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authorSascha Hauer <s.hauer@pengutronix.de>2020-08-17 08:16:38 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2020-08-17 09:51:44 +0200
commit0c2e2b7d8fd795c24abc7bfd3752eb3e366155eb (patch)
tree21cddf4b49891b7df21cbe5e5dd358d4e44e031d /dts/Bindings/fpga/xilinx-slave-serial.txt
parent8ef08db9ad225acbf7326493cc586bb14fd917f5 (diff)
downloadbarebox-0c2e2b7d8fd795c24abc7bfd3752eb3e366155eb.tar.gz
barebox-0c2e2b7d8fd795c24abc7bfd3752eb3e366155eb.tar.xz
dts: update to v5.9-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/fpga/xilinx-slave-serial.txt')
-rw-r--r--dts/Bindings/fpga/xilinx-slave-serial.txt16
1 files changed, 12 insertions, 4 deletions
diff --git a/dts/Bindings/fpga/xilinx-slave-serial.txt b/dts/Bindings/fpga/xilinx-slave-serial.txt
index cfa4ed42b6..5ef659c139 100644
--- a/dts/Bindings/fpga/xilinx-slave-serial.txt
+++ b/dts/Bindings/fpga/xilinx-slave-serial.txt
@@ -1,11 +1,14 @@
Xilinx Slave Serial SPI FPGA Manager
-Xilinx Spartan-6 FPGAs support a method of loading the bitstream over
-what is referred to as "slave serial" interface.
+Xilinx Spartan-6 and 7 Series FPGAs support a method of loading the
+bitstream over what is referred to as "slave serial" interface.
The slave serial link is not technically SPI, and might require extra
circuits in order to play nicely with other SPI slaves on the same bus.
-See https://www.xilinx.com/support/documentation/user_guides/ug380.pdf
+See:
+- https://www.xilinx.com/support/documentation/user_guides/ug380.pdf
+- https://www.xilinx.com/support/documentation/user_guides/ug470_7Series_Config.pdf
+- https://www.xilinx.com/support/documentation/application_notes/xapp583-fpga-configuration.pdf
Required properties:
- compatible: should contain "xlnx,fpga-slave-serial"
@@ -13,6 +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 {
@@ -37,7 +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>;
};
};