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-rw-r--r--arch/powerpc/cpu/mpc85xx/cpu_init_nand.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c b/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c
index bf7a6f6..0589497 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c
@@ -21,9 +21,13 @@
*/
#include <common.h>
+#include <asm/processor.h>
+#include <asm/global_data.h>
#include <asm/fsl_ifc.h>
#include <asm/io.h>
+DECLARE_GLOBAL_DATA_PTR;
+
void cpu_init_f(void)
{
#if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SYS_INIT_L2_ADDR)
@@ -40,3 +44,16 @@ void cpu_init_f(void)
(MPC85xx_L2CTL_L2E | MPC85xx_L2CTL_L2SRAM_ENTIRE));
#endif
}
+
+#ifndef CONFIG_SYS_FSL_TBCLK_DIV
+#define CONFIG_SYS_FSL_TBCLK_DIV 8
+#endif
+
+void udelay(unsigned long usec)
+{
+ u32 ticks_per_usec = gd->bus_clk / (CONFIG_SYS_FSL_TBCLK_DIV * 1000000);
+ u32 ticks = ticks_per_usec * usec;
+ u32 s = mfspr(SPRN_TBRL);
+
+ while ((mfspr(SPRN_TBRL) - s) < ticks);
+}