summaryrefslogtreecommitdiff
path: root/include/linux/nsc_gpio.h
blob: 3ad8ae9dcb5a142d13b35642b9276b54e963643c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
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);
};