ALSA: Add description of new fm_port option for snd-es1688 driver

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 7134a8f7044289bff7feec07c7e7a6bf52f7028f..a763b76afe5148c35a5a787af503ec3bf55a440c 100644 (file)
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -609,6 +609,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
     Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
 
     port       - port # for ES-1688 chip (0x220,0x240,0x260)
+    fm_port    - port # for OPL3 (option; share the same port as default)
     mpu_port   - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
     irq                - IRQ # for ES-1688 chip (5,7,9,10)
     mpu_irq    - IRQ # for MPU-401 port (5,7,9,10)