| /* |
| * 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 <asm/system.h> |
| #include <asm/io.h> |
| #include <linux/spinlock.h> |
| #include <mach/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 (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 */ |