[PATCH v2] ath79: add support for reset key on MikroTik RB912UAG-2HPnD

Koen Vandeputte koen.vandeputte at citymesh.com
Wed Jan 19 07:42:06 PST 2022

On 19.01.22 11:50, Sergey Ryazanov wrote:
> On Wed, Jan 19, 2022 at 1:25 PM Denis Kalashnikov <denis281089 at gmail.com> wrote:
>> On MikroTik RB91x board series a reset key shares SoC gpio
>> line #15 with NAND ALE and NAND IO7. So we need a custom
>> gpio driver to manage this non-trivial connection schema.
>> Also rb91x-nand needs to have an ability to disable a polling
>> of the key while it works with NAND.
>> While we've been integrating rb91x-key into a firmware, we've
>> figured out that:
>> * In the gpio-latch driver we need to add a "cansleep" suffix to
>> several gpiolib calls,
>> * When gpio-latch and rb91x-nand fail to get a gpio and an error
>> is -EPROBE_DEFER, they shouldn't report about this, since this
>> actually is not an error and occurs when the gpio-latch probe
>> function is called before the rb91x-key probe.
>> We fix these related things here too.
>> Signed-off-by: Denis Kalashnikov <denis281089 at gmail.com>
> Reviewed-by: Sergey Ryazanov <ryazanov.s.a at gmail.com>

Works as advertised.
Pushed to master.



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