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From: Matthias Kaehlcke <mka@chromium.org>
To: Andy Gross <andy.gross@linaro.org>,
	David Brown <david.brown@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Zhang Rui <rui.zhang@intel.com>,
	Eduardo Valentin <edubezval@gmail.com>
Cc: linux-soc@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	linux-pm@vger.kernel.org, David Collins <collinsd@codeaurora.org>,
	Douglas Anderson <dianders@chromium.org>,
	Stephen Boyd <sboyd@kernel.org>,
	Matthias Kaehlcke <mka@chromium.org>
Subject: [PATCH v6 5/5] arm64: dts: qcom: pm8998: Add pm8998 thermal zone
Date: Tue, 31 Jul 2018 11:59:17 -0700
Message-ID: <20180731185917.176074-5-mka@chromium.org> (raw)
In-Reply-To: <20180731185917.176074-1-mka@chromium.org>

The thermal zone uses spmi-temp-alarm as sensor, the trip points
correspond to the PMIC thermal stages 1 and 2. The critical trip
point at 125°C disables the partial PMIC shutdown at stage 2.

Without an IIO input the sensor only reports a limited number of
temperatures:

- 37°C for temperatures below 105°C
- 107°C for temperatures >= 105°C and < 125°C
- 127°C for temperatures >= 125°C

(the numbers correspond to a stage 1 threshold of 105°C)

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
---
Changes in v6:
- added 'Reviewed-by: Douglas Anderson <dianders@chromium.org>' tag

Changes in v5:
- removed 'stage2-shutdown-disabled' property from spmi-temp-alarm
- updated commit message

Changes in v4:
- updated trip point temperatures to match stage 1 and 2 ones
- disabled stage 2 shutdown
- updated commit message

Changes in v3:
- moved 'thermal-zones' node to the beginning of the .dtsi

Changes in v2:
- defined 'thermal-zones' node in pm8998.dtsi instead of using a label
  to refer to it
- use 105°C hardware trip point as critical trip point
- reduced number of trip points to 2
- lowered temperature of passive trip point
- updated trip point names and added labels
- updated commit message
---
 arch/arm64/boot/dts/qcom/pm8998.dtsi | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/pm8998.dtsi b/arch/arm64/boot/dts/qcom/pm8998.dtsi
index 7eea94701b23..34c259ba3919 100644
--- a/arch/arm64/boot/dts/qcom/pm8998.dtsi
+++ b/arch/arm64/boot/dts/qcom/pm8998.dtsi
@@ -3,6 +3,31 @@
 
 #include <dt-bindings/spmi/spmi.h>
 #include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/thermal/thermal.h>
+
+/ {
+	thermal-zones {
+		pm8998 {
+			polling-delay-passive = <250>;
+			polling-delay = <1000>;
+
+			thermal-sensors = <&pm8998_temp>;
+
+			trips {
+				pm8998_alert0: pm8998-alert0 {
+					temperature = <105000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+				pm8998_crit: pm8998-crit {
+					temperature = <125000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+		};
+	};
+};
 
 &spmi_bus {
 	pm8998_lsid0: pmic@0 {
-- 
2.18.0.345.g5c9ce644c3-goog


  parent reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-31 18:59 [PATCH v6 1/5] dt-bindings: thermal: qcom-spmi-temp-alarm: Fix documentation of 'reg' Matthias Kaehlcke
2018-07-31 18:59 ` [PATCH v6 2/5] dt-bindings: thermal: qcom-spmi-temp-alarm: Improve thermal zone in example Matthias Kaehlcke
2018-07-31 19:20   ` Rob Herring
2018-07-31 18:59 ` [PATCH v6 3/5] thermal: qcom-spmi: Use PMIC thermal stage 2 for critical trip points Matthias Kaehlcke
2018-08-09 21:28   ` Doug Anderson
2018-07-31 18:59 ` [PATCH v6 4/5] arm64: dts: qcom: pm8998: Add spmi-temp-alarm node Matthias Kaehlcke
2018-07-31 18:59 ` Matthias Kaehlcke [this message]
2018-07-31 19:18 ` [PATCH v6 1/5] dt-bindings: thermal: qcom-spmi-temp-alarm: Fix documentation of 'reg' Rob Herring
2018-08-24 23:11 ` Eduardo Valentin
  -- strict thread matches above, loose matches on Subject: below --
2018-07-31 18:45 Matthias Kaehlcke
2018-07-31 18:45 ` [PATCH v6 5/5] arm64: dts: qcom: pm8998: Add pm8998 thermal zone Matthias Kaehlcke

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