Re: staging: media: lirc: lirc_zilog.c: replace custom print macros with dev_* and pr_*

[Sean Young <sean@mess.org>]

On Thu, Nov 06, 2014 at 11:05:49AM -0200, Mauro Carvalho Chehab wrote:
> Hi Sean,
> 
> Em Thu, 06 Nov 2014 12:46:29 +0000
> Sean Young <sean@mess.org> escreveu:
> 
> > On Fri, Oct 31, 2014 at 05:35:41PM +0300, Dan Carpenter wrote:
> > > On Fri, Oct 31, 2014 at 04:26:45PM +0200, Aya Mahfouz wrote:
> > > > On Fri, Oct 31, 2014 at 04:06:00PM +0300, Dan Carpenter wrote:
> > > > > drivers/staging/media/lirc/lirc_zilog.c
> > > > >   1333  /* Close the IR device */
> > > > >   1334  static int close(struct inode *node, struct file *filep)
> > > > >   1335  {
> > > > >   1336          /* find our IR struct */
> > > > >   1337          struct IR *ir = filep->private_data;
> > > > >   1338  
> > > > >   1339          if (ir == NULL) {
> > > > >                     ^^^^^^^^^^
> > > > >   1340                  dev_err(ir->l.dev, "close: no private_data attached to the file!\n");
> > > > >                                 ^^^^^^^^^
> > > > > 
> > > > > I suggest you just delete the error message.  Can "ir" actually be NULL
> > > > > here anyway?
> > > > >
> > > > 
> > > > Since I'm a newbie and this is not my code, I prefer to use pr_err().
> > > 
> > > This driver doesn't belong to anyone.  Go ahead and take ownership.  The
> > > message is fairly worthless and no one will miss it.
> > 
> > Speaking of ownership, what this driver really needs is to be ported to 
> > rc-core. In order to do this it'll need to be able to send raw IR rather
> > key codes; I've been peering at the firmware but it neither looks like
> > zilog z8 opcodes nor space/pulse information.
> 
> Actually, I think that all features provided by this driver were already
> migrated into the ir-kbd-i2c (drivers/media/i2c/ir-kbd-i2c.c) driver.

All the features for the IR receiver are implemented (very nicely) in
ir-kbd-i2c (the ir_rx_z8f0811_haup and ir_rx_z8f0811_hdpvr i2c drivers).

However the IR emitter (i2c driver ir_tx_z8f0811_haup and 
ir_tx_z8f0811_hdpvr) are not implemented there. I wanted to port the 
IR emitter but the driver can only send specific rc5 (IIRC) keycodes, not
raw IR. So I cannot port it.

> Andy and Jarod worked on this conversion, but we decided, on that time,
> to keep lirc_zilog for a while (can't remember why).
> 
> Andy/Jarod,
> 
> What's the status of the ir-kbd-i2c with regards to Zilog z8 support?

Transmitter side.

> > Does anyone have any contacts at Hauppauge who could help with this?
> 
> Probably, it won't be easy to get someone there that worked on it,
> as this device is too old.
> 
> Anyway, if are there anything still pending, I may be able to get
> some contacts at the vendor.

That would be great, I have hardware and I'm happy to re-write the
driver.

Thanks

Sean