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Thomas Gleixneraf873fc2019-05-28 09:57:21 -07001// SPDX-License-Identifier: GPL-2.0-only
Ulf Hanssoncd931dc2014-10-14 11:12:56 +02002/*
3 * Copyright (C) 2014 Linaro Ltd.
4 *
5 * Author: Ulf Hansson <ulf.hansson@linaro.org>
Ulf Hanssoncd931dc2014-10-14 11:12:56 +02006 *
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
Uwe Kleine-König444d2d32015-02-18 21:19:56 +010052static const struct of_device_id ux500_pm_domain_matches[] __initconst = {
Ulf Hanssoncd931dc2014-10-14 11:12:56 +020053 { .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}