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 <ynv...@gmail.com>
---
Changes for v2:
- activate turbo mode and fast bus by default
---
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..c874ec0 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 0x0000000b
+#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);
--
1.7.10.4
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