iwlwifi: add led debugfs function

Adding debugfs file to show current led blinking rate
/sys/kernel/debug/ieee80211/phy0/iwlagn/data/led

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 0b9e824b67c2..0ab3463aa07e 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -591,6 +591,33 @@ static ssize_t iwl_dbgfs_qos_read(struct file *file, char __user *user_buf,
         return ret;
 }
 
+#ifdef CONFIG_IWLWIFI_LEDS
+static ssize_t iwl_dbgfs_led_read(struct file *file, char __user *user_buf,
+                                  size_t count, loff_t *ppos)
+{
+        struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+        int pos = 0;
+        char buf[256];
+        const size_t bufsz = sizeof(buf);
+        ssize_t ret;
+
+        pos += scnprintf(buf + pos, bufsz - pos,
+                         "allow blinking: %s\n",
+                         (priv->allow_blinking) ? "True" : "False");
+        if (priv->allow_blinking) {
+                pos += scnprintf(buf + pos, bufsz - pos,
+                                 "Led blinking rate: %u\n",
+                                 priv->last_blink_rate);
+                pos += scnprintf(buf + pos, bufsz - pos,
+                                 "Last blink time: %lu\n",
+                                 priv->last_blink_time);
+        }
+
+        ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+        return ret;
+}
+#endif
+
 DEBUGFS_READ_WRITE_FILE_OPS(sram);
 DEBUGFS_WRITE_FILE_OPS(log_event);
 DEBUGFS_READ_FILE_OPS(nvm);
@@ -601,6 +628,9 @@ DEBUGFS_READ_FILE_OPS(channels);
 DEBUGFS_READ_FILE_OPS(status);
 DEBUGFS_READ_WRITE_FILE_OPS(interrupt);
 DEBUGFS_READ_FILE_OPS(qos);
+#ifdef CONFIG_IWLWIFI_LEDS
+DEBUGFS_READ_FILE_OPS(led);
+#endif
 
 /*
  * Create the debugfs files and directories
@@ -638,6 +668,9 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
         DEBUGFS_ADD_FILE(status, data);
         DEBUGFS_ADD_FILE(interrupt, data);
         DEBUGFS_ADD_FILE(qos, data);
+#ifdef CONFIG_IWLWIFI_LEDS
+        DEBUGFS_ADD_FILE(led, data);
+#endif
         DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
         DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
                          &priv->disable_chain_noise_cal);
@@ -673,6 +706,9 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_status);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_interrupt);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_qos);
+#ifdef CONFIG_IWLWIFI_LEDS
+        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_led);
+#endif
         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);