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

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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: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
kuninori.morimoto.gx@renesas.com 2012-12-02 18:48:41 -08:00 committed by Zhang Rui
parent bbf63be4f3
commit d2a73e225d
1 changed files with 65 additions and 3 deletions
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68
drivers/thermal/rcar_thermal.c
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@ -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_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);