1 /* 2 * DaVinci pin multiplexing configurations 3 * 4 * Author: Vladimir Barinov, MontaVista Software, Inc. <source@mvista.com> 5 * 6 * 2007 (c) MontaVista Software, Inc. This file is licensed under 7 * the terms of the GNU General Public License version 2. This program 8 * is licensed "as is" without any warranty of any kind, whether express 9 * or implied. 10 */ 11 #include <linux/io.h> 12 #include <linux/spinlock.h> 13 14 #include <mach/hardware.h> 15 16 #include <mach/mux.h> 17 18 /* System control register offsets */ 19 #define PINMUX0 0x00 20 #define PINMUX1 0x04 21 22 static DEFINE_SPINLOCK(mux_lock); 23 24 void davinci_mux_peripheral(unsigned int mux, unsigned int enable) 25 { 26 u32 pinmux, muxreg = PINMUX0; 27 28 if (mux >= DAVINCI_MUX_LEVEL2) { 29 muxreg = PINMUX1; 30 mux -= DAVINCI_MUX_LEVEL2; 31 } 32 33 spin_lock(&mux_lock); 34 pinmux = davinci_readl(DAVINCI_SYSTEM_MODULE_BASE + muxreg); 35 if (enable) 36 pinmux |= (1 << mux); 37 else 38 pinmux &= ~(1 << mux); 39 davinci_writel(pinmux, DAVINCI_SYSTEM_MODULE_BASE + muxreg); 40 spin_unlock(&mux_lock); 41 } 42