This is an attempt to finish Martin's great work on the bcm2835 thermal driver. It includes now all Eduardo's suggestions and the explanations from the Raspberry Pi forum [1]. ChangeLog: V1 -> V2: added specific settings depending on compatiblity added trip point based on register setting up ctrl-register if HW is not enabled by firmware as per recommendation of Eric (untested) check that clock frequency is in range (1.9 - 5MHz - as per comment in clk-bcm2835.c) V2 -> V4: moved back to thermal (not using bcm sub-directory) set polling interval to 1second (was 0ms, so interrupt driven) V5 -> V6: added correct depends in KConfig removed defined default for RESET_DELAY removed obvious comments clarify HW setup comments if not set up by FW already move clk_prepare_enable to an earlier stage and add error handling clarify warning when TS-clock runs out of recommended range clk_disable_unprepare added in bcm2835_thermal_remove added comment on recommended temperature ranges for SOC V6 -> V7: removed depends on ARCH_BCM2836 || ARCH_BCM2837 in Kconfig V7 -> V8: rebased V8 -> V9: moved to use the thermal framework offset and slope in thermal_zone_parameters as per request V9 -> V10: implement support for thermal zone descriptor, define offset and slope within DT, apply forum explanations, replace symbolic with octal permissions V10 -> V11: fix parse issue in bcm2837.dtsi, fix probing and remove unused tzp (sorry about this crap) [1] - https://www.raspberrypi.org/forums/viewtopic.php?f=72&t=160289&p=1040448 Stefan Wahren (6): of: base: Implement read function for s32 array thermal: of-thermal: Implement signed coefficient support dt-bindings: Add thermal zone to bcm2835-thermal example ARM: dts: bcm283x: Add CPU thermal zone with 1 trip point ARM64: dts: bcm2837: Define CPU thermal coefficients thermal: bcm2835: add thermal driver for bcm2835 SoC .../bindings/thermal/brcm,bcm2835-thermal.txt | 32 +- arch/arm/boot/dts/bcm2835.dtsi | 4 + arch/arm/boot/dts/bcm2836.dtsi | 4 + arch/arm/boot/dts/bcm283x.dtsi | 21 ++ arch/arm64/boot/dts/broadcom/bcm2837.dtsi | 4 + drivers/thermal/Kconfig | 8 + drivers/thermal/Makefile | 1 + drivers/thermal/bcm2835_thermal.c | 315 ++++++++++++++++++++ drivers/thermal/of-thermal.c | 5 +- include/linux/of.h | 35 +++ 10 files changed, 423 insertions(+), 6 deletions(-) create mode 100644 drivers/thermal/bcm2835_thermal.c -- 1.7.9.5 -- 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
