+++ /dev/null
-From 6261e59795d861f21f63878944900a3da713348c Mon Sep 17 00:00:00 2001
-From: Rod Whitby <rod@whitby.id.au>
-Date: Tue, 29 Jan 2008 09:53:46 +1030
-Subject: ixp4xx: Button and LED updates for the nas100d board (Patch #4768)
-
- * Convert GPIO and IRQ handling to use the <asm/gpio.h> api.
- * Perform the reset only after the power button has been held down
- for at least two seconds. Do the reset on the release of the power
- button, so that NAS devices which have been set to auto-power-on (by
- solder bridging the power button) do not continuously power cycle.
- * Remove all superflous constants from nas100d.h
- * Add LED constants to nas100d.h while we're there.
- * Update the board LED setup code to use those constants.
-
-Signed-off-by: Rod Whitby <rod@whitby.id.au>
-Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
-
-PATCH FOLLOWS
-KernelVersion: 2.6.24-git5
-
-Index: linux-2.6.24.7/arch/arm/mach-ixp4xx/nas100d-power.c
-===================================================================
---- linux-2.6.24.7.orig/arch/arm/mach-ixp4xx/nas100d-power.c
-+++ linux-2.6.24.7/arch/arm/mach-ixp4xx/nas100d-power.c
-@@ -21,15 +21,59 @@
- #include <linux/irq.h>
- #include <linux/module.h>
- #include <linux/reboot.h>
-+#include <linux/jiffies.h>
-+#include <linux/timer.h>
-
-+#include <asm/gpio.h>
- #include <asm/mach-types.h>
-
--static irqreturn_t nas100d_reset_handler(int irq, void *dev_id)
-+/* This is used to make sure the power-button pusher is serious. The button
-+ * must be held until the value of this counter reaches zero.
-+ */
-+static int power_button_countdown;
-+
-+/* Must hold the button down for at least this many counts to be processed */
-+#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */
-+
-+static void nas100d_power_handler(unsigned long data);
-+static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0);
-+
-+static void nas100d_power_handler(unsigned long data)
- {
-- /* Signal init to do the ctrlaltdel action, this will bypass init if
-- * it hasn't started and do a kernel_restart.
-+ /* This routine is called twice per second to check the
-+ * state of the power button.
- */
-- ctrl_alt_del();
-+
-+ if (gpio_get_value(NAS100D_PB_GPIO)) {
-+
-+ /* IO Pin is 1 (button pushed) */
-+ if (power_button_countdown > 0)
-+ power_button_countdown--;
-+
-+ } else {
-+
-+ /* Done on button release, to allow for auto-power-on mods. */
-+ if (power_button_countdown == 0) {
-+ /* Signal init to do the ctrlaltdel action,
-+ * this will bypass init if it hasn't started
-+ * and do a kernel_restart.
-+ */
-+ ctrl_alt_del();
-+
-+ /* Change the state of the power LED to "blink" */
-+ gpio_line_set(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
-+ } else {
-+ power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
-+ }
-+ }
-+
-+ mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
-+}
-+
-+static irqreturn_t nas100d_reset_handler(int irq, void *dev_id)
-+{
-+ /* This is the paper-clip reset, it shuts the machine down directly. */
-+ machine_power_off();
-
- return IRQ_HANDLED;
- }
-@@ -39,17 +83,30 @@ static int __init nas100d_power_init(voi
- if (!(machine_is_nas100d()))
- return 0;
-
-- set_irq_type(NAS100D_RB_IRQ, IRQT_LOW);
-+ set_irq_type(gpio_to_irq(NAS100D_RB_GPIO), IRQT_LOW);
-
-- if (request_irq(NAS100D_RB_IRQ, &nas100d_reset_handler,
-+ if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler,
- IRQF_DISABLED, "NAS100D reset button", NULL) < 0) {
-
- printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
-- NAS100D_RB_IRQ);
-+ gpio_to_irq(NAS100D_RB_GPIO));
-
- return -EIO;
- }
-
-+ /* The power button on the Iomega NAS100d is on GPIO 14, but
-+ * it cannot handle interrupts on that GPIO line. So we'll
-+ * have to poll it with a kernel timer.
-+ */
-+
-+ /* Make sure that the power button GPIO is set up as an input */
-+ gpio_line_config(NAS100D_PB_GPIO, IXP4XX_GPIO_IN);
-+
-+ /* Set the initial value for the power button IRQ handler */
-+ power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
-+
-+ mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
-+
- return 0;
- }
-
-@@ -58,7 +115,9 @@ static void __exit nas100d_power_exit(vo
- if (!(machine_is_nas100d()))
- return;
-
-- free_irq(NAS100D_RB_IRQ, NULL);
-+ del_timer_sync(&nas100d_power_timer);
-+
-+ free_irq(gpio_to_irq(NAS100D_RB_GPIO), NULL);
- }
-
- module_init(nas100d_power_init);
-Index: linux-2.6.24.7/arch/arm/mach-ixp4xx/nas100d-setup.c
-===================================================================
---- linux-2.6.24.7.orig/arch/arm/mach-ixp4xx/nas100d-setup.c
-+++ linux-2.6.24.7/arch/arm/mach-ixp4xx/nas100d-setup.c
-@@ -43,20 +43,20 @@ static struct platform_device nas100d_fl
- static struct resource nas100d_led_resources[] = {
- {
- .name = "wlan", /* green led */
-- .start = 0,
-- .end = 0,
-+ .start = NAS100D_LED_WLAN_GPIO,
-+ .end = NAS100D_LED_WLAN_GPIO,
- .flags = IXP4XX_GPIO_LOW,
- },
- {
-- .name = "ready", /* blue power led (off is flashing!) */
-- .start = 15,
-- .end = 15,
-+ .name = "power", /* blue power led (off=flashing) */
-+ .start = NAS100D_LED_PWR_GPIO,
-+ .end = NAS100D_LED_PWR_GPIO,
- .flags = IXP4XX_GPIO_LOW,
- },
- {
- .name = "disk", /* yellow led */
-- .start = 3,
-- .end = 3,
-+ .start = NAS100D_LED_DISK_GPIO,
-+ .end = NAS100D_LED_DISK_GPIO,
- .flags = IXP4XX_GPIO_LOW,
- },
- };
-Index: linux-2.6.24.7/include/asm-arm/arch-ixp4xx/nas100d.h
-===================================================================
---- linux-2.6.24.7.orig/include/asm-arm/arch-ixp4xx/nas100d.h
-+++ linux-2.6.24.7/include/asm-arm/arch-ixp4xx/nas100d.h
-@@ -38,15 +38,15 @@
-
- /* Buttons */
-
--#define NAS100D_PB_GPIO 14
--#define NAS100D_RB_GPIO 4
-+#define NAS100D_PB_GPIO 14 /* power button */
-+#define NAS100D_RB_GPIO 4 /* reset button */
-+
-+/* Power control */
-+
- #define NAS100D_PO_GPIO 12 /* power off */
-
--#define NAS100D_PB_IRQ IRQ_IXP4XX_GPIO14
--#define NAS100D_RB_IRQ IRQ_IXP4XX_GPIO4
-+/* LEDs */
-
--/*
--#define NAS100D_PB_BM (1L << NAS100D_PB_GPIO)
--#define NAS100D_PO_BM (1L << NAS100D_PO_GPIO)
--#define NAS100D_RB_BM (1L << NAS100D_RB_GPIO)
--*/
-+#define NAS100D_LED_WLAN_GPIO 0
-+#define NAS100D_LED_DISK_GPIO 3
-+#define NAS100D_LED_PWR_GPIO 15
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