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authorDavid Brownell <dbrownell@users.sourceforge.net>2008-09-06 20:19:02 -0700
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-09-22 09:51:01 +0200
commit96706600de83966812b01a3cb310a13da2a1a4e9 (patch)
tree808954056fbfa9e5f98aa103068abbb9a1109416 /arch/avr32
parent7066412488281fd1c201dceb22a0dfe467012f76 (diff)
ngw100: export J15 through sysfs
The NGW100 board has jumper J15 (near the reset button) which is unused. This patch exports it through the GPIO sysfs support (as /sys/class/gpio/gpio62/value) so that it's easily queried by boot scripts or whatever might want to know if the jumper has been installed (value = 0) or not (value = 1, "default"). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> [haavard.skinnemoen@atmel.com: add missing include] Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32')
-rw-r--r--arch/avr32/boards/atngw100/setup.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/avr32/boards/atngw100/setup.c b/arch/avr32/boards/atngw100/setup.c
index b8286f1ce85..abcb0d9559b 100644
--- a/arch/avr32/boards/atngw100/setup.c
+++ b/arch/avr32/boards/atngw100/setup.c
@@ -9,6 +9,7 @@
*/
#include <linux/clk.h>
#include <linux/etherdevice.h>
+#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
@@ -204,6 +205,15 @@ postcore_initcall(atngw100_init);
static int __init atngw100_arch_init(void)
{
+ /* PB30 is the otherwise unused jumper on the mainboard, with an
+ * external pullup; the jumper grounds it. Use it however you
+ * like, including letting U-Boot or Linux tweak boot sequences.
+ */
+ at32_select_gpio(GPIO_PIN_PB(30), 0);
+ gpio_request(GPIO_PIN_PB(30), "j15");
+ gpio_direction_input(GPIO_PIN_PB(30));
+ gpio_export(GPIO_PIN_PB(30), false);
+
/* set_irq_type() after the arch_initcall for EIC has run, and
* before the I2C subsystem could try using this IRQ.
*/