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[ARM] 4432/5: davinci: pin mux support

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Support pin multiplexing configurations driver for TI DaVinci SoC

Signed-off-by: Vladimir Barinov <vbarinov@ru.mvista.com>
Acked-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Vladimir Barinov
2007-07-10 13:10:04 +01:00
committed by Russell King
parent 3d9edf09d4
commit 83f53220f8
4 changed files with 154 additions and 31 deletions
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41
arch/arm/mach-davinci/mux.c Normal file
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/*
* 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 <asm/hardware.h>
#include <asm/arch/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);
}