Message-ID: <874mfkqzok.wl%kuninori.morimoto.gx@renesas.com>
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Subject: [PATCH 6/8 v5] ARM: shmobile: r8a7790: enable to use thermal-zone
User-Agent: Wanderlust/2.15.9 Emacs/24.3 Mule/6.0
MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue")
To: Simon <horms@verge.net.au>, Zhang Rui <rui.zhang@intel.com>,
        Eduardo Valentin <edubezval@gmail.com>
CC: Geert Uytterhoeven <geert@linux-m68k.org>, Magnus <magnus.damm@gmail.com>,
        <linux-sh@vger.kernel.org>, <linux-pm@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
In-Reply-To: <87d1u8qzsy.wl%kuninori.morimoto.gx@renesas.com>
References: <87d1u8qzsy.wl%kuninori.morimoto.gx@renesas.com>
Content-Type: text/plain; charset="US-ASCII"
Date: Tue, 15 Dec 2015 01:18:59 +0000
SpamDiagnosticOutput: 1:23
SpamDiagnosticMetadata: NSPM
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Dec 2015 01:18:59.3127 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-Transport-CrossTenantHeadersStamped: HK2PR06MB1011
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 2390
Lines: 84


From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

This patch enables to use thermal-zone on r8a7790.
This thermal sensor can measure temperature from -40000 to 125000,
but over 117000 can be critical on this chip.
Thus, default critical temperature is now set as 115000 (this driver
is using 5000 steps) (Current critical temperature is using it as
90000, but there is no big reason about it)

And it doesn't check thermal zone periodically (same as current
behavior). You can exchange it by modifying polling-delay[-passive]
property.

You can set trip temp if your kernel has CONFIG_THERMAL_WRITABLE_TRIPS,
but you need to take care to use it, since it will call
orderly_poweroff() it it reaches to the value.
echo $temp > /sys/class/thermal/thermal_zone0/trip_point_0_temp

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
v4 -> v5

 - no change

 arch/arm/boot/dts/r8a7790.dtsi | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index 9f3036b..2203b97 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -112,6 +112,25 @@
 		};
 	};
 
+	thermal-zones {
+		cpu_thermal: cpu-thermal {
+			polling-delay-passive	= <0>;
+			polling-delay		= <0>;
+
+			thermal-sensors = <&thermal>;
+
+			trips {
+				cpu-crit {
+					temperature	= <115000>;
+					hysteresis	= <0>;
+					type		= "critical";
+				};
+			};
+			cooling-maps {
+			};
+		};
+	};
+
 	gic: interrupt-controller@f1001000 {
 		compatible = "arm,gic-400";
 		#interrupt-cells = <3>;
@@ -202,12 +221,15 @@
 		power-domains = <&cpg_clocks>;
 	};
 
-	thermal@e61f0000 {
-		compatible = "renesas,thermal-r8a7790", "renesas,rcar-thermal";
+	thermal: thermal@e61f0000 {
+		compatible =	"renesas,thermal-r8a7790",
+				"renesas,rcar-gen2-thermal",
+				"renesas,rcar-thermal";
 		reg = <0 0xe61f0000 0 0x14>, <0 0xe61f0100 0 0x38>;
 		interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp5_clks R8A7790_CLK_THERMAL>;
 		power-domains = <&cpg_clocks>;
+		#thermal-sensor-cells = <0>;
 	};
 
 	timer {
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/