[PATCH 4.14 20/21] ARM: dts: r8a7791: Correct critical CPU temperature

Greg Kroah-Hartman
2018-11-21T19:07:04Z

From: Chris Paterson <chris.paterson2@renesas.com>

commit e4fdf59bcce3b490bbc7197145bcb9f9d5a18cd3 upstream.

The R-Car M2W hardware manual states that Tc = –40°C to +105°C. The
thermal sensor has an accuracy of ±5°C and there can be a temperature
difference of 1 or 2 degrees between Tjmax and the thermal sensor due
to the location of the latter.

This means that 95°C is a safer value to use.

Fixes: cac68a56e34b9810 ("ARM: dts: r8a7791: enable to use thermal-zone")
Signed-off-by: Chris Paterson <chris.paterson2@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/arm/boot/dts/r8a7791.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/boot/dts/r8a7791.dtsi
+++ b/arch/arm/boot/dts/r8a7791.dtsi
@@ -91,7 +91,7 @@

trips {
cpu-crit {
- temperature = <115000>;
+ temperature = <95000>;
hysteresis = <0>;
type = "critical";
};