This functionality is especially useful during the testing phase. When
used in conjunction with Mailbox's Test Framework we can trivially conduct
end-to-end testing i.e. boot co-processor, send and receive messages to
the co-processor, then shut it down again (repeat as required).
Signed-off-by: Ludovic Barre <ludovic.barre@xxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
---
drivers/remoteproc/remoteproc_debugfs.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c
index 9d30809..464470d 100644
--- a/drivers/remoteproc/remoteproc_debugfs.c
+++ b/drivers/remoteproc/remoteproc_debugfs.c
@@ -88,8 +88,37 @@ static ssize_t rproc_state_read(struct file *filp, char __user *userbuf,
return simple_read_from_buffer(userbuf, count, ppos, buf, i);
}
+static ssize_t rproc_state_write(struct file *filp, const char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ struct rproc *rproc = filp->private_data;
+ char buf[2];
+ int ret;
+
+ ret = copy_from_user(buf, userbuf, 1);
+ if (ret)
+ return -EFAULT;
+
+ switch (buf[0]) {
+ case '0':
+ rproc_shutdown(rproc);
+ break;
+ case '1':
+ ret = rproc_boot(rproc);
+ if (ret)
+ dev_warn(&rproc->dev, "Boot failed: %d\n", ret);
+ break;
+ default:
+ dev_err(&rproc->dev, "Unrecognised option: %x\n", buf[1]);
+ return -EINVAL;
+ }
+
+ return count;
+}
+
static const struct file_operations rproc_state_ops = {
.read = rproc_state_read,
+ .write = rproc_state_write,
.open = simple_open,
.llseek = generic_file_llseek,
};
--
1.9.1
--
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