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wifi: rtl8xxxu: expose efuse via debugfs

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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@linutronix.de>
Reviewed-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20250901121613.1876109-1-martin.kaistra@linutronix.de
This commit is contained in:
Martin Kaistra 2025-09-01 14:16:13 +02:00 committed by Ping-Ke Shih
parent 35ded83be0
commit 00afddfe4c
1 changed files with 22 additions and 0 deletions
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22
drivers/net/wireless/realtek/rtl8xxxu/core.c
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@ -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;
@ -7975,6 +7996,7 @@ static int rtl8xxxu_probe(struct usb_interface *interface,
}
rtl8xxxu_init_led(priv);
rtl8xxxu_debugfs_init(priv);
return 0;