linux-kernel - Re: [PATCH v2 3/3] Input: omap-keypad: Set irq to level instead of edge

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Date:	Sat, 27 Jul 2013 20:07:09 +0300
From:	Felipe Balbi <balbi@...com>
To:	Illia Smyrnov <illia.smyrnov@...com>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	<linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>
Subject: Re: [PATCH v2 3/3] Input: omap-keypad: Set irq to level instead of
 edge

Hi,

On Fri, Jul 26, 2013 at 08:09:06PM +0300, Illia Smyrnov wrote:
> From: Axel Haslam <axelhaslam@...com>
> 
> Set mpu irq to level instead of edge, since if mpu is in low power
> an edge detection may be lost if the event is a wkup event.
> 
> Signed-off-by: Axel Haslam <axelhaslam@...com>
> Signed-off-by: Illia Smyrnov <illia.smyrnov@...com>
> ---
>  Based on top of v3.11-rc2
> 
>  Depends on:
>  Input: omap-keypad: Convert to threaded IRQ
>  https://patchwork.kernel.org/patch/2832920/
> 
>  drivers/input/keyboard/omap4-keypad.c |    6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/input/keyboard/omap4-keypad.c b/drivers/input/keyboard/omap4-keypad.c
> index e8bdc76..7adb53e 100644
> --- a/drivers/input/keyboard/omap4-keypad.c
> +++ b/drivers/input/keyboard/omap4-keypad.c
> @@ -374,9 +374,13 @@ static int omap4_keypad_probe(struct platform_device *pdev)
>  		goto err_free_keymap;
>  	}
>  
> +	/*
> +	 * Set irq level detection for mpu. Edge event are missed in gic
> +	 * if the mpu is in low power and keypad event is a wakeup
> +	 */
>  	error = request_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler,
>  				     omap4_keypad_irq_thread_fn,
> -				     IRQF_TRIGGER_RISING,
> +				     IRQF_TRIGGER_HIGH,

omap4 is DT-only, why don't you pass zero here and expect DT to setup
IRQ type correctly for you ?

-- 
balbi

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