diff options
| author | Milan Svoboda <msvoboda@ra.rockwell.com> | 2007-03-21 14:04:08 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-04-21 20:51:42 +0100 |
| commit | 25735d10ba477d5128b1e5ccef42062bea429075 (patch) | |
| tree | 0307fa07e1443ebe0de45c637c85d6e7cb03539b /arch/arm | |
| 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')
| -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 45068c3d8dc..39f2eeb219b 100644 --- a/arch/arm/mach-ixp4xx/common.c +++ b/arch/arm/mach-ixp4xx/common.c @@ -102,6 +102,29 @@ static signed char irq2gpio[32] = { 7, 8, 9, 10, 11, 12, -1, -1, }; +int gpio_to_irq(int gpio) +{ + int irq; + + for (irq = 0; irq < 32; irq++) { + if (irq2gpio[irq] == gpio) + return irq; + } + return -EINVAL; +} +EXPORT_SYMBOL(gpio_to_irq); + +int irq_to_gpio(int irq) +{ + int gpio = (irq < 32) ? irq2gpio[irq] : -EINVAL; + + if (gpio == -1) + return -EINVAL; + + return gpio; +} +EXPORT_SYMBOL(irq_to_gpio); + static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type) { int line = irq2gpio[irq]; |