rtlwifi: Improve debugging by using debugfs

Use debugfs to dump register and btcoex status, and also write registers
and h2c.

We create topdir in /sys/kernel/debug/rtlwifi/, and use the MAC address
as subdirectory with several entries to dump mac_reg, bb_reg, rf_reg etc.
An example is
    /sys/kernel/debug/rtlwifi/00-11-22-33-44-55-66/mac_0

This change permits examination of device registers in a dynamic manner,
a feature not available with the current debug mechanism.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c
index 5605fa14aa4c..0ba9c0cc95e1 100644
--- a/drivers/net/wireless/realtek/rtlwifi/base.c
+++ b/drivers/net/wireless/realtek/rtlwifi/base.c
@@ -2530,6 +2530,9 @@ static int __init rtl_core_module_init(void)
         if (rtl_rate_control_register())
                 pr_err("rtl: Unable to register rtl_rc, use default RC !!\n");
 
+        /* add debugfs */
+        rtl_debugfs_add_topdir();
+
         /* init some global vars */
         INIT_LIST_HEAD(&rtl_global_var.glb_priv_list);
         spin_lock_init(&rtl_global_var.glb_list_lock);
@@ -2541,6 +2544,9 @@ static void __exit rtl_core_module_exit(void)
 {
         /*RC*/
         rtl_rate_control_unregister();
+
+        /* remove debugfs */
+        rtl_debugfs_remove_topdir();
 }
 
 module_init(rtl_core_module_init);