This adds LAN966 SoC DT bindings documentation for Flexcom
Shared and chip-select configurations.
Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@xxxxxxxxxxxxx>
---
.../devicetree/bindings/mfd/atmel-flexcom.txt | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt b/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt
index 692300117c64..a76622082228 100644
--- a/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt
+++ b/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt
@@ -18,6 +18,15 @@ Required properties:
- <2> for SPI
- <3> for I2C
+Optional properties:
+- Flexcom shared configurations: Each flexcom of lan966 SoC has 2 chip selects.
+ For each chip select, there is a pin configuration register.
+ The width of the configuration register is 21 because there are 21 shared
+ pins on each of which the chip select can be mapped. Each bit of the
+ configuration register represents a different FLEXCOM_SHARED pin.
+ - lan966x-ss-pin: Should be a flexcom shared pin.
+ - lan966x-cs: Should be chip select 0 or 1.
+
Required child:
A single available child device of type matching the "atmel,flexcom-mode"
property.
@@ -41,6 +50,9 @@ flexcom@f8034000 {
#size-cells = <1>;
ranges = <0x0 0xf8034000 0x800>;
atmel,flexcom-mode = <2>;
+ /* Map chip-select index 0 of the flexcom to FLEXCOM_SHARED 9 */
+ lan966x-ss-pin = <9>;
+ lan966x-cs = <0>;
spi@400 {
compatible = "atmel,at91rm9200-spi";
--
2.17.1
