Merge "ARM: dts: msm: add wdog for SA8155 VM"

MSM VM Restart Driver

A restart driver to trigger memdump on msm virtual machine.

Required Properties:

-compatible: "qcom,vm-restart"

Example:

	vm_restart: restart {

		compatible = "qcom,vm-restart";

		status = "ok";

	};

		qca,bt-reset-gpio = <&tlmm 172 0>; /* BT_EN */

		status = "ok";

	};

	wdog: qcom,wdt@17c10000{

		compatible = "qcom,msm-watchdog";

		reg = <0x17c10000 0x1000>;

		reg-names = "wdt-base";

		interrupts = <0 0 0>, <0 1 0>;

		qcom,bark-time = <11000>;

		qcom,pet-time = <9360>;

		qcom,ipi-ping;

		qcom,wakeup-enable;

		qcom,scandump-sizes = <0x10100 0x10100 0x10100 0x10100

		0x18100 0x18100 0x18100 0x18100>;

	};

	vm_restart: restart {

		compatible = "qcom,vm-restart";

		status = "ok";

	};

};

#include "sm8150-pinctrl.dtsi"

	  Say Y here if you have a Qualcomm Tecnologies, Inc. board and wish to

	  enable restart driver.

config POWER_RESET_QCOM_VM

	bool "Qualcomm Technologies, Inc. MSM VM power-off driver"

	depends on QTI_GVM

	help

	  Power off and restart support for Qualcomm Technologies, Inc. virtual

	  machine. This driver supports virtual machine power down and restart.

	  Say Y here if you have a MSM virtual machine and wish to enable

	  restart driver.

config QCOM_DLOAD_MODE

	bool "Qualcomm Technologies, Inc. download mode"

	depends on POWER_RESET_QCOM

obj-$(CONFIG_POWER_RESET_IMX) += imx-snvs-poweroff.o

obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o

obj-$(CONFIG_POWER_RESET_QCOM) += msm-poweroff.o

obj-$(CONFIG_POWER_RESET_QCOM_VM) += msm-vm-poweroff.o

obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o

obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o

obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o

/* Copyright (c) 2019, The Linux Foundation. All rights reserved.

 *

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

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

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

#include <linux/io.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/module.h>

#include <linux/reboot.h>

#include <linux/pm.h>

#include <linux/delay.h>

#include <linux/of_address.h>

#include <asm/system_misc.h>

#include <soc/qcom/watchdog.h>

static int in_panic;

static void (*old_pm_restart)(enum reboot_mode reboot_mode, const char *cmd);

static int panic_prep_restart(struct notifier_block *this,

			      unsigned long event, void *ptr)

{

	in_panic = 1;

	return NOTIFY_DONE;

}

static struct notifier_block panic_blk = {

	.notifier_call	= panic_prep_restart,

};

static void do_vm_restart(enum reboot_mode reboot_mode, const char *cmd)

{

	pr_notice("Going down for vm restart now\n");

	if (in_panic)

		msm_trigger_wdog_bite();

	if (old_pm_restart)

		old_pm_restart(reboot_mode, cmd);

}

static int vm_restart_probe(struct platform_device *pdev)

{

	atomic_notifier_chain_register(&panic_notifier_list, &panic_blk);

	old_pm_restart = arm_pm_restart;

	arm_pm_restart = do_vm_restart;

	return 0;

}

static const struct of_device_id of_vm_restart_match[] = {

	{ .compatible = "qcom,vm-restart", },

	{},

};

MODULE_DEVICE_TABLE(of, of_vm_restart_match);

static struct platform_driver vm_restart_driver = {

	.probe = vm_restart_probe,

	.driver = {

		.name = "msm-vm-restart",

		.of_match_table = of_match_ptr(of_vm_restart_match),

	},

};

static int __init vm_restart_init(void)

{

	return platform_driver_register(&vm_restart_driver);

}

pure_initcall(vm_restart_init);