linux-kernel - Re: [PATCH v1] max77663-rtc: pass rtc address from device tree node if exists

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Message-ID: <202303080942204be1ceeb@mail.local>
Date:   Wed, 8 Mar 2023 10:42:20 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Svyatoslav Ryhel <clamor95@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        linux-kernel@...r.kernel.org, linux-rtc@...r.kernel.org
Subject: Re: [PATCH v1] max77663-rtc: pass rtc address from device tree node
 if exists

On 08/03/2023 10:14:22+0100, Krzysztof Kozlowski wrote:
> On 08/03/2023 10:11, Krzysztof Kozlowski wrote:
> > On 08/03/2023 09:58, Svyatoslav Ryhel wrote:
> >> I would love to, but max77663 uses max77686 rtc
> >> https://github.com/torvalds/linux/blob/master/drivers/mfd/max77620.c#L123
> >> how to handle this?
> > 
> > Don't top post.
> > 
> > Hm, so it seems max7763 is already documented via max77620. I missed
> > that. Add the new property to max77620, not to max77686 RTC. It does not
> > look like RTC's property, but the PMIC's.
> 
> To clarify - the I2C address selection for regmap is in max77686 RTC,
> but I meant DT property.
> 
> Different thing is that we do not pass addresses as property fields.
> These should be devices on the I2C bus rather... unless you are aware of
> existing property like this?
>

I'd say that the RTC should have been modeled as a discrete component
from the beginning instead of using an i2c dummy device
 
> Best regards,
> Krzysztof
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com