linux-kernel - Re: [PATCH 2/2] input: touchscreen mc13xxx: Add mc34708 support

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Date:   Wed, 11 Apr 2018 09:01:01 -0700
From:   Joe Perches <joe@...ches.com>
To:     Lukasz Majewski <lukma@...x.de>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        Sascha Hauer <s.hauer@...gutronix.de>
Subject: Re: [PATCH 2/2] input: touchscreen mc13xxx: Add mc34708 support

On Wed, 2018-04-11 at 16:13 +0200, Lukasz Majewski wrote:
> From: Sascha Hauer <s.hauer@...gutronix.de>
> 
> The mc34708 has a different bit to enable pen detection. This
> adds the driver data and devtype necessary to probe the device
> and to distinguish between the mc13783 and the mc34708.

style trivia:

> diff --git a/drivers/input/touchscreen/mc13783_ts.c b/drivers/input/touchscreen/mc13783_ts.c
[]
> @@ -96,6 +135,10 @@ static void mc13783_ts_report_sample(struct mc13783_ts_priv *priv)
>  
>  	cr0 = (cr0 + cr1) / 2;
>  
> +	if (priv->drvdata->type == MC13XXX_TYPE_MC34708)
> +		if (cr0 > 4080)
> +			cr0 = 0;

For easy of reading, this multiple if block should either
use braces around the first if like:

	if (foo) {
		if (bar)
			single_statement;
	}

or be written

	if (foo && bar)
		single_statement;

I generally prefer the latter style.