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Altera FPGAs in passive serial mode
-----------------------------------
This binding defines the control interface to Altera FPGAs in
passive serial mode. This is used to upload the firmware and
to start the FPGA.
Required properties:
- compatible: shall be "altr,fpga-passive-serial" or
"altr,fpga-arria10-passive-serial" for Arria 10
- reg: SPI chip select
- nstat-gpios: Specify GPIO for controlling the nstat pin
- confd-gpios: Specify GPIO for controlling the confd pin
- nconfig-gpios: Specify GPIO for controlling the nconfig pin
Example:
fpga@0 {
compatible = "altr,fpga-passive-serial";
nstat-gpios = <&gpio4 18 0>;
confd-gpios = <&gpio4 19 0>;
nconfig-gpios = <&gpio4 20 0>;
spi-max-frequency = <10000000>;
reg = <0>;
};
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