projects / mirror_ubuntu-focal-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| c4982887 | 2 | * include/asm-arm/arch-ixp2000/gpio.h |
| 1da177e4 LT |
3 | * |
| 4 | * Copyright (C) 2002 Intel Corporation. | |
| 5 | * | |
| 6 | * This program is free software, you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 11 | /* | |
| 12 | * IXP2000 GPIO in/out, edge/level detection for IRQs: | |
| 13 | * IRQs are generated on Falling-edge, Rising-Edge, Level-low, Level-High | |
| 14 | * or both Falling-edge and Rising-edge. | |
| 15 | * This must be called *before* the corresponding IRQ is registerd. | |
| 16 | * Use this instead of directly setting the GPIO registers. | |
| 17 | * GPIOs may also be used as GPIOs (e.g. for emulating i2c/smb) | |
| 18 | */ | |
| c4982887 LB |
19 | #ifndef __ASM_ARCH_GPIO_H |
| 20 | #define __ASM_ARCH_GPIO_H | |
| 1da177e4 LT |
21 | |
| 22 | #ifndef __ASSEMBLY__ | |
| c4982887 LB |
23 | |
| 24 | #define GPIO_IN 0 | |
| 25 | #define GPIO_OUT 1 | |
| 1da177e4 LT |
26 | |
| 27 | #define IXP2000_GPIO_LOW 0 | |
| 28 | #define IXP2000_GPIO_HIGH 1 | |
| 29 | ||
| c4982887 | 30 | extern void gpio_line_config(int line, int direction); |
| 1da177e4 LT |
31 | |
| 32 | static inline int gpio_line_get(int line) | |
| 33 | { | |
| 34 | return (((*IXP2000_GPIO_PLR) >> line) & 1); | |
| 35 | } | |
| 36 | ||
| 37 | static inline void gpio_line_set(int line, int value) | |
| 38 | { | |
| 39 | if (value == IXP2000_GPIO_HIGH) { | |
| c4982887 LB |
40 | ixp2000_reg_write(IXP2000_GPIO_POSR, 1 << line); |
| 41 | } else if (value == IXP2000_GPIO_LOW) { | |
| 42 | ixp2000_reg_write(IXP2000_GPIO_POCR, 1 << line); | |
| 43 | } | |
| 1da177e4 LT |
44 | } |
| 45 | ||
| 46 | #endif /* !__ASSEMBLY__ */ | |
| 1da177e4 | 47 | |
| c4982887 | 48 | #endif /* ASM_ARCH_IXP2000_GPIO_H_ */ |