linux-kernel - Re: [PATCH v9 5/9] clk: mmp: Add Marvell PXA1908 clock driver

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Date: Fri, 19 Apr 2024 16:31:14 +0200
From: Duje Mihanović <duje.mihanovic@...le.hr>
To: Catalin Marinas <catalin.marinas@....com>,
 Conor Dooley <conor+dt@...nel.org>,
 "Guilherme G.  Piccoli" <gpiccoli@...lia.com>,
 Haojian Zhuang <haojian.zhuang@...aro.org>,
 Kees Cook <keescook@...omium.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Linus Walleij <linus.walleij@...aro.org>, Lubomir Rintel <lkundrak@...sk>,
 Michael Turquette <mturquette@...libre.com>,
 Rob Herring <robh+dt@...nel.org>, Rob Herring <robh@...nel.org>,
 Tony Lindgren <tony@...mide.com>, Tony Luck <tony.luck@...el.com>,
 Will Deacon <will@...nel.org>, Stephen Boyd <sboyd@...nel.org>
Cc: phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
 Karel Balej <balejk@...fyz.cz>, David Wronek <david@...nlining.org>,
 linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v9 5/9] clk: mmp: Add Marvell PXA1908 clock driver

On Friday, April 12, 2024 4:57:09 AM GMT+2 Stephen Boyd wrote:
> Quoting Duje Mihanović (2024-04-11 03:15:34)
> 
> > On 4/11/2024 10:00 AM, Stephen Boyd wrote:
> > > Is there a reason this file can't be a platform driver?
> > 
> > Not that I know of, I did it like this only because the other in-tree
> > MMP clk drivers do so. I guess the initialization should look like any
> > of the qcom GCC drivers then?
> 
> Yes.

With the entire clock driver code in one file this is quite messy as I also 
needed to add module_init and module_exit functions to (un)register each 
platform driver, presumably because the module_platform_driver macro doesn't 
work with multiple platform drivers in one module. If I split up the driver 
code for each clock controller block into its own file (such as clk-of-
pxa1908-apbc.c) as I believe is the best option, should the commits be split 
up accordingly as well?

> > While at it, do you think the other MMP clk drivers could use a 
conversion?
> 
> I'm a little wary if the conversion cannot be tested though.

I'd rather leave it to someone with the hardware then, especially since the 
only reason I found out about the above is that the board I'm working on 
failed to boot completely without the module_init function.

Regards,
-- 
Duje