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authorNiklas Söderlund <niklas.soderlund+renesas@ragnatech.se>2020-02-12 23:49:17 +0100
committerDaniel Lezcano <daniel.lezcano@linaro.org>2020-03-12 11:40:57 +0100
commit267c4d8d132c8646fc90a58d40e3117656a4e9b5 (patch)
treec2e5d9de298a0cb3962d8628280d74d60eccde06 /drivers/thermal
parentd543c8424c116549c4322ff0341e388452aca0ea (diff)
thermal: rcar_gen3_thermal: Generate interrupt when temperature changes
The desired behavior of the driver is to generate an interrupt and call thermal_zone_device_update() as soon as the temperature have changed more then one degree. When the set_trips operation was implemented it was believed that the trip window set by the framework would move around the current temperature and the hysteresis value described in devicetree. The behavior of the framework is however to set a window based on the trip points described in devicetree. Remove the set_trips operation which was not used correctly and update the temperatures that triggers interrupts directly from the interrupt handler. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200212224917.737314-1-niklas.soderlund+renesas@ragnatech.se
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/rcar_gen3_thermal.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c
index e877c90c5c8b..a2bf9d8074cc 100644
--- a/drivers/thermal/rcar_gen3_thermal.c
+++ b/drivers/thermal/rcar_gen3_thermal.c
@@ -81,8 +81,6 @@ struct rcar_gen3_thermal_tsc {
void __iomem *base;
struct thermal_zone_device *zone;
struct equation_coefs coef;
- int low;
- int high;
int tj_t;
int id; /* thermal channel id */
};
@@ -204,12 +202,14 @@ static int rcar_gen3_thermal_mcelsius_to_temp(struct rcar_gen3_thermal_tsc *tsc,
return INT_FIXPT(val);
}
-static int rcar_gen3_thermal_set_trips(void *devdata, int low, int high)
+static int rcar_gen3_thermal_update_range(struct rcar_gen3_thermal_tsc *tsc)
{
- struct rcar_gen3_thermal_tsc *tsc = devdata;
+ int temperature, low, high;
+
+ rcar_gen3_thermal_get_temp(tsc, &temperature);
- low = clamp_val(low, -40000, 120000);
- high = clamp_val(high, -40000, 120000);
+ low = temperature - MCELSIUS(1);
+ high = temperature + MCELSIUS(1);
rcar_gen3_thermal_write(tsc, REG_GEN3_IRQTEMP1,
rcar_gen3_thermal_mcelsius_to_temp(tsc, low));
@@ -217,15 +217,11 @@ static int rcar_gen3_thermal_set_trips(void *devdata, int low, int high)
rcar_gen3_thermal_write(tsc, REG_GEN3_IRQTEMP2,
rcar_gen3_thermal_mcelsius_to_temp(tsc, high));
- tsc->low = low;
- tsc->high = high;
-
return 0;
}
static const struct thermal_zone_of_device_ops rcar_gen3_tz_of_ops = {
.get_temp = rcar_gen3_thermal_get_temp,
- .set_trips = rcar_gen3_thermal_set_trips,
};
static void rcar_thermal_irq_set(struct rcar_gen3_thermal_priv *priv, bool on)
@@ -246,9 +242,11 @@ static irqreturn_t rcar_gen3_thermal_irq(int irq, void *data)
for (i = 0; i < priv->num_tscs; i++) {
status = rcar_gen3_thermal_read(priv->tscs[i], REG_GEN3_IRQSTR);
rcar_gen3_thermal_write(priv->tscs[i], REG_GEN3_IRQSTR, 0);
- if (status)
+ if (status) {
+ rcar_gen3_thermal_update_range(priv->tscs[i]);
thermal_zone_device_update(priv->tscs[i]->zone,
THERMAL_EVENT_UNSPECIFIED);
+ }
}
return IRQ_HANDLED;
@@ -453,6 +451,8 @@ static int rcar_gen3_thermal_probe(struct platform_device *pdev)
if (ret < 0)
goto error_unregister;
+ rcar_gen3_thermal_update_range(tsc);
+
dev_info(dev, "TSC%d: Loaded %d trip points\n", i, ret);
}
@@ -491,7 +491,7 @@ static int __maybe_unused rcar_gen3_thermal_resume(struct device *dev)
struct rcar_gen3_thermal_tsc *tsc = priv->tscs[i];
priv->thermal_init(tsc);
- rcar_gen3_thermal_set_trips(tsc, tsc->low, tsc->high);
+ rcar_gen3_thermal_update_range(tsc);
}
rcar_thermal_irq_set(priv, true);