2 * linux/arch/arm/plat-omap/mux.c
4 * Utility to set the Omap MUX and PULL_DWN registers from a table in mux.h
6 * Copyright (C) 2003 - 2008 Nokia Corporation
8 * Written by Tony Lindgren
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <asm/system.h>
30 #include <linux/spinlock.h>
31 #include <asm/arch/mux.h>
33 #ifdef CONFIG_OMAP_MUX
35 static struct omap_mux_cfg *mux_cfg;
37 int __init omap_mux_register(struct omap_mux_cfg *arch_mux_cfg)
39 if (!arch_mux_cfg || !arch_mux_cfg->pins || arch_mux_cfg->size == 0
40 || !arch_mux_cfg->cfg_reg) {
41 printk(KERN_ERR "Invalid pin table\n");
45 mux_cfg = arch_mux_cfg;
51 * Sets the Omap MUX and PULL_DWN registers based on the table
53 int __init_or_module omap_cfg_reg(const unsigned long index)
55 struct pin_config *reg;
57 if (mux_cfg == NULL) {
58 printk(KERN_ERR "Pin mux table not initialized\n");
62 if (index >= mux_cfg->size) {
63 printk(KERN_ERR "Invalid pin mux index: %lu (%lu)\n",
64 index, mux_cfg->size);
69 reg = (struct pin_config *)&mux_cfg->pins[index];
71 if (!mux_cfg->cfg_reg)
74 return mux_cfg->cfg_reg(reg);
76 EXPORT_SYMBOL(omap_cfg_reg);
78 #define omap_mux_init() do {} while(0)
79 #define omap_cfg_reg(x) do {} while(0)
80 #endif /* CONFIG_OMAP_MUX */