Input: enable onkey driver of max8925 (3734574c) · Commits · e / devices / android_kernel_teracube_emerald

drivers/input/misc/Kconfig

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Original line number	Diff line number	Diff line
		@@ -80,6 +80,16 @@ config INPUT_M68K_BEEP
		tristate "M68k Beeper support"
		depends on M68K

		config INPUT_MAX8925_ONKEY
		tristate "MAX8925 ONKEY support"
		depends on MFD_MAX8925
		help
		Support the ONKEY of MAX8925 PMICs as an input device
		reporting power button status.

		To compile this driver as a module, choose M here: the module
		will be called max8925_onkey.

		config INPUT_APANEL
		tristate "Fujitsu Lifebook Application Panel buttons"
		depends on X86 && I2C && LEDS_CLASS

drivers/input/misc/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -20,6 +20,7 @@ obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
		obj-$(CONFIG_INPUT_IXP4XX_BEEPER) += ixp4xx-beeper.o
		obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o
		obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o
		obj-$(CONFIG_INPUT_MAX8925_ONKEY) += max8925_onkey.o
		obj-$(CONFIG_INPUT_PCAP) += pcap_keys.o
		obj-$(CONFIG_INPUT_PCF50633_PMU) += pcf50633-input.o
		obj-$(CONFIG_INPUT_PCF8574) += pcf8574_keypad.o

drivers/input/misc/max8925_onkey.c

0 → 100644

+148 −0

Original line number	Diff line number	Diff line
		/**
		* max8925_onkey.c - MAX8925 ONKEY driver
		*
		* Copyright (C) 2009 Marvell International Ltd.
		* Haojian Zhuang <haojian.zhuang@marvell.com>
		*
		* This file is subject to the terms and conditions of the GNU General
		* Public License. See the file "COPYING" in the main directory of this
		* archive for more details.
		*
		* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/i2c.h>
		#include <linux/input.h>
		#include <linux/interrupt.h>
		#include <linux/mfd/max8925.h>
		#include <linux/slab.h>

		#define HARDRESET_EN (1 << 7)
		#define PWREN_EN (1 << 7)

		struct max8925_onkey_info {
		struct input_dev *idev;
		struct i2c_client *i2c;
		int irq;
		};

		/*
		* MAX8925 gives us an interrupt when ONKEY is held for 3 seconds.
		* max8925_set_bits() operates I2C bus and may sleep. So implement
		* it in thread IRQ handler.
		*/
		static irqreturn_t max8925_onkey_handler(int irq, void *data)
		{
		struct max8925_onkey_info *info = data;

		input_report_key(info->idev, KEY_POWER, 1);
		input_sync(info->idev);

		/* Enable hardreset to halt if system isn't shutdown on time */
		max8925_set_bits(info->i2c, MAX8925_SYSENSEL,
		HARDRESET_EN, HARDRESET_EN);

		return IRQ_HANDLED;
		}

		static int __devinit max8925_onkey_probe(struct platform_device *pdev)
		{
		struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
		struct max8925_onkey_info *info;
		int error;

		info = kzalloc(sizeof(struct max8925_onkey_info), GFP_KERNEL);
		if (!info)
		return -ENOMEM;

		info->i2c = chip->i2c;
		info->irq = chip->irq_base + MAX8925_IRQ_GPM_SW_3SEC;

		info->idev = input_allocate_device();
		if (!info->idev) {
		dev_err(chip->dev, "Failed to allocate input dev\n");
		error = -ENOMEM;
		goto out_input;
		}

		info->idev->name = "max8925_on";
		info->idev->phys = "max8925_on/input0";
		info->idev->id.bustype = BUS_I2C;
		info->idev->dev.parent = &pdev->dev;
		info->idev->evbit[0] = BIT_MASK(EV_KEY);
		info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);

		error = request_threaded_irq(info->irq, NULL, max8925_onkey_handler,
		IRQF_ONESHOT, "onkey", info);
		if (error < 0) {
		dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
		info->irq, error);
		goto out_irq;
		}

		error = input_register_device(info->idev);
		if (error) {
		dev_err(chip->dev, "Can't register input device: %d\n", error);
		goto out;
		}

		platform_set_drvdata(pdev, info);

		return 0;

		out:
		free_irq(info->irq, info);
		out_irq:
		input_free_device(info->idev);
		out_input:
		kfree(info);
		return error;
		}

		static int __devexit max8925_onkey_remove(struct platform_device *pdev)
		{
		struct max8925_onkey_info *info = platform_get_drvdata(pdev);

		free_irq(info->irq, info);
		input_unregister_device(info->idev);
		kfree(info);

		platform_set_drvdata(pdev, NULL);

		return 0;
		}

		static struct platform_driver max8925_onkey_driver = {
		.driver = {
		.name = "max8925-onkey",
		.owner = THIS_MODULE,
		},
		.probe = max8925_onkey_probe,
		.remove = __devexit_p(max8925_onkey_remove),
		};

		static int __init max8925_onkey_init(void)
		{
		return platform_driver_register(&max8925_onkey_driver);
		}
		module_init(max8925_onkey_init);

		static void __exit max8925_onkey_exit(void)
		{
		platform_driver_unregister(&max8925_onkey_driver);
		}
		module_exit(max8925_onkey_exit);

		MODULE_DESCRIPTION("Maxim MAX8925 ONKEY driver");
		MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
		MODULE_LICENSE("GPL");