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media: cec-core.rst: document the adap_free callback

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Document what this callback does.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Hans Verkuil 2017-07-11 03:30:37 -03:00 committed by Mauro Carvalho Chehab
parent e6259b5f7a
commit f987cde233
1 changed files with 9 additions and 0 deletions
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Documentation/media/kapi/cec-core.rst
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@ -107,6 +107,7 @@ your driver:
int (*adap_transmit)(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *msg);
void (*adap_status)(struct cec_adapter *adap, struct seq_file *file);
void (*adap_free)(struct cec_adapter *adap);
/* High-level callbacks */
...
@ -184,6 +185,14 @@ To log the current CEC hardware status:
This optional callback can be used to show the status of the CEC hardware.
The status is available through debugfs: cat /sys/kernel/debug/cec/cecX/status
To free any resources when the adapter is deleted:
.. c:function::
void (*adap_free)(struct cec_adapter *adap);
This optional callback can be used to free any resources that might have been
allocated by the driver. It's called from cec_delete_adapter.
Your adapter driver will also have to react to events (typically interrupt
driven) by calling into the framework in the following situations: