Fix external IRQ configuration on Yellowstone & Yosemite

The multiplexed signals Ext IRQ0...3 have to be configured as IRQ,
because they default to GPIOx (440EP/GR).

Patch by Stefan Roese, 28 Oct 2005

CHANGELOG

@@ -2,6 +2,9 @@
 Changes for U-Boot 1.1.4:
 ======================================================================
 
+* Fix external IRQ configuration on Yellowstone & Yosemite
+  Patch by Stefan Roese, 28 Oct 2005
+
 * Add PCI support for the TQM834x board.
 
 * Add missing 4xx board to MAKEALL

board/amcc/yellowstone/yellowstone.c

@@ -95,6 +95,11 @@ int board_early_init_f(void)
 	out32(GPIO1_OSRL, in32(GPIO1_OSRL) | 0x00080000);
 	out32(GPIO1_ISR2L, in32(GPIO1_ISR2L) | 0x00010000);
 
+	/* external interrupts IRQ0...3 */
+	out32(GPIO1_TCR, in32(GPIO1_TCR) & ~0x0f000000);
+	out32(GPIO1_TSRL, in32(GPIO1_TSRL) & ~0x00005500);
+	out32(GPIO1_ISR1L, in32(GPIO1_ISR1L) | 0x00005500);
+
 #if 0 /* test-only */
 	/*setup USB 2.0 */
 	out32(GPIO1_TCR, in32(GPIO1_TCR) | 0xc0000000);

board/amcc/yosemite/yosemite.c

@@ -95,6 +95,11 @@ int board_early_init_f(void)
 	out32(GPIO1_OSRL, in32(GPIO1_OSRL) | 0x00080000);
 	out32(GPIO1_ISR2L, in32(GPIO1_ISR2L) | 0x00010000);
 
+	/* external interrupts IRQ0...3 */
+	out32(GPIO1_TCR, in32(GPIO1_TCR) & ~0x0f000000);
+	out32(GPIO1_TSRL, in32(GPIO1_TSRL) & ~0x00005500);
+	out32(GPIO1_ISR1L, in32(GPIO1_ISR1L) | 0x00005500);
+
 	/*setup USB 2.0 */
 	out32(GPIO1_TCR, in32(GPIO1_TCR) | 0xc0000000);
 	out32(GPIO1_OSRL, in32(GPIO1_OSRL) | 0x50000000);