linux-kernel - Re: [PATCH 1/1 Re] drivers: add lcd display support

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Date:	Wed, 20 Sep 2006 00:08:22 +0200
From:	"Miguel Ojeda" <maxextreme@...il.com>
To:	"Pavel Machek" <pavel@....cz>
Cc:	torvalds@...l.org, akpm@...l.org, alan@...rguk.ukuu.org.uk,
	greg@...ah.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1 Re] drivers: add lcd display support

Ack, thank you for your review!

On 9/19/06, Pavel Machek <pavel@....cz> wrote:
> Hi!
>
> > Please tell me if you agree.
> >
> > Adds LCD Display support.
> > Adds ks0108 LCD controller support.
> > Adds cfag12864b LCD display support.
> >
> > Signed-off-by: Miguel Ojeda Sandonis <maxextreme@...il.com>
>
>
> > diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/drivers/lcddisplay/cfag12864b.c linux-2.6.18-rc7/drivers/lcddisplay/cfag12864b.c
> > --- linux-2.6.18-rc7-vanilla/drivers/lcddisplay/cfag12864b.c  1970-01-01 01:00:00.000000000 +0100
> > +++ linux-2.6.18-rc7/drivers/lcddisplay/cfag12864b.c  2006-09-13 05:03:29.000000000 +0200
> > @@ -0,0 +1,558 @@
> > +/*
> > + *    Filename: cfag12864b.c
> > + *     Version: 0.1.0
> > + * Description: cfag12864b LCD Display Driver
> > + *     License: GPL
>
> v2 or v2 and later?
>
> > +static const unsigned int cfag12864b_firstminor = 0;
>
> No need to initialize to zero.
>
> > +static const unsigned int cfag12864b_ndevices = 1;
> > +static const char * cfag12864b_name = NAME;
>                       ~- kill this space.
>
> > +#define bit(n) ((unsigned char)(1<<(n)))
> > +#define nobit(n) ((unsigned char)(~bit(n)))
>
> Uh? We have generic functions for this.
>
> > +static unsigned char cfag12864b_state = 0;
>
> No zeros.
>
> > +static void cfag12864b_e(unsigned char state)
> > +{
> > +     if(state)
>           ~ missing space.
>
> > +             cfag12864b_state |= bit(0);
> > +     else
> > +             cfag12864b_state &= nobit(0);
> > +     cfag12864b_set();
>
> This repeats few times, perhaps you could create helper for that?
> > +static void cfag12864b_secondcontroller(unsigned char state)
> > +{
> > +     if(state)
> > +             cfag12864b_cs2(0);
> > +     else
> > +             cfag12864b_cs2(1);
> > +}
>
> Is this needed?
>
> > +             /*if(address != tmpaddress) {
> > +                     address = tmpaddress;
> > +                     cfag12864b_address(address);
> > +                     cfag12864b_nop();
> > +             }*/
> > +
> > +             /*if(tmpcontroller == 0) {
> > +                     if(address != tmpaddress) {
> > +                             address = tmpaddress;
> > +                             cfag12864b_address(address);
> > +                     }
> > +             }
> > +             else {
> > +                     cfag12864b_address(tmpaddress);
> > +                     cfag12864b_nop();
> > +             }*/
>
> Remove unused code, do not comment it out.
>                                                                 Pavel
> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
>
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