[PATCH RESEND] iio: accel: bcm150: Remove handling for regmap raw_read_max

[PATCH RESEND] iio: accel: bcm150: Remove handling for regmap raw_read_max

[Charles Keepax]

The regmap core now handles splitting up transactions according to
max_raw_read, so this code is no longer required in client drivers.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---

The necessary changes to support this are available in Linus's tree now.

Thanks,
Charles

 drivers/iio/accel/bmc150-accel-core.c | 23 +++--------------------
 1 file changed, 3 insertions(+), 20 deletions(-)

diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
index 208f2d9f0e8a..383c802eb5b8 100644
--- a/drivers/iio/accel/bmc150-accel-core.c
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -837,29 +837,12 @@ static int bmc150_accel_fifo_transfer(struct bmc150_accel_data *data,
 	int sample_length = 3 * 2;
 	int ret;
 	int total_length = samples * sample_length;
-	int i;
-	size_t step = regmap_get_raw_read_max(data->regmap);
-
-	if (!step || step > total_length)
-		step = total_length;
-	else if (step < total_length)
-		step = sample_length;
-
-	/*
-	 * Seems we have a bus with size limitation so we have to execute
-	 * multiple reads
-	 */
-	for (i = 0; i < total_length; i += step) {
-		ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA,
-				      &buffer[i], step);
-		if (ret)
-			break;
-	}
 
+	ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA,
+			      buffer, total_length);
 	if (ret)
 		dev_err(dev,
-			"Error transferring data from fifo in single steps of %zu\n",
-			step);
+			"Error transferring data from fifo: %d\n", ret);
 
 	return ret;
 }
-- 
2.11.0

Re: [PATCH RESEND] iio: accel: bcm150: Remove handling for regmap raw_read_max

[Jonathan Cameron]

On Tue, 24 Apr 2018 16:05:51 +0100
Charles Keepax <ckeepax@opensource.cirrus.com> wrote:

> The regmap core now handles splitting up transactions according to
> max_raw_read, so this code is no longer required in client drivers.
> 
> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Applied to the togreg branch of iio.git and pushed out as testing
for the autobuilders to play with it.

Thanks,

Jonathan

> ---
> 
> The necessary changes to support this are available in Linus's tree now.
> 
> Thanks,
> Charles
> 
>  drivers/iio/accel/bmc150-accel-core.c | 23 +++--------------------
>  1 file changed, 3 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
> index 208f2d9f0e8a..383c802eb5b8 100644
> --- a/drivers/iio/accel/bmc150-accel-core.c
> +++ b/drivers/iio/accel/bmc150-accel-core.c
> @@ -837,29 +837,12 @@ static int bmc150_accel_fifo_transfer(struct bmc150_accel_data *data,
>  	int sample_length = 3 * 2;
>  	int ret;
>  	int total_length = samples * sample_length;
> -	int i;
> -	size_t step = regmap_get_raw_read_max(data->regmap);
> -
> -	if (!step || step > total_length)
> -		step = total_length;
> -	else if (step < total_length)
> -		step = sample_length;
> -
> -	/*
> -	 * Seems we have a bus with size limitation so we have to execute
> -	 * multiple reads
> -	 */
> -	for (i = 0; i < total_length; i += step) {
> -		ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA,
> -				      &buffer[i], step);
> -		if (ret)
> -			break;
> -	}
>  
> +	ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA,
> +			      buffer, total_length);
>  	if (ret)
>  		dev_err(dev,
> -			"Error transferring data from fifo in single steps of %zu\n",
> -			step);
> +			"Error transferring data from fifo: %d\n", ret);
>  
>  	return ret;
>  }