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authorMilan Svoboda <msvoboda@ra.rockwell.com>2007-03-21 09:04:08 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-04-21 15:51:42 -0400
commit25735d10ba477d5128b1e5ccef42062bea429075 (patch)
tree0307fa07e1443ebe0de45c637c85d6e7cb03539b /include
parent235b185ce47ce64793362bd3ae4bcd8afc6b57b8 (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.h73
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
30static inline int gpio_request(unsigned gpio, const char *label)
31{
32 return 0;
33}
34
35static inline void gpio_free(unsigned gpio)
36{
37 return;
38}
39
40static inline int gpio_direction_input(unsigned gpio)
41{
42 gpio_line_config(gpio, IXP4XX_GPIO_IN);
43 return 0;
44}
45
46static 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
53static inline int gpio_get_value(unsigned gpio)
54{
55 int value;
56
57 gpio_line_get(gpio, &value);
58
59 return value;
60}
61
62static 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
69extern int gpio_to_irq(int gpio);
70extern int irq_to_gpio(int gpio);
71
72#endif
73