RE: Reg:Trying to get the ADC working on the Beaglebone with 3.8 kernel

Hi Anil,
Thanks for the reply. The pins AIN0 to AIN7 are signals right? Do they have
pin mux? I'm sorry if this question is very vague. 

Regards,
Vijay

-----Original Message-----
From: Anil Kumar [mailto:anilk4.v-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org] 
Sent: Tuesday, February 12, 2013 7:10 PM
To: Vijay S
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org
Subject: Re: Reg:Trying to get the ADC working on the Beaglebone with 3.8
kernel

Hi Vijay,

On Tue, Feb 12, 2013 at 6:49 PM, Vijay S [off-list ref] wrote:

Hi,

Am trying to get the ADC working on the beagle bone. Have cloned/pulled

the

latest kernel from the following branch
https://github.com/beagleboard/kernel/tree/3.8 , applied the patches and
built the kernel.



Have included the below structure under the am335x-bone-common.dtsi
(attached herewith is the dts file for your reference)



tscadc@44e0d000 {

                                    status = "okay";

                                    compatible = "ti,ti-tscadc";

                                    reg = <0x44e0d000 0x1000>;

                        interrupt-parent = <&intc>;

                        interrupts = <16>;

                        ti,hwmods = "adc_tsc";

            };



&tscadc {

        tsc {

              ti,wires = <4>;

            ti,x-plate-resistance = <200>;

               ti,steps-to-configure = <5>;

             ti,wire-config = <0x00 0x11 0x22 0x33>;

        };



        adc {

                ti,adc-channels = <8>;

        };

have you done pin mux for this ?

The device is getting registered( [1.578678] input: ti-tsc as
/devices/ocp.2/44e0d000.tscadc/tsc/input/input0

[    1.586799] tsc tsc: Initialized OK) as can be seen from the attached
kernel log(3.8_kernel_ts_adc_sys_iio_devices.txt).



Am able to view the "tiadc" under the devices in the following path  cat
/sys/devices/ocp.2/44e0d000.tscadc/tiadc/iio\:device0/  and cat
/sys/bus/iio/devices/iio\:device0/ , but am not able to list out
"in_voltageX_raw" in either of the paths.



Can you please suggest if am missing anything?



Regards,

Vijay




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