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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: Xiang Xiao <xiaoxiang@xiaomi.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Xiang Xiao 2018-11-07 23:26:01 +08:00 committed by Bjorn Andersson
parent bfeffd1552
commit 60042a22be
1 changed files with 26 additions and 0 deletions
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26
drivers/remoteproc/remoteproc_debugfs.c
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@ -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,