On Sat, 28 Mar 2015 23:33:46 +0100, Pali Rohár wrote: > I think it would be better to locate on which bus are sensors > connected (smbus? isa? pci?), find out HW chips and wrote native > kernel drivers for them... > > I scanned smbus (intel controller connected on pci) on my E6440 > but there is no additional/unknown device. I have no idea where > else could be sensor device connected and accessible (from SMM or > kernel mode).
As much as I hate SMM, native access to a BIOS-owned device is not a good idea, as is it dangerously racy. If anything, we are currently trying to move _away_ from native drivers on a number of systems (basically all systems where acpi_enforce_resources=lax is needed.) On x86, ideally ACPI would offer a standard interface to the hardware monitoring chip and the OS would need a single driver for all boards out there. Failing that, ACPI should provide a clean and safe way to access the chip's registers (read: some mutex to avoid concurrent access to the registers by the BIOS and the OS.) -- Jean Delvare SUSE L3 Support -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
