Commit 60042a22 authored by Xiang Xiao's avatar Xiang Xiao Committed by Bjorn Andersson
Browse files

remoteproc: debug: add crash debugfs node 



so we can trigger the crash manully which could:
1.test the crash handling code path more easily
2.update the firmware without reboot kernel

Signed-off-by: default avatarXiang Xiao <xiaoxiang@xiaomi.com>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent bfeffd15

drivers/remoteproc/remoteproc_debugfs.c

+26 −0
Original line number Diff line number Diff line
@@ -155,6 +155,30 @@ static const struct file_operations rproc_recovery_ops = { 
	.llseek = generic_file_llseek,

};



/* expose the crash trigger via debugfs */

static ssize_t

rproc_crash_write(struct file *filp, const char __user *user_buf,

		  size_t count, loff_t *ppos)

{

	struct rproc *rproc = filp->private_data;

	unsigned int type;

	int ret;



	ret = kstrtouint_from_user(user_buf, count, 0, &type);

	if (ret < 0)

		return ret;



	rproc_report_crash(rproc, type);



	return count;

}



static const struct file_operations rproc_crash_ops = {

	.write = rproc_crash_write,

	.open = simple_open,

	.llseek = generic_file_llseek,

};



/* Expose resource table content via debugfs */

static int rproc_rsc_table_show(struct seq_file *seq, void *p)

{
@@ -325,6 +349,8 @@ void rproc_create_debug_dir(struct rproc *rproc) 
			    rproc, &rproc_name_ops);

	debugfs_create_file("recovery", 0400, rproc->dbg_dir,

			    rproc, &rproc_recovery_ops);

	debugfs_create_file("crash", 0200, rproc->dbg_dir,

			    rproc, &rproc_crash_ops);

	debugfs_create_file("resource_table", 0400, rproc->dbg_dir,

			    rproc, &rproc_rsc_table_ops);

	debugfs_create_file("carveout_memories", 0400, rproc->dbg_dir,

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