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 /arch/arm/mach-ixp4xx/common.c | |
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 'arch/arm/mach-ixp4xx/common.c')
-rw-r--r-- | arch/arm/mach-ixp4xx/common.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c index 45068c3d8dcc..39f2eeb219b4 100644 --- a/arch/arm/mach-ixp4xx/common.c +++ b/arch/arm/mach-ixp4xx/common.c | |||
@@ -102,6 +102,29 @@ static signed char irq2gpio[32] = { | |||
102 | 7, 8, 9, 10, 11, 12, -1, -1, | 102 | 7, 8, 9, 10, 11, 12, -1, -1, |
103 | }; | 103 | }; |
104 | 104 | ||
105 | int gpio_to_irq(int gpio) | ||
106 | { | ||
107 | int irq; | ||
108 | |||
109 | for (irq = 0; irq < 32; irq++) { | ||
110 | if (irq2gpio[irq] == gpio) | ||
111 | return irq; | ||
112 | } | ||
113 | return -EINVAL; | ||
114 | } | ||
115 | EXPORT_SYMBOL(gpio_to_irq); | ||
116 | |||
117 | int irq_to_gpio(int irq) | ||
118 | { | ||
119 | int gpio = (irq < 32) ? irq2gpio[irq] : -EINVAL; | ||
120 | |||
121 | if (gpio == -1) | ||
122 | return -EINVAL; | ||
123 | |||
124 | return gpio; | ||
125 | } | ||
126 | EXPORT_SYMBOL(irq_to_gpio); | ||
127 | |||
105 | static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type) | 128 | static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type) |
106 | { | 129 | { |
107 | int line = irq2gpio[irq]; | 130 | int line = irq2gpio[irq]; |