linux-kernel - Re: [PATCH 2/3] cap1106: support for active-high interrupt option

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Date:	Sun, 21 Sep 2014 12:06:30 +0200
From:	Daniel Mack <daniel@...que.org>
To:	Matt Ranostay <mranostay@...il.com>, galak@...eaurora.org,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	dmitry.torokhov@...il.com, robh+dt@...nel.org
CC:	devicetree@...r.kernel.org
Subject: Re: [PATCH 2/3] cap1106: support for active-high interrupt option

On 09/21/2014 05:01 AM, Matt Ranostay wrote:
> Some applications need to use the active-high push-pull interrupt
> option. This allows it be enabled in the device tree child node.
> 
> Signed-off-by: Matt Ranostay <mranostay@...il.com>
> ---
>  drivers/input/keyboard/cap1106.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/input/keyboard/cap1106.c b/drivers/input/keyboard/cap1106.c
> index b9c43b5..33e2590 100644
> --- a/drivers/input/keyboard/cap1106.c
> +++ b/drivers/input/keyboard/cap1106.c
> @@ -234,6 +234,12 @@ static int cap1106_i2c_probe(struct i2c_client *i2c_client,
>  			dev_err(dev, "Invalid sensor-gain value %d\n", gain32);
>  	}
>  
> +	if (of_property_read_bool(node, "microchip,active-high")) {

I think the name of that property should make clear it's only changing
the interrupt output driver configuration. What about
"microchip,irq-active-high"?

Also, patch 3/3, which documents this new property, can be squashed into
this one.

> +		error = regmap_write(priv->regmap, CAP1106_REG_CONFIG2, 0);

This register controls a lot more details than that. Overriding it with
0 doesn't seem right. Please use regmap_update_bits() to just update
ALT_POL, and also add a #define for it, so the next reader knows what
the code is doing :)


Thanks,
Daniel

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