at91rm9200: Reset update

Update the rm9200 reset sequence to try executing a board-specific reset
function and move specific board reset to board.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

board/atmel/at91rm9200dk/at91rm9200dk.c

@@ -54,6 +54,16 @@ int board_init (void)
 	return 0;
 }
 
+void board_reset (void)
+{
+	AT91PS_PIO pio = AT91C_BASE_PIOA;
+
+	/* Clear PA19 to trigger the hard reset */
+	writel(0x00080000, pio->PIO_CODR);
+	writel(0x00080000, pio->PIO_OER);
+	writel(0x00080000, pio->PIO_PER);
+}
+
 int dram_init (void)
 {
 	gd->bd->bi_dram[0].start = PHYS_SDRAM;

cpu/arm920t/at91rm9200/interrupts.c

@@ -45,6 +45,8 @@ AT91PS_TC tmr;
 static ulong timestamp;
 static ulong lastinc;
 
+void board_reset(void) __attribute__((__weak__));
+
 int interrupt_init (void)
 {
 	tmr = AT91C_BASE_TC0;
@@ -166,21 +168,13 @@ ulong get_tbclk (void)
 void reset_cpu (ulong ignored)
 {
 
-#ifdef CONFIG_AT91RM9200DK
-	AT91PS_PIO pio = AT91C_BASE_PIOA;
-#endif
-
 #if defined(CONFIG_AT91RM9200_USART)
 	/*shutdown the console to avoid strange chars during reset */
 	serial_exit();
 #endif
 
-#ifdef CONFIG_AT91RM9200DK
-	/* Clear PA19 to trigger the hard reset */
-	pio->PIO_CODR = 0x00080000;
-	pio->PIO_OER  = 0x00080000;
-	pio->PIO_PER  = 0x00080000;
-#endif
+	if (board_reset)
+		board_reset();
 
 	/* this is the way Linux does it */