Commit | Line | Data |
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7fdda678 MD |
1 | /* |
2 | * Generic GPIO API and pinmux table support | |
3 | * | |
4 | * Copyright (c) 2008 Magnus Damm | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file "COPYING" in the main directory of this archive | |
8 | * for more details. | |
9 | */ | |
10 | #ifndef __ASM_ARCH_GPIO_H | |
11 | #define __ASM_ARCH_GPIO_H | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/errno.h> | |
4f3d7f65 | 15 | #include <linux/io.h> |
7fdda678 | 16 | |
4f3d7f65 KM |
17 | /* |
18 | * FIXME !! | |
19 | * | |
20 | * current gpio frame work doesn't have | |
21 | * the method to control only pull up/down/free. | |
22 | * this function should be replaced by correct gpio function | |
23 | */ | |
0a4b04dc | 24 | static inline void __init gpio_direction_none(void __iomem * addr) |
4f3d7f65 KM |
25 | { |
26 | __raw_writeb(0x00, addr); | |
27 | } | |
28 | ||
0a4b04dc | 29 | static inline void __init gpio_request_pullup(void __iomem * addr) |
4f3d7f65 KM |
30 | { |
31 | u8 data = __raw_readb(addr); | |
32 | ||
33 | data &= 0x0F; | |
34 | data |= 0xC0; | |
35 | __raw_writeb(data, addr); | |
36 | } | |
37 | ||
0a4b04dc | 38 | static inline void __init gpio_request_pulldown(void __iomem * addr) |
4f3d7f65 KM |
39 | { |
40 | u8 data = __raw_readb(addr); | |
41 | ||
42 | data &= 0x0F; | |
43 | data |= 0xA0; | |
44 | ||
45 | __raw_writeb(data, addr); | |
46 | } | |
47 | ||
7fdda678 | 48 | #endif /* __ASM_ARCH_GPIO_H */ |