spi-gpio

[tantal]

Neo has one SPI port and I need two, so would like to add another spi using spi-gpio, but no success (I think).

I am using Armbian 23.02.2 Bullseye, default kernel does not enable it, recompiled using linux-source-5.15.93-sunxi.tar.xz, enabled spi-gpio as module.

Digged around forum, prepared below dts and armbian-add-overlay succeeded.

But there is no message arrived when loading (dmesg shows nothing about spi) and no /dev/spi* created.  Is it OK or there must be something?

Please advise....

 

/ {
        compatible = "allwinner,sun8i-h3";

        fragment@0 {
                target-path = "/";
                __overlay__ {
                        softspi: spi_gpio {
                                compatible = "spi-gpio";
                                #address-cells = <1>;
                                #size-cells = <0>;
                                ranges;
                                sck-gpios  = <&pio 0 15 0>; /* PG6 */
                                mosi-gpios = <&pio 0 16 0>; /* PG7 */
                                miso-gpios = <&pio 0  1 0>; /* PA6 */
                                num-chipselects = <0>;
                                status = "okay";
                                spidev {
                                        compatible = "linux,spidev";
                                        reg = <0>;
                                        spi-max-frequency = <10000000>;
                                        status = "okay";
                                };
                        };
                };
        };
};
 

 

 

 

[tantal]

I could solved by myself.

I specified wrong gpio number therefore no activities.

Now I see the device connected to spi-gpio is working.

 

Thank you.