iwlwifi: show current power save status reported by uCode

[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-debugfs.c

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 2cd11ba963700d6e12a97a710354a20a99f225c3..e78cd26b809fed7bdd1c7d4372d74e5b191d7f72 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -1802,6 +1802,29 @@ static ssize_t iwl_dbgfs_tx_power_read(struct file *file,
        return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }
 
+static ssize_t iwl_dbgfs_power_save_status_read(struct file *file,
+                                                   char __user *user_buf,
+                                                   size_t count, loff_t *ppos)
+{
+       struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+       char buf[60];
+       int pos = 0;
+       const size_t bufsz = sizeof(buf);
+       u32 pwrsave_status;
+
+       pwrsave_status = iwl_read32(priv, CSR_GP_CNTRL) &
+                       CSR_GP_REG_POWER_SAVE_STATUS_MSK;
+
+       pos += scnprintf(buf + pos, bufsz - pos, "Power Save Status: ");
+       pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
+               (pwrsave_status == CSR_GP_REG_NO_POWER_SAVE) ? "none" :
+               (pwrsave_status == CSR_GP_REG_MAC_POWER_SAVE) ? "MAC" :
+               (pwrsave_status == CSR_GP_REG_PHY_POWER_SAVE) ? "PHY" :
+               "error");
+
+       return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+}
+
 DEBUGFS_READ_WRITE_FILE_OPS(rx_statistics);
 DEBUGFS_READ_WRITE_FILE_OPS(tx_statistics);
 DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@@ -1813,6 +1836,7 @@ DEBUGFS_READ_FILE_OPS(ucode_general_stats);
 DEBUGFS_READ_FILE_OPS(sensitivity);
 DEBUGFS_READ_FILE_OPS(chain_noise);
 DEBUGFS_READ_FILE_OPS(tx_power);
+DEBUGFS_READ_FILE_OPS(power_save_status);
 
 /*
  * Create the debugfs files and directories
@@ -1860,6 +1884,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
        DEBUGFS_ADD_FILE(rx_queue, debug);
        DEBUGFS_ADD_FILE(tx_queue, debug);
        DEBUGFS_ADD_FILE(tx_power, debug);
+       DEBUGFS_ADD_FILE(power_save_status, debug);
        if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
                DEBUGFS_ADD_FILE(ucode_rx_stats, debug);
                DEBUGFS_ADD_FILE(ucode_tx_stats, debug);
@@ -1912,6 +1937,7 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_rx_queue);
        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_queue);
        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_tx_power);
+       DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.file_power_save_status);
        if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) != CSR_HW_REV_TYPE_3945) {
                DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files.
                        file_ucode_rx_stats);