Hello all, First of all, apologize for the very late answer. But I am resuming this work. This RFC is about describing hardware thermal limits using device tree. Based on the discussion on the first RFC: http://lkml.org/lkml/2013/7/22/319 I have changed the code and the device tree bindings as follows: 1. Now bindings may have several thermal zones per device (req. by Wei Ni) 2. The constants used are now using C preprocessor macros (as per Stephen suggestion) 3. Improved the bindings to have a better representation of links between involved entities (thermal zone, cooling devices, sensors), as suggested by Pawel and Mark. 4. Couple of changes in code, as per previous reviews. 5. Removed policies from DT bindings. In summary, based on the discussion of the first RFC, now the idea is to have thermal zones nodes describing the thermal zones and the hardware limits. Then sensor devices nodes will point to thermal zones via phandles and cooling device will also point to thermal zone via phandles. So, I am also posting the patch series to dt mailing list as requested. Please refer to patch 02/14 to a documentation of what I am proposing. This patch series includes: a. Required changes in cpufreq-cpu0 driver so that it loads cooling device when requested. b. The thermal zone builder based on thermal bindings c. Changes in sensor drivers (as examples) d. Changes in device tree DTS files (as examples) This patch series depends on the fixes I sent to linux-pm: http://lkml.org/lkml/2013/8/23/572 In the above link you will find also the request to have a flag to determine if virtual hwmon device will be created, based on thermal device. All best, Eduardo Valentin (14): cpufreq: cpufreq-cpu0: add dt node parsing for 'cooling-zones' drivers: thermal: introduce device tree parser hwmon: lm75: expose to thermal fw via DT nodes hwmon: tmp102: expose to thermal fw via DT nodes thermal: ti-soc-thermal: use thermal DT infrastructure arm: dts: add omap4 CPU thermal data arm: dts: add omap4430 thermal data arm: dts: add omap4460 thermal data arm: dts: point to cooling-zones on omap4430 cpu node arm: dts: point to cooling-zones on omap4460 cpu node arm: dts: add omap5 GPU thermal data arm: dts: add omap5 CORE thermal data arm: dts: add omap5 thermal data arm: dts: point to cooling-zones on omap5 cpu node .../devicetree/bindings/cpufreq/cpufreq-cpu0.txt | 4 + .../devicetree/bindings/thermal/thermal.txt | 160 +++++++ arch/arm/boot/dts/omap4-cpu-thermal.dtsi | 40 ++ arch/arm/boot/dts/omap443x.dtsi | 6 + arch/arm/boot/dts/omap4460.dtsi | 6 + arch/arm/boot/dts/omap5-core-thermal.dtsi | 27 ++ arch/arm/boot/dts/omap5-gpu-thermal.dtsi | 27 ++ arch/arm/boot/dts/omap5.dtsi | 10 + drivers/cpufreq/cpufreq-cpu0.c | 12 + drivers/hwmon/lm75.c | 31 ++ drivers/hwmon/tmp102.c | 26 ++ drivers/thermal/Kconfig | 13 + drivers/thermal/Makefile | 1 + drivers/thermal/thermal_dt.c | 473 +++++++++++++++++++++ drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 52 ++- include/dt-bindings/thermal/thermal.h | 27 ++ include/linux/thermal.h | 3 + 17 files changed, 907 insertions(+), 11 deletions(-) create mode 100644 Documentation/devicetree/bindings/thermal/thermal.txt create mode 100644 arch/arm/boot/dts/omap4-cpu-thermal.dtsi create mode 100644 arch/arm/boot/dts/omap5-core-thermal.dtsi create mode 100644 arch/arm/boot/dts/omap5-gpu-thermal.dtsi create mode 100644 drivers/thermal/thermal_dt.c create mode 100644 include/dt-bindings/thermal/thermal.h -- 1.8.2.1.342.gfa7285d -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
