linux-kernel - Re: Re: [RFC PATCH 3/4] i2c: core: treat EPROBE

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Date:   Mon, 3 Aug 2020 18:59:14 +0200
From:   <wsa@...nel.org>
To:     <Codrin.Ciubotariu@...rochip.com>
Cc:     <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <robh+dt@...nel.org>,
        <Ludovic.Desroches@...rochip.com>, <Nicolas.Ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <linux@...linux.org.uk>,
        <kamel.bouhara@...tlin.com>
Subject: Re: Re: [RFC PATCH 3/4] i2c: core: treat EPROBE_DEFER when acquiring
 SCL/SDA GPIOs


> > This is correct but I think the code flow is/was confusing. Can you drop
> > this 'return' and use 'else if' for the next code block? I think this is
> > more readable.
> 
> Ok, it makes sense. Should I make a separate patch for this only?

I am fine if this is included in this change.

> One more question, should we keep:
> if (!bri->set_sda && !bri->get_sda) {
> 	err_str = "either get_sda() or set_sda() needed";
> 	goto err;
> }
> ?
> Without {get/set}_sda we won't be able to generate stop commands and 
> possibly check if the bus is free, but we can still generate the SCL 
> clock pulses.

My gut feeling says we need to keep it. I can't recall the reason now
and want to send out this answer ASAP. Anyhow, this definately would be
a seperate patch. If you really want to, send a patch, and then I have
to think why we still need it ;)

> Ok. Perhaps I should also move the debug print with the registered 
> adapter after calling i2c_init_recovery().

Yes, makes sense.

> Do you want me to integrate this patch in the previous one?

Nope, please keep it seperate.


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