avr32: Use board_postclk_init instead of gclk_init

Replace the avr32-specific gclk_init() board hook with the standard
board_postclk_init() hook which is supposed to run at the same point
during initialization.

Provide a dummy weak alias for boards not implementing this hook. The
cost of this is:
  - 2 bytes for the dummy function (retal 0)
  - 2 bytes for each unnecessary function call (short rcall)

which is a pretty small price to pay for avoiding lots of #ifdef
clutter. In this particular case, all boards probably end up slightly
smaller because we avoid the conditional checking if the gclk_init
symbol is NULL.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/lib_avr32/board.c b/lib_avr32/board.c
index d6423d4..19d76d2 100644
--- a/lib_avr32/board.c
+++ b/lib_avr32/board.c
@@ -47,6 +47,13 @@ static unsigned long mem_malloc_start = 0;
 static unsigned long mem_malloc_end = 0;
 static unsigned long mem_malloc_brk = 0;
 
+/* Weak aliases for optional board functions */
+static int __do_nothing(void)
+{
+	return 0;
+}
+int board_postclk_init(void) __attribute__((weak, alias("__do_nothing")));
+
 /* The malloc area is right below the monitor image in RAM */
 static void mem_malloc_init(void)
 {
@@ -187,6 +194,7 @@ void board_init_f(ulong board_type)
 	/* Perform initialization sequence */
 	board_early_init_f();
 	cpu_init();
+	board_postclk_init();
 	env_init();
 	init_baudrate();
 	serial_init();