1. 14 6月, 2007 1 次提交
    • D
      [POWERPC] Derive ebc ranges property from EBC registers · b2ba34f3
      David Gibson 提交于
      In the device tree for Ebony, the 'ranges' property in the node for
      the EBC bridge shows the mappings from the chip select / address lines
      actually used for the EBC peripherals into the address space of the
      OPB.  At present, these mappings are hardcoded in ebony.dts for the
      mappings set up by the OpenBIOS firmware when it configures the EBC
      bridge.
      
      This replaces the hardcoded mappings with code in the zImage to
      read the EBC configuration registers and create an appropriate ranges
      property based on them.  This should make the zImage and kernel more
      robust to changes in firmware configuration.  In particular, some of
      the Ebony's DIP switches can change the effective address of the Flash
      and other peripherals in OPB space.  With this patch, the kernel will
      be able to cope with at least some of the possible variations.
      Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      b2ba34f3
  2. 08 5月, 2007 1 次提交