From fe3a168a2ce1c93837cdf8fe27a3e67795155f90 Mon Sep 17 00:00:00 2001 From: Jim Cromie Date: Tue, 27 Jun 2006 02:54:18 -0700 Subject: [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/nsc_gpio.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 include/linux/nsc_gpio.h (limited to 'include/linux/nsc_gpio.h') 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 @@ +/** + 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 + + 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); +}; + -- cgit v1.2.3