Author: gonzo
Date: Sat Jan 24 01:53:28 2015
New Revision: 277632
URL: https://svnweb.freebsd.org/changeset/base/277632
Log:
After interrupt read value from register to make sure it reached hardware.
This
should fix "Spurious inteerupt" message
Suggested by ian@
Modified:
head/sys/arm/ti/am335x/am335x_lcd.c
Modified: head/sys/arm/ti/am335x/am335x_lcd.c
==============================================================================
--- head/sys/arm/ti/am335x/am335x_lcd.c Sat Jan 24 01:50:52 2015
(r277631)
+++ head/sys/arm/ti/am335x/am335x_lcd.c Sat Jan 24 01:53:28 2015
(r277632)
@@ -356,6 +356,8 @@ am335x_lcd_intr(void *arg)
reg = LCD_READ4(sc, LCD_IRQSTATUS);
LCD_WRITE4(sc, LCD_IRQSTATUS, reg);
+ /* Read value back to make sure it reached the hardware */
+ reg = LCD_READ4(sc, LCD_IRQSTATUS);
if (reg & IRQ_SYNC_LOST) {
reg = LCD_READ4(sc, LCD_RASTER_CTRL);
@@ -401,6 +403,8 @@ am335x_lcd_intr(void *arg)
done:
LCD_WRITE4(sc, LCD_END_OF_INT_IND, 0);
+ /* Read value back to make sure it reached the hardware */
+ reg = LCD_READ4(sc, LCD_END_OF_INT_IND);
}
static int
_______________________________________________
svn-src-all@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
