Category: Software
Product Number: AD9528
Software Version: 2021_R1
Hello,
I have a ad9528 that is powered by a GPIO switched, fixed regulator. The dts binding is shown below (note that regulator-boot-on and regulator-always-on were debugging attempts):
vdda_3v3_2: vdda-3v3-2 {
compatible = "regulator-fixed";
regulator-name = "vdda_3v3_2";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
startup-delay-us = <150000>;
gpio = <&gpio0 98 0>;
enable-active-high;
regulator-boot-on;
regulator-always-on;
};
The ad9528 has the following line in it:
vcc-supply = <&vdda_3v3_2>;
When I boot the ad9528 tried to probe the device before the regulator comes online - this is, of course, problematic because the probe fails. I have verified everything else in the devicetree is correct by manually enabling the GPIO in U-Boot, supplying power to the device before starting Linux. When I do this the device probes successfully.
Is there something I am missing? I looked at the driver code and it looks like it should be enabling the regulator before accessing the device.