[U-Boot] [PATCH 1/2] add generic stubs for GPIO LEDs

[Tom Rini]

On Mon, Aug 24, 2015 at 11:51:46AM +0200, Bernhard Nortmann wrote:
> Hello Simon!
> 
> Am 23.08.2015 23:21, schrieb Simon Glass:
> >Hi Bernard,
> >
> >[...]
> >If this is a new option it should be added to Kconfig. Otherwise:
> >
> >Reviewed-by: Simon Glass <sjg at chromium.org>
> Right. Kconfig wasn't on my agenda, but I agree that it should go in there.
> Unfortunately this points out further problems. The existing CONFIG_GPIO_LED
> is not part of Kconfig, but gets set via board-specific (.h)
> includes. Kconfig
> has/supports CONFIG_LED_GPIO, but that is related to the driver model
> variant, and doesn't affect inclusion of drivers/misc/gpio_led.c ...
> admittedly it's a bit of a mess.
> 
> >I am not a huge fan of the existing API. I would suggest that if you
> >have the energy you could replace it with something like:
> >
> >enum led_colour_t {
> >    led_red,
> >    red_green,
> >    ...
> >};
> >
> >int led_set_on(enum led_colour_t colour, bool on)
> Yes, I've been code-dancing a bit back and forth to get this stuff to fit in
> with the existing API. One reason I have selected these "stub" functions
> is that they are meant to match (and replace) the existing weak definitions
> in arch/arm/lib/board.c. Also, my impression is that they exist as separate
> functions to allow common/cmd_led.c to use them as function pointers,
> namely for the construction of the led_commands[] array.
> 
> The API may not be pretty, but I have in fact tried to keep it as close to
> the original as possible, with the goal of allowing to simply substitute
> GPIO numbers for the "LED bits".
> 
> >BTW there is a device-tree-enabled LED driver node (see drivers/led).
> >It might be worth considering using this on some sunxi boards.
> Thanks! I'll definitely have a look into it.
> (That one is related to the CONFIG_LED_GPIO mentioned above.)

So do you want to do these further clean-ups on top of this series or in
addition to?  Thanks!

-- 
Tom
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