linux-kernel - Re: [PATCH 4/4] power_supply: bump EC version check that we refuse to run with in olpc

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Message-ID: <20080430191206.3a7a4fde@ephemeral>
Date:	Wed, 30 Apr 2008 19:12:06 -0400
From:	Andres Salomon <dilinger@...ued.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	cbou@...l.ru, linux-kernel@...r.kernel.org, dwmw2@...radead.org
Subject: Re: [PATCH 4/4] power_supply: bump EC version check that we refuse
 to run with in olpc_battery

On Wed, 30 Apr 2008 14:55:15 -0700
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Wed, 30 Apr 2008 16:30:30 -0400
> Andres Salomon <dilinger@...ued.net> wrote:
> 
> > 
> > Refuse to run with an EC < 0x44.  We're playing it safe, and this is
> > a pretty old EC version.
> > 
> > Also, add a comment about why we're checking the EC version.
> 
> Sigh.  Presantly, the entirety of olpc_battery.c looks very nice
> in an 80-column display.
> 
> > 
> > diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
> > index cb45a67..086b146 100644
> > --- a/drivers/power/olpc_battery.c
> > +++ b/drivers/power/olpc_battery.c
> > @@ -398,7 +398,12 @@ static int __init olpc_bat_init(void)
> >  
> >  	if (!olpc_platform_info.ecver)
> >  		return -ENXIO;
> > -	if (olpc_platform_info.ecver < 0x43) {
> > +
> > +	/*
> > +	 * We've seen a number of EC protocol changes; this driver requires
> > +	 * the latest EC protocol, supported by 0x44 and above.
> > +	 */
> > +	if (olpc_platform_info.ecver < 0x44) {
> >  		printk(KERN_NOTICE "OLPC EC version 0x%02x too old for battery driver.\n", olpc_platform_info.ecver);
> >  		return -ENXIO;
> 
> Now it needs 0x80 :(


You can fight dwmw2 on that one, I'm keeping out of such battles.  :)

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