[alsa-devel] [PATCH] Fix possibly incorrect offset in wm97xx-core

Marek Vasut marek.vasut at gmail.com
Wed Jun 3 23:44:37 CEST 2009


I just hit a problem with the accelerated (interrupt driven) ts driver. It 
stop responding after a while (sometimes right after you release a stylus off 
the touchscreen, it doesn't generate any more interrupts). I made the 
following patch that fixes the problem for me (and if I read the 9712 and 
9713 manuals correctly, the patch should be OK)

Thanks for reply.

diff --git a/drivers/input/touchscreen/wm97xx-core.c 
index 69af838..4f13a7f 100644
--- a/drivers/input/touchscreen/wm97xx-core.c
+++ b/drivers/input/touchscreen/wm97xx-core.c
@@ -307,11 +307,7 @@ static void wm97xx_pen_irq_worker(struct work_struct 

-               if (wm->id == WM9712_ID2)
-                       wm97xx_reg_write(wm, AC97_GPIO_STATUS, (status &
-                                               ~WM97XX_GPIO_13) << 1);
-               else
-                       wm97xx_reg_write(wm, AC97_GPIO_STATUS, status &
+               wm97xx_reg_write(wm, AC97_GPIO_STATUS, status &

More information about the Alsa-devel mailing list