Aquaris-M10-4G/drivers/misc/mediatek/thermal/common/coolers/mtk_cooler_sysrst.c

#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/thermal.h>
#include <linux/platform_device.h>
#include <mt-plat/aee.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include "mt-plat/mtk_thermal_monitor.h"
#include "mtk_thermal_typedefs.h"
#include "mach/mt_thermal.h"
#include <mach/mt_clkmgr.h>
#include <mt_ptp.h>
#include <mach/wd_api.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <tscpu_settings.h>

/*=============================================================
 *Local variable definition
 *=============================================================*/
static unsigned int cl_dev_sysrst_state;
static struct thermal_cooling_device *cl_dev_sysrst;
/*=============================================================*/

/*
 * cooling device callback functions (tscpu_cooling_sysrst_ops)
 * 1 : ON and 0 : OFF
 */
static int sysrst_cpu_get_max_state(struct thermal_cooling_device *cdev, unsigned long *state)
{
	/* tscpu_dprintk("sysrst_cpu_get_max_state\n"); */
	*state = 1;
	return 0;
}

static int sysrst_cpu_get_cur_state(struct thermal_cooling_device *cdev, unsigned long *state)
{
	/* tscpu_dprintk("sysrst_cpu_get_cur_state\n"); */
	*state = cl_dev_sysrst_state;
	return 0;
}

static int sysrst_cpu_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
{
	cl_dev_sysrst_state = state;

	if (cl_dev_sysrst_state == 1) {
		tscpu_printk("sysrst_cpu_set_cur_state = 1\n");
		tscpu_printk("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");
		tscpu_printk("*****************************************\n");
		tscpu_printk("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\n");

#ifndef CONFIG_ARM64
		BUG();
#else
		*(unsigned int *)0x0 = 0xdead;	/* To trigger data abort to reset the system for thermal protection. */
#endif

	}
	return 0;
}

static struct thermal_cooling_device_ops mtktscpu_cooling_sysrst_ops = {
	.get_max_state = sysrst_cpu_get_max_state,
	.get_cur_state = sysrst_cpu_get_cur_state,
	.set_cur_state = sysrst_cpu_set_cur_state,
};

static int __init mtk_cooler_sysrst_init(void)
{
	int err = 0;
	tscpu_dprintk("mtk_cooler_sysrst_init: Start\n");
	cl_dev_sysrst = mtk_thermal_cooling_device_register("mtktscpu-sysrst", NULL,
							    &mtktscpu_cooling_sysrst_ops);
	if (err) {
		tscpu_printk("tscpu_register_DVFS_hotplug_cooler fail\n");
		return err;
	}
	tscpu_dprintk("mtk_cooler_sysrst_init: End\n");
	return 0;
}

static void __exit mtk_cooler_sysrst_exit(void)
{
	tscpu_dprintk("mtk_cooler_sysrst_exit\n");
	if (cl_dev_sysrst) {
		mtk_thermal_cooling_device_unregister(cl_dev_sysrst);
		cl_dev_sysrst = NULL;
	}
}
module_init(mtk_cooler_sysrst_init);
module_exit(mtk_cooler_sysrst_exit);