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remoteproc: core: Register the character device interface

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Add the character device during rproc_add. This would create
a character device node at /dev/remoteproc<index>. Userspace
applications can interact with the remote processor using this
interface.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
Link: https://lore.kernel.org/r/1596044401-22083-3-git-send-email-sidgup@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Siddharth Gupta 2020-07-29 10:40:01 -07:00 committed by Bjorn Andersson
parent 4476770881
commit 62b8f9e993
1 changed files with 7 additions and 0 deletions
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7
drivers/remoteproc/remoteproc_core.c
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@ -1986,6 +1986,11 @@ int rproc_add(struct rproc *rproc)
/* create debugfs entries */ /* create debugfs entries */
rproc_create_debug_dir(rproc); rproc_create_debug_dir(rproc);
/* add char device for this remoteproc */
ret = rproc_char_device_add(rproc);
if (ret < 0)
return ret;
/* /*
* Remind ourselves the remote processor has been attached to rather * Remind ourselves the remote processor has been attached to rather
* than booted by the remoteproc core. This is important because the * than booted by the remoteproc core. This is important because the
@ -2262,6 +2267,7 @@ int rproc_del(struct rproc *rproc)
mutex_unlock(&rproc->lock); mutex_unlock(&rproc->lock);
rproc_delete_debug_dir(rproc); rproc_delete_debug_dir(rproc);
rproc_char_device_remove(rproc);
/* the rproc is downref'ed as soon as it's removed from the klist */ /* the rproc is downref'ed as soon as it's removed from the klist */
mutex_lock(&rproc_list_mutex); mutex_lock(&rproc_list_mutex);
@ -2430,6 +2436,7 @@ static int __init remoteproc_init(void)
{ {
rproc_init_sysfs(); rproc_init_sysfs();
rproc_init_debugfs(); rproc_init_debugfs();
rproc_init_cdev();
rproc_init_panic(); rproc_init_panic();
return 0; return 0;