Commit 7111f878 authored by Linus Walleij's avatar Linus Walleij

ARM: iop32x: request and issue reset using gpio

As the IOP GPIO driver supports gpiolib we can use the standard
GPIO calls to issue a reset of the machine instead of using the
custom gpio_line_set/config calls. Also request the GPIO when
initializing the machine.

Cc: Lennert Buytenhek <>
Cc: Dan Williams <>
Cc: Mikael Pettersson <>
Tested-by: default avatarAaro Koskinen <>
Signed-off-by: default avatarLinus Walleij <>
parent e9004f50
......@@ -30,6 +30,7 @@
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach/arch.h>
......@@ -288,8 +289,14 @@ static void n2100_power_off(void)
static void n2100_restart(enum reboot_mode mode, const char *cmd)
gpio_line_set(N2100_HARDWARE_RESET, GPIO_LOW);
gpio_line_config(N2100_HARDWARE_RESET, GPIO_OUT);
int ret;
ret = gpio_direction_output(N2100_HARDWARE_RESET, 0);
if (ret) {
pr_crit("could not drive reset GPIO low\n");
/* Wait for reset to happen */
while (1)
......@@ -308,6 +315,19 @@ static void power_button_poll(unsigned long dummy)
static int __init n2100_request_gpios(void)
int ret;
if (!machine_is_n2100())
return 0;
ret = gpio_request(N2100_HARDWARE_RESET, "reset");
if (ret)
pr_err("could not request reset GPIO\n");
return 0;
static void __init n2100_init_machine(void)
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment