From: Chris Paterson <chris.paterson2-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
To: Kuninori Morimoto
<kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
Simon Horman <horms-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org>
Cc: Magnus Damm <magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-renesas-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Chris Paterson
<chris.paterson2-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
Subject: [PATCH 2/3] ARM: dts: r8a7791: Correct critical CPU temperature
Date: Thu, 14 Dec 2017 09:08:40 +0000 [thread overview]
Message-ID: <1513242521-11236-3-git-send-email-chris.paterson2@renesas.com> (raw)
In-Reply-To: <1513242521-11236-1-git-send-email-chris.paterson2-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
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-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
arch/arm/boot/dts/r8a7791.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
index dfc1c406179fbf3a..008a260f86a565c6 100644
--- a/arch/arm/boot/dts/r8a7791.dtsi
+++ b/arch/arm/boot/dts/r8a7791.dtsi
@@ -92,7 +92,7 @@
trips {
cpu-crit {
- temperature = <115000>;
+ temperature = <95000>;
hysteresis = <0>;
type = "critical";
};
--
1.9.1
--
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next prev parent reply other threads:[~2017-12-14 9:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-14 9:08 [PATCH 0/3] Correct R-Car Gen2 critical CPU temperature Chris Paterson
[not found] ` <1513242521-11236-1-git-send-email-chris.paterson2-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
2017-12-14 9:08 ` [PATCH 1/3] ARM: dts: r8a7790: Correct " Chris Paterson
2017-12-14 10:23 ` Geert Uytterhoeven
2017-12-14 9:08 ` Chris Paterson [this message]
2017-12-14 10:24 ` [PATCH 2/3] ARM: dts: r8a7791: " Geert Uytterhoeven
2017-12-14 9:08 ` [PATCH 3/3] ARM: dts: r8a7793: " Chris Paterson
2017-12-14 10:25 ` Geert Uytterhoeven
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