4 National Semiconductor GPIO common access methods.
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
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.
16 Copyright (c) 2005 Jim Cromie <jim.cromie@gmail.com>
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.
24 u32 (*gpio_config
) (unsigned iminor
, u32 mask
, u32 bits
);
25 void (*gpio_dump
) (struct nsc_gpio_ops
*amp
, unsigned iminor
);
26 int (*gpio_get
) (unsigned iminor
);
27 void (*gpio_set
) (unsigned iminor
, int state
);
28 void (*gpio_change
) (unsigned iminor
);
29 int (*gpio_current
) (unsigned iminor
);
30 struct device
* dev
; /* for dev_dbg() support, set in init */
33 extern ssize_t
nsc_gpio_write(struct file
*file
, const char __user
*data
,
34 size_t len
, loff_t
*ppos
);
36 extern ssize_t
nsc_gpio_read(struct file
*file
, char __user
*buf
,
37 size_t len
, loff_t
*ppos
);
39 extern void nsc_gpio_dump(struct nsc_gpio_ops
*amp
, unsigned index
);
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