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authorArnaud Patard (Rtp) <arnaud.patard@rtp-net.org>2010-11-26 15:20:52 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2010-12-03 11:05:16 +0100
commit96886c4361f1ae3f6c775d7c9295e2d557101d0f (patch)
treef3101c9303ed759ab5660985291366619a8e8fd9 /arch/arm/plat-mxc
parentb99545cb59dc0a55507100a1335f4fd0ed521032 (diff)
iMX51: introduce IMX_GPIO_NR
Currently, to define a GPIO number, we're using something like : #define EFIKAMX_PCBID0 (2*32 + 16) to define GPIO 3 16. This is not really readable and it's error prone imho (note the 3 vs 2). So, I'm introducing a new macro to define this in a better way. Now, the code sample become : #define EFIKAMX_PCBID0 IMX_GPIO_NR(3, 16) v2: - move to gpio.h - add parens & spaces - switch to IMX_GPIO_NR instead of MX51_GPIO_NR Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Cc: Amit Kucheria <amit.kucheria@linaro.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Eric BĂ©nard <eric@eukrea.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/plat-mxc')
-rw-r--r--arch/arm/plat-mxc/include/mach/gpio.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/include/mach/gpio.h b/arch/arm/plat-mxc/include/mach/gpio.h
index af33b74f569..0044e2f1bea 100644
--- a/arch/arm/plat-mxc/include/mach/gpio.h
+++ b/arch/arm/plat-mxc/include/mach/gpio.h
@@ -23,6 +23,11 @@
#include <mach/hardware.h>
#include <asm-generic/gpio.h>
+
+/* There's a off-by-one betweem the gpio bank number and the gpiochip */
+/* range e.g. GPIO_1_5 is gpio 5 under linux */
+#define IMX_GPIO_NR(bank, nr) (((bank) - 1) * 32 + (nr))
+
/* use gpiolib dispatchers */
#define gpio_get_value __gpio_get_value
#define gpio_set_value __gpio_set_value