linux-kernel - Re: [PATCH 2/5] [input] add mc13783 touchscreen driver

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Date:	Wed, 12 Aug 2009 09:04:38 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Sascha Hauer <s.hauer@...gutronix.de>
Cc:	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-input@...r.kernel.org
Subject: Re: [PATCH 2/5] [input] add mc13783 touchscreen driver

On Wed, Aug 12, 2009 at 05:05:28PM +0200, Sascha Hauer wrote:
> This driver provides support for the touchscreen interface
> integrated into the Freescale MC13783.
> 
> changes since v1:
> 
> - remove unused functions
> - use queue_delayed_work instead of queue_work
> - report pen events as BTN_TOUCH instead of ABS_PRESSURE
> - handle interrupt registration in open/close functions
> - do not call input_free_device() on already registered
>   input_device
> - use platform_driver_probe instead of platform_driver_register

BTW, if you are using platform_driver_probe() then __init is OK for
.probe() because all probes will only be run once, when driver loads.
IIRC the ability to discard probe() code was the main reason for
introducing platform_driver_probe().

> +
> +	/* unmask the ts wakeup interrupt */
> +	mc13783_set_bits(priv->mc13783, MC13783_REG_INTERRUPT_MASK_0,
> +			MC13783_INT_MASK_TSM, 0);
> +
> +	mc13783_adc_set_ts_status(priv->mc13783, 1);
> +

I actually expected these bits to go into ->open(); not the request IRQ
stuff...

-- 
Dmitry
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