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SubjectRe: [PATCHv4 08/10] backlight: add TI LMU backlight driver
Hi!

> +enum ti_lmu_bl_type {
> + TI_LMU_BL, /* backlight userspace interface */
> + TI_LMU_LED, /* led userspace interface */
> +};
...
> +static int ti_lmu_bl_add_device(struct ti_lmu_bank *lmu_bank)
> +{
> + switch (lmu_bank->type) {
> + case TI_LMU_BL:
> + return ti_lmu_bl_register_backlight(lmu_bank);
> + case TI_LMU_LED:
> + return ti_lmu_bl_register_led(lmu_bank);
> + default:
> + return -EINVAL;
> + }
> +}

Ok, this is somehow unusual/crazy. Single driver with two interfaces.

Do we need the LED interface for something?

If yes, I believe reasonable solution would be to always provide LED
interface, and then have "backlight-trigger" which that would provide
backlight interface for arbitrary LED.

Thanks,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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