linux-kernel - Re: [PATCH 5/9] gpio: vf610: Extend with wakeup support

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Date:	Wed, 24 Sep 2014 18:51:16 +0200
From:	Stefan Agner <stefan@...er.ch>
To:	Lucas Stach <l.stach@...gutronix.de>
Cc:	shawn.guo@...escale.com, kernel@...gutronix.de,
	linus.walleij@...aro.org, gnurou@...il.com, linux@....linux.org.uk,
	jingchang.lu@...escale.com, b20788@...escale.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org
Subject: Re: [PATCH 5/9] gpio: vf610: Extend with wakeup support

Am 2014-09-24 12:06, schrieb Lucas Stach:
> Hi Stefan,
> 
> Am Montag, den 22.09.2014, 19:09 +0200 schrieb Stefan Agner:
>> Support Vybrid GPIO's as wakeup source by requesting the parent
>> IRQ as wakeup IRQ.
>>
>> Signed-off-by: Stefan Agner <stefan@...er.ch>
>> ---
>>  drivers/gpio/gpio-vf610.c | 16 ++++++++++++++++
>>  1 file changed, 16 insertions(+)
>>
>> diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c
>> index 5f59424..50326af 100644
>> --- a/drivers/gpio/gpio-vf610.c
>> +++ b/drivers/gpio/gpio-vf610.c
>> @@ -196,12 +196,28 @@ static void vf610_gpio_irq_unmask(struct irq_data *d)
>>  			  pcr_base);
>>  }
>>
>> +static int vf610_gpio_irq_set_wake(struct irq_data *d, u32 enable)
>> +{
>> +	struct vf610_gpio_port *port = irq_data_get_irq_chip_data(d);
>> +
>> +	if (enable)
>> +		enable_irq_wake(port->irq);
>> +	else
>> +		disable_irq_wake(port->irq);
>> +
>> +	return 0;
>> +}
>> +
>> +
>>  static struct irq_chip vf610_gpio_irq_chip = {
>>  	.name		= "gpio-vf610",
>>  	.irq_ack	= vf610_gpio_irq_ack,
>>  	.irq_mask	= vf610_gpio_irq_mask,
>>  	.irq_unmask	= vf610_gpio_irq_unmask,
>>  	.irq_set_type	= vf610_gpio_irq_set_type,
>> +#ifdef CONFIG_PM_SLEEP
>> +	.irq_set_wake	= vf610_gpio_irq_set_wake,
>> +#endif
> 
> Either you need to get rid of this #ifdef and always assign this
> function or you need to wrap the function itself into the same #ifdef.
> Otherwise you provoke a unused function warning with !CONFIG_PM_SLEEP.
> 
> Given that this function isn't really that big I would argue to just
> drop the #ifdef.
> 

Good point, thx! I will drop the #ifdef when including that patch to the
GPIO driver (as Linus Walleij suggested).

--
Stefan
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