Hello Bo,
Am 31.10.2014 02:50, schrieb Bo Shen:
Hi Heiko,
On 10/30/2014 04:15 PM, Heiko Schocher wrote:
diff --git a/arch/arm/cpu/at91-common/spl.c b/arch/arm/cpu/at91-common/spl.c
index 674a470..5c9a3ad 100644
--- a/arch/arm/cpu/at91-common/spl.c
+++ b/arch/arm/cpu/at91-common/spl.c
I am thinking, whether it be better to keep this file as two copy? This will
remove #ifdef, although a little code duplication.
If this solution acceptable, some suggestion as following:
- for armv5 (arm926ejs, now at91 series), named it spl_at91.c,
- for armv7 (cortex-a5, now, sama5d3), named it spl_atmel.c?
(As for arm9 series, we have at91 prefix for SoC name, and for armv7 SoC, we
don't have at91 prefix, and it now changed to Atmel Smart)
Ok, I look into this.
[...]
@@ -57,77 +91,134 @@ static void switch_to_main_crystal_osc(void)
[...]
- /* disable watchdog */
+void spl_board_init(void)
+{
+ struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+ lowlevel_clock_init();
at91_disable_wdt();
- /* PMC configuration */
- at91_pmc_init();
+ /*
+ * At this stage the main oscillator is supposed to be enabled
+ * PCK = MCK = MOSC
+ */
+ writel(0x00, &pmc->pllicpr);
- at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
+ /* Configure PLLA = MOSC * (PLL_MULA + 1) / PLL_DIVA */
+ at91_plla_init(CONFIG_SYS_AT91_PLLA);
- timer_init();
+ /* PCK = PLLA = 2 * MCK */
+ at91_mck_init(CONFIG_SYS_MCKR);
- board_early_init_f();
+ /* Switch MCK on PLLA output */
+ at91_mck_init(CONFIG_SYS_MCKR_CSS);
+
+#if defined(CONFIG_SYS_AT91_PLLB)
+ /* Configure PLLB */
+ at91_pllb_init(CONFIG_SYS_AT91_PLLB);
+#endif
+
+ /* Enable External Reset */
+ enable_ext_reset();
+#if defined(CONFIG_ATMEL_MATRIX_INIT)
+ /* Initialize matrix */
+ matrix_init();
+#endif
Can this also be weak function? And put matrix_init() code to SoC/board related
file.
Changed.
Thanks!
bye,
Heiko
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