xes: Update Freescale clock code to work with 86xx processors

[karo-tx-uboot.git] / board / xes / common / fsl_8xxx_clk.c

diff --git a/board/xes/common/fsl_8xxx_clk.c b/board/xes/common/fsl_8xxx_clk.c
new file mode 100644 (file)
index 0000000..0155670
--- /dev/null
+++ b/board/xes/common/fsl_8xxx_clk.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2008 Extreme Engineering Solutions, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.         See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+/*
+ * Return SYSCLK input frequency - 50 MHz or 66 MHz depending on POR config
+ */
+unsigned long get_board_sys_clk(ulong dummy)
+{
+#if defined(CONFIG_MPC85xx)
+       volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+#elif defined(CONFIG_MPC86xx)
+       immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
+       volatile ccsr_gur_t *gur = &immap->im_gur;
+#endif
+       u32 gpporcr = gur->gpporcr;
+
+       if (gpporcr & 0x10000)
+               return 66666666;
+       else
+               return 50000000;
+}
+
+#ifdef CONFIG_MPC85xx
+/*
+ * Return DDR input clock - synchronous with SYSCLK or 66 MHz
+ * Note: 86xx doesn't support asynchronous DDR clk
+ */
+unsigned long get_board_ddr_clk(ulong dummy)
+{
+       volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+       u32 ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9;
+
+       if (ddr_ratio == 0x7)
+               return get_board_sys_clk(dummy);
+
+       return 66666666;
+}
+#endif