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avr32: Use board_postclk_init instead of gclk_init

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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>
This commit is contained in:
Haavard Skinnemoen 2008-08-31 18:24:24 +02:00
parent abdde2b1d5
commit 36d375faf5
4 changed files with 10 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
board/miromico/hammerhead/hammerhead.c
View File

@ -100,9 +100,10 @@ void board_init_info(void)
gd->bd->bi_phy_id[0] = 0x01;
}
void gclk_init(void)
int board_postclk_init(void)
{
/* Hammerhead boards uses GCLK3 as 25MHz output to ethernet PHY */
gclk_enable_output(3, PORTMUX_DRIVE_LOW);
gclk_set_rate(3, GCLK_PARENT_OSC0, 25000000);
return 0;
}

3
cpu/at32ap/cpu.c
View File

@ -65,9 +65,6 @@ int cpu_init(void)
sysreg_write(EVBA, (unsigned long)&_evba);
asm volatile("csrf %0" : : "i"(SYSREG_EM_OFFSET));
if(gclk_init)
gclk_init();
return 0;
}

1
include/asm-avr32/arch-at32ap700x/clk.h
View File

@ -84,7 +84,6 @@ static inline unsigned long get_spi_clk_rate(unsigned int dev_id)
#endif
extern void clk_init(void);
extern void gclk_init(void) __attribute__((weak));
/* Board code may need the SDRAM base clock as a compile-time constant */
#define SDRAMC_BUS_HZ (MAIN_CLK_RATE >> CFG_CLKDIV_HSB)

8
lib_avr32/board.c
View File

@ -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();