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Date:   Thu, 13 Jan 2022 10:32:29 +0100
From:   Miquel Raynal <miquel.raynal@bootlin.com>
To:     Alexander Aring <alex.aring@gmail.com>
Cc:     Stefan Schmidt <stefan@datenfreihafen.org>,
        linux-wpan - ML <linux-wpan@vger.kernel.org>,
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        Xue Liu <liuxuenetmail@gmail.com>, Alan Ott <alan@signal11.us>,
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        Romuald Despres <romuald.despres@qorvo.com>,
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        Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
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Subject: Re: [wpan-next v2 01/27] net: mac802154: Split the set channel hook
 implementation
Message-ID: <20220113103229.64612657@xps13>
In-Reply-To: <CAB_54W7uEQ5RJZxKT2qimoT=pbu8NsUhbZWZRWg+QjXDoTPFuQ@mail.gmail.com>
References: <20220112173312.764660-1-miquel.raynal@bootlin.com>
        <20220112173312.764660-2-miquel.raynal@bootlin.com>
        <CAB_54W7uEQ5RJZxKT2qimoT=pbu8NsUhbZWZRWg+QjXDoTPFuQ@mail.gmail.com>
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Hi Alexander,

alex.aring@gmail.com wrote on Wed, 12 Jan 2022 17:30:35 -0500:

> Hi,
> 
> On Wed, 12 Jan 2022 at 12:33, Miquel Raynal <miquel.raynal@bootlin.com> wrote:
> >
> > As it is currently designed, the set_channel() cfg802154 hook
> > implemented in the softMAC is doing a couple of checks before actually
> > performing the channel change. However, as we enhance the support for
> > automatically setting the symbol duration during channel changes, it
> > will also be needed to ensure that the corresponding channel as properly
> > be selected at probe time. In order to verify this, we will need to  
> 
> no, we don't set channels at probe time. We set the
> current_page/channel whatever the default is according to the hardware
> datasheet. I think this channel should be dropped and all drivers set
> the defaults before registering hw as what we do at e.g. at86rf230,
> see [0].

Is there a reason for refusing to call ->set_channel() at probe time?

Anyway, I'll put the symbol duration setting in the registration helper
and I will fix hwsim aside.

> 
> - Alex
> 
> [0] https://elixir.bootlin.com/linux/v5.16/source/drivers/net/ieee802154/at86rf230.c#L1553


Thanks,
Miquèl