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Commit d2a73e22 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Zhang Rui
Browse files

thermal: rcar: add .get_trip_type/temp and .notify support 



This patch adds .get_trip_type(), .get_trip_temp(), and .notify()
on rcar_thermal_zone_ops.
Driver will try platform power OFF if it reached to
critical temperature.

Signed-off-by: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
parent bbf63be4

drivers/thermal/rcar_thermal.c

+65 −3
Original line number Diff line number Diff line
@@ -22,10 +22,13 @@ 
#include <linux/io.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/reboot.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

#include <linux/thermal.h>



#define IDLE_INTERVAL	5000



#define THSCR	0x2c

#define THSSR	0x30
@@ -176,8 +179,66 @@ static int rcar_thermal_get_temp(struct thermal_zone_device *zone, 
	return 0;

}



static int rcar_thermal_get_trip_type(struct thermal_zone_device *zone,

				      int trip, enum thermal_trip_type *type)

{

	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);



	/* see rcar_thermal_get_temp() */

	switch (trip) {

	case 0: /* +90 <= temp */

		*type = THERMAL_TRIP_CRITICAL;

		break;

	default:

		dev_err(priv->dev, "rcar driver trip error\n");

		return -EINVAL;

	}



	return 0;

}



static int rcar_thermal_get_trip_temp(struct thermal_zone_device *zone,

				      int trip, unsigned long *temp)

{

	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);



	/* see rcar_thermal_get_temp() */

	switch (trip) {

	case 0: /* +90 <= temp */

		*temp = MCELSIUS(90);

		break;

	default:

		dev_err(priv->dev, "rcar driver trip error\n");

		return -EINVAL;

	}



	return 0;

}



static int rcar_thermal_notify(struct thermal_zone_device *zone,

			       int trip, enum thermal_trip_type type)

{

	struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone);



	switch (type) {

	case THERMAL_TRIP_CRITICAL:

		/* FIXME */

		dev_warn(priv->dev,

			 "Thermal reached to critical temperature\n");

		machine_power_off();

		break;

	default:

		break;

	}



	return 0;

}



static struct thermal_zone_device_ops rcar_thermal_zone_ops = {

	.get_temp	= rcar_thermal_get_temp,

	.get_trip_type	= rcar_thermal_get_trip_type,

	.get_trip_temp	= rcar_thermal_get_trip_temp,

	.notify		= rcar_thermal_notify,

};



/*
@@ -211,8 +272,9 @@ static int rcar_thermal_probe(struct platform_device *pdev) 
		return -ENOMEM;

	}



	zone = thermal_zone_device_register("rcar_thermal", 0, 0, priv,

				    &rcar_thermal_zone_ops, NULL, 0, 0);

	zone = thermal_zone_device_register("rcar_thermal", 1, 0, priv,

					    &rcar_thermal_zone_ops, NULL, 0,

					    IDLE_INTERVAL);

	if (IS_ERR(zone)) {

		dev_err(&pdev->dev, "thermal zone device is NULL\n");

		return PTR_ERR(zone);