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| author | Jim Cromie <jim.cromie@gmail.com> | 2006-06-27 02:54:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-27 17:32:42 -0700 |
| commit | fe3a168a2ce1c93837cdf8fe27a3e67795155f90 (patch) | |
| tree | 798eaa66b5e95756e800132602ace5f5c00aa3b0 /include/linux/nsc_gpio.h | |
| parent | 9b170b8fdbd14a197ad26b4354f3810c65a96602 (diff) | |
| download | linux-fe3a168a2ce1c93837cdf8fe27a3e67795155f90.tar.gz linux-fe3a168a2ce1c93837cdf8fe27a3e67795155f90.tar.bz2 linux-fe3a168a2ce1c93837cdf8fe27a3e67795155f90.zip | |
[PATCH] chardev: GPIO for SCx200 & PC-8736x: add gpio-ops vtable
Abstract the gpio operations into a new nsc_gpio_ops vtable.
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/nsc_gpio.h')
| -rw-r--r-- | include/linux/nsc_gpio.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/nsc_gpio.h b/include/linux/nsc_gpio.h new file mode 100644 index 000000000000..3ad8ae9dcb5a --- /dev/null +++ b/include/linux/nsc_gpio.h @@ -0,0 +1,33 @@ +/** + nsc_gpio.c + + National Semiconductor GPIO common access methods. + + struct nsc_gpio_ops abstracts the low-level access + operations for the GPIO units on 2 NSC chip families; the GEODE + integrated CPU, and the PC-8736[03456] integrated PC-peripheral + chips. + + The GPIO units on these chips have the same pin architecture, but + the access methods differ. Thus, scx200_gpio and pc8736x_gpio + implement their own versions of these routines; and use the common + file-operations routines implemented in nsc_gpio module. + + Copyright (c) 2005 Jim Cromie <jim.cromie@gmail.com> + + NB: this work was tested on the Geode SC-1100 and PC-87366 chips. + NSC sold the GEODE line to AMD, and the PC-8736x line to Winbond. +*/ + +struct nsc_gpio_ops { + struct module* owner; + u32 (*gpio_config) (unsigned iminor, u32 mask, u32 bits); + void (*gpio_dump) (unsigned iminor); + int (*gpio_get) (unsigned iminor); + void (*gpio_set) (unsigned iminor, int state); + void (*gpio_set_high)(unsigned iminor); + void (*gpio_set_low) (unsigned iminor); + void (*gpio_change) (unsigned iminor); + int (*gpio_current) (unsigned iminor); +}; + |