From: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
Current rcar thermal driver is using 90 degrees as trip temp, but it
should be based on each SoC / platform.
This patch enables to set trip temp via DT. (It uses db8500-thermal
style for it)
It will use 90 degrees as default trip temp if DT doesn't have it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
---
.../devicetree/bindings/thermal/rcar-thermal.txt | 2 ++
drivers/thermal/rcar_thermal.c | 34 ++++++++++++++++++++--
2 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
index 332e625..6c57f7e 100644
--- a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
+++ b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt
@@ -18,6 +18,8 @@ Required properties:
Option properties:
- interrupts : use interrupt
+- tripN-temp : temperature of trip point N. it will use 90000 as
default
+ if DT doesn't have tripN-temp
Example (non interrupt support):
diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
index 5d4ae7d..d1d0b58 100644
--- a/drivers/thermal/rcar_thermal.c
+++ b/drivers/thermal/rcar_thermal.c
@@ -63,6 +63,7 @@ struct rcar_thermal_priv {
struct mutex lock;
struct list_head list;
int id;
+ int trip_temp;
u32 ctemp;
};
@@ -222,7 +223,7 @@ static int rcar_thermal_get_trip_type(struct
thermal_zone_device *zone,
/* see rcar_thermal_get_temp() */
switch (trip) {
- case 0: /* +90 <= temp */
+ case 0:
*type = THERMAL_TRIP_CRITICAL;
break;
default:
@@ -241,8 +242,8 @@ static int rcar_thermal_get_trip_temp(struct
thermal_zone_device *zone,
/* see rcar_thermal_get_temp() */
switch (trip) {
- case 0: /* +90 <= temp */
- *temp = MCELSIUS(90);
+ case 0:
+ *temp = priv->trip_temp;
break;
default:
dev_err(dev, "rcar driver trip error\n");
@@ -361,6 +362,30 @@ static irqreturn_t rcar_thermal_irq(int irq, void *data)
/*
* platform functions
*/
+static void rcar_thermal_of_parse(struct rcar_thermal_priv *priv)
+{
+ struct device *dev = rcar_priv_to_dev(priv);
+ struct device_node *np = dev->of_node;
+ char prop_name[32];
+ s32 val;
+
+ /*
+ * let's use db8500 thermal style
+ */
+ sprintf(prop_name, "trip%d-temp", priv->id);
+ if (of_property_read_s32(np, prop_name, &val))
+ return;
+
+ if (val < -45000 ||
+ val > 125000) {
+ dev_err(dev, "unsupported trip temp, use default\n");
+ return;
+ }
+
+ /* overwrite trip temp */
+ priv->trip_temp = val;
+}
+
static int rcar_thermal_probe(struct platform_device *pdev)
{
struct rcar_thermal_common *common;
@@ -418,11 +443,14 @@ static int rcar_thermal_probe(struct platform_device
*pdev)
priv->common = common;
priv->id = i;
+ priv->trip_temp = MCELSIUS(90); /* default*/
mutex_init(&priv->lock);
INIT_LIST_HEAD(&priv->list);
INIT_DELAYED_WORK(&priv->work, rcar_thermal_work);
rcar_thermal_update_temp(priv);
+ rcar_thermal_of_parse(priv);
+
priv->zone = thermal_zone_device_register("rcar_thermal",
1, 0, priv,
&rcar_thermal_zone_ops, NULL, 0,
--
1.9.1
--
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