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
18static 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
30static 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
42static 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
48static struct generic_pm_domain *ux500_pm_domains[NR_DOMAINS] = {
49	[DOMAIN_VAPE] = &ux500_pm_domain_vape,
50};
51
52static const struct of_device_id ux500_pm_domain_matches[] __initconst = {
53	{ .compatible = "stericsson,ux500-pm-domains", },
54	{ },
55};
56
57int __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}
80