linux-kernel - Re: [PATCH v20 2/3] Input: mt6779-keypad

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Message-ID: <YfK4UcuCfF7JfI7H@smile.fi.intel.com>
Date:   Thu, 27 Jan 2022 17:20:49 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Mattijs Korpershoek <mkorpershoek@...libre.com>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Marco Felsch <m.felsch@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Fengping Yu <fengping.yu@...iatek.com>,
        Yingjoe Chen <yingjoe.chen@...iatek.com>,
        Fabien Parent <fparent@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v20 2/3] Input: mt6779-keypad - Add MediaTek keypad driver

On Thu, Jan 27, 2022 at 12:15:25PM +0100, Mattijs Korpershoek wrote:
> From: "fengping.yu" <fengping.yu@...iatek.com>
> 
> This patch adds matrix keypad support for Mediatek SoCs.

Some comments which may be addressed now or in the follow-up patch(es).
Up to you.

...

> +static const struct regmap_config mt6779_keypad_regmap_cfg = {
> +	.reg_bits = 32,
> +	.val_bits = 32,

> +	.reg_stride = sizeof(u32),

I'm wondering if we need this when we have reg_bits = 32 already.

> +	.max_register = 36,
> +};

...

> +	regmap_write(keypad->regmap, MTK_KPD_DEBOUNCE,
> +		     (debounce * 32) & MTK_KPD_DEBOUNCE_MASK);

I'm wondering if << 5 is more specific to show that the value
is based on 2^5 units.

...

> +	error = devm_add_action_or_reset(&pdev->dev, mt6779_keypad_clk_disable, keypad->clk);

You have this long line...

> +	error = devm_request_threaded_irq(&pdev->dev, irq,
> +					  NULL, mt6779_keypad_irq_handler,
> +					  IRQF_ONESHOT,
> +					  MTK_KPD_NAME, keypad);

...at the same time you may reduce LOCs here...

> +	if (error) {
> +		dev_err(&pdev->dev, "Failed to request IRQ#%d:%d\n",
> +			irq, error);

...and here.

> +		return error;
> +	}

-- 
With Best Regards,
Andy Shevchenko