ENGR00132553-2 Power: enable power on/off key as suspend/resume key

Driver Part
enable the powerkey as suspend/resume key on mx53evk and mx50 rdp

Signed-off-by: Hu Hui <b29976@freescale.com>

2 files changed, 129 insertions, 0 deletions

diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index ce93d014483d..5640a0aa9f39 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_KEYBOARD_TWL4030)		+= twl4030_keypad.o
 obj-$(CONFIG_KEYBOARD_XTKBD)		+= xtkbd.o
 obj-$(CONFIG_KEYBOARD_W90P910)		+= w90p910_keypad.o
 obj-$(CONFIG_KEYBOARD_MXC)		+= mxc_keyb.o
+obj-$(CONFIG_KEYBOARD_MXC)		+= mxc_pwrkey.o
 obj-$(CONFIG_KEYBOARD_MPR084)		+= mpr084.o
 obj-$(CONFIG_KEYBOARD_MXS)		+= mxs-kbd.o
 obj-$(CONFIG_KEYBOARD_MC9S08DZ60)	+= mc9s08dz60_keyb.o
diff --git a/drivers/input/keyboard/mxc_pwrkey.c b/drivers/input/keyboard/mxc_pwrkey.c
new file mode 100755
index 000000000000..c4e9ce9865c1
--- /dev/null
+++ b/drivers/input/keyboard/mxc_pwrkey.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <linux/kd.h>
+#include <linux/fs.h>
+#include <linux/ioctl.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/pmic_external.h>
+
+#define KEYCODE_ONOFF            KEY_F4
+
+/*! Input device structure. */
+static struct input_dev *mxcpwrkey_dev;
+static bool key_press;
+static void power_key_event_handler(void)
+{
+	if (!key_press) {
+		key_press = true;
+		input_report_key(mxcpwrkey_dev, KEYCODE_ONOFF, 1);
+		pr_info("%s_KeyUP\n", __func__);
+	} else {
+		if (key_press) {
+			key_press = false;
+			input_report_key(mxcpwrkey_dev, KEYCODE_ONOFF, 0);
+			pr_info("%s_KeyDown\n", __func__);
+		}
+	}
+}
+static int mxcpwrkey_probe(struct platform_device *pdev)
+{
+	int retval, err;
+	pmic_event_callback_t power_key_event;
+
+	printk(KERN_INFO "PMIC powerkey probe\n");
+
+	key_press = false;
+	mxcpwrkey_dev = input_allocate_device();
+	if (!mxcpwrkey_dev) {
+		printk(KERN_ERR "mxcpwrkey_dev: not enough memory for input device\n");
+		retval = -ENOMEM;
+		goto err1;
+	}
+
+	mxcpwrkey_dev->name = "mxc_power_key";
+	mxcpwrkey_dev->phys = "mxcpwrkey/input0";
+	mxcpwrkey_dev->id.bustype = BUS_HOST;
+	mxcpwrkey_dev->evbit[0] = BIT_MASK(EV_KEY);
+
+	power_key_event.param = NULL;
+	power_key_event.func = (void *)power_key_event_handler;
+	pmic_event_subscribe(EVENT_PWRONI, power_key_event);
+
+	input_set_capability(mxcpwrkey_dev, EV_KEY, KEYCODE_ONOFF);
+
+	retval = input_register_device(mxcpwrkey_dev);
+	if (retval < 0) {
+		printk(KERN_ERR "mxcpwrkey_dev: failed to register input device\n");
+		goto err2;
+	}
+	return 0;
+err2:
+	input_free_device(mxcpwrkey_dev);
+err1:
+	return retval;
+}
+static int mxcpwrkey_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+static int mxc_pwrkey_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	return 0;
+}
+static int mxc_pwrkey_resume(struct platform_device *pdev)
+{
+	return 0;
+}
+static struct platform_driver mxcpwrkey_driver = {
+	.driver = {
+		.name = "mxcpwrkey",
+	},
+	.probe = mxcpwrkey_probe,
+	.remove = mxcpwrkey_remove,
+	.suspend = mxc_pwrkey_suspend,
+	.resume = mxc_pwrkey_resume,
+};
+static int __init mxcpwrkey_init(void)
+{
+	platform_driver_register(&mxcpwrkey_driver);
+	return 0;
+}
+
+static void __exit mxcpwrkey_exit(void)
+{
+	platform_driver_unregister(&mxcpwrkey_driver);
+}
+module_init(mxcpwrkey_init);
+module_exit(mxcpwrkey_exit);
+
+
+MODULE_AUTHOR("Freescale Semiconductor");
+MODULE_DESCRIPTION("MXC board power key Driver");
+MODULE_LICENSE("GPL");