Hi Paul, > Previously the OMAP watchdog driver used a non-standard way to report > the chip reset source via the GETBOOTSTATUS ioctl. This patch > converts the driver to use the standard WDIOF_* flags for this > purpose. > > This patch may break existing userspace code that uses the existing > non-standard data format returned by the OMAP watchdog driver's > GETBOOTSTATUS ioctl. To fetch detailed reset source information, > userspace code will need to retrieve it directly from the CGRM or PRM > drivers when those are completed. > > Previously, to fetch the reset source, the driver either read a > register outside the watchdog IP block (OMAP1), or called a function > exported directly from arch/arm/mach-omap2. Both approaches are > broken. This patch also converts the driver to use a platform_data > function pointer. This approach is temporary, and is due to the lack > of drivers for the OMAP16xx+ Clock Generation and Reset Management IP > block and the OMAP2+ Power and Reset Management IP block. Once > drivers are available for those IP blocks, the watchdog driver can be > converted to call exported drivers from those functions directly. > At that point, the platform_data function pointer can be removed. > > In the short term, this patch is needed to allow the PRM code to be > removed from arch/arm/mach-omap2 (it is being moved to a driver). > > Signed-off-by: Paul Walmsley <paul@xxxxxxxxx> > Cc: Wim Van Sebroeck <wim@xxxxxxxxx> Signed-off-by: Wim Van Sebroeck <wim@xxxxxxxxx> Kind regards, Wim. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
