mirror of https://gitee.com/openkylin/linux.git
43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
/*
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* DaVinci pin multiplexing configurations
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*
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* Author: Vladimir Barinov, MontaVista Software, Inc. <source@mvista.com>
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*
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* 2007 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <mach/hardware.h>
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#include <mach/mux.h>
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/* System control register offsets */
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#define PINMUX0 0x00
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#define PINMUX1 0x04
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static DEFINE_SPINLOCK(mux_lock);
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void davinci_mux_peripheral(unsigned int mux, unsigned int enable)
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{
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void __iomem *base = IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE);
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u32 pinmux, muxreg = PINMUX0;
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if (mux >= DAVINCI_MUX_LEVEL2) {
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muxreg = PINMUX1;
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mux -= DAVINCI_MUX_LEVEL2;
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}
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spin_lock(&mux_lock);
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pinmux = __raw_readl(base + muxreg);
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if (enable)
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pinmux |= (1 << mux);
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else
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pinmux &= ~(1 << mux);
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__raw_writel(pinmux, base + muxreg);
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spin_unlock(&mux_lock);
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}
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