I am using ad5628 DAC with RaspberryPi 3 Board on SPI interface , I have found drivers for ad5604 (Linux/drivers/iio/dac/ad5064.c - Linux Cross Reference - Free Electrons ) , I believe that it will work for ad5628 also .
So when i enabled the drivers in the Yocto kernel . i didnt get any handle for the device at the location
sys/bus/iio/devices/
(NO DEVICE)
so i came to know that i need to write device tree for the driver (AD5446 IIO DAC Linux Driver [Analog Devices Wiki] ) so i have wrote a DTS file
/dts-v1/;
/plugin/;
/ {
fragment@0 {
target = <&spi0>;
__overlay__ {
cs-gpios = <0>, <0>;
status = "okay";
};
};
fragment@1 {
target = <&spi0_cs_pins>;
__overlay__ {
brcm,pins = <8 7>;
brcm,function = <4>; /* alt0 */
};
};
ad5628:dac@0 {
compatible = "brcm,bcm2708";
dac_vcc: fixedregulator@1 {
compatible = "regulator-fixed";
regulator-name = "fixed-supply";
regulator-min-microvolt = <2500000>;
regulator-max-microvolt = <2500000>;
regulator-boot-on;
};};
ad5064: spi@42040000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "xlnx,axi-spi-1.02.a", "xlnx,xps-spi-2.00.a","&spi0";
ad5064@0 {
compatible = "adi,ad5064";
reg = <1>;
spi-max-frequency = <1000000>;
spi-cpha=<1>;
spi-cpol=<1>;
vcc-supply = <&dac_vcc>;
};
};
};
But now still there is no device at the location at path sys/bus/iio/.
So please help me to solve this issue by specifying weather my written DTS is correct for raspberrypi board .
Thanks
