From: Chris Paterson <chris.paterson2@renesas.com>
To: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Simon Horman <horms@verge.net.au>
Cc: Magnus Damm <magnus.damm@gmail.com>,
Russell King <linux@armlinux.org.uk>,
devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Chris Paterson <chris.paterson2@renesas.com>
Subject: [PATCH 3/3] ARM: dts: r8a7793: Correct critical CPU temperature
Date: Thu, 14 Dec 2017 09:08:41 +0000 [thread overview]
Message-ID: <1513242521-11236-4-git-send-email-chris.paterson2@renesas.com> (raw)
In-Reply-To: <1513242521-11236-1-git-send-email-chris.paterson2@renesas.com>
The R-Car M2N 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: 57f9156bc620ac56 ("ARM: dts: r8a7793: enable to use thermal-zone")
Signed-off-by: Chris Paterson <chris.paterson2@renesas.com>
---
arch/arm/boot/dts/r8a7793.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/r8a7793.dtsi b/arch/arm/boot/dts/r8a7793.dtsi
index 61dd291d907da2f5..039b225175262e4b 100644
--- a/arch/arm/boot/dts/r8a7793.dtsi
+++ b/arch/arm/boot/dts/r8a7793.dtsi
@@ -89,7 +89,7 @@
trips {
cpu-crit {
- temperature = <115000>;
+ temperature = <95000>;
hysteresis = <0>;
type = "critical";
};
--
1.9.1
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 ` [PATCH 2/3] ARM: dts: r8a7791: " Chris Paterson
2017-12-14 10:24 ` Geert Uytterhoeven
2017-12-14 9:08 ` Chris Paterson [this message]
2017-12-14 10:25 ` [PATCH 3/3] ARM: dts: r8a7793: " Geert Uytterhoeven
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