Re: [PATCH v6 12/13] leds: flash: mt6370: Add MediaTek MT6370 flashlight support

[Andy Shevchenko]

On Fri, Jul 22, 2022 at 12:25 PM ChiaEn Wu <peterwu.pub@xxxxxxxxx> wrote:

Forgot to add a couple of things...

...

> +#define MT6370_ITORCH_MIN_UA           25000
> +#define MT6370_ITORCH_STEP_UA          12500
> +#define MT6370_ITORCH_MAX_UA           400000
> +#define MT6370_ITORCH_DOUBLE_MAX_UA    800000
> +#define MT6370_ISTRB_MIN_UA            50000
> +#define MT6370_ISTRB_STEP_UA           12500
> +#define MT6370_ISTRB_MAX_UA            1500000
> +#define MT6370_ISTRB_DOUBLE_MAX_UA     3000000

Perhaps _uA would be better and consistent across your series
regarding current units.

...

> +       /*
> +        * For the flash to turn on/off, need to wait HW ramping up/down time

we need

> +        * 5ms/500us to prevent the unexpected problem.
> +        */
> +       if (!prev && curr)
> +               usleep_range(5000, 6000);
> +       else if (prev && !curr)
> +               udelay(500);

This still remains unanswered, why in the first place we allow
switching, and a busy loop in the other place?

-- 
With Best Regards,
Andy Shevchenko