Because before switching to a lower clock source, we must switch the clock source first instead of last. So before configuring the PMC_MCKR register, invoke at91_mck_init_down() first.
As said in datasheet, the the size of SPL must not exceed the maximum size allowed(64Kbytes).
Signed-off-by: Wenyou Yang wenyou.yang@microchip.com --- The patch is based on [PATCH 0/6] board: atmel: Add new board: SAMA5D27-SOM1-EK board https://lists.denx.de/pipermail/u-boot/2017-July/298815.html
board/atmel/sama5d2_xplained/sama5d2_xplained.c | 10 ++++++++++ include/configs/sama5d2_xplained.h | 2 +- 2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/board/atmel/sama5d2_xplained/sama5d2_xplained.c b/board/atmel/sama5d2_xplained/sama5d2_xplained.c index 48f45b35ce..8fd7eb8af1 100644 --- a/board/atmel/sama5d2_xplained/sama5d2_xplained.c +++ b/board/atmel/sama5d2_xplained/sama5d2_xplained.c @@ -285,6 +285,16 @@ void at91_pmc_init(void) struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; u32 tmp;
+ /* + * while coming from the ROM code, we run on PLLA @ 492 MHz / 164 MHz + * so we need to slow down and configure MCKR accordingly. + * This is why we have a special flavor of the switching function. + */ + tmp = AT91_PMC_MCKR_PLLADIV_2 | + AT91_PMC_MCKR_MDIV_3 | + AT91_PMC_MCKR_CSS_MAIN; + at91_mck_init_down(tmp); + tmp = AT91_PMC_PLLAR_29 | AT91_PMC_PLLXR_PLLCOUNT(0x3f) | AT91_PMC_PLLXR_MUL(82) | diff --git a/include/configs/sama5d2_xplained.h b/include/configs/sama5d2_xplained.h index 42fb1e11d0..3390bb881d 100644 --- a/include/configs/sama5d2_xplained.h +++ b/include/configs/sama5d2_xplained.h @@ -73,7 +73,7 @@ /* SPL */ #define CONFIG_SPL_FRAMEWORK #define CONFIG_SPL_TEXT_BASE 0x200000 -#define CONFIG_SPL_MAX_SIZE 0x18000 +#define CONFIG_SPL_MAX_SIZE 0x10000 #define CONFIG_SPL_BSS_START_ADDR 0x20000000 #define CONFIG_SPL_BSS_MAX_SIZE 0x80000 #define CONFIG_SYS_SPL_MALLOC_START 0x20080000