On Tue, 11 Sep 2012 12:41:16 +0200, Samuel Ortiz wrote: > Hi Jean, > > On Mon, Jul 23, 2012 at 05:34:15PM +0200, Jean Delvare wrote: > > The ICH chips have their GPIO pins organized in 2 or 3 independent > > groups of 32 GPIO pins. It can happen that the ACPI BIOS wants to make > > use of pins in one group, preventing the OS to access these. This does > > not prevent the OS from accessing the other group(s). > > > > This is the case for example on my Asus Z8NA-D6 board. The ACPI BIOS > > wants to control GPIO 18 (group 1), while I (the OS) need to control > > GPIO 52 and 53 (group 2) for SMBus multiplexing. > > > > So instead of checking for ACPI resource conflict on the whole I/O > > range, check on a per-group basis, and consider it a success if at > > least one of the groups is available for the OS to use. > > > > Signed-off-by: Jean Delvare <[email protected]> > > Cc: Peter Tyser <[email protected]> > > Cc: Aaron Sierra <[email protected]> > > Cc: Grant Likely <[email protected]> > > Cc: Samuel Ortiz <[email protected]> > > --- > > That's probably not the nicest code you've seen, but everything else I > > could think of either couldn't work or was looking worse. If anyone can > > think of a better approach, I'm all ears. > > > > drivers/gpio/gpio-ich.c | 79 > > +++++++++++++++++++++++++++++++++++++------ > > drivers/mfd/lpc_ich.c | 29 ++++++++++++++- > > include/linux/mfd/lpc_ich.h | 1 > > 3 files changed, 97 insertions(+), 12 deletions(-) > Applied (finally) to my for-next branch, thanks.
Excellent, thank you! -- Jean Delvare -- 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/
