devicetree: add lm90 thermal_zone sensor support

This patch updates the LM90's devicetree definition to
include the #thermal-sensor-cells property as well as
the sensor constants in include/dt-bindings/thermal/lm90.h.

Cc: Wei Ni <wni@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/Documentation/devicetree/bindings/hwmon/lm90.txt b/Documentation/devicetree/bindings/hwmon/lm90.txt
index e863248..9758126 100644 (file)
--- a/Documentation/devicetree/bindings/hwmon/lm90.txt
+++ b/Documentation/devicetree/bindings/hwmon/lm90.txt
@@ -33,6 +33,11 @@ Optional properties:
               LM90 "-ALERT" pin output.
               See interrupt-controller/interrupts.txt for the format.
 
+- #thermal-sensor-cells: should be set to 1. See thermal/thermal.txt for
+             details. See <include/dt-bindings/thermal/lm90.h> for the
+             definition of the local, remote and 2nd remote sensor index
+             constants.
+
 Example LM90 node:
 
 temp-sensor {
@@ -41,4 +46,5 @@ temp-sensor {
        vcc-supply = <&palmas_ldo6_reg>;
        interrupt-parent = <&gpio>;
        interrupts = <TEGRA_GPIO(O, 4) IRQ_TYPE_LEVEL_LOW>;
+       #thermal-sensor-cells = <1>;
 }

diff --git a/MAINTAINERS b/MAINTAINERS
index cfff2c9..ad5bfb4 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7527,6 +7527,7 @@ S:        Maintained
 F:     Documentation/hwmon/lm90
 F:     Documentation/devicetree/bindings/hwmon/lm90.txt
 F:     drivers/hwmon/lm90.c
+F:     include/dt-bindings/thermal/lm90.h
 
 LM95234 HARDWARE MONITOR DRIVER
 M:     Guenter Roeck <linux@roeck-us.net>

diff --git a/include/dt-bindings/thermal/lm90.h b/include/dt-bindings/thermal/lm90.h
new file mode 100644 (file)
index 0000000..8c2e309
--- /dev/null
+++ b/include/dt-bindings/thermal/lm90.h
@@ -0,0 +1,12 @@
+/*
+ * This header provides constants for the LM90 thermal bindings.
+ */
+
+#ifndef _DT_BINDINGS_THERMAL_LM90_H_
+#define _DT_BINDINGS_THERMAL_LM90_H_
+
+#define LM90_LOCAL_TEMPERATURE 0
+#define LM90_REMOTE_TEMPERATURE 1
+#define LM90_REMOTE2_TEMPERATURE 2
+
+#endif