diff options
author | Milan Svoboda <msvoboda@ra.rockwell.com> | 2007-03-21 09:04:08 -0400 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-04-21 15:51:42 -0400 |
commit | 25735d10ba477d5128b1e5ccef42062bea429075 (patch) | |
tree | 0307fa07e1443ebe0de45c637c85d6e7cb03539b /include | |
parent | 235b185ce47ce64793362bd3ae4bcd8afc6b57b8 (diff) |
[ARM] 4275/1: generic gpio layer for ixp4xx
This patch brings generic gpio layer support to ixp4xx. It creates
functions needed for gpio->irq and irq->gpio translation.
It expects and initial value to be passed to
gpio_direction_output() which has been introduced by
commit 28735a7253a6c24364765e80a5428b4a151fccc2 in Linus git tree.
Generic gpio layer is going to be used by pxa2xx_udc driver.
Signed-off-by: Milan Svoboda <msvoboda@ra.rockwell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include')
-rw-r--r-- | include/asm-arm/arch-ixp4xx/gpio.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/include/asm-arm/arch-ixp4xx/gpio.h b/include/asm-arm/arch-ixp4xx/gpio.h new file mode 100644 index 000000000000..3a4c5b8ae9e1 --- /dev/null +++ b/include/asm-arm/arch-ixp4xx/gpio.h | |||
@@ -0,0 +1,73 @@ | |||
1 | /* | ||
2 | * linux/include/asm-arm/arch-ixp4xx/gpio.h | ||
3 | * | ||
4 | * IXP4XX GPIO wrappers for arch-neutral GPIO calls | ||
5 | * | ||
6 | * Written by Milan Svoboda <msvoboda@ra.rockwell.com> | ||
7 | * Based on PXA implementation by Philipp Zabel <philipp.zabel@gmail.com> | ||
8 | * | ||
9 | * This program is free software; you can redistribute it and/or modify | ||
10 | * it under the terms of the GNU General Public License as published by | ||
11 | * the Free Software Foundation; either version 2 of the License, or | ||
12 | * (at your option) any later version. | ||
13 | * | ||
14 | * This program is distributed in the hope that it will be useful, | ||
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
17 | * GNU General Public License for more details. | ||
18 | * | ||
19 | * You should have received a copy of the GNU General Public License | ||
20 | * along with this program; if not, write to the Free Software | ||
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
22 | * | ||
23 | */ | ||
24 | |||
25 | #ifndef __ASM_ARCH_IXP4XX_GPIO_H | ||
26 | #define __ASM_ARCH_IXP4XX_GPIO_H | ||
27 | |||
28 | #include <asm/hardware.h> | ||
29 | |||
30 | static inline int gpio_request(unsigned gpio, const char *label) | ||
31 | { | ||
32 | return 0; | ||
33 | } | ||
34 | |||
35 | static inline void gpio_free(unsigned gpio) | ||
36 | { | ||
37 | return; | ||
38 | } | ||
39 | |||
40 | static inline int gpio_direction_input(unsigned gpio) | ||
41 | { | ||
42 | gpio_line_config(gpio, IXP4XX_GPIO_IN); | ||
43 | return 0; | ||
44 | } | ||
45 | |||
46 | static inline int gpio_direction_output(unsigned gpio, int level) | ||
47 | { | ||
48 | gpio_line_set(gpio, level); | ||
49 | gpio_line_config(gpio, IXP4XX_GPIO_OUT); | ||
50 | return 0; | ||
51 | } | ||
52 | |||
53 | static inline int gpio_get_value(unsigned gpio) | ||
54 | { | ||
55 | int value; | ||
56 | |||
57 | gpio_line_get(gpio, &value); | ||
58 | |||
59 | return value; | ||
60 | } | ||
61 | |||
62 | static inline void gpio_set_value(unsigned gpio, int value) | ||
63 | { | ||
64 | gpio_line_set(gpio, value); | ||
65 | } | ||
66 | |||
67 | #include <asm-generic/gpio.h> /* cansleep wrappers */ | ||
68 | |||
69 | extern int gpio_to_irq(int gpio); | ||
70 | extern int irq_to_gpio(int gpio); | ||
71 | |||
72 | #endif | ||
73 | |||