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| author | Paul Mackerras <paulus@samba.org> | 2006-02-24 14:05:47 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-02-24 14:05:47 +1100 |
| commit | a00428f5b149e36b8225b2a0812742a6dfb07b8c (patch) | |
| tree | a78869cd67cf78a0eb091fb0ea5d397734bd6738 /arch/arm/mach-at91rm9200/gpio.c | |
| parent | 774fee58c465ea1c7e9775e347ec307bcf2deeb3 (diff) | |
| parent | fb5c594c2acc441f0d2d8f457484a0e0e9285db3 (diff) | |
| download | linux-a00428f5b149e36b8225b2a0812742a6dfb07b8c.tar.gz | |
Merge ../powerpc-merge
Diffstat (limited to 'arch/arm/mach-at91rm9200/gpio.c')
| -rw-r--r-- | arch/arm/mach-at91rm9200/gpio.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/mach-at91rm9200/gpio.c b/arch/arm/mach-at91rm9200/gpio.c index 2fd2ef583e4d4f..a9f718bf8ba873 100644 --- a/arch/arm/mach-at91rm9200/gpio.c +++ b/arch/arm/mach-at91rm9200/gpio.c @@ -159,6 +159,23 @@ int __init_or_module at91_set_deglitch(unsigned pin, int is_on) } EXPORT_SYMBOL(at91_set_deglitch); +/* + * enable/disable the multi-driver; This is only valid for output and + * allows the output pin to run as an open collector output. + */ +int __init_or_module at91_set_multi_drive(unsigned pin, int is_on) +{ + void __iomem *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + if (!pio) + return -EINVAL; + + __raw_writel(mask, pio + (is_on ? PIO_MDER : PIO_MDDR)); + return 0; +} +EXPORT_SYMBOL(at91_set_multi_drive); + /*--------------------------------------------------------------------------*/ |