The efuse contains the mac address and calibration data. During
manufacturing and testing it can be necessary to read and check this
data.
Add a debugfs interface to make it available to userspace.
Signed-off-by: Martin Kaistra <martin.kaistra@xxxxxxxxxxxxx>
---
drivers/net/wireless/realtek/rtl8xxxu/core.c | 24 ++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtl8xxxu/core.c b/drivers/net/wireless/realtek/rtl8xxxu/core.c
index 831b5025c6349..b45010c93ad72 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/core.c
@@ -1901,6 +1901,29 @@ static void rtl8xxxu_dump_efuse(struct rtl8xxxu_priv *priv)
priv->efuse_wifi.raw, EFUSE_MAP_LEN, true);
}
+/* debugfs: efuse */
+static ssize_t read_file_efuse(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct rtl8xxxu_priv *priv = file_inode(file)->i_private;
+
+ return simple_read_from_buffer(user_buf, count, ppos,
+ priv->efuse_wifi.raw, EFUSE_MAP_LEN);
+}
+
+static const struct file_operations fops_efuse = {
+ .read = read_file_efuse,
+ .owner = THIS_MODULE,
+};
+
+static void rtl8xxxu_debugfs_init(struct rtl8xxxu_priv *priv)
+{
+ struct dentry *phydir;
+
+ phydir = debugfs_create_dir("rtl8xxxu", priv->hw->wiphy->debugfsdir);
+ debugfs_create_file("efuse", 0400, phydir, priv, &fops_efuse);
+}
+
void rtl8xxxu_reset_8051(struct rtl8xxxu_priv *priv)
{
u8 val8;
@@ -7974,6 +7997,7 @@ static int rtl8xxxu_probe(struct usb_interface *interface,
}
rtl8xxxu_init_led(priv);
+ rtl8xxxu_debugfs_init(priv);
return 0;
--
2.39.5
