[PATCH 97/133] [Jaunty SRU] ARM.imx51 Freescale:ENGR00112841 MX51 BBG2: Add Power Key support

[Brad Figg]

From: Lily Zhang <r58066 at freescale.com>

Set power key as wakeup resource

Signed-off-by: Lily Zhang <r58066 at freescale.com>
Signed-off-by: Brad Figg <brad.figg at canonical.com>
---
 arch/arm/mach-mx51/mx51_babbage.c      |   28 ++++++++++++++++++++++++++++
 arch/arm/mach-mx51/mx51_babbage_gpio.c |   14 ++++++++------
 2 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mach-mx51/mx51_babbage.c b/arch/arm/mach-mx51/mx51_babbage.c
index 803800b..720d6bf 100644
--- a/arch/arm/mach-mx51/mx51_babbage.c
+++ b/arch/arm/mach-mx51/mx51_babbage.c
@@ -585,6 +585,34 @@ static void mxc_power_off(void)
 }
 
 /*!
+ * Power Key interrupt handler.
+ */
+static irqreturn_t power_key_int(int irq, void *dev_id)
+{
+	pr_info(KERN_INFO "PWR key pressed\n");
+	return 0;
+}
+
+/*!
+ * Power Key initialization.
+ */
+static int __init mxc_init_power_key(void)
+{
+	/* Set power key as wakeup resource */
+	int irq, ret;
+	irq = IOMUX_TO_IRQ(MX51_PIN_EIM_A27);
+	set_irq_type(irq, IRQF_TRIGGER_RISING);
+	ret = request_irq(irq, power_key_int, 0, "power_key", 0);
+	if (ret)
+		pr_info("register on-off key interrupt failed\n");
+	else
+		enable_irq_wake(irq);
+	return ret;
+}
+
+late_initcall(mxc_init_power_key);
+
+/*!
  * Board specific initialization.
  */
 static void __init mxc_board_init(void)
diff --git a/arch/arm/mach-mx51/mx51_babbage_gpio.c b/arch/arm/mach-mx51/mx51_babbage_gpio.c
index e3f4304..d971ba5 100644
--- a/arch/arm/mach-mx51/mx51_babbage_gpio.c
+++ b/arch/arm/mach-mx51/mx51_babbage_gpio.c
@@ -121,12 +121,6 @@ static struct mxc_iomux_pin_cfg __initdata mxc_iomux_pins[] = {
 	 (PAD_CTL_SRE_FAST | PAD_CTL_DRV_HIGH | PAD_CTL_100K_PU |
 	  PAD_CTL_PUE_KEEPER | PAD_CTL_PKE_ENABLE | PAD_CTL_HYS_ENABLE),
 	 },
-	/* USBH2_NXT */
-	{
-	 MX51_PIN_EIM_A27, IOMUX_CONFIG_ALT2,
-	 (PAD_CTL_SRE_FAST | PAD_CTL_DRV_HIGH | PAD_CTL_100K_PU |
-	  PAD_CTL_PUE_KEEPER | PAD_CTL_PKE_ENABLE | PAD_CTL_HYS_ENABLE),
-	 },
 	{			/*MDIO */
 	 MX51_PIN_EIM_EB2, IOMUX_CONFIG_ALT3,
 	 (PAD_CTL_SRE_FAST | PAD_CTL_DRV_HIGH | PAD_CTL_ODE_OPENDRAIN_ENABLE |
@@ -570,6 +564,14 @@ void __init mx51_babbage_io_init(void)
 				  PAD_CTL_PKE_ENABLE | PAD_CTL_SRE_FAST);
 		mxc_set_gpio_direction(MX51_PIN_CSPI1_RDY, 0);
 		mxc_set_gpio_dataout(MX51_PIN_CSPI1_RDY, 0);
+
+		/* power key */
+		mxc_request_iomux(MX51_PIN_EIM_A27, IOMUX_CONFIG_ALT1);
+		mxc_iomux_set_pad(MX51_PIN_EIM_A27, PAD_CTL_SRE_FAST |
+				  PAD_CTL_ODE_OPENDRAIN_NONE |
+				  PAD_CTL_DRV_HIGH | PAD_CTL_100K_PU |
+				  PAD_CTL_HYS_NONE);
+		mxc_set_gpio_direction(MX51_PIN_EIM_A27, 1);
 	}
 
 	/* Deassert VGA reset to free i2c bus */
-- 
1.6.0.4