linux-kernel - Re: [PATCH v3 7/8] iio: accel: kxcjk-1013: use available_scan

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Date:	Sun, 05 Jul 2015 13:10:26 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Irina Tirdea <irina.tirdea@...el.com>,
	Wolfram Sang <wsa@...-dreams.de>, linux-iio@...r.kernel.org,
	linux-i2c@...r.kernel.org
CC:	linux-kernel@...r.kernel.org,
	Srinivas Pandruvada <srinivas.pandruvada@...el.com>,
	Peter Meerwald <pmeerw@...erw.net>,
	Adriana Reus <adriana.reus@...el.com>
Subject: Re: [PATCH v3 7/8] iio: accel: kxcjk-1013: use available_scan_masks

On 03/07/15 10:33, Irina Tirdea wrote:
> From: Adriana Reus <adriana.reus@...el.com>
> 
> Use available_scan_masks to allow the iio core to select
> the data to send to userspace depending on which axes are
> enabled, instead of doing this in the driver's interrupt
> handler.
> 
> Signed-off-by: Adriana Reus <adriana.reus@...el.com>
> Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
Acked-by: Jonathan Cameron <jic23@...nel.org>
> ---
>  drivers/iio/accel/kxcjk-1013.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
> index 51da369..4960397 100644
> --- a/drivers/iio/accel/kxcjk-1013.c
> +++ b/drivers/iio/accel/kxcjk-1013.c
> @@ -115,6 +115,7 @@ enum kxcjk1013_axis {
>  	AXIS_X,
>  	AXIS_Y,
>  	AXIS_Z,
> +	AXIS_MAX,
>  };
>  
>  enum kxcjk1013_mode {
> @@ -947,6 +948,8 @@ static const struct iio_info kxcjk1013_info = {
>  	.driver_module		= THIS_MODULE,
>  };
>  
> +static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
> +
>  static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
>  {
>  	struct iio_poll_func *pf = p;
> @@ -956,8 +959,7 @@ static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
>  
>  	mutex_lock(&data->mutex);
>  
> -	for_each_set_bit(bit, indio_dev->active_scan_mask,
> -			 indio_dev->masklength) {
> +	for (bit = 0; bit < AXIS_MAX; bit++) {
>  		ret = kxcjk1013_get_acc_reg(data, bit);
>  		if (ret < 0) {
>  			mutex_unlock(&data->mutex);
> @@ -1224,6 +1226,7 @@ static int kxcjk1013_probe(struct i2c_client *client,
>  	indio_dev->dev.parent = &client->dev;
>  	indio_dev->channels = kxcjk1013_channels;
>  	indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
> +	indio_dev->available_scan_masks = kxcjk1013_scan_masks;
>  	indio_dev->name = name;
>  	indio_dev->modes = INDIO_DIRECT_MODE;
>  	indio_dev->info = &kxcjk1013_info;
> 

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