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83f53220 VB |
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 | ||
a09e64fb | 14 | #include <mach/hardware.h> |
83f53220 | 15 | |
a09e64fb | 16 | #include <mach/mux.h> |
83f53220 VB |
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 | } |