Re: [PATCH v3 4/4] Documentation: ABI: /sys/firmware/devicetree/overlays

From: Pantelis Antoniou
Date: Mon Apr 27 2015 - 13:51:32 EST


Hi Greg,

> On Apr 24, 2015, at 23:31 , Greg KH <greg@xxxxxxxxx> wrote:
>
> On Fri, Apr 24, 2015 at 12:45:44PM +0300, Pantelis Antoniou wrote:
>> Documentation ABI entry for overlays sysfs entries.
>>
>> Signed-off-by: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>
>> ---
>> .../ABI/testing/sysfs-firmware-devicetree-overlays | 23 ++++++++++++++++++++++
>> 1 file changed, 23 insertions(+)
>> create mode 100644 Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
>>
>> diff --git a/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
>> new file mode 100644
>> index 0000000..6b81f1c
>> --- /dev/null
>> +++ b/Documentation/ABI/testing/sysfs-firmware-devicetree-overlays
>> @@ -0,0 +1,23 @@
>> +What: /sys/firmware/devicetree/overlays/
>> +Date: March 2015
>> +Contact: Pantelis Antoniou <pantelis.antoniou@xxxxxxxxxxxx>
>> +Description:
>> + This directory contains the applied device tree overlays of
>> + the running system, as directories of the overlay id.
>
> "as"?
>
>> +
>> + enable: The master enable switch, by default is 1, and when
>> + set to 0 it cannot be re-enabled for security reasons.
>
> What are those reasons?
>

Thereâs a whole subthread with Grant & Kees going over security concerns.

http://comments.gmane.org/gmane.linux.drivers.devicetree/101871

> thanks,
>
> greg k-h

Regards

â Pantelis

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