6.4.4. Altera FPGAs in passive serial modeΒΆ

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>;
};