[PATCH 02/14] firmware: qcom: Add a generic PAS service

[Jeff Johnson]

On 3/6/2026 2:50 AM, Sumit Garg wrote:
>  drivers/firmware/qcom/Kconfig          |   8 +
>  drivers/firmware/qcom/Makefile         |   1 +
>  drivers/firmware/qcom/qcom_pas.c       | 295 +++++++++++++++++++++++++

kernel-doc is throwing some warnings in this file which I've listed below.
kernel-doc is also throwing warnings in some of the other files touched by
this series, but since those are presumably preexisting I didn't bother to
mention them. Just want to avoid adding new warnings.

>  drivers/firmware/qcom/qcom_pas.h       |  53 +++++
>  include/linux/firmware/qcom/qcom_pas.h |  41 ++++
>  5 files changed, 398 insertions(+)
>  create mode 100644 drivers/firmware/qcom/qcom_pas.c
>  create mode 100644 drivers/firmware/qcom/qcom_pas.h
>  create mode 100644 include/linux/firmware/qcom/qcom_pas.h
...
> +/**
> + * qcom_pas_mem_setup() - Prepare the memory related to a given peripheral
> + *			  for firmware loading
> + * @pas_id:	peripheral authentication service id
> + * @addr:	start address of memory area to prepare
> + * @size:	size of the memory area to prepare
> + *
> + * Returns 0 on success.

kernel-doc complains:
Warning: drivers/firmware/qcom/qcom_pas.c:103 No description found for return
value of 'qcom_pas_mem_setup'

should use the kernel-doc Return: tag

 * Return: 0 on success

(Returns: is also accepted although not documented)

> + */
...
> +/**
> + * qcom_scm_pas_auth_and_reset() - Authenticate the given peripheral firmware
> + *				   and reset the remote processor
> + * @pas_id:	peripheral authentication service id
> + *
> + * Return 0 on success.

hmmm, kernel-doc didn't complain about this one so the script must accept
'Return' without the ":" (but not 'Returns' without the ":").

Suggest changing to Return: to be conformant with the actual documentation:
<https://www.kernel.org/doc/html/latest/doc-guide/kernel-doc.html#function-documentation>

> + */
> +int qcom_pas_auth_and_reset(u32 pas_id)
> +{
> +	if (ops_ptr)
> +		return ops_ptr->auth_and_reset(ops_ptr->dev, pas_id);
> +
> +	return -ENODEV;
> +}
> +EXPORT_SYMBOL_GPL(qcom_pas_auth_and_reset);
...
> +/**
> + * qcom_pas_set_remote_state() - Set the remote processor state
> + * @state:	peripheral state
> + * @pas_id:	peripheral authentication service id
> + *
> + * Returns 0 on success.

Warning: drivers/firmware/qcom/qcom_pas.c:217 No description found for return
value of 'qcom_pas_set_remote_state'

> + */
...
> +/**
> + * qcom_pas_shutdown() - Shut down the remote processor
> + * @pas_id:	peripheral authentication service id
> + *
> + * Returns 0 on success.

Warning: drivers/firmware/qcom/qcom_pas.c:232 No description found for return
value of 'qcom_pas_shutdown'

> + */
...
> +/**
> + * qcom_pas_supported() - Check if the peripheral authentication service is
> + *			  available for the given peripheral
> + * @pas_id:	peripheral authentication service id
> + *
> + * Returns true if PAS is supported for this peripheral, otherwise false.

Warning: drivers/firmware/qcom/qcom_pas.c:248 No description found for return
value of 'qcom_pas_supported'

> + */
...
> +/**
> + * qcom_pas_is_available() - Check for PAS service
> + *
> + * Returns true on success.

Warning: drivers/firmware/qcom/qcom_pas.c:262 No description found for return
value of 'qcom_pas_is_available'

> + */