spi/atmel: document clock properties

Document the clock properties required by the spi-atmel driver.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/spi/spi_atmel.txt b/Documentation/devicetree/bindings/spi/spi_atmel.txt
index 07e04cdc0c9e..4f8184d069cb 100644
--- a/Documentation/devicetree/bindings/spi/spi_atmel.txt
+++ b/Documentation/devicetree/bindings/spi/spi_atmel.txt
@@ -5,6 +5,9 @@ Required properties:
 - reg: Address and length of the register set for the device
 - interrupts: Should contain spi interrupt
 - cs-gpios: chipselects
+- clock-names: tuple listing input clock names.
+        Required elements: "spi_clk"
+- clocks: phandles to input clocks.
 
 Example:
 
@@ -14,6 +17,8 @@ spi1: spi@fffcc000 {
         interrupts = <13 4 5>;
         #address-cells = <1>;
         #size-cells = <0>;
+        clocks = <&spi1_clk>;
+        clock-names = "spi_clk";
         cs-gpios = <&pioB 3 0>;
         status = "okay";