diff options
| author | Vladimir Barinov <vbarinov@ru.mvista.com> | 2007-07-10 16:10:04 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-07-12 12:57:09 +0400 |
| commit | 83f53220f8313f097cdf181928be13bafbb697ea (patch) | |
| tree | eb8b019e5b6d8f38ae62daf46774787fd7e761d1 /arch/arm/mach-davinci/mux.c | |
| parent | 3d9edf09d4525dad95f98b31f31aa86b8071fab9 (diff) | |
| download | linux-83f53220f8313f097cdf181928be13bafbb697ea.tar.xz | |
[ARM] 4432/5: davinci: pin mux support
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>
Diffstat (limited to 'arch/arm/mach-davinci/mux.c')
| -rw-r--r-- | arch/arm/mach-davinci/mux.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/mux.c b/arch/arm/mach-davinci/mux.c new file mode 100644 index 000000000000..92d26bd305b7 --- /dev/null +++ b/arch/arm/mach-davinci/mux.c @@ -0,0 +1,41 @@ +/* + * 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); +} |