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-rw-r--r--cpu/arm926ejs/at91/clock.c7
-rw-r--r--include/asm-arm/arch-at91/at91_pmc.h3
2 files changed, 7 insertions, 3 deletions
diff --git a/cpu/arm926ejs/at91/clock.c b/cpu/arm926ejs/at91/clock.c
index 444d42d..b06d760 100644
--- a/cpu/arm926ejs/at91/clock.c
+++ b/cpu/arm926ejs/at91/clock.c
@@ -157,9 +157,10 @@ int at91_clock_init(unsigned long main_clock)
*/
if (!main_clock) {
do {
- tmp = at91_sys_read(AT91_CKGR_MCFR);
- } while (!(tmp & AT91_PMC_MAINRDY));
- main_clock = (tmp & AT91_PMC_MAINF) * (AT91_SLOW_CLOCK / 16);
+ tmp = readl(&pmc->mcfr);
+ } while (!(tmp & AT91_PMC_MCFR_MAINRDY));
+ tmp &= AT91_PMC_MCFR_MAINF_MASK;
+ main_clock = tmp * (AT91_SLOW_CLOCK / 16);
}
#endif
main_clk_rate_hz = main_clock;
diff --git a/include/asm-arm/arch-at91/at91_pmc.h b/include/asm-arm/arch-at91/at91_pmc.h
index 369b5d7..680fe33 100644
--- a/include/asm-arm/arch-at91/at91_pmc.h
+++ b/include/asm-arm/arch-at91/at91_pmc.h
@@ -71,6 +71,9 @@ typedef struct at91_pmc {
#define AT91_PMC_PLLBR_USBDIV_2 0x10000000
#define AT91_PMC_PLLBR_USBDIV_4 0x20000000
+#define AT91_PMC_MCFR_MAINRDY 0x00010000
+#define AT91_PMC_MCFR_MAINF_MASK 0x0000FFFF
+
#define AT91_PMC_MCKR_CSS_SLOW 0x00000000
#define AT91_PMC_MCKR_CSS_MAIN 0x00000001
#define AT91_PMC_MCKR_CSS_PLLA 0x00000002