1 files changed, 12 insertions, 0 deletions

diff --git a/Documentation/powerpc/mpc52xx-device-tree-bindings.txt b/Documentation/powerpc/mpc52xx-device-tree-bindings.txt
index 5e03610e186f..cda7a7dffa6d 100644
--- a/Documentation/powerpc/mpc52xx-device-tree-bindings.txt
+++ b/Documentation/powerpc/mpc52xx-device-tree-bindings.txt
@@ -186,6 +186,12 @@ Recommended soc5200 child nodes; populate as needed for your board
 name            device_type     compatible        Description
 ----            -----------     ----------        -----------
 gpt@<addr>      gpt             fsl,mpc5200-gpt   General purpose timers
+gpt@<addr>      gpt             fsl,mpc5200-gpt-gpio    General purpose
+                                                        timers in GPIO mode
+gpio@<addr>                     fsl,mpc5200-gpio        MPC5200 simple gpio
+                                                        controller
+gpio@<addr>                     fsl,mpc5200-gpio-wkup   MPC5200 wakeup gpio
+                                                        controller
 rtc@<addr>      rtc             mpc5200-rtc       Real time clock
 mscan@<addr>    mscan           mpc5200-mscan     CAN bus controller
 pci@<addr>      pci             mpc5200-pci       PCI bridge
@@ -225,6 +231,12 @@ PSC in i2s mode:  The mpc5200 and mpc5200b PSCs are not compatible when in
 i2s mode.  An 'mpc5200b-psc-i2s' node cannot include 'mpc5200-psc-i2s' in the
 compatible field.
 
+7) GPIO controller nodes
+Each GPIO controller node should have the empty property gpio-controller and
+#gpio-cells set to 2. First cell is the GPIO number which is interpreted
+according to the bit numbers in the GPIO control registers. The second cell
+is for flags which is currently unsused.
+
 IV - Extra Notes
 ================