diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /include/linux/nsc_gpio.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/linux/nsc_gpio.h')
-rw-r--r-- | include/linux/nsc_gpio.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/include/linux/nsc_gpio.h b/include/linux/nsc_gpio.h new file mode 100644 index 000000000..d7a04a6e3 --- /dev/null +++ b/include/linux/nsc_gpio.h @@ -0,0 +1,41 @@ +/* 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-8736x 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); + |