[Outreachy kernel] [PATCH] Fixed IIO_DEVICE_ATTR_NAMED API to take name as a string and added "" around names

[Daniel Baluta]

Hi Himanshi,

On Tue, Sep 12, 2017 at 1:43 AM, Himanshi Jain <himshijain.hj at gmail.com> wrote:
> Fixed IIO_DEVICE_ATTR_NAMED API to take name as a
> string instead of implicit conversion to string using
> preprocessors. Added double quotes around names in
> existing usage of IIO_DEVICE_ATTR_NAMED.

Always use imperative mood in commit subject (Fix instead of Fixed).

The subject should contain a tag, which describes the subsytem/files affected.

I would split this patch into:

1) sysfs: iio: Introduce *_ATTR_NAMED

and explain here why do we need  __ATTR_NAMED and IIO_ATTR_NAMED

2) iio: Use new IIO_DEVICE_ATTR_NAMED API

But of course, lets wait to see Lars and Jonathan's opinions.
thanks,
Daniel.

>
> Signed-off-by: Himanshi Jain <himshijain.hj at gmail.com>
> ---
>  drivers/iio/adc/ad7793.c          | 2 +-
>  drivers/staging/iio/adc/ad7192.c  | 2 +-
>  drivers/staging/iio/adc/ad7280a.c | 4 ++--
>  include/linux/iio/sysfs.h         | 6 +++++-
>  include/linux/sysfs.h             | 7 +++++++
>  5 files changed, 16 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
> index e6706a0..d74e324 100644
> --- a/drivers/iio/adc/ad7793.c
> +++ b/drivers/iio/adc/ad7793.c
> @@ -420,7 +420,7 @@ static ssize_t ad7793_show_scale_available(struct device *dev,
>  }
>
>  static IIO_DEVICE_ATTR_NAMED(in_m_in_scale_available,
> -               in_voltage-voltage_scale_available, S_IRUGO,
> +               "in_voltage-voltage_scale_available", S_IRUGO,
>                 ad7793_show_scale_available, NULL, 0);
>
>  static struct attribute *ad7793_attributes[] = {
> diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c
> index d11c6de..daff38c 100644
> --- a/drivers/staging/iio/adc/ad7192.c
> +++ b/drivers/staging/iio/adc/ad7192.c
> @@ -341,7 +341,7 @@ static int ad7192_setup(struct ad7192_state *st,
>  }
>
>  static IIO_DEVICE_ATTR_NAMED(in_v_m_v_scale_available,
> -                            in_voltage-voltage_scale_available,
> +                            "in_voltage-voltage_scale_available",
>                              0444, ad7192_show_scale_available, NULL, 0);
>
>  static IIO_DEVICE_ATTR(in_voltage_scale_available, 0444,
> diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
> index f85dde9..fd32e9a 100644
> --- a/drivers/staging/iio/adc/ad7280a.c
> +++ b/drivers/staging/iio/adc/ad7280a.c
> @@ -750,14 +750,14 @@ static irqreturn_t ad7280_event_handler(int irq, void *private)
>  }
>
>  static IIO_DEVICE_ATTR_NAMED(in_thresh_low_value,
> -               in_voltage-voltage_thresh_low_value,
> +               "in_voltage-voltage_thresh_low_value",
>                 0644,
>                 ad7280_read_channel_config,
>                 ad7280_write_channel_config,
>                 AD7280A_CELL_UNDERVOLTAGE);
>
>  static IIO_DEVICE_ATTR_NAMED(in_thresh_high_value,
> -               in_voltage-voltage_thresh_high_value,
> +               "in_voltage-voltage_thresh_high_value",
>                 0644,
>                 ad7280_read_channel_config,
>                 ad7280_write_channel_config,
> diff --git a/include/linux/iio/sysfs.h b/include/linux/iio/sysfs.h
> index ce9426c..49c81a4 100644
> --- a/include/linux/iio/sysfs.h
> +++ b/include/linux/iio/sysfs.h
> @@ -55,6 +55,10 @@ struct iio_const_attr {
>         { .dev_attr = __ATTR(_name, _mode, _show, _store),      \
>           .address = _addr }
>
> +#define IIO_ATTR_NAMED(_name, _mode, _show, _store, _addr)             \
> +       { .dev_attr = __ATTR_NAMED(_name, _mode, _show, _store),        \
> +         .address = _addr }
> +
>  #define IIO_ATTR_RO(_name, _addr)       \
>         { .dev_attr = __ATTR_RO(_name), \
>           .address = _addr }
> @@ -85,7 +89,7 @@ struct iio_const_attr {
>
>  #define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
>         struct iio_dev_attr iio_dev_attr_##_vname                       \
> -       = IIO_ATTR(_name, _mode, _show, _store, _addr)
> +       = IIO_ATTR_NAMED(_name, _mode, _show, _store, _addr)
>
>  #define IIO_CONST_ATTR(_name, _string)                                 \
>         struct iio_const_attr iio_const_attr_##_name                    \
> diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
> index aa02c32..20321cf 100644
> --- a/include/linux/sysfs.h
> +++ b/include/linux/sysfs.h
> @@ -104,6 +104,13 @@ struct attribute_group {
>         .store  = _store,                                               \
>  }
>
> +#define __ATTR_NAMED(_name, _mode, _show, _store) {                    \
> +       .attr = {.name = _name,                                         \
> +                .mode = VERIFY_OCTAL_PERMISSIONS(_mode) },             \
> +       .show = _show,                                                  \
> +       .store = _store,                                                \
> +}
> +
>  #define __ATTR_PREALLOC(_name, _mode, _show, _store) {                 \
>         .attr = {.name = __stringify(_name),                            \
>                  .mode = SYSFS_PREALLOC | VERIFY_OCTAL_PERMISSIONS(_mode) },\
> --
> 1.9.1
>
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