linux-kernel - Re: [PATCH v6 2/2] dt-bindings: rtc: add max313xx RTCs

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Date: Tue, 6 Feb 2024 23:16:44 +0100
From: Alexandre Belloni <alexandre.belloni@...tlin.com>
To: Chris Packham <Chris.Packham@...iedtelesis.co.nz>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>,
	"jdelvare@...e.com" <jdelvare@...e.com>,
	"linux@...ck-us.net" <linux@...ck-us.net>,
	"antoniu.miclaus@...log.com" <antoniu.miclaus@...log.com>,
	"noname.nuno@...il.com" <noname.nuno@...il.com>,
	"linux-rtc@...r.kernel.org" <linux-rtc@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
	Ibrahim Tilki <Ibrahim.Tilki@...log.com>,
	Zeynep Arslanbenzer <Zeynep.Arslanbenzer@...log.com>
Subject: Re: [PATCH v6 2/2] dt-bindings: rtc: add max313xx RTCs

On 06/02/2024 21:41:10+0000, Chris Packham wrote:
> 
> On 7/02/24 10:12, Alexandre Belloni wrote:
> > On 06/02/2024 20:19:20+0000, Chris Packham wrote:
> >> That is an incredibly good point. The max31335 binding covers one specific chip. This binding covers more and with that there are a few more properties that the max31335 on it's own doesn't have (e.g. the clock consumer, the ability to have different i2c addresses). Binding wise I could probably roll all of the max31335 into this max313xx binding.
> >>
> >> Driver wise things are a bit trickier. I've only got access to one of
> >> the variants so I am hoping to leverage the work Ibrahim had already
> >> done. I could attempt to incorporate max31335 support into the
> >> max313xx driver but I wouldn't really be able to test it properly and
> >> there is a reasonably high chance of regressing something.
> > But I won't take a separate driver. Everything would be better if Analog
> > was sharing the datasheets...
> 
> The datasheets are pretty accessible so I'd give Analog a pass on that 
> (they're certainly better than some vendors). I'll include some links on 
> the next update.
> 

The max31335 is not available

> I'll attempt to roll the max31335 into the max313xx driver.

I guess this would be the opposite. Renaming a driver breaks existing
kernel configurations.

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