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// 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/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>
#include "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[] __initconst = {
{ .compatible = "stericsson,ux500-pm-domains", },
{ },
};
int __init ux500_pm_domains_init(void)
{
struct device_node *np;
struct genpd_onecell_data *genpd_data;
int i;
np = of_find_matching_node(NULL, ux500_pm_domain_matches);
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;
}
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