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authorEduardo Valentin <eduardo.valentin@ti.com>2013-07-03 15:35:39 -0400
committerEduardo Valentin <eduardo.valentin@ti.com>2013-12-04 09:31:34 -0400
commit4e5e4705bf69ea450f58fc709ac5888f321a9299 (patch)
tree523e7c5a3f5459acdd5b81d81b0deeb68de79dc0 /include/dt-bindings/thermal
parent81bd4e1cebed5efb85bd94a15342ee4d6965a416 (diff)
thermal: introduce device tree parser
This patch introduces a device tree bindings for describing the hardware thermal behavior and limits. Also a parser to read and interpret the data and feed it in the thermal framework is presented. This patch introduces a thermal data parser for device tree. The parsed data is used to build thermal zones and thermal binding parameters. The output data can then be used to deploy thermal policies. This patch adds also documentation regarding this API and how to define tree nodes to use this infrastructure. Note that, in order to be able to have control on the sensor registration on the DT thermal zone, it was required to allow changing the thermal zone .get_temp callback. For this reason, this patch also removes the 'const' modifier from the .ops field of thermal zone devices. Cc: Zhang Rui <rui.zhang@intel.com> Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Diffstat (limited to 'include/dt-bindings/thermal')
-rw-r--r--include/dt-bindings/thermal/thermal.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/dt-bindings/thermal/thermal.h b/include/dt-bindings/thermal/thermal.h
new file mode 100644
index 000000000000..59822a995858
--- /dev/null
+++ b/include/dt-bindings/thermal/thermal.h
@@ -0,0 +1,17 @@
+/*
+ * This header provides constants for most thermal bindings.
+ *
+ * Copyright (C) 2013 Texas Instruments
+ * Eduardo Valentin <eduardo.valentin@ti.com>
+ *
+ * GPLv2 only
+ */
+
+#ifndef _DT_BINDINGS_THERMAL_THERMAL_H
+#define _DT_BINDINGS_THERMAL_THERMAL_H
+
+/* On cooling devices upper and lower limits */
+#define THERMAL_NO_LIMIT (-1UL)
+
+#endif
+

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