dt-bindings: fpga: xilinx-slave-serial: add optional INIT_B GPIO

The INIT_B is used by the 6 and 7 series to report the programming status,
providing more control and information about programming errors.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Moritz Fischer <mdf@kernel.org>

diff --git a/Documentation/devicetree/bindings/fpga/xilinx-slave-serial.txt b/Documentation/devicetree/bindings/fpga/xilinx-slave-serial.txt
index 9f103f3872e8252010a3ea881b181d97019ce842..5ef659c1394d72f29f441bb75771e783ccae7c9b 100644 (file)
--- a/Documentation/devicetree/bindings/fpga/xilinx-slave-serial.txt
+++ b/Documentation/devicetree/bindings/fpga/xilinx-slave-serial.txt
@@ -16,6 +16,10 @@ Required properties:
 - prog_b-gpios: config pin (referred to as PROGRAM_B in the manual)
 - done-gpios: config status pin (referred to as DONE in the manual)
 
+Optional properties:
+- init-b-gpios: initialization status and configuration error pin
+                (referred to as INIT_B in the manual)
+
 Example for full FPGA configuration:
 
        fpga-region0 {
@@ -40,7 +44,8 @@ Example for full FPGA configuration:
                        spi-max-frequency = <60000000>;
                        spi-cpha;
                        reg = <0>;
-                       done-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
                        prog_b-gpios = <&gpio0 29 GPIO_ACTIVE_LOW>;
+                       init-b-gpios = <&gpio0 28 GPIO_ACTIVE_LOW>;
+                       done-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
                };
        };