Is SPI Working?

[martinayotte]

You don't need to touch that part. I presume, to my understanding, that this is used when the SPI is actually "disabled".
When set to "okay", it is using the following :

spi0@0 {
linux,phandle = <0xa7>;
phandle = <0xa7>;
allwinner,pins = "PC3";
allwinner,function = "spi0";
allwinner,pname = "spi0_cs0";
allwinner,muxsel = <0x4>;
allwinner,pull = <0x1>;
allwinner,drive = <0xffffffff>;
allwinner,data = <0xffffffff>;
};

spi0@1 {
linux,phandle = <0xa8>;
phandle = <0xa8>;
allwinner,pins = "PC2", "PC0", "PC1";
allwinner,function = "spi0";
allwinner,pname = "spi0_sclk", "spi0_mosi", "spi0_miso";
allwinner,muxsel = <0x4>;
allwinner,pull = <0xffffffff>;
allwinner,drive = <0xffffffff>;
allwinner,data = <0xffffffff>;
};

If you look at other peripherals, such uarts or i2c, there are always 2 definitions where one is "io_disabled". In fact, I've never since such "io_disabled" definition on other platforms, such beaglebone/raspberrypi/orangpi.