mirror of https://gitee.com/openkylin/linux.git
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*
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* Copyright (C) 2014 Linaro Ltd.
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*
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* Author: Ulf Hansson <ulf.hansson@linaro.org>
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* License terms: GNU General Public License (GPL) version 2
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*
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* Implements PM domains using the generic PM domain for ux500.
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*/
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#include <linux/printk.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/pm_domain.h>
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#include <dt-bindings/arm/ux500_pm_domains.h>
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#include "pm_domains.h"
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static int pd_power_off(struct generic_pm_domain *domain)
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{
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/*
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* Handle the gating of the PM domain regulator here.
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*
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* Drivers/subsystems handling devices in the PM domain needs to perform
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* register context save/restore from their respective runtime PM
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* callbacks, to be able to enable PM domain gating/ungating.
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*/
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return 0;
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}
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static int pd_power_on(struct generic_pm_domain *domain)
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{
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/*
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* Handle the ungating of the PM domain regulator here.
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*
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* Drivers/subsystems handling devices in the PM domain needs to perform
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* register context save/restore from their respective runtime PM
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* callbacks, to be able to enable PM domain gating/ungating.
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*/
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return 0;
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}
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static struct generic_pm_domain ux500_pm_domain_vape = {
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.name = "VAPE",
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.power_off = pd_power_off,
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.power_on = pd_power_on,
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};
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static struct generic_pm_domain *ux500_pm_domains[NR_DOMAINS] = {
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[DOMAIN_VAPE] = &ux500_pm_domain_vape,
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};
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static const struct of_device_id ux500_pm_domain_matches[] __initconst = {
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{ .compatible = "stericsson,ux500-pm-domains", },
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{ },
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};
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int __init ux500_pm_domains_init(void)
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{
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struct device_node *np;
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struct genpd_onecell_data *genpd_data;
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int i;
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np = of_find_matching_node(NULL, ux500_pm_domain_matches);
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if (!np)
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return -ENODEV;
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genpd_data = kzalloc(sizeof(*genpd_data), GFP_KERNEL);
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if (!genpd_data)
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return -ENOMEM;
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genpd_data->domains = ux500_pm_domains;
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genpd_data->num_domains = ARRAY_SIZE(ux500_pm_domains);
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for (i = 0; i < ARRAY_SIZE(ux500_pm_domains); ++i)
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pm_genpd_init(ux500_pm_domains[i], NULL, false);
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of_genpd_add_provider_onecell(np, genpd_data);
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return 0;
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}
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