On Tuesday 20 October 2009 08:30:16 pm Crane Cai wrote: > Hi Darrick, > > On Tue, Oct 20, 2009 at 04:11:49PM -0700, Darrick J. Wong wrote: > > On some old IBM workstations and desktop computers, the BIOS presents in the > > DSDT an SMBus object that is missing the HID identifier that the i2c-scmi > > driver looks for. It also omits the leading "_" in the method names (it > > should > > be _SBR, not SBR_). Modify the ACPI device scan code to insert the missing > > HID > > if it finds an IBM system with such an object, and modify the i2c-scmi > > driver > > to handle the odd method names. > I have a suggestion: > You can need not to add quirk in acpi part, instead you can add your ACPI > device > HID in i2c-scmi with your specificied methods set.
Maybe Darrick understands your suggestion, but I don't. The only way i2c-scmi ever learns about a device is when acpi_smbus_cmi_add() is called, and that's only called when the Linux/ACPI core has found a device that matches "SMBUS01". Can you elaborate on your suggestion? The i2c-scmi driver *could* walk the whole namespace itself, looking for devices with the SBI/SBR/SBW methods, but I like Darrick's quirk approach better because it allows i2c-scmi to continue to use the normal ACPI driver model. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
