Dear Sergey Yanovich,
PXA270 CPU has turbo mode. The mode is 2.5 times faster than the default run mode. Activating the mode early significantly speeds up boot process.
Signed-off-by: Sergey Yanovich ynvich@gmail.com
What's the difference? Where does this macro get used ?
arch/arm/cpu/pxa/pxa2xx.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/pxa/pxa2xx.c b/arch/arm/cpu/pxa/pxa2xx.c index 09e8177..6c918ac 100644 --- a/arch/arm/cpu/pxa/pxa2xx.c +++ b/arch/arm/cpu/pxa/pxa2xx.c @@ -32,6 +32,10 @@ #include <common.h> #include <asm/arch/pxa-regs.h>
+#ifndef CONFIG_SYS_CLKCFG +#define CONFIG_SYS_CLKCFG 0x00000002 +#endif
/* Flush I/D-cache */ static void cache_flush(void) { @@ -244,7 +248,8 @@ void pxa_clock_setup(void) { writel(CONFIG_SYS_CKEN, CKEN); writel(CONFIG_SYS_CCCR, CCCR);
- asm volatile("mcr p14, 0, %0, c6, c0, 0" : : "r"(2));
asm volatile("mcr p14, 0, %0, c6, c0, 0" : :
"r"(CONFIG_SYS_CLKCFG));/* enable the 32Khz oscillator for RTC and PowerManager */ writel(OSCC_OON, OSCC);
Best regards, Marek Vasut