linux-kernel - Re: [PATCH v1] input: make use of the input_set

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Date:	Wed, 07 Jan 2015 09:19:28 +0100
From:	Olliver Schinagl <oliver@...inagl.nl>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Olliver Schinagl <oliver+list@...inagl.nl>
CC:	Wolfram Sang <wsa@...-dreams.de>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Jingoo Han <jg1.han@...sung.com>,
	"David S. Miller" <davem@...emloft.net>,
	Sam Ravnborg <sam@...nborg.org>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] input: make use of the input_set_capability helper

Hey Dmitry,

On 07-01-15 08:57, Dmitry Torokhov wrote:
> Hi Olliver,
>
> On Wed, Jan 07, 2015 at 08:31:06AM +0100, Olliver Schinagl wrote:
>> From: Olliver Schinagl <oliver@...inagl.nl>
>>
>> Almost all of the speaker drivers under input manipulate the ev bits
>> directly, which is not needed, as there is a helper available.
>>
>> This patch makes use of the helper for the speaker drivers.
>>
>> Signed-off-by: Olliver Schinagl <oliver@...inagl.nl>
>> ---
>>   drivers/input/misc/cm109.c         | 4 ++--
>>   drivers/input/misc/ixp4xx-beeper.c | 5 ++---
>>   drivers/input/misc/m68kspkr.c      | 5 ++---
>>   drivers/input/misc/pcspkr.c        | 5 ++---
>>   drivers/input/misc/pwm-beeper.c    | 5 +----
>>   drivers/input/misc/sparcspkr.c     | 6 ++----
>>   6 files changed, 11 insertions(+), 19 deletions(-)
>>
>> diff --git a/drivers/input/misc/cm109.c b/drivers/input/misc/cm109.c
>> index 9365535..8e41070 100644
>> --- a/drivers/input/misc/cm109.c
>> +++ b/drivers/input/misc/cm109.c
>> @@ -767,10 +767,10 @@ static int cm109_usb_probe(struct usb_interface *intf,
>>   	input_dev->keycodesize = sizeof(unsigned char);
>>   	input_dev->keycodemax = ARRAY_SIZE(dev->keymap);
>>   
>> -	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_SND);
>> -	input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
>> +	input_set_capability(input_dev, EV_SND, SND_BELL | SND_TONE);
> No, input_set_capability() takes single event code, not bitmask. The
> fact that it works for these 2 values of SND events is pure coincidence
> (the old code wasn't much better though).
What do you suggest we should do then? Fix input_set_capability to take 
bit masks? or multiline events?
I'm not sure why __set_bits() wouldn't work for bitmasks, could you 
educate me?
>
>>   
>>   	/* register available key events */
>> +	input_dev->evbit[0] = BIT_MASK(EV_KEY);
> Would prefer __set_bit(EV_KEY, input_dev->evbit); here instead.
I only moved the EV_KEY bit from above to its appropiate place here. I 
can change this one (and others) to use __set_bit() for now for v2?

Olliver
>
> Thanks.
>

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