From 858bd095e1583f86af93ac1ae8f9e28aebbd0aa5 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Tue, 30 Aug 2011 06:23:14 +0000
Subject: Tegra2: Add additional pin multiplexing features

This adds an enum for each pin and some functions for changing the pin
muxing setup.

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 arch/arm/cpu/armv7/tegra2/Makefile |  2 +-
 arch/arm/cpu/armv7/tegra2/pinmux.c | 52 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/cpu/armv7/tegra2/pinmux.c

(limited to 'arch/arm/cpu')

diff --git a/arch/arm/cpu/armv7/tegra2/Makefile b/arch/arm/cpu/armv7/tegra2/Makefile
index b35764c..f673f03 100644
--- a/arch/arm/cpu/armv7/tegra2/Makefile
+++ b/arch/arm/cpu/armv7/tegra2/Makefile
@@ -28,7 +28,7 @@ include $(TOPDIR)/config.mk
 LIB	=  $(obj)lib$(SOC).o
 
 SOBJS	:= lowlevel_init.o
-COBJS	:= ap20.o board.o clock.o sys_info.o timer.o
+COBJS	:= ap20.o board.o clock.o pinmux.o sys_info.o timer.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))
diff --git a/arch/arm/cpu/armv7/tegra2/pinmux.c b/arch/arm/cpu/armv7/tegra2/pinmux.c
new file mode 100644
index 0000000..5594ab8
--- /dev/null
+++ b/arch/arm/cpu/armv7/tegra2/pinmux.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * 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
+ */
+
+/* Tegra2 pin multiplexing functions */
+
+#include <asm/io.h>
+#include <asm/arch/tegra2.h>
+#include <asm/arch/pinmux.h>
+#include <common.h>
+
+
+void pinmux_set_tristate(enum pmux_pin pin, int enable)
+{
+	struct pmux_tri_ctlr *pmt = (struct pmux_tri_ctlr *)NV_PA_APB_MISC_BASE;
+	u32 *tri = &pmt->pmt_tri[TRISTATE_REG(pin)];
+	u32 reg;
+
+	reg = readl(tri);
+	if (enable)
+		reg |= TRISTATE_MASK(pin);
+	else
+		reg &= ~TRISTATE_MASK(pin);
+	writel(reg, tri);
+}
+
+void pinmux_tristate_enable(enum pmux_pin pin)
+{
+	pinmux_set_tristate(pin, 1);
+}
+
+void pinmux_tristate_disable(enum pmux_pin pin)
+{
+	pinmux_set_tristate(pin, 0);
+}
-- 
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