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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2014 Linaro Ltd.
*
* Author: Ulf Hansson <ulf.hansson@linaro.org>
*
* Implements PM domains using the generic PM domain for ux500.
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/printk.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/pm_domain.h>
#include <dt-bindings/arm/ux500_pm_domains.h>
static int pd_power_off(struct generic_pm_domain *domain)
{
/*
* Handle the gating of the PM domain regulator here.
*
* Drivers/subsystems handling devices in the PM domain needs to perform
* register context save/restore from their respective runtime PM
* callbacks, to be able to enable PM domain gating/ungating.
*/
return 0;
}
static int pd_power_on(struct generic_pm_domain *domain)
{
/*
* Handle the ungating of the PM domain regulator here.
*
* Drivers/subsystems handling devices in the PM domain needs to perform
* register context save/restore from their respective runtime PM
* callbacks, to be able to enable PM domain gating/ungating.
*/
return 0;
}
static struct generic_pm_domain ux500_pm_domain_vape = {
.name = "VAPE",
.power_off = pd_power_off,
.power_on = pd_power_on,
};
static struct generic_pm_domain *ux500_pm_domains[NR_DOMAINS] = {
[DOMAIN_VAPE] = &ux500_pm_domain_vape,
};
static const struct of_device_id ux500_pm_domain_matches[] = {
{ .compatible = "stericsson,ux500-pm-domains", },
{ },
};
static int ux500_pm_domains_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct genpd_onecell_data *genpd_data;
int i;
if (!np)
return -ENODEV;
genpd_data = kzalloc(sizeof(*genpd_data), GFP_KERNEL);
if (!genpd_data)
return -ENOMEM;
genpd_data->domains = ux500_pm_domains;
genpd_data->num_domains = ARRAY_SIZE(ux500_pm_domains);
for (i = 0; i < ARRAY_SIZE(ux500_pm_domains); ++i)
pm_genpd_init(ux500_pm_domains[i], NULL, false);
of_genpd_add_provider_onecell(np, genpd_data);
return 0;
}
static struct platform_driver ux500_pm_domains_driver = {
.probe = ux500_pm_domains_probe,
.driver = {
.name = "ux500_pm_domains",
.of_match_table = ux500_pm_domain_matches,
},
};
static int __init ux500_pm_domains_init(void)
{
return platform_driver_register(&ux500_pm_domains_driver);
}
arch_initcall(ux500_pm_domains_init);
|
