remoteproc: core: Register the character device interface (62b8f9e9) · Commits · 戴 / test

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>

drivers/remoteproc/remoteproc_core.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -1986,6 +1986,11 @@ int rproc_add(struct rproc *rproc)
		/* create debugfs entries */
		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
		* 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);

		rproc_delete_debug_dir(rproc);
		rproc_char_device_remove(rproc);

		/* the rproc is downref'ed as soon as it's removed from the klist */
		mutex_lock(&rproc_list_mutex);
		@@ -2430,6 +2436,7 @@ static int __init remoteproc_init(void)
		{
		rproc_init_sysfs();
		rproc_init_debugfs();
		rproc_init_cdev();
		rproc_init_panic();

		return 0;

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