1 files changed, 87 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/mux.c b/arch/arm/plat-omap/mux.c
new file mode 100644
index 00000000..0d4aa0d5
--- /dev/null
+++ b/arch/arm/plat-omap/mux.c
@@ -0,0 +1,87 @@
+/*
+ * linux/arch/arm/plat-omap/mux.c
+ *
+ * Utility to set the Omap MUX and PULL_DWN registers from a table in mux.h
+ *
+ * Copyright (C) 2003 - 2008 Nokia Corporation
+ *
+ * Written by Tony Lindgren
+ *
+ * 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 <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <asm/system.h>
+#include <linux/spinlock.h>
+#include <plat/mux.h>
+
+#ifdef CONFIG_OMAP_MUX
+
+static struct omap_mux_cfg *mux_cfg;
+
+int __init omap_mux_register(struct omap_mux_cfg *arch_mux_cfg)
+{
+	if (!arch_mux_cfg || !arch_mux_cfg->pins || arch_mux_cfg->size == 0
+			|| !arch_mux_cfg->cfg_reg) {
+		printk(KERN_ERR "Invalid pin table\n");
+		return -EINVAL;
+	}
+
+	mux_cfg = arch_mux_cfg;
+
+	return 0;
+}
+
+/*
+ * Sets the Omap MUX and PULL_DWN registers based on the table
+ */
+int __init_or_module omap_cfg_reg(const unsigned long index)
+{
+	struct pin_config *reg;
+
+	if (!cpu_class_is_omap1()) {
+		printk(KERN_ERR "mux: Broken omap_cfg_reg(%lu) entry\n",
+				index);
+		WARN_ON(1);
+		return -EINVAL;
+	}
+
+	if (mux_cfg == NULL) {
+		printk(KERN_ERR "Pin mux table not initialized\n");
+		return -ENODEV;
+	}
+
+	if (index >= mux_cfg->size) {
+		printk(KERN_ERR "Invalid pin mux index: %lu (%lu)\n",
+		       index, mux_cfg->size);
+		dump_stack();
+		return -ENODEV;
+	}
+
+	reg = (struct pin_config *)&mux_cfg->pins[index];
+
+	if (!mux_cfg->cfg_reg)
+		return -ENODEV;
+
+	return mux_cfg->cfg_reg(reg);
+}
+EXPORT_SYMBOL(omap_cfg_reg);
+#else
+#define omap_mux_init() do {} while(0)
+#define omap_cfg_reg(x)	do {} while(0)
+#endif	/* CONFIG_OMAP_MUX */