[PATCH 3/8 v2] ARM: iop32x: read N2100 power key using gpiolib
From: Linus Walleij <hidden>
Date: 2013-09-13 08:02:22
Also in:
linux-gpio
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Refrain from using the custom gpio_line_get() to read the power key on the N2100, use the gpiolib function gpio_get() instead. Also request the line in the GPIOs initicall, and move the poll timer setup to that inicall so the gpio chip is available before we request this GPIO and start to poll it. Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Dan Williams <redacted> Cc: Mikael Pettersson <redacted> Signed-off-by: Linus Walleij <redacted> --- ChangeLog v1->v2: - Move the setup and poll init into the new GPIO initialization function to avoid probe order problems. --- arch/arm/mach-iop32x/n2100.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/arch/arm/mach-iop32x/n2100.c b/arch/arm/mach-iop32x/n2100.c
index 2dba955..dc5addf 100644
--- a/arch/arm/mach-iop32x/n2100.c
+++ b/arch/arm/mach-iop32x/n2100.c@@ -306,7 +306,7 @@ static struct timer_list power_button_poll_timer; static void power_button_poll(unsigned long dummy) { - if (gpio_line_get(N2100_POWER_BUTTON) == 0) { + if (gpio_get_value(N2100_POWER_BUTTON) == 0) { ctrl_alt_del(); return; }
@@ -322,6 +322,19 @@ static int __init n2100_request_gpios(void) ret = gpio_request(N2100_HARDWARE_RESET, "reset"); if (ret) pr_err("could not request reset GPIO\n"); + ret = gpio_request(N2100_POWER_BUTTON, "power"); + if (ret) + pr_err("could not request power GPIO\n"); + else { + ret = gpio_direction_input(N2100_POWER_BUTTON); + if (ret) + pr_err("could not set power GPIO as input\n"); + } + /* Set up power button poll timer */ + init_timer(&power_button_poll_timer); + power_button_poll_timer.function = power_button_poll; + power_button_poll_timer.expires = jiffies + (HZ / 10); + add_timer(&power_button_poll_timer); return 0; } device_initcall(n2100_request_gpios);
@@ -338,11 +351,6 @@ static void __init n2100_init_machine(void) ARRAY_SIZE(n2100_i2c_devices)); pm_power_off = n2100_power_off; - - init_timer(&power_button_poll_timer); - power_button_poll_timer.function = power_button_poll; - power_button_poll_timer.expires = jiffies + (HZ / 10); - add_timer(&power_button_poll_timer); } MACHINE_START(N2100, "Thecus N2100")
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1.8.3.1