diff mbox

[3/4] ARM: shmobile: r8a7790: enable to use thermal-zone

Message ID 87wpsugazs.wl%kuninori.morimoto.gx@renesas.com (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Kuninori Morimoto Dec. 4, 2015, 3:18 a.m. UTC 
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

This patch enables to use thermal-zone on r8a7790.
This thermal sensor can measure temperature from -40000 to 125000,
but over 117000 can be critical on this chip.
Thus, default critical temperature is now set as 115000 (this driver
is using 5000 steps) (Current critical temperature is using it as
90000, but there is no big reason about it)

And it doesn't check thermal zone periodically (same as current
behavior). You can exchange it by modifing polling-delay[-passive]
property.

You can set trip temp if your kernel has CONFIG_THERMAL_WRITABLE_TRIPS,
but you need to take care to use it, since it will call
orderly_poweroff() it it reached to the value.
echo $temp > /sys/class/thermal/thermal_zone0/trip_point_0_temp

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 arch/arm/boot/dts/r8a7790.dtsi | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

Comments

Simon Horman Dec. 7, 2015, 6:34 a.m. UTC | #1 
On Fri, Dec 04, 2015 at 03:18:11AM +0000, Kuninori Morimoto wrote:
> 
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> 
> This patch enables to use thermal-zone on r8a7790.
> This thermal sensor can measure temperature from -40000 to 125000,
> but over 117000 can be critical on this chip.
> Thus, default critical temperature is now set as 115000 (this driver
> is using 5000 steps) (Current critical temperature is using it as
> 90000, but there is no big reason about it)
> 
> And it doesn't check thermal zone periodically (same as current
> behavior). You can exchange it by modifing polling-delay[-passive]
> property.
> 
> You can set trip temp if your kernel has CONFIG_THERMAL_WRITABLE_TRIPS,
> but you need to take care to use it, since it will call
> orderly_poweroff() it it reached to the value.
> echo $temp > /sys/class/thermal/thermal_zone0/trip_point_0_temp
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

I have marked this and the following shmobile patch as deffered
pending acceptance of the driver changes (earlier in the patchset).
Please repost the shmobile patches once that has occurred.
--
To unsubscribe from this list: send the line "unsubscribe linux-pm" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index 6cfd0dc..bbbc3cd 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -112,6 +112,25 @@ 
 		};
 	};
 
+	thermal-zones {
+		cpu_thermal: cpu-thermal {
+			polling-delay-passive	= <0>;
+			polling-delay		= <0>;
+
+			thermal-sensors = <&thermal>;
+
+			trips {
+				cpu-crit {
+					temperature	= <1150000>;
+					hysteresis	= <0>;
+					type		= "critical";
+				};
+			};
+			cooling-maps {
+			};
+		};
+	};
+
 	gic: interrupt-controller@f1001000 {
 		compatible = "arm,gic-400";
 		#interrupt-cells = <3>;
@@ -202,12 +221,15 @@ 
 		power-domains = <&cpg_clocks>;
 	};
 
-	thermal@e61f0000 {
-		compatible = "renesas,thermal-r8a7790", "renesas,rcar-thermal";
+	thermal: thermal@e61f0000 {
+		compatible =	"renesas,thermal-r8a7790",
+				"renesas,rcar-thermal-gen2",
+				"renesas,rcar-thermal";
 		reg = <0 0xe61f0000 0 0x14>, <0 0xe61f0100 0 0x38>;
 		interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp5_clks R8A7790_CLK_THERMAL>;
 		power-domains = <&cpg_clocks>;
+		#thermal-sensor-cells = <0>;
 	};
 
 	timer {