But sir i want to enable the ad5604 Digital to analog sensor , where
to add the sensor information
On Wed, Nov 30, 2016 at 6:01 PM, Slawomir Stepien <sst@xxxxxxxxx> wrote:
> On Nov 30, 2016 12:02, Akshay Vijapur wrote:
>> 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
>
> Yes, the overlay.
>
>>
>> /dts-v1/;
>> /plugin/;
>>
>> / {
>>
>> compatible = "brcm,bcm2708";
>>
>> fragment@0 {
>> target = <&spidev0>;
>> __overlay__ {
>> status = "okay";
>
> I think this is not what you want. You should disable the spidev driver, so the
> AD5064 will be able to use SPI lines.
>
>> };
>> };
>>
>>
>> fragment@2 {
>> target = <&spidev0>;
>
> When adding new device on SPI line, you should add it to the spi target.
>
>> (...)
>>
>> 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 .
>
> Guys on rpi forum are quite helpful with solving that kind of problems.
> Nevertheless please analyze this (it is for different driver, but you should get
> the idea):
>
> /dts-v1/;
> /plugin/;
>
> / {
> compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
>
> fragment@0 {
> target = <&spi0>;
> __overlay__ {
> status = "okay";
> };
> };
>
> fragment@1 {
> target = <&spidev0>;
> __overlay__ {
> status = "disabled";
> };
> };
>
> fragment@2 {
> target = <&spidev1>;
> __overlay__ {
> status = "disabled";
> };
> };
>
> fragment@3 {
> target = <&spi0>;
> __overlay__ {
> #address-cells = <1>;
> #size-cells = <0>;
>
> mcp4131: mcp4131@0 {
> compatible = "microchip,mcp4162-502";
> reg = <0>;
> spi-max-frequency = <10000>;
> };
> };
> };
> };
>
> --
> Slawomir Stepien
--
To unsubscribe from this list: send the line "unsubscribe linux-iio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
