/* SPDX-License-Identifier: GPL-2.0 */
/**
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 - 8736 x line to Winbond .
*/
struct nsc_gpio_ops {
struct module* owner;
u32 (*gpio_config) (unsigned iminor, u32 mask, u32 bits);
void (*gpio_dump) (struct nsc_gpio_ops *amp, unsigned iminor);
int (*gpio_get) (unsigned iminor);
void (*gpio_set) (unsigned iminor, int state);
void (*gpio_change) (unsigned iminor);
int (*gpio_current) (unsigned iminor);
struct device* dev; /* for dev_dbg() support, set in init */
};
extern ssize_t nsc_gpio_write(struct file *file, const char __user *data,
size_t len, loff_t *ppos);
extern ssize_t nsc_gpio_read(struct file *file, char __user *buf,
size_t len, loff_t *ppos);
extern void nsc_gpio_dump(struct nsc_gpio_ops *amp, unsigned index);
Messung V0.5 in Prozent C=94 H=100 G=96
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(vorverarbeitet am 2026-09-27)
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