]>
Commit | Line | Data |
---|---|---|
cd931dcf UH |
1 | /* |
2 | * Copyright (C) 2014 Linaro Ltd. | |
3 | * | |
4 | * Author: Ulf Hansson <ulf.hansson@linaro.org> | |
5 | * License terms: GNU General Public License (GPL) version 2 | |
6 | * | |
7 | * Implements PM domains using the generic PM domain for ux500. | |
8 | */ | |
9 | #include <linux/printk.h> | |
10 | #include <linux/slab.h> | |
11 | #include <linux/err.h> | |
12 | #include <linux/of.h> | |
13 | #include <linux/pm_domain.h> | |
14 | ||
15 | #include <dt-bindings/arm/ux500_pm_domains.h> | |
16 | #include "pm_domains.h" | |
17 | ||
18 | static int pd_power_off(struct generic_pm_domain *domain) | |
19 | { | |
20 | /* | |
21 | * Handle the gating of the PM domain regulator here. | |
22 | * | |
23 | * Drivers/subsystems handling devices in the PM domain needs to perform | |
24 | * register context save/restore from their respective runtime PM | |
25 | * callbacks, to be able to enable PM domain gating/ungating. | |
26 | */ | |
27 | return 0; | |
28 | } | |
29 | ||
30 | static int pd_power_on(struct generic_pm_domain *domain) | |
31 | { | |
32 | /* | |
33 | * Handle the ungating of the PM domain regulator here. | |
34 | * | |
35 | * Drivers/subsystems handling devices in the PM domain needs to perform | |
36 | * register context save/restore from their respective runtime PM | |
37 | * callbacks, to be able to enable PM domain gating/ungating. | |
38 | */ | |
39 | return 0; | |
40 | } | |
41 | ||
42 | static struct generic_pm_domain ux500_pm_domain_vape = { | |
43 | .name = "VAPE", | |
44 | .power_off = pd_power_off, | |
45 | .power_on = pd_power_on, | |
46 | }; | |
47 | ||
48 | static struct generic_pm_domain *ux500_pm_domains[NR_DOMAINS] = { | |
49 | [DOMAIN_VAPE] = &ux500_pm_domain_vape, | |
50 | }; | |
51 | ||
52 | static struct of_device_id ux500_pm_domain_matches[] = { | |
53 | { .compatible = "stericsson,ux500-pm-domains", }, | |
54 | { }, | |
55 | }; | |
56 | ||
57 | int __init ux500_pm_domains_init(void) | |
58 | { | |
59 | struct device_node *np; | |
60 | struct genpd_onecell_data *genpd_data; | |
61 | int i; | |
62 | ||
63 | np = of_find_matching_node(NULL, ux500_pm_domain_matches); | |
64 | if (!np) | |
65 | return -ENODEV; | |
66 | ||
67 | genpd_data = kzalloc(sizeof(*genpd_data), GFP_KERNEL); | |
68 | if (!genpd_data) | |
69 | return -ENOMEM; | |
70 | ||
71 | genpd_data->domains = ux500_pm_domains; | |
72 | genpd_data->num_domains = ARRAY_SIZE(ux500_pm_domains); | |
73 | ||
74 | for (i = 0; i < ARRAY_SIZE(ux500_pm_domains); ++i) | |
75 | pm_genpd_init(ux500_pm_domains[i], NULL, false); | |
76 | ||
77 | of_genpd_add_provider_onecell(np, genpd_data); | |
78 | return 0; | |
79 | } |