powerpc/85xx/86xx: Add suspend/resume support (4ffd6952) · Commits · 戴 / test

arch/powerpc/Kconfig

+10 −1

Original line number	Diff line number	Diff line
		@@ -215,7 +215,8 @@ config ARCH_HIBERNATION_POSSIBLE

		config ARCH_SUSPEND_POSSIBLE
		def_bool y
		depends on ADB_PMU \|\| PPC_EFIKA \|\| PPC_LITE5200 \|\| PPC_83xx
		depends on ADB_PMU \|\| PPC_EFIKA \|\| PPC_LITE5200 \|\| PPC_83xx \|\| \
		PPC_85xx \|\| PPC_86xx

		config PPC_DCR_NATIVE
		bool
		@@ -664,6 +665,14 @@ config FSL_PCI
		select PPC_INDIRECT_PCI
		select PCI_QUIRKS

		config FSL_PMC
		bool
		default y
		depends on SUSPEND && (PPC_85xx \|\| PPC_86xx)
		help
		Freescale MPC85xx/MPC86xx power management controller support
		(suspend/resume). For MPC83xx see platforms/83xx/suspend.c

		config 4xx_SOC
		bool

arch/powerpc/sysdev/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@ obj-$(CONFIG_U3_DART) += dart_iommu.o
		obj-$(CONFIG_MMIO_NVRAM) += mmio_nvram.o
		obj-$(CONFIG_FSL_SOC) += fsl_soc.o
		obj-$(CONFIG_FSL_PCI) += fsl_pci.o $(fsl-msi-obj-y)
		obj-$(CONFIG_FSL_PMC) += fsl_pmc.o
		obj-$(CONFIG_FSL_LBC) += fsl_lbc.o
		obj-$(CONFIG_FSL_GTM) += fsl_gtm.o
		obj-$(CONFIG_MPC8xxx_GPIO) += mpc8xxx_gpio.o

arch/powerpc/sysdev/fsl_pmc.c

0 → 100644

+88 −0

Original line number	Diff line number	Diff line
		/*
		* Suspend/resume support
		*
		* Copyright 2009 MontaVista Software, Inc.
		*
		* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*/

		#include <linux/init.h>
		#include <linux/types.h>
		#include <linux/errno.h>
		#include <linux/suspend.h>
		#include <linux/delay.h>
		#include <linux/device.h>
		#include <linux/of_platform.h>

		struct pmc_regs {
		__be32 devdisr;
		__be32 devdisr2;
		__be32 :32;
		__be32 :32;
		__be32 pmcsr;
		#define PMCSR_SLP (1 << 17)
		};

		static struct device *pmc_dev;
		static struct pmc_regs __iomem *pmc_regs;

		static int pmc_suspend_enter(suspend_state_t state)
		{
		int ret;

		setbits32(&pmc_regs->pmcsr, PMCSR_SLP);
		/* At this point, the CPU is asleep. */

		/* Upon resume, wait for SLP bit to be clear. */
		ret = spin_event_timeout((in_be32(&pmc_regs->pmcsr) & PMCSR_SLP) == 0,
		10000, 10) ? 0 : -ETIMEDOUT;
		if (ret)
		dev_err(pmc_dev, "tired waiting for SLP bit to clear\n");
		return ret;
		}

		static int pmc_suspend_valid(suspend_state_t state)
		{
		if (state != PM_SUSPEND_STANDBY)
		return 0;
		return 1;
		}

		static struct platform_suspend_ops pmc_suspend_ops = {
		.valid = pmc_suspend_valid,
		.enter = pmc_suspend_enter,
		};

		static int pmc_probe(struct of_device ofdev, const struct of_device_id id)
		{
		pmc_regs = of_iomap(ofdev->node, 0);
		if (!pmc_regs)
		return -ENOMEM;

		pmc_dev = &ofdev->dev;
		suspend_set_ops(&pmc_suspend_ops);
		return 0;
		}

		static const struct of_device_id pmc_ids[] = {
		{ .compatible = "fsl,mpc8548-pmc", },
		{ .compatible = "fsl,mpc8641d-pmc", },
		{ },
		};

		static struct of_platform_driver pmc_driver = {
		.driver.name = "fsl-pmc",
		.match_table = pmc_ids,
		.probe = pmc_probe,
		};

		static int __init pmc_init(void)
		{
		return of_register_platform_driver(&pmc_driver);
		}
		device_initcall(pmc_init);

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