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>

diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h
index 1555676..e4a4dbd 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-debug.h
+++ b/drivers/net/wireless/iwlwifi/iwl-debug.h
@@ -83,6 +83,9 @@ struct iwl_debugfs {
                struct dentry *file_status;
                struct dentry *file_interrupt;
                struct dentry *file_qos;
+#ifdef CONFIG_IWLWIFI_LEDS
+               struct dentry *file_led;
+#endif
        } dbgfs_data_files;
        struct dir_rf_files {
                struct dentry *file_disable_sensitivity;

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 0b9e824..0ab3463 100644 (file)
--- 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);