ARM: ux500: Initial support for PM domains (cd931dcf) · Commits · 戴 / test

arch/arm/mach-ux500/Makefile

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		@@ -9,5 +9,6 @@ obj-$(CONFIG_MACH_MOP500) += board-mop500-regulators.o \
		board-mop500-audio.o
		obj-$(CONFIG_SMP) += platsmp.o headsmp.o
		obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
		obj-$(CONFIG_PM_GENERIC_DOMAINS) += pm_domains.o

		CFLAGS_hotplug.o += -march=armv7-a

arch/arm/mach-ux500/pm.c

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		@@ -17,6 +17,7 @@
		#include <linux/platform_data/arm-ux500-pm.h>

		#include "db8500-regs.h"
		#include "pm_domains.h"

		/* ARM WFI Standby signal register */
		#define PRCM_ARM_WFI_STANDBY (prcmu_base + 0x130)
		@@ -191,4 +192,7 @@ void __init ux500_pm_init(u32 phy_base, u32 size)

		/* Set up ux500 suspend callbacks. */
		suspend_set_ops(UX500_SUSPEND_OPS);

		/* Initialize ux500 power domains */
		ux500_pm_domains_init();
		}

arch/arm/mach-ux500/pm_domains.c

0 → 100644

+79 −0

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		/*
		* Copyright (C) 2014 Linaro Ltd.
		*
		* Author: Ulf Hansson <ulf.hansson@linaro.org>
		* License terms: GNU General Public License (GPL) version 2
		*
		* 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 struct of_device_id ux500_pm_domain_matches[] = {
		{ .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;
		}

arch/arm/mach-ux500/pm_domains.h

0 → 100644

+17 −0

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		/*
		* Copyright (C) 2014 Linaro Ltd.
		*
		* Author: Ulf Hansson <ulf.hansson@linaro.org>
		* License terms: GNU General Public License (GPL) version 2
		*/

		#ifndef __MACH_UX500_PM_DOMAINS_H
		#define __MACH_UX500_PM_DOMAINS_H

		#ifdef CONFIG_PM_GENERIC_DOMAINS
		extern int __init ux500_pm_domains_init(void);
		#else
		static inline int ux500_pm_domains_init(void) { return 0; }
		#endif

		#endif

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