Re: [PATCH v12 07/17] counter: Update counter.h comments to reflect sysfs internalization

[David Lechner <david@lechnology.com>]

On 7/5/21 3:18 AM, William Breathitt Gray wrote:
> The Counter subsystem architecture and driver implementations have
> changed in order to handle Counter sysfs interactions in a more
> consistent way. This patch updates the Generic Counter interface
> header file comments to reflect the changes.
> 
> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
> ---
>   drivers/counter/counter-core.c |  3 +++
>   include/linux/counter.h        | 43 ++++++++++++++++------------------
>   2 files changed, 23 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/counter/counter-core.c b/drivers/counter/counter-core.c
> index 15f735ef296e..9442e3b91468 100644
> --- a/drivers/counter/counter-core.c
> +++ b/drivers/counter/counter-core.c
> @@ -41,6 +41,9 @@ static struct bus_type counter_bus_type = {
>    * This function registers a Counter to the system. A sysfs "counter" directory
>    * will be created and populated with sysfs attributes correlating with the
>    * Counter Signals, Synapses, and Counts respectively.
> + *
> + * RETURNS:
> + * 0 on success, negative error number on failure.
>    */
>   int counter_register(struct counter_device *const counter)
>   {
> diff --git a/include/linux/counter.h b/include/linux/counter.h
> index b69277f5c4c5..e7fd6d81a929 100644
> --- a/include/linux/counter.h
> +++ b/include/linux/counter.h
> @@ -188,11 +188,10 @@ struct counter_comp {
>   
>   /**
>    * struct counter_signal - Counter Signal node
> - * @id:		unique ID used to identify signal
> - * @name:	device-specific Signal name; ideally, this should match the name
> - *		as it appears in the datasheet documentation
> - * @ext:	optional array of Counter Signal extensions
> - * @num_ext:	number of Counter Signal extensions specified in @ext
> + * @id:		unique ID used to identify the Signal
> + * @name:	device-specific Signal name
> + * @ext:	optional array of Signal extensions
> + * @num_ext:	number of Signal extensions specified in @ext
>    */
>   struct counter_signal {
>   	int id;
> @@ -206,7 +205,7 @@ struct counter_signal {
>    * struct counter_synapse - Counter Synapse node
>    * @actions_list:	array of available action modes
>    * @num_actions:	number of action modes specified in @actions_list
> - * @signal:		pointer to associated signal
> + * @signal:		pointer to the associated Signal
>    */
>   struct counter_synapse {
>   	const enum counter_synapse_action *actions_list;
> @@ -217,15 +216,14 @@ struct counter_synapse {
>   
>   /**
>    * struct counter_count - Counter Count node
> - * @id:			unique ID used to identify Count
> - * @name:		device-specific Count name; ideally, this should match
> - *			the name as it appears in the datasheet documentation
> - * @functions_list:	array available function modes
> + * @id:			unique ID used to identify the Count
> + * @name:		device-specific Count name
> + * @functions_list:	array of available function modes
>    * @num_functions:	number of function modes specified in @functions_list
> - * @synapses:		array of synapses for initialization
> - * @num_synapses:	number of synapses specified in @synapses
> - * @ext:		optional array of Counter Count extensions
> - * @num_ext:		number of Counter Count extensions specified in @ext
> + * @synapses:		array of Synapses for initialization
> + * @num_synapses:	number of Synapses specified in @synapses
> + * @ext:		optional array of Count extensions
> + * @num_ext:		number of Count extensions specified in @ext
>    */
>   struct counter_count {
>   	int id;
> @@ -243,15 +241,14 @@ struct counter_count {
>   
>   /**
>    * struct counter_ops - Callbacks from driver
> - * @signal_read:	optional read callback for Signal attribute. The read
> - *			level of the respective Signal should be passed back via
> - *			the level parameter.
> - * @count_read:		optional read callback for Count attribute. The read
> - *			value of the respective Count should be passed back via
> - *			the val parameter.

Are these no longer optional? If they really are optional, it would be nice to
keep that information in the description.

> - * @count_write:	optional write callback for Count attribute. The write
> - *			value for the respective Count is passed in via the val
> + * @signal_read:	read callback for Signals. The read level of the
> + *			respective Signal should be passed back via the level
> + *			parameter.
> + * @count_read:		read callback for Counts. The read value of the
> + *			respective Count should be passed back via the value
>    *			parameter.
> + * @count_write:	write callback for Counts. The write value for the
> + *			respective Count is passed in via the value parameter.
>    * @function_read:	read callback the Count function modes. The read
>    *			function mode of the respective Count should be passed
>    *			back via the function parameter.
> @@ -291,7 +288,7 @@ struct counter_ops {
>   
>   /**
>    * struct counter_device - Counter data structure
> - * @name:		name of the device as it appears in the datasheet
> + * @name:		name of the device

Is there a recommended naming convention if using the datasheet is no longer
recommended?

>    * @parent:		optional parent device providing the counters
>    * @ops:		callbacks from driver
>    * @signals:		array of Signals
>