linux-kernel - Re: [PATCH 3/3] power: supply: initial support for TWL6030/32

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Message-ID: <20240923182948.571eaa59@akair>
Date: Mon, 23 Sep 2024 18:29:48 +0200
From: Andreas Kemnade <andreas@...nade.info>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: tony@...mide.com, Sebastian Reichel <sre@...nel.org>,
 linux-omap@...r.kernel.org, devicetree@...r.kernel.org, Lee Jones
 <lee@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, linux-kernel@...r.kernel.org, Conor Dooley
 <conor+dt@...nel.org>, linux-pm@...r.kernel.org
Subject: Re: [PATCH 3/3] power: supply: initial support for TWL6030/32

Am Wed, 18 Sep 2024 12:43:01 +0200
schrieb Krzysztof Kozlowski <krzk@...nel.org>:

> On 18/09/2024 10:41, Andreas Kemnade wrote:
> > Add a driver for the charger in the TWL6030/32. For now it does not
> > report much in sysfs but parameters are set up for USB, charging is
> > enabled with the specified parameters. It stops charging when full
> > and also restarts charging.
> > This prevents ending up in a system setup where you run out of
> > battery although a charger is plugged in after precharge completed.
> > 
> > Battery voltage behavior was checked via the GPADC.
> >   
> 
> Few stylistic comments below.
> 
> > Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> > ---
> >  drivers/power/supply/Kconfig           |  10 +
> >  drivers/power/supply/Makefile          |   1 +
> >  drivers/power/supply/twl6030_charger.c | 566
> > +++++++++++++++++++++++++ 3 files changed, 577 insertions(+)
> >  create mode 100644 drivers/power/supply/twl6030_charger.c
> > 
> > diff --git a/drivers/power/supply/Kconfig
> > b/drivers/power/supply/Kconfig index bcfa63fb9f1e2..9f2eef6787f7a
> > 100644 --- a/drivers/power/supply/Kconfig
> > +++ b/drivers/power/supply/Kconfig
> > @@ -493,6 +493,16 @@ config CHARGER_TWL4030
> >  	help
> >  	  Say Y here to enable support for TWL4030 Battery Charge
> > Interface. 
> > +config CHARGER_TWL6030
> > +	tristate "OMAP TWL6030 BCI charger driver"
> > +	depends on IIO && TWL4030_CORE  
> 
> || COMPILE_TEST, at least for TWL part
> (but please test first)
> 
ERROR: modpost: "twl_i2c_write"
[drivers/power/supply/twl6030_charger.ko] undefined! ERROR: modpost:
"twl_i2c_read" [drivers/power/supply/twl6030_charger.ko] undefined!

>
> > +	{ }
> > +};
> > +MODULE_DEVICE_TABLE(of, twl_charger_of_match);
> > +
> > +static struct platform_driver twl6030_charger_driver = {
> > +	.probe = twl6030_charger_probe,
> > +	.driver	= {
> > +		.name	= "twl6030_charger",
> > +		.of_match_table =
> > of_match_ptr(twl_charger_of_match),  
> 
> I propose to drop of_match_ptr and maybe_unused, so this won't be
> restricted only to OF
>
so that more things get compile-tested without OF? But I see no reason
why .probe would be optimized away (and with it a lot more things) by
the compiler.

Regards,
Andreas