[OpenWrt-Devel] [bcm53xx] Pin Controller in Northstar

[Rafał Miłecki]

Hi Vivek & sorry for late reply.

It took me few hours to evaluate current DMU / CRU / pinctrl situation.

On 03.05.2020 22:15, Vivek Unune wrote:
> On Sun, Apr 5, 2020 at 10:48 AM Vivek Unune <npcomplete13 at gmail.com> wrote:
>>
>> On Tue, Mar 31, 2020 at 5:51 PM Vivek Unune <npcomplete13 at gmail.com> wrote:
>>>
>>> Hi All / Rafał,
>>>
>>> I'm about to update device tree for Linksys Panamera router (aka
>>> EA9500) so that it uses pin controller defined in BCM5301X.dtsi [1].
>>> However, the mainline kernel's Northstar pinctrl driver code
>>> (ns-pinctrl.cs [2]) is out of sync with the device tree. As you see,
>>> the driver looks for syscon node which is absent in the device tree.
>>>
>>> Was there a patch submitted to update the device tree along with the
>>> driver? I could only find the patch wrt the driver [3]
>>>
>>> If the device tree was indeed updated, which git repository should I
>>> use to prepare and test my patch?

That mismatch is caused by a failed cleanup action for DMU / CRU. I
decided to refactor those bindings, some changes were accepted and some
were rejected as Rob found some issues in my submitted work.

It results in a slightly messy situation that needs sorting out properly
with all nodes considered. I'll write e-mail to devicetree@ shortly.


>>> Thanks,
>>>
>>> Vivek
>>>
>>> [1] https://github.com/torvalds/linux/blob/master/arch/arm/boot/dts/bcm5301x.dtsi
>>> [2] https://github.com/torvalds/linux/blob/master/drivers/pinctrl/bcm/pinctrl-ns.c
>>> [3] https://patchwork.kernel.org/patch/10735933/
>>
>> Adding Rafał
>>
>> So I've managed to compile and have the pincontrol working in OpenWrt.
>> However, in order to submit my patch upstream I will need correct tree
>> to create my patch.
>>
>> Rafał - can you point me in the right direction?
>>
>> Thanks,
>>
>> Vivek
> 
> Bump & change subject.

For DTS changes you should branch devicetree/next of:
https://github.com/Broadcom/stblinux.git

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