linux-kernel - Re: rx51-battery.ko incompatiblity: board code vs DT

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Date:	Tue, 7 Jul 2015 17:15:47 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Sebastian Reichel <sre@...nel.org>
Cc:	Tony Lindgren <tony@...mide.com>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Pavel Machek <pavel@....cz>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	devicetree@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: rx51-battery.ko incompatiblity: board code vs DT

On Tuesday 07 July 2015 17:02:30 Sebastian Reichel wrote:
> Hi,
> 
> On Mon, Jul 06, 2015 at 09:44:22PM +0200, Pali Rohár wrote:
> > now I found out that rx51-battery.ko driver register sysnode 
> > /sys/class/power_supply/rx51-battery/ when booting with legacy board 
> > code. But when booting DT kernel it register sysnode with different name 
> > /sys/class/power_supply/n900-battery/
> > 
> > Sysfs node for DT kernel comes from Nokia N900 DTS file: 
> > arch/arm/boot/dts/omap3-n900.dts
> > 
> > I would propose change which change DTS to "rx51-battery" to have it 
> > compatible with naming which is for legacy board code. It is just 
> > because to have compatibility and same naming scheme and also to make 
> > existing programs to work without needing patching them.
> > 
> > What do you think?
> 
> Change the driver instead (in rx51_battery_probe):
> 
> -   di->bat.name = dev_name(&pdev->dev);
> +   di->bat.name = "rx51-battery"
> 
> This will keep the DT ABI stable and avoid introducing the term rx51
> in the device tree file.
> 
> -- Sebastian

Perfect, if it works fine can you send & apply patch?

-- 
Pali Rohár
pali.rohar@...il.com
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