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 --- Changes in v2: - remove unnecessary comment - use debugfs_short_fops drivers/net/wireless/realtek/rtl8xxxu/core.c | 22 ++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/net/wireless/realtek/rtl8xxxu/core.c b/drivers/net/wireless/realtek/rtl8xxxu/core.c index 831b5025c6349..aea706f0251d8 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/core.c @@ -1901,6 +1901,27 @@ static void rtl8xxxu_dump_efuse(struct rtl8xxxu_priv *priv) priv->efuse_wifi.raw, EFUSE_MAP_LEN, true); } +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 debugfs_short_fops fops_efuse = { + .read = read_file_efuse, +}; + +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 +7995,7 @@ static int rtl8xxxu_probe(struct usb_interface *interface, } rtl8xxxu_init_led(priv); + rtl8xxxu_debugfs_init(priv); return 0; -- 2.39.5