forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 23
/
pm_secure.c
64 lines (51 loc) · 1.37 KB
/
pm_secure.c
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
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2012, Bootlin
*/
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/parser.h>
#include <linux/string.h>
#include "generic.h"
#include "sam_secure.h"
#include "pm.h"
static int suspend_mode = AT91_PM_ULP0;
static void at91_pm_secure_init(void)
{
struct arm_smccc_res res;
res = sam_smccc_call(SAMA5_SMC_SIP_SET_SUSPEND_MODE, suspend_mode, 0);
if (res.a0 == 0) {
pr_info("AT91: Secure PM: suspend mode set to %s\n",
pm_modes[suspend_mode].pattern);
return;
}
pr_warn("AT91: Secure PM: %s mode not supported !\n",
pm_modes[suspend_mode].pattern);
res = sam_smccc_call(SAMA5_SMC_SIP_GET_SUSPEND_MODE, 0, 0);
if (res.a0 == 0) {
pr_warn("AT91: Secure PM: failed to get default mode\n");
return;
}
suspend_mode = res.a1;
pr_info("AT91: Secure PM: using default suspend mode %s\n",
pm_modes[suspend_mode].pattern);
}
void __init sama5_pm_init(void)
{
}
void __init sama5d2_pm_init(void)
{
at91_pm_secure_init();
}
int at91_suspend_entering_slow_clock(void)
{
return (suspend_mode >= AT91_PM_ULP0);
}
EXPORT_SYMBOL(at91_suspend_entering_slow_clock);
static int __init at91_pm_modes_select(char *str)
{
int dummy;
pr_warn("AT91: Secure PM: ignoring standby mode\n");
return at91_pm_common_modes_select(str, &dummy, &suspend_mode);
}
early_param("atmel.pm_modes", at91_pm_modes_select);