Respected sir ,
I am using a DAC device with raspberry pi board connected via SPI , So
i am using ad5064 driver in the kernel .
I am seeing that spi probe is not being called . after days of
researching i got to know that i need to add the device tree for this
driver . since i am new to the driver development and usage i tried to
create device tree like this
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2708";
fragment@0 {
target = <&spidev0>;
__overlay__ {
status = "okay";
};
};
fragment@2 {
target = <&spidev0>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
compatible = "spidev";
ad5064@0 {
compatible = "adi,ad5064";
reg = <1>;
spi-max-frequency = <1000000>;
spi-cpha=<1>;
spi-cpol=<1>;
vcc-supply = <&vcc_io>;
};
regulators {
vcc_io: regulator@0 {
regulator-name = "vcc_io";
regulator-min-microvolt = <2500000>;
regulator-max-microvolt = <2500000>;
regulator-boot-on;
};
since i am using raspberry 3 board i tried to add some info about spi
in the dts file , But still spi probe is not happing . so Could you
please help me by specifying how to use the device driver with
raspberry pi 3 board with linux kernel 4.4 in it .
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