QSPI1 on RZG2L DEVICE TREE

Question

Hi everyone,

On my rzg2l I would like to use SPI mapped to the QSPI1 dedicated pins shown below:

I'm interested in using the device as a normal SPI1, is it possible? And if so, how should I create the device in the device tree? I tried writing like this in the file rzg2l-smarc-som.dtsi

&spi1 {
pinctrl-0 = <&qspi1_pins>;
pinctrl-names = "default";
status = "okay";

adc@0 {
compatible = "spidev";
reg = <0>;
spi-max-frequency = <10000000>;
};

}

dove qspi1_pins è:

qspi1_pins: spi1 {
qspi1-data {
pins = "QSPI1_IO0", "QSPI1_IO1", "QSPI1_IO2", "QSPI1_IO3";
power-source = <1800>;
};

qspi1-ctrl {
pins = "QSPI1_SPCLK", "QSPI1_SSL", "QSPI_RESET#";
power-source = <1800>;
};
};

But when I launch the system and from the console I enter in the /dev folder, I don't find the spi1 device.

I would expect to find the SPI1 device and by echo "test" > spidev1 to see the characters come out of the SPI.

egret · Accepted Answer

Hello, AndEdo 
 I don't think it's possible. 
 
 The QSPI1 dedicated pins are dedicated to the SPI multi I/O bus controller. And the SPI multi I/O bus controller functions as a bus bridge connected to the MPU bus in the system, not as an SPI communication controller. So even if you add a node for the SPI communication controller to the device tree, the driver for the SPI multi I/O bus controller won't refer to it. BR

QSPI1 on RZG2L DEVICE TREE

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