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authorJim Cromie <jim.cromie@gmail.com>2006-06-27 05:54:18 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-27 20:32:42 -0400
commitfe3a168a2ce1c93837cdf8fe27a3e67795155f90 (patch)
tree798eaa66b5e95756e800132602ace5f5c00aa3b0 /include
parent9b170b8fdbd14a197ad26b4354f3810c65a96602 (diff)
[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')
-rw-r--r--include/linux/nsc_gpio.h33
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 @@
1/**
2 nsc_gpio.c
3
4 National Semiconductor GPIO common access methods.
5
6 struct nsc_gpio_ops abstracts the low-level access
7 operations for the GPIO units on 2 NSC chip families; the GEODE
8 integrated CPU, and the PC-8736[03456] integrated PC-peripheral
9 chips.
10
11 The GPIO units on these chips have the same pin architecture, but
12 the access methods differ. Thus, scx200_gpio and pc8736x_gpio
13 implement their own versions of these routines; and use the common
14 file-operations routines implemented in nsc_gpio module.
15
16 Copyright (c) 2005 Jim Cromie <jim.cromie@gmail.com>
17
18 NB: this work was tested on the Geode SC-1100 and PC-87366 chips.
19 NSC sold the GEODE line to AMD, and the PC-8736x line to Winbond.
20*/
21
22struct nsc_gpio_ops {
23 struct module* owner;
24 u32 (*gpio_config) (unsigned iminor, u32 mask, u32 bits);
25 void (*gpio_dump) (unsigned iminor);
26 int (*gpio_get) (unsigned iminor);
27 void (*gpio_set) (unsigned iminor, int state);
28 void (*gpio_set_high)(unsigned iminor);
29 void (*gpio_set_low) (unsigned iminor);
30 void (*gpio_change) (unsigned iminor);
31 int (*gpio_current) (unsigned iminor);
32};
33