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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 1/3] ARM: dts: r8a7790: Correct critical CPU temperature
Date: Thu, 14 Dec 2017 09:08:39 +0000	[thread overview]
Message-ID: <1513242521-11236-2-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 H2 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: a8b805f3606f7af7 ("ARM: dts: r8a7790: enable to use thermal-zone")
Signed-off-by: Chris Paterson <chris.paterson2-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
 arch/arm/boot/dts/r8a7790.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index 450bfc0e9796a557..ed9a68538a554001 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -168,7 +168,7 @@
 
 			trips {
 				cpu-crit {
-					temperature	= <115000>;
+					temperature	= <95000>;
 					hysteresis	= <0>;
 					type		= "critical";
 				};
-- 
1.9.1

--
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  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   ` Chris Paterson [this message]
2017-12-14 10:23     ` [PATCH 1/3] ARM: dts: r8a7790: Correct " Geert Uytterhoeven
2017-12-14  9:08   ` [PATCH 2/3] ARM: dts: r8a7791: " Chris Paterson
2017-12-14 10:24     ` 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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