From: Rafał Miłecki <rafal@xxxxxxxxxx>
This is a trivial debugfs entry for triggering reset just like in case
of firmware crash. It works by writing 1 to it:
echo 1 > reset
Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
---
.../broadcom/brcm80211/brcmfmac/core.c | 25 +++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
index 705b8cc53c3e..21e07d1ceeae 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
@@ -1086,6 +1086,29 @@ static void brcmf_core_bus_reset(struct work_struct *work)
brcmf_bus_reset(drvr->bus_if);
}
+static ssize_t bus_reset_write(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct brcmf_pub *drvr = file->private_data;
+ u8 value;
+
+ if (kstrtou8_from_user(user_buf, count, 0, &value))
+ return -EINVAL;
+
+ if (value != 1)
+ return -EINVAL;
+
+ schedule_work(&drvr->bus_reset);
+
+ return count;
+}
+
+static const struct file_operations bus_reset_fops = {
+ .open = simple_open,
+ .llseek = no_llseek,
+ .write = bus_reset_write,
+};
+
static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops)
{
int ret = -1;
@@ -1161,6 +1184,8 @@ static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops)
/* populate debugfs */
brcmf_debugfs_add_entry(drvr, "revinfo", brcmf_revinfo_read);
+ debugfs_create_file("reset", 0600, brcmf_debugfs_get_devdir(drvr), drvr,
+ &bus_reset_fops);
brcmf_feat_debugfs_create(drvr);
brcmf_proto_debugfs_create(drvr);
brcmf_bus_debugfs_create(bus_if);
--
2.21.0
