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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <boardid.h>
#include <console/console.h>
#include <delay.h>
#include <device/i2c_simple.h>
#include <stdint.h>
#include <reset.h>
#include "pmic.h"
enum {
AS3722_I2C_ADDR = 0x40
};
struct as3722_init_reg {
u8 reg;
u8 val;
u8 delay;
};
static struct as3722_init_reg init_list[] = {
{AS3722_SDO0, 0x3C, 1},
{AS3722_SDO1, 0x32, 0},
{AS3722_LDO3, 0x59, 0},
{AS3722_SDO2, 0x3C, 0},
{AS3722_SDO3, 0x00, 0},
{AS3722_SDO4, 0x00, 0},
{AS3722_SDO5, 0x50, 0},
{AS3722_SDO6, 0x28, 1},
{AS3722_LDO0, 0x8A, 0},
{AS3722_LDO1, 0x00, 0},
{AS3722_LDO2, 0x10, 0},
{AS3722_LDO4, 0x00, 0},
{AS3722_LDO5, 0x00, 0},
{AS3722_LDO6, 0x00, 0},
{AS3722_LDO7, 0x00, 0},
{AS3722_LDO9, 0x00, 0},
{AS3722_LDO10, 0x00, 0},
{AS3722_LDO11, 0x00, 1},
};
static void pmic_write_reg(unsigned int bus, uint8_t reg, uint8_t val, int do_delay)
{
if (i2c_writeb(bus, AS3722_I2C_ADDR, reg, val)) {
printk(BIOS_ERR, "%s: reg = 0x%02X, value = 0x%02X failed!\n",
__func__, reg, val);
/* Reset the SoC on any PMIC write error */
board_reset();
} else {
if (do_delay)
udelay(500);
}
}
static void pmic_slam_defaults(unsigned int bus)
{
int i;
for (i = 0; i < ARRAY_SIZE(init_list); i++) {
struct as3722_init_reg *reg = &init_list[i];
pmic_write_reg(bus, reg->reg, reg->val, reg->delay);
}
}
void pmic_init(unsigned int bus)
{
/*
* Don't need to set up VDD_CORE - already done - by OTP
* Don't write SDCONTROL - it's already 0x7F, i.e. all SDs enabled.
* Don't write LDCONTROL - it's already 0xFF, i.e. all LDOs enabled.
*/
/* Restore PMIC POR defaults, in case kernel changed 'em */
pmic_slam_defaults(bus);
/* First set VDD_CPU to 1.2V, then enable the VDD_CPU regulator. */
pmic_write_reg(bus, 0x00, 0x50, 1);
/* First set VDD_GPU to 1.0V, then enable the VDD_GPU regulator. */
pmic_write_reg(bus, 0x06, 0x28, 1);
/*
* First set +1.2V_GEN_AVDD to 1.2V, then enable the +1.2V_GEN_AVDD
* regulator.
*/
pmic_write_reg(bus, 0x12, 0x10, 1);
/*
* Panel power GPIO O4. Set mode for GPIO4 (0x0c to 7), then set
* the value (register 0x20 bit 4)
*/
pmic_write_reg(bus, 0x0c, 0x07, 0);
pmic_write_reg(bus, 0x20, 0x10, 1);
}
|
