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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 Paul Cercueil <paul@crapouillou.net>
*/
#include "cgu.h"
#include "pm.h"
#include <linux/io.h>
#include <linux/syscore_ops.h>
#define CGU_REG_LCR 0x04
#define LCR_LOW_POWER_MODE BIT(0)
static void __iomem * __maybe_unused ingenic_cgu_base;
static int __maybe_unused ingenic_cgu_pm_suspend(void *data)
{
u32 val = readl(ingenic_cgu_base + CGU_REG_LCR);
writel(val | LCR_LOW_POWER_MODE, ingenic_cgu_base + CGU_REG_LCR);
return 0;
}
static void __maybe_unused ingenic_cgu_pm_resume(void *data)
{
u32 val = readl(ingenic_cgu_base + CGU_REG_LCR);
writel(val & ~LCR_LOW_POWER_MODE, ingenic_cgu_base + CGU_REG_LCR);
}
static const struct syscore_ops __maybe_unused ingenic_cgu_pm_ops = {
.suspend = ingenic_cgu_pm_suspend,
.resume = ingenic_cgu_pm_resume,
};
static struct syscore __maybe_unused ingenic_cgu_pm = {
.ops = &ingenic_cgu_pm_ops,
};
void ingenic_cgu_register_syscore(struct ingenic_cgu *cgu)
{
if (IS_ENABLED(CONFIG_PM_SLEEP)) {
ingenic_cgu_base = cgu->base;
register_syscore(&ingenic_cgu_pm);
}
}
|
