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Message-ID: <20210609175505.5bca286d@jic23-huawei>
Date: Wed, 9 Jun 2021 17:55:05 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: William Breathitt Gray <vilhelm.gray@...il.com>
Cc: linux-stm32@...md-mailman.stormreply.com, kernel@...gutronix.de,
a.fatoum@...gutronix.de, kamel.bouhara@...tlin.com,
gwendal@...omium.org, alexandre.belloni@...tlin.com,
david@...hnology.com, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
syednwaris@...il.com, patrick.havelange@...ensium.com,
fabrice.gasnier@...com, mcoquelin.stm32@...il.com,
alexandre.torgue@...com, o.rempel@...gutronix.de,
jarkko.nikula@...ux.intel.com
Subject: Re: [PATCH v11 23/33] counter: Update counter.h comments to reflect
sysfs internalization
On Wed, 9 Jun 2021 10:31:26 +0900
William Breathitt Gray <vilhelm.gray@...il.com> 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@...il.com>
I'd rather see anything in here that isn't just tidy up moved back to the
earlier patches.
> ---
> drivers/counter/counter-core.c | 3 ++
> include/linux/counter.h | 72 +++++++++++++++-------------------
> 2 files changed, 35 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/counter/counter-core.c b/drivers/counter/counter-core.c
> index e7dd6ea01c8a..407661c6feb0 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 567471818ec3..e7fd6d81a929 100644
> --- a/include/linux/counter.h
> +++ b/include/linux/counter.h
> @@ -188,12 +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
> - * @priv: optional private data supplied by driver
> + * @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
I'm not keen on having a stage between patches where there
area things documented that don't exist. (e.g. priv)
> */
> struct counter_signal {
> int id;
> @@ -207,7 +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;
> @@ -218,17 +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
> - * @function: index of current function mode
> - * @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
> - * @priv: optional private data supplied by driver
> + * @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;
> @@ -246,29 +241,26 @@ 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.
> - * @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.
> - * @function_get: function to get the current count function mode. Returns
> - * 0 on success and negative error code on error. The index
> - * of the respective Count's returned function mode should
> - * be passed back via the function parameter.
> - * @function_set: function to set the count function mode. function is the
> - * index of the requested function mode from the respective
> - * Count's functions_list array.
> - * @action_get: function to get the current action mode. Returns 0 on
> - * success and negative error code on error. The index of
> - * the respective Synapse's returned action mode should be
> - * passed back via the action parameter.
> - * @action_set: function to set the action mode. action is the index of
> - * the requested action mode from the respective Synapse's
> - * actions_list array.
> + * @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.
> + * @function_write: write callback for Count function modes. The function
> + * mode to write for the respective Count is passed in via
> + * the function parameter.
> + * @action_read: read callback the Synapse action modes. The read action
> + * mode of the respective Synapse should be passed back via
> + * the action parameter.
> + * @action_write: write callback for Synapse action modes. The action mode
> + * to write for the respective Synapse is passed in via the
> + * action parameter.
> */
> struct counter_ops {
> int (*signal_read)(struct counter_device *counter,
> @@ -296,7 +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
> * @parent: optional parent device providing the counters
> * @ops: callbacks from driver
> * @signals: array of Signals
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