Re: [PATCHv3 5/6] OMAP3: Serial: Made serial to work properly with PRCM chain handler

[Tony Lindgren <tony@atomide.com>]

* Tero Kristo <t-kristo@ti.com> [110623 02:06]:
> On Thu, 2011-06-23 at 10:21 +0200, Tony Lindgren wrote:
> > * Tero Kristo <t-kristo@ti.com> [110622 09:38]:
> > > @@ -550,6 +550,8 @@ static void omap_uart_idle_init(struct omap_uart_state *uart)
> > >  	ret = request_threaded_irq(uart->irq, NULL, omap_uart_interrupt,
> > >  				   IRQF_SHARED, "serial idle", (void *)uart);
> > >  	WARN_ON(ret);
> > > +	ret = omap_prcm_register_pad_irq(uart->padconf, uart->irq);
> > > +	WARN_ON(ret);
> > >  }
> > 
> > Argh, looks like we still have direct mux register tinkering in serial.c:
> > 
> > $ grep "padconf = 0x" serial.c
> >                         padconf = 0x182;
> >                         padconf = 0x17a;
> >                         padconf = 0x19e;
> >                         padconf = 0x0d2;
> > 
> > By deducting 0x30 from the values above, these map into the following mux defines:
> > 
> > $ grep RX_OFFSET mux34xx.h
> > #define OMAP3_CONTROL_PADCONF_UART2_RX_OFFSET                   0x14a
> > #define OMAP3_CONTROL_PADCONF_UART1_RX_OFFSET                   0x152
> > #define OMAP3_CONTROL_PADCONF_UART3_RX_IRRX_OFFSET              0x16e
> > 
> > So you can make things more generic by getting rid of those and using
> > struct omap_mux_partition instead for omap_prcm_register_pad_irq.
> > The pins used are set already in serial.c with omap_hwmod_mux_init.
> > 
> > Otherwise we have to patch the hardcoded padconf values for every new omap.
> > And looks like we're already missing them for 44xx in serial.c.
> > 
> > Then access to the padconf registers should be done with
> > omap_mux_read/write instead. If you need to do something more complex
> > with them maybe consider adding some new functions to mux.c as needed.
> > 
> 
> Padconf stuff is not that much related to this patch set yet (I am not
> touching the serial padconf code), but I can probably take a look at
> this also later on, unless you want this fixed with this set already?

Yes please, maybe make it a separate patch before your series to
prepare things?

Otherwise we will have to change the omap_prcm_register_pad_irq
later on in each driver using it.

Tony