1. 12 3月, 2014 1 次提交
    • G
      of: Make device nodes kobjects so they show up in sysfs · 75b57ecf
      Grant Likely 提交于
      Device tree nodes are already treated as objects, and we already want to
      expose them to userspace which is done using the /proc filesystem today.
      Right now the kernel has to do a lot of work to keep the /proc view in
      sync with the in-kernel representation. If device_nodes are switched to
      be kobjects then the device tree code can be a whole lot simpler. It
      also turns out that switching to using /sysfs from /proc results in
      smaller code and data size, and the userspace ABI won't change if
      /proc/device-tree symlinks to /sys/firmware/devicetree/base.
      
      v7: Add missing sysfs_bin_attr_init()
      v6: Add __of_add_property() early init fixes from Pantelis
      v5: Rename firmware/ofw to firmware/devicetree
          Fix updating property values in sysfs
      v4: Fixed build error on Powerpc
          Fixed handling of dynamic nodes on powerpc
      v3: Fixed handling of duplicate attribute and child node names
      v2: switch to using sysfs bin_attributes which solve the problem of
          reporting incorrect property size.
      Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
      Tested-by: NSascha Hauer <s.hauer@pengutronix.de>
      Cc: Rob Herring <rob.herring@calxeda.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com>
      Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
      75b57ecf