e2ad626f8f
It has been pointed out that naming a subsystem "genpd" isn't very self-explanatory and the acronym itself that means Generic PM Domain, is known only by a limited group of people. In a way to improve the situation, let's rename the subsystem to pmdomain, which ideally should indicate that this is about so called Power Domains or "PM domains" as we often also use within the Linux Kernel terminology. Suggested-by: Rafael J. Wysocki <rafael@kernel.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Rafael J. Wysocki <rafael@kernel.org> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20230912221127.487327-1-ulf.hansson@linaro.org
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
// 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);
|