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From: Jonathan Cameron <jic23@jic23.retrosnub.co.uk>
To: Alexandru Ardelean <alexandru.ardelean@analog.com>
Cc: <linux-iio@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<gregkh@linuxfoundation.org>, <andriy.shevchenko@linux.intel.com>,
	<namhyung@kernel.org>, <mingo@kernel.org>,
	Lars-Peter Clausen <lars@metafoo.de>
Subject: Re: [PATCH 2/2] iio: Handle enumerated properties with gaps
Date: Mon, 22 Apr 2019 11:38:35 +0100	[thread overview]
Message-ID: <20190422113835.445b3acd@archlinux> (raw)
In-Reply-To: <20190422083257.21805-2-alexandru.ardelean@analog.com>

On Mon, 22 Apr 2019 11:32:57 +0300
Alexandru Ardelean <alexandru.ardelean@analog.com> wrote:

> From: Lars-Peter Clausen <lars@metafoo.de>
> 
> Some enums might have gaps or reserved values in the middle of their value
> range. E.g. consider a 2-bit enum where the values 0, 1 and 3 have a
> meaning, but 2 is a reserved value and can not be used.
> 
> Add support for such enums to the IIO enum helper functions. A reserved
> values is marked by setting its entry in the items array to NULL rather
> than the normal descriptive string value.
> 
> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Looks good, subject to the whole gaps parameter discussion on patch
1.

Thanks,

Jonathan

> ---
>  drivers/iio/industrialio-core.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index f2ebca65f964..c141a29bf446 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -447,8 +447,11 @@ ssize_t iio_enum_available_read(struct iio_dev *indio_dev,
>  	if (!e->num_items)
>  		return 0;
>  
> -	for (i = 0; i < e->num_items; ++i)
> +	for (i = 0; i < e->num_items; ++i) {
> +		if (!e->items[i])
> +			continue;
>  		len += scnprintf(buf + len, PAGE_SIZE - len, "%s ", e->items[i]);
> +	}
>  
>  	/* replace last space with a newline */
>  	buf[len - 1] = '\n';
> @@ -469,7 +472,7 @@ ssize_t iio_enum_read(struct iio_dev *indio_dev,
>  	i = e->get(indio_dev, chan);
>  	if (i < 0)
>  		return i;
> -	else if (i >= e->num_items)
> +	else if (i >= e->num_items || !e->items[i])
>  		return -EINVAL;
>  
>  	return snprintf(buf, PAGE_SIZE, "%s\n", e->items[i]);
> @@ -486,7 +489,8 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev,
>  	if (!e->set)
>  		return -EINVAL;
>  
> -	ret = __sysfs_match_string(e->items, e->num_items, buf);
> +	ret = __sysfs_match_string_with_gaps(e->items, e->num_items,
> +					     buf, true);
>  	if (ret < 0)
>  		return ret;
>  


  reply	other threads:[~2019-04-22 10:38 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-22  8:32 [PATCH 1/2] lib: add __sysfs_match_string_with_gaps() helper Alexandru Ardelean
2019-04-22  8:32 ` [PATCH 2/2] iio: Handle enumerated properties with gaps Alexandru Ardelean
2019-04-22 10:38   ` Jonathan Cameron [this message]
2019-04-22 14:03   ` [PATCH 2/2][V2] " Alexandru Ardelean
2019-04-22 10:37 ` [PATCH 1/2] lib: add __sysfs_match_string_with_gaps() helper Jonathan Cameron
2019-04-22 11:16   ` Ardelean, Alexandru
2019-04-22 14:02 ` [PATCH 1/2][V2] " Alexandru Ardelean
2019-04-22 21:06 ` [PATCH 1/2] " Greg KH
2019-04-23  6:38   ` Ardelean, Alexandru
2019-04-24 12:34     ` Jonathan Cameron
2019-04-25 19:37       ` gregkh
2019-04-26  9:29         ` Alexandru Ardelean
2019-04-26 14:27           ` andriy.shevchenko
2019-05-06 13:45             ` Alexandru Ardelean
2019-05-06 14:46               ` andriy.shevchenko
2019-05-08 11:34                 ` Ardelean, Alexandru

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