From 83f53220f8313f097cdf181928be13bafbb697ea Mon Sep 17 00:00:00 2001
From: Vladimir Barinov <vbarinov@ru.mvista.com>
Date: Tue, 10 Jul 2007 13:10:04 +0100
Subject: [ARM] 4432/5: davinci: pin mux support

Support pin multiplexing configurations driver for TI DaVinci SoC

Signed-off-by: Vladimir Barinov <vbarinov@ru.mvista.com>
Acked-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/mach-davinci/mux.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 arch/arm/mach-davinci/mux.c

(limited to 'arch/arm/mach-davinci/mux.c')

diff --git a/arch/arm/mach-davinci/mux.c b/arch/arm/mach-davinci/mux.c
new file mode 100644
index 00000000000..92d26bd305b
--- /dev/null
+++ b/arch/arm/mach-davinci/mux.c
@@ -0,0 +1,41 @@
+/*
+ * DaVinci pin multiplexing configurations
+ *
+ * Author: Vladimir Barinov, MontaVista Software, Inc. <source@mvista.com>
+ *
+ * 2007 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#include <linux/io.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware.h>
+
+#include <asm/arch/mux.h>
+
+/* System control register offsets */
+#define PINMUX0         0x00
+#define PINMUX1         0x04
+
+static DEFINE_SPINLOCK(mux_lock);
+
+void davinci_mux_peripheral(unsigned int mux, unsigned int enable)
+{
+	u32 pinmux, muxreg = PINMUX0;
+
+	if (mux >= DAVINCI_MUX_LEVEL2) {
+		muxreg = PINMUX1;
+		mux -= DAVINCI_MUX_LEVEL2;
+	}
+
+	spin_lock(&mux_lock);
+	pinmux = davinci_readl(DAVINCI_SYSTEM_MODULE_BASE + muxreg);
+	if (enable)
+		pinmux |= (1 << mux);
+	else
+		pinmux &= ~(1 << mux);
+	davinci_writel(pinmux, DAVINCI_SYSTEM_MODULE_BASE + muxreg);
+	spin_unlock(&mux_lock);
+}
-- 
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