Re: [PATCH 4/4] leds: flash: mt6360: Add mt6360 isnk channel hardwre breath mode support

[Matti Vaittinen]

Hi ChiYuan!

On Thu, Apr 28, 2022 at 1:03 PM cy_huang <u0084500@xxxxxxxxx> wrote:
> From: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
>
> Add mt6360 isnk channel hardware breath mode support.
>
> Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
>
> +static int mt6360_gen_breath_reg_config(struct led_pattern *pattern, u32 len,
> +                                       u8 *vals, int val_len)
> +{
> +       static const struct linear_range tranges[MT6360_ILED_RANGE_MAX] = {
> +               { 125, 0, 15, 250 }, /* tr/f12 and ton, unit: millisecond */
> +               { 250, 0, 15, 500 }, /* toff, unit: millisecond */
> +       };

It's nice to see you are using the linear_ranges helpers here! Just a
minor remark - do you think you could use field names in linear_ranges
initializations? That would make it less likely the driver breaks if
someone changes the struct linear_range definition. Eg, use something
like:

static const struct linear_range tranges[MT6360_ILED_RANGE_MAX] = {
        /* tr/f12 and ton, unit: millisecond */
        { .min = 125, .min_sel = 0, .max_sel = 15, .step = 250 },
        /* toff, unit: millisecond */
        { .min = 250, .min_sel = 0, .max_sel = 15, .step = 500 },
};

Do you think that would work?

Best Regards
-- Matti

-- 

Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland

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