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[PATCHv4,10/18] arm: dts: add omap4 CPU thermal data

Message ID 1380251605-3804-11-git-send-email-eduardo.valentin@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Eduardo Valentin Sept. 27, 2013, 3:13 a.m. UTC 
This patch changes a dtsi file to contain the thermal data
for MPU domain on OMAP4 and later SoCs. This data will
enable the passive cooling with CPUfreq cooling device
at 100C and the system will do a thermal shutdown at 125C.

This thermal data can be reused across TI SoC devices.

Cc: "Benoît Cousson" <bcousson@baylibre.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-omap@vger.kernel.org
Cc: devicetree@vger.kernel.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/omap4-cpu-thermal.dtsi | 41 ++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 arch/arm/boot/dts/omap4-cpu-thermal.dtsi
diff mbox

Patch

diff --git a/arch/arm/boot/dts/omap4-cpu-thermal.dtsi b/arch/arm/boot/dts/omap4-cpu-thermal.dtsi
new file mode 100644
index 0000000..65a6deb
--- /dev/null
+++ b/arch/arm/boot/dts/omap4-cpu-thermal.dtsi
@@ -0,0 +1,41 @@ 
+/*
+ * Device Tree Source for OMAP4/5 SoC CPU thermal
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
+ * Contact: Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <dt-bindings/thermal/thermal.h>
+
+cpu_thermal: cpu_thermal {
+	polling-delay-passive = <250>; /* milliseconds */
+	polling-delay = <1000>; /* milliseconds */
+
+			/* sensor       ID */
+        thermal-sensors = <&bandgap     0>;
+
+        trips {
+                cpu_alert0: cpu_alert {
+                        temperature = <100000>; /* millicelsius */
+                        hysteresis = <2000>; /* millicelsius */
+                        type = THERMAL_TRIP_PASSIVE;
+                };
+                cpu_crit: cpu_crit {
+                        temperature = <125000>; /* millicelsius */
+                        hysteresis = <2000>; /* millicelsius */
+                        type = THERMAL_TRIP_CRITICAL;
+                };
+        };
+
+	cooling-maps {
+		map0 {
+			trip = <&cpu_alert0>;
+			cooling-device =
+				<&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};