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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 /arch
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 'arch')
-rw-r--r--arch/arm/mach-ixp4xx/common.c23
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
105int 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}
115EXPORT_SYMBOL(gpio_to_irq);
116
117int 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}
126EXPORT_SYMBOL(irq_to_gpio);
127
105static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type) 128static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type)
106{ 129{
107 int line = irq2gpio[irq]; 130 int line = irq2gpio[irq];