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From: Oleksandr Tymoshenko <gonzo@FreeBSD.org>
Date: Tue, 20 Jan 2015 02:24:08 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r277405 - head/sys/arm/ti/am335x
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Author: gonzo
Date: Tue Jan 20 02:24:08 2015
New Revision: 277405
URL: https://svnweb.freebsd.org/changeset/base/277405

Log:
  Properly clear IRQ status in order to fix "Spurious IRQ" message from AINT.
  
  This register is not documented in TRM but that's what linux driver does

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	Mon Jan 19 22:18:00 2015	(r277404)
+++ head/sys/arm/ti/am335x/am335x_lcd.c	Tue Jan 20 02:24:08 2015	(r277405)
@@ -150,6 +150,7 @@ __FBSDID("$FreeBSD$");
 #define		IRQ_SYNC_LOST		(1 << 2)
 #define		IRQ_RASTER_DONE		(1 << 1)
 #define		IRQ_FRAME_DONE		(1 << 0)
+#define	LCD_END_OF_INT_IND	0x68
 #define	LCD_CLKC_ENABLE		0x6C
 #define		CLKC_ENABLE_DMA		(1 << 2)
 #define		CLKC_ENABLE_LDID	(1 << 1)
@@ -397,6 +398,8 @@ am335x_lcd_intr(void *arg)
 	if (reg & IRQ_ACB) {
 		/* TODO: Handle ACB */
 	}
+
+	LCD_WRITE4(sc, LCD_END_OF_INT_IND, 0);
 }
 
 static int