[U-Boot] [PATCH 4/6] tegra: Add support for UART init in cpu board.c

[Mike Frysinger <vapier@gentoo.org>]

On Monday 28 November 2011 15:14:40 Simon Glass wrote:
> On Wed, Nov 23, 2011 at 3:40 PM, Mike Frysinger wrote:
> > On Wednesday 23 November 2011 17:59:06 Simon Glass wrote:
> >> +     int i;
> > 
> > size_t
> 
> Ick. OK.

why ick ? :)

> >> +     for (i = 0; i < UART_COUNT; i++) {
> > 
> > ... and then did ARRAY_SIZE(id_for_uart) ?
> > 
> >> +void board_init_uart_f(void)
> >> +{
> >> +     int uart_ids = 0;       /* bit mask of which UART ids to enable */
> >> +
> >> +#ifdef CONFIG_TEGRA2_ENABLE_UARTA
> >> +     uart_ids |= UARTA;
> >> +#endif
> >> +#ifdef CONFIG_TEGRA2_ENABLE_UARTB
> >> +     uart_ids |= UARTB;
> >> +#endif
> >> +#ifdef CONFIG_TEGRA2_ENABLE_UARTD
> >> +     uart_ids |= UARTD;
> >> +#endif
> >> +     setup_uarts(uart_ids);
> >> +}
> > 
> > we added a func in the Blackfin pinmux API where you could pass it a list
> > of peripherals to mux.  so you could do:
> >        static const unsigned pin_list[] = {
> >        #ifdef CONFIG_TEGRA2_ENABLE_UARTA
> >                UART1,
> >        #endif
> >                0,
> >        };
> >        pinmux_request_list(pin_list);
> > 
> > and the list version would just walk the 0-terminated array calling
> > pinmux_request() automatically
> 
> Well yes, but funcmux isn't about pins, it's about whole functions. We
> could provide a new function to enable a list of functions, but for
> now there really wouldn't be any callers. UART1 is just our own number
> - the callee requires a peripheral ID.

the Blackfin API is given an ID that encodes both the requested function and 
the pin.  i meant doing that instead of bit packing and unpacking ids that 
later get expanded.

although with the pinmux framework getting merged into Linux, this is probably 
now a moot point.  stick with whatever you have working as it'll all get 
thrown out once we migrate to that in u-boot :).
-mike
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