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Commit dd9f1486 authored by Jun Nie's avatar Jun Nie Committed by Sebastian Reichel
Browse files

power/reset: zx: Register restart handler 



Register with kernel restart handler instead of setting arm_pm_restart
directly.

Signed-off-by: default avatarJun Nie <jun.nie@linaro.org>
Signed-off-by: default avatarSebastian Reichel <sre@kernel.org>
parent 377b641a

drivers/power/reset/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -166,5 +166,12 @@ config POWER_RESET_RMOBILE 
	help

	  Reboot support for Renesas R-Mobile and SH-Mobile SoCs.



config POWER_RESET_ZX

	tristate "ZTE SoCs reset driver"

	depends on ARCH_ZX || COMPILE_TEST

	depends on HAS_IOMEM

	help

	  Reboot support for ZTE SoCs.



endif

drivers/power/reset/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -19,3 +19,4 @@ obj-$(CONFIG_POWER_RESET_KEYSTONE) += keystone-reset.o 
obj-$(CONFIG_POWER_RESET_SYSCON) += syscon-reboot.o

obj-$(CONFIG_POWER_RESET_SYSCON_POWEROFF) += syscon-poweroff.o

obj-$(CONFIG_POWER_RESET_RMOBILE) += rmobile-reset.o

obj-$(CONFIG_POWER_RESET_ZX) += zx-reboot.o

drivers/power/reset/zx-reboot.c

0 → 100644
+82 −0
Original line number Diff line number Diff line 
/*

 * ZTE zx296702 SoC reset code

 *

 * Copyright (c) 2015 Linaro Ltd.

 *

 * Author: Jun Nie <jun.nie@linaro.org>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



#include <linux/delay.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/notifier.h>

#include <linux/of_address.h>

#include <linux/platform_device.h>

#include <linux/reboot.h>



#include <asm/proc-fns.h>



static void __iomem *base;

static void __iomem *pcu_base;



static int zx_restart_handler(struct notifier_block *this,

			      unsigned long mode, void *cmd)

{

	writel_relaxed(1, base + 0xb0);

	writel_relaxed(1, pcu_base + 0x34);



	mdelay(50);

	pr_emerg("Unable to restart system\n");



	return NOTIFY_DONE;

}



static struct notifier_block zx_restart_nb = {

	.notifier_call = zx_restart_handler,

	.priority = 128,

};



static int zx_reboot_probe(struct platform_device *pdev)

{

	struct device_node *np = pdev->dev.of_node;

	int err;



	base = of_iomap(np, 0);

	if (!base) {

		WARN(1, "failed to map base address");

		return -ENODEV;

	}



	np = of_find_compatible_node(NULL, NULL, "zte,zx296702-pcu");

	pcu_base = of_iomap(np, 0);

	if (!pcu_base) {

		iounmap(base);

		WARN(1, "failed to map pcu_base address");

		return -ENODEV;

	}



	err = register_restart_handler(&zx_restart_nb);

	if (err)

		dev_err(&pdev->dev, "Register restart handler failed(err=%d)\n",

			err);



	return err;

}



static const struct of_device_id zx_reboot_of_match[] = {

	{ .compatible = "zte,sysctrl" },

	{}

};



static struct platform_driver zx_reboot_driver = {

	.probe = zx_reboot_probe,

	.driver = {

		.name = "zx-reboot",

		.of_match_table = zx_reboot_of_match,

	},

};

module_platform_driver(zx_reboot_driver);