Add support for EDB93xx boards

Added support for the following EDB93xx boards:

EDB9301
EDB9302
EDB9302A
EDB9307
EDB9307A
EDB93012
EDB9315
EDB9315A

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>

1 files changed, 58 insertions, 0 deletions

diff --git a/board/edb93xx/pll_cfg.c b/board/edb93xx/pll_cfg.c
new file mode 100644
index 0000000..a687af0
--- /dev/null
+++ b/board/edb93xx/pll_cfg.c
@@ -0,0 +1,58 @@
+/*
+ * PLL setup for Cirrus edb93xx boards
+ *
+ * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
+ *
+ * Copyright (C) 2006 Dominic Rath <Dominic.Rath@gmx.de>
+ *
+ * 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>
+#include <asm/io.h>
+#include "pll_cfg.h"
+#include "early_udelay.h"
+
+void pll_cfg(void)
+{
+	struct syscon_regs *syscon = (struct syscon_regs *)SYSCON_BASE;
+
+	/* setup PLL1 */
+	writel(CLKSET1_VAL, &syscon->clkset1);
+
+	/*
+	 * flush the pipeline
+	 * writing to CLKSET1 causes the EP93xx to enter standby for between
+	 * 8 ms to 16 ms, until PLL1 stabilizes
+	 */
+	asm("nop");
+	asm("nop");
+	asm("nop");
+	asm("nop");
+	asm("nop");
+
+	/* setup PLL2 */
+	writel(CLKSET2_VAL, &syscon->clkset2);
+
+	/*
+	 * the user's guide recommends to wait at least 1 ms for PLL2 to
+	 * stabilize
+	 */
+	early_udelay(1000);
+}