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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>
This commit is contained in:
David Brownell 2008-09-06 20:19:02 -07:00 committed by Haavard Skinnemoen
parent 7066412488
commit 96706600de
1 changed files with 10 additions and 0 deletions
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10
arch/avr32/boards/atngw100/setup.c
View File

@ -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.
*/