0x3, 0x3, 0x0, 800, 25000},
{PMIC_LDO2, 0x41, 0x0, 0x3F, 0x41, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO3, 0x42, 0x0, 0x3F, 0x42, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO4, 0x43, 0x0, 0x3F, 0x43, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO5, 0x44, 0x0, 0x3F, 0x44, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO6, 0x45, 0x0, 0x3F, 0x45, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO7, 0x46, 0x0, 0x3F, 0x46, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO8, 0x47, 0x0, 0x3F, 0x47, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO9, 0x48, 0x0, 0x3F, 0x48, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO10, 0x49, 0x0, 0x3F, 0x49, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO11, 0x4A, 0x0, 0x3F, 0x4A, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO12, 0x4B, 0x0, 0x3F, 0x4B, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO13, 0x4C, 0x0, 0x3F, 0x4C, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO14, 0x4D, 0x0, 0x3F, 0x4D, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO15, 0x4E, 0x0, 0x3F, 0x4E, 0x6, 0x3, 0x1, 0x0, 800, 25000},
{PMIC_LDO16, 0x4F, 0x0, 0x3F, 0x4F, 0x6, 0x3, 0x1, 0x0, 800, 50000},
{PMIC_LDO17, 0x50, 0x0, 0x3F, 0x50, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO18, 0x51, 0x0, 0x3F, 0x51, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO19, 0x52, 0x0, 0x3F, 0x52, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO20, 0x53, 0x0, 0x3F, 0x53, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO21, 0x54, 0x0, 0x3F, 0x54, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO22, 0x55, 0x0, 0x3F, 0x55, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO23, 0x56, 0x0, 0x3F, 0x56, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO24, 0x57, 0x0, 0x3F, 0x57, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO25, 0x58, 0x0, 0x3F, 0x58, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_LDO26, 0x59, 0x0, 0x3F, 0x59, 0x6, 0x3, 0x3, 0x0, 800, 50000},
{PMIC_EN32KHZ_CP, 0x0, 0x0, 0x0, 0x7F, 0x1, 0x1, 0x1, 0x0, 0x0, 0x0},
};
/*
* Write a value to a register
*
* @param chip_addr i2c addr for max77686
* @param reg reg number to write
* @param val value to be written
*
*/
static inline int max77686_i2c_write(unsigned char chip_addr,
unsigned int reg, unsigned char val)
{
return i2c_write(chip_addr, reg, 1, &val, 1);
}
/*
* Read a value from a register
*
* @param chip_addr i2c addr for max77686
* @param reg reg number to write
* @param val value to be written
*
*/
static inline int max77686_i2c_read(unsigned char chip_addr,
unsigned int reg, unsigned char *val)
{
return i2c_read(chip_addr, reg, 1, val, 1);
}
/*
* Enable the max77686 register
*
* @param reg register number of buck/ldo to be enabled
* @param enable enable or disable bit
*
* REG_DISABLE = 0,
needed to set the buck/ldo enable bit OFF
* @return Return 0 if ok, else -1
*/
static int max77686_enablereg(enum max77686_regnum reg, int enable)
{
struct max77686_para *pmic;
unsigned char read_data;
int ret;
pmic = &max77686_param[reg];
ret = max77686_i2c_read(MAX77686_I2C_ADDR, pmic->reg_enaddr,
&read_data);
if (ret != 0) {
debug("max77686 i2c read failed.\n");
return -1;
}
if (enable == REG_DISABLE) {
clrbits_8(&read_data,
pmic->reg_enbitmask << pmic->reg_enbitpos);
} else {
clrsetbits_8(&read_data,
pmic->reg_enbitmask << pmic->reg_enbitpos,
pmic->reg_enbiton << pmic->reg_enbitpos);
}
ret = max77686_i2c_write(MAX77686_I2C_ADDR,
pmic->reg_enaddr, read_data);
if (ret != 0) {
debug("max77686 i2c write failed.\n");
return -1;
}
return 0;
}
static int max77686_do_volsetting(enum max77686_regnum reg, unsigned int volt,
int enable, int volt_units)
{
struct max77686_para *pmic;
unsigned char read_data;
int vol_level = 0;
int ret;
pmic = &max77686_param[reg];
if (pmic->vol_addr == 0) {
debug("not a voltage register.\n");
return -1;
}
ret = max77686_i2c_read(MAX77686_I2C_ADDR, pmic->vol_addr, &read_data);
if (ret != 0) {
debug("max77686 i2c read failed.\n");
return -1;
}
if (volt_units == MAX77686_UV)
vol_level = volt - pmic->vol_min * 1000;
else
vol_level = (volt - pmic->vol_min) * 1000;
if (vol_level < 0) {
debug("Not a valid voltage level to set\n");
return -1;
}
vol_level /= pmic->vol_div;
clrsetbits_8(&read_data, pmic->vol_bitmask << pmic->vol_bitpos,
vol_level << pmic->vol_bitpos);
ret = max77686_i2c_write(MAX77686_I2C_ADDR, pmic->vol_addr, read_data);
if (ret != 0) {
debug("max77686 i2c write failed.\n");
return -1;
}
ret = max77686_enablereg(reg, enable);
if (ret != 0) {
debug("Failed to enable buck/ldo.\n");
return -1;
}
return 0;
}
int max77686_volsetting(enum max77686_regnum reg, unsigned int volt,
int enable, int volt_units)
{
int old_bus = i2c_get_bus_num();
int ret;
i2c_set_bus_num(0);
ret = max77686_do_volsetting(reg, volt, enable, volt_units);
i2c_set_bus_num(old_bus);
return ret;
}
int max77686_enable_32khz_cp(void)
{
i2c_set_bus_num(0);
return max77686_enablereg(PMIC_EN32KHZ_CP, REG_ENABLE);
}
int max77686_disable_backup_batt(void)
{
unsigned char val;
int ret;
i2c_set_bus_num(0);
ret = max77686_i2c_read(MAX77686_I2C_ADDR, REG_BBAT, &val);
if (ret) {
debug("max77686 i2c read failed\n");
return ret;
}
/* If we already have the correct values, exit */
if ((val & (BBAT_BBCVS_MASK | BBAT_BBCHOSTEN_MASK)) ==
BBAT_BBCVS_MASK)
return 0;
/* First disable charging */
val &= ~BBAT_BBCHOSTEN_MASK;
ret = max77686_i2c_write(MAX77686_I2C_ADDR, REG_BBAT, val);
if (ret) {
debug("max77686 i2c write failed\n");
return -1;
}
/* Finally select 3.5V to minimize power consumption */
val |= BBAT_BBCVS_MASK;
ret = max77686_i2c_write(MAX77686_I2C_ADDR, REG_BBAT, val);
if (ret) {
debug("max77686 i2c write failed\n");
return -1;
}
return 0;
}
|
