It's not the device tree node which is in the include *am33xx.dtsi*, they
both seem to be exactly the same.
tscadc: tscadc@44e0d000 {
compatible = "ti,am3359-tscadc";
reg = <0x44e0d000 0x1000>;
interrupt-parent = <&intc>;
interrupts = <16>;
ti,hwmods = "adc_tsc";
status = "disabled";
tsc {
compatible = "ti,am3359-tsc";
};
am335x_adc: adc {
#io-channel-cells = <1>;
compatible = "ti,am3359-adc";
};
};
On Thu, Apr 21, 2016 at 9:58 PM, William Hermans <[email protected]> wrote:
> Just for added measure, yes the UIO driver does work . .
>
> william@beaglebone:~$ lsuio
> uio0: name=tscadc, version=devicetree, events=0
> map[0]: addr=0x44E0D000, size=4096
>
>
> On Thu, Apr 21, 2016 at 9:51 PM, William Hermans <[email protected]>
> wrote:
>
>> Ok, so the following does *NOT* work on a 4.4.x kernel, but does on a
>> 4.1.x kernel.
>>
>> *Starting off with 4.4.x kernel*
>>
>> william@beaglebone:~$ cat ti/WH-ADC-00A0.dts
>>
>>
>> /dts-v1/;
>> /plugin/;
>>
>> / {
>> compatible = "ti,beaglebone", "ti,beaglebone-black";
>>
>> /* identification */
>> part-number = "WH-ADC";
>> version = "00A0";
>>
>>
>> fragment@0 {
>> target = <&tscadc>;
>> __overlay__ {
>> compatible = "uio";
>> uio-alias = "adc";
>> status = "okay";
>> };
>> };
>> };
>>
>>
>>
>> william@beaglebone:~$ sudo touch /etc/modprobe.d/uio.conf
>> william@beaglebone:~$ sudo nano /etc/modprobe.d/uio.conf
>> # put in /etc/modprobe.d/uio.conf
>> #
>> # make driver match on compatible = "uio";
>> options uio_pdrv_genirq of_id=uio
>>
>> william@beaglebone:~$ ls /dev | grep uio /* Crickets . . .*/
>>
>> william@beaglebone:~$ sudo sh -c "echo ' WH-ADC' >
>> /sys/devices/platform/bone_capemgr/slots"
>> [ 3658.413635] bone_capemgr bone_capemgr: part_number ' WH-ADC', version
>> 'N/A'
>> [ 3658.420830] bone_capemgr bone_capemgr: slot #5: override
>> [ 3658.426181] bone_capemgr bone_capemgr: Using override eeprom data at
>> slot 5
>> [ 3658.433959] bone_capemgr bone_capemgr: slot #5: 'Override Board
>> Name,00A0,Override Manuf, WH-ADC'
>>
>> *Changing to 4.1.x kernel*
>>
>> william@beaglebone:~$ sudo nano /boot/uEnv.txt
>> uname_r=4.1.18-bone-rt-r19
>> william@beaglebone:~$ sudo reboot
>>
>> william@beaglebone:~$ sudo sh -c "echo 'WH-ADC' >
>> /sys/devices/platform/bone_capemgr/slots"
>> [ 62.607962] bone_capemgr bone_capemgr: part_number 'WH-ADC', version
>> 'N/A'
>> [ 62.614993] bone_capemgr bone_capemgr: slot #4: override
>> [ 62.620338] bone_capemgr bone_capemgr: Using override eeprom data at
>> slot 4
>> [ 62.627374] bone_capemgr bone_capemgr: slot #4: 'Override Board
>> Name,00A0,Override Manuf,WH-ADC'
>> [ 62.649771] bone_capemgr bone_capemgr: slot #4: dtbo
>> 'WH-ADC-00A0.dtbo' loaded; overlay id #0
>>
>> So, something between these two versions, has changed, and has broken
>> what worked initially. Perhaps it could even be the adc alias in the main
>> board file ? I haven't looked yet . . .
>>
>>
>>
>>
>>
>> --
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>>
>
>
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