1 files changed, 52 insertions, 0 deletions
diff --git a/roms/u-boot/arch/powerpc/cpu/mpc5xx/speed.c b/roms/u-boot/arch/powerpc/cpu/mpc5xx/speed.c
new file mode 100644
index 00000000..24b9026f
--- /dev/null
+++ b/roms/u-boot/arch/powerpc/cpu/mpc5xx/speed.c
@@ -0,0 +1,52 @@
+/*
+ * (C) Copyright 2003
+ * Martin Winistoerfer, martinwinistoerfer@gmx.ch.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * File:		speed.c
+ *
+ * Discription:		Provides cpu speed calculation
+ *
+ */
+
+#include <common.h>
+#include <mpc5xx.h>
+#include <asm/processor.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Get cpu and bus clock
+ */
+int get_clocks (void)
+{
+	volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
+
+#ifndef	CONFIG_5xx_GCLK_FREQ
+	uint divf = (immr->im_clkrst.car_plprcr & PLPRCR_DIVF_MSK);
+	uint mf = ((immr->im_clkrst.car_plprcr & PLPRCR_MF_MSK) >> PLPRCR_MF_SHIFT);
+	ulong vcoout;
+
+	vcoout = (CONFIG_SYS_OSC_CLK / (divf + 1)) * (mf + 1) * 2;
+	if(immr->im_clkrst.car_plprcr & PLPRCR_CSRC_MSK) {
+		gd->cpu_clk = vcoout / (2^(((immr->im_clkrst.car_sccr & SCCR_DFNL_MSK) >> SCCR_DFNL_SHIFT) + 1));
+	} else {
+		gd->cpu_clk = vcoout / (2^(immr->im_clkrst.car_sccr & SCCR_DFNH_MSK));
+	}
+
+#else /* CONFIG_5xx_GCLK_FREQ */
+	gd->bus_clk = CONFIG_5xx_GCLK_FREQ;
+#endif /* CONFIG_5xx_GCLK_FREQ */
+
+	if ((immr->im_clkrst.car_sccr & SCCR_EBDF11) == 0) {
+		/* No Bus Divider active */
+		gd->bus_clk = gd->cpu_clk;
+	} else {
+		/* CLKOUT is GCLK / 2 */
+		gd->bus_clk = gd->cpu_clk / 2;
+	}
+	return (0);
+}