armv7: Add ST-Ericsson u8500 arch

Based on ST-Ericsson internal git repo.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: John Rigby <john.rigby@linaro.org>
CC: Albert Aribaud <albert.aribaud@free.fr>

1 files changed, 56 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/u8500/clock.c b/arch/arm/cpu/armv7/u8500/clock.c
new file mode 100644
index 000000000..9e3b87394
--- /dev/null
+++ b/arch/arm/cpu/armv7/u8500/clock.c
@@ -0,0 +1,56 @@
+/*
+ * (C) Copyright 2009 ST-Ericsson
+ *
+ * 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 <asm/arch/hardware.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct clkrst {
+	unsigned int pcken;
+	unsigned int pckdis;
+	unsigned int kcken;
+	unsigned int kckdis;
+};
+
+static unsigned int clkrst_base[] = {
+	U8500_CLKRST1_BASE,
+	U8500_CLKRST2_BASE,
+	U8500_CLKRST3_BASE,
+	0,
+	U8500_CLKRST5_BASE,
+	U8500_CLKRST6_BASE,
+	U8500_CLKRST7_BASE,	/* ED only */
+};
+
+/* Turn on peripheral clock at PRCC level */
+void u8500_clock_enable(int periph, int cluster, int kern)
+{
+	struct clkrst *clkrst = (struct clkrst *) clkrst_base[periph - 1];
+
+	if (kern != -1)
+		writel(1 << kern, &clkrst->kcken);
+
+	if (cluster != -1)
+		writel(1 << cluster, &clkrst->pcken);
+}