From 6a4d6825acf324c02198fa73838c1eeaf4fdffc7 Mon Sep 17 00:00:00 2001 From: Tobias Diedrich Date: Sun, 21 Jun 2015 18:25:38 +0200 Subject: amd/family14: Add k10temp thermal zone. The thermal sensor interface exposed in function 3 of the northbridge is a more convenient and faster way to access the processor-internal thermal sensor than using the SMBus/SB-TSI interface from the FCH, see the Family14 BKDG: "Tctl is a processor temperature control value used for processor thermal management. Tctl is accessible through SB-TSI and D18F3xA4[CurTmp]. Tctl is a temperature on its own scale aligned to the processors cooling requirements" Also on at least some of these boards the existing thermal zone is broken and always returns 40C (the default value if the SMBus read failed) because the SMBus muxing register (SmBus0Sel) is not set up correctly. Case in point: The fallback "smbus read failed" temperature is 40 C and the the logs taken from the board status repository for the Asrock E350M1 board all show: "ACPI: Thermal Zone [TZ00] (40 C)" e.g. http://review.coreboot.org/gitweb?p=board-status.git;a=blob;f=asrock/e350m1/4.0-5054-gf584218/2013-12-20T20:56:20Z/kernel_log.txt#l390 and http://review.coreboot.org/gitweb?p=board-status.git;a=blob;f=asrock/e350m1/4.0-7030-g6d7de4f/2014-10-16T15:34:19Z/kernel_console.txt#l404 and http://review.coreboot.org/gitweb?p=board-status.git;a=blob;f=asrock/e350m1/4.0-9989-gf2dfef0/2015-06-13T00:22:49Z/kernel_log.txt#l425 Example lm-sensors output with this patch on the pcengines APU1, on Linux 4.1.0-rc8+ (wiht both CONFIG_ACPI_THERMAL and CONFIG_SENSORS_K10TEMP enabled): acpitz-virtual-0 Adapter: Virtual device temp1: +54.0 C (crit = +100.0 C) k10temp-pci-00c3 Adapter: PCI adapter temp1: +54.0 C (high = +70.0 C) (crit = +100.0 C, hyst = +97.0 C) Change-Id: Id9c5b783ba424246816677099ec6651814e59f21 Signed-off-by: Tobias Diedrich Reviewed-on: http://review.coreboot.org/10940 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel Reviewed-by: Patrick Georgi --- src/northbridge/amd/agesa/family14/acpi/northbridge.asl | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'src/northbridge/amd/agesa') diff --git a/src/northbridge/amd/agesa/family14/acpi/northbridge.asl b/src/northbridge/amd/agesa/family14/acpi/northbridge.asl index bb051b9548..ef51e7c689 100644 --- a/src/northbridge/amd/agesa/family14/acpi/northbridge.asl +++ b/src/northbridge/amd/agesa/family14/acpi/northbridge.asl @@ -126,3 +126,11 @@ Device(PE23) { Return (PE3) /* PIC Mode */ } /* end _PRT */ } /* end PE23 */ + +/* Northbridge function 3 */ +Device(NBF3) { + Name(_ADR, 0x00180003) + + /* k10temp thermal zone */ + #include +} /* end NBF3 */ -- cgit v1.2.3