[media] media: st-rc: Add ST remote control driver

This patch adds support to ST RC driver, which is basically a IR/UHF
receiver and transmitter. This IP (IRB) is common across all the ST
parts for settop box platforms. IRB is embedded in ST COMMS IP block.
It supports both Rx & Tx functionality.
This driver adds only Rx functionality via LIRC codec.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Acked-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/media/st-rc.txt b/Documentation/devicetree/bindings/media/st-rc.txt
new file mode 100644
index 000000000000..05c432d08bca
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/st-rc.txt
@@ -0,0 +1,29 @@
+Device-Tree bindings for ST IRB IP
+
+Required properties:
+        - compatible: Should contain "st,comms-irb".
+        - reg: Base physical address of the controller and length of memory
+          mapped region.
+        - interrupts: interrupt-specifier for the sole interrupt generated by
+          the device. The interrupt specifier format depends on the interrupt
+          controller parent.
+        - rx-mode: can be "infrared" or "uhf". This property specifies the L1
+          protocol used for receiving remote control signals. rx-mode should
+          be present iff the rx pins are wired up.
+        - tx-mode: should be "infrared". This property specifies the L1
+          protocol used for transmitting remote control signals. tx-mode should
+          be present iff the tx pins are wired up.
+
+Optional properties:
+        - pinctrl-names, pinctrl-0: the pincontrol settings to configure muxing
+          properly for IRB pins.
+        - clocks : phandle with clock-specifier pair for IRB.
+
+Example node:
+
+        rc: rc@fe518000 {
+                compatible      = "st,comms-irb";
+                reg             = <0xfe518000 0x234>;
+                interrupts      = <0 203 0>;
+                rx-mode         = "infrared";
+        };