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Sourcecode: linux-2.6 version File versions

mux.c

/*
 * 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 <mach/hardware.h>

#include <mach/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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