Patchwork [7/9] arm: dts: add omap4430 thermal data

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Submitter Eduardo Valentin
Date July 17, 2013, 3:02 p.m.
Message ID <1374073374-30946-15-git-send-email-eduardo.valentin@ti.com>
Download mbox | patch
Permalink /patch/259702/
State New
Headers show

Comments

Eduardo Valentin - July 17, 2013, 3:02 p.m.
This patch changes the dtsi entry on omap4430 to contain
the thermal data. This data will enable the passive
cooling with CPUfreq cooling device at 100C and the
system will do a thermal shutdown at 125C.

Cc: "BenoƮt Cousson" <b-cousson@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-omap@vger.kernel.org
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
---
 arch/arm/boot/dts/omap443x.dtsi | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

Patch

diff --git a/arch/arm/boot/dts/omap443x.dtsi b/arch/arm/boot/dts/omap443x.dtsi
index 4a4dcc3..27f0e0f 100644
--- a/arch/arm/boot/dts/omap443x.dtsi
+++ b/arch/arm/boot/dts/omap443x.dtsi
@@ -8,6 +8,7 @@ 
  * kind, whether express or implied.
  */
 
+#include <dt-bindings/thermal/thermal.h>
 #include "omap4.dtsi"
 
 / {
@@ -27,8 +28,34 @@ 
 	};
 
 	bandgap {
-		reg = <0x4a002260 0x4
-		       0x4a00232C 0x4>;
+		reg = <0x4a002260 0x4 0x4a00232C 0x4>;
 		compatible = "ti,omap4430-bandgap";
+		thermal_zone {
+			type = "CPU";
+			mask = <0x03>; /* trips writability */
+			passive_delay = <250>; /* milliseconds */
+			polling_delay = <1000>; /* milliseconds */
+			governor = "step_wise";
+			trips {
+				alert@100000{
+					temperature = <100000>; /* milliCelsius */
+					hysteresis = <2000>; /* milliCelsius */
+					type = <THERMAL_TRIP_PASSIVE>;
+				};
+				crit@125000{
+					temperature = <125000>; /* milliCelsius */
+					hysteresis = <2000>; /* milliCelsius */
+					type = <THERMAL_TRIP_CRITICAL>;
+				};
+			};
+			bind_params {
+				action@0{
+					cooling_device = "thermal-cpufreq";
+					weight = <100>; /* percentage */
+					mask = <0x01>;
+					/* no limits, using defaults */
+				};
+			};
+		};
 	};
 };