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authorMatthias Kaehlcke <matthias@kaehlcke.net>2010-02-01 21:29:48 +0100
committerTom Rix <Tom.Rix@windriver.com>2010-02-12 12:31:54 -0600
commitcf3c142ee4be0f077f8b84593f1b24b35d14039e (patch)
tree7687c04cea8b29ec69a8ef2ebc64864d46a20ab1 /board/edb93xx/pll_cfg.c
parentd798e27b14543762f9f5d0561a3430c7f9e2153b (diff)
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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>
Diffstat (limited to 'board/edb93xx/pll_cfg.c')
-rw-r--r--board/edb93xx/pll_cfg.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/board/edb93xx/pll_cfg.c b/board/edb93xx/pll_cfg.c
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+++ b/board/edb93xx/pll_cfg.c
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+/*
+ * 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);
+}