blob: 118f5df6002d58c261d598cf164518a1bc2a591a (
plain)
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
|
/*
* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*/
/* Implementation of per-board power management function */
#include <common.h>
#include <i2c.h>
#include <chromeos/power_management.h>
#define PREFIX "cold_reboot: "
#define PMIC_I2C_BUS 0x00
#define PMIC_I2C_DEVICE_ADDRESS 0x34
#define TPS6586X_SUPPLYENE 0x14
/* This function never returns */
void cold_reboot(void)
{
uint8_t byte;
if (i2c_set_bus_num(PMIC_I2C_BUS)) {
debug(PREFIX "i2c_set_bus_num fail\n");
goto FATAL;
}
if (i2c_read(PMIC_I2C_DEVICE_ADDRESS, TPS6586X_SUPPLYENE, 1,
&byte, sizeof(byte))) {
debug(PREFIX "i2c_read fail\n");
goto FATAL;
}
/* Set TPS6586X_SUPPLYENE bit0 to 1 */
byte |= 1;
if (i2c_write(PMIC_I2C_DEVICE_ADDRESS, TPS6586X_SUPPLYENE, 1,
&byte, sizeof(byte))) {
debug(PREFIX "i2c_write fail\n");
goto FATAL;
}
/* The PMIC will reboot the whole system after 10 ms */
udelay(100);
FATAL:
/* The final solution of doing a cold reboot */
printf("Please press cold reboot button\n");
while (1);
}
|