Input: add support for OnKey module for DA9052/53 PMIC (f0c5f65b) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/input/misc/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -455,6 +455,16 @@ config INPUT_RB532_BUTTON
		To compile this driver as a module, choose M here: the
		module will be called rb532_button.

		config INPUT_DA9052_ONKEY
		tristate "Dialog DA9052/DA9053 Onkey"
		depends on PMIC_DA9052
		help
		Support the ONKEY of Dialog DA9052 PMICs as an input device
		reporting power button status.

		To compile this driver as a module, choose M here: the
		module will be called da9052_onkey.

		config INPUT_DM355EVM
		tristate "TI DaVinci DM355 EVM Keypad and IR Remote"
		depends on MFD_DM355EVM_MSP

drivers/input/misc/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@ obj-$(CONFIG_INPUT_CM109) += cm109.o
		obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o
		obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
		obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
		obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o
		obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
		obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o
		obj-$(CONFIG_INPUT_GPIO_TILT_POLLED) += gpio_tilt_polled.o

drivers/input/misc/da9052_onkey.c

0 → 100644

+169 −0

Original line number	Diff line number	Diff line
		/*
		* ON pin driver for Dialog DA9052 PMICs
		*
		* Copyright(c) 2012 Dialog Semiconductor Ltd.
		*
		* Author: David Dajun Chen <dchen@diasemi.com>
		*
		* 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.
		*/

		#include <linux/init.h>
		#include <linux/input.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/workqueue.h>

		#include <linux/mfd/da9052/da9052.h>
		#include <linux/mfd/da9052/reg.h>

		struct da9052_onkey {
		struct da9052 *da9052;
		struct input_dev *input;
		struct delayed_work work;
		unsigned int irq;
		};

		static void da9052_onkey_query(struct da9052_onkey *onkey)
		{
		int key_stat;

		key_stat = da9052_reg_read(onkey->da9052, DA9052_EVENT_B_REG);
		if (key_stat < 0) {
		dev_err(onkey->da9052->dev,
		"Failed to read onkey event %d\n", key_stat);
		} else {
		/*
		* Since interrupt for deassertion of ONKEY pin is not
		* generated, onkey event state determines the onkey
		* button state.
		*/
		key_stat &= DA9052_EVENTB_ENONKEY;
		input_report_key(onkey->input, KEY_POWER, key_stat);
		input_sync(onkey->input);
		}

		/*
		* Interrupt is generated only when the ONKEY pin is asserted.
		* Hence the deassertion of the pin is simulated through work queue.
		*/
		if (key_stat)
		schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
		}

		static void da9052_onkey_work(struct work_struct *work)
		{
		struct da9052_onkey *onkey = container_of(work, struct da9052_onkey,
		work.work);

		da9052_onkey_query(onkey);
		}

		static irqreturn_t da9052_onkey_irq(int irq, void *data)
		{
		struct da9052_onkey *onkey = data;

		da9052_onkey_query(onkey);

		return IRQ_HANDLED;
		}

		static int __devinit da9052_onkey_probe(struct platform_device *pdev)
		{
		struct da9052 *da9052 = dev_get_drvdata(pdev->dev.parent);
		struct da9052_onkey *onkey;
		struct input_dev *input_dev;
		int irq;
		int error;

		if (!da9052) {
		dev_err(&pdev->dev, "Failed to get the driver's data\n");
		return -EINVAL;
		}

		irq = platform_get_irq_byname(pdev, "ONKEY");
		if (irq < 0) {
		dev_err(&pdev->dev,
		"Failed to get an IRQ for input device, %d\n", irq);
		return -EINVAL;
		}

		onkey = kzalloc(sizeof(*onkey), GFP_KERNEL);
		input_dev = input_allocate_device();
		if (!onkey \|\| !input_dev) {
		dev_err(&pdev->dev, "Failed to allocate memory\n");
		return -ENOMEM;
		}

		onkey->input = input_dev;
		onkey->da9052 = da9052;
		onkey->irq = irq;
		INIT_DELAYED_WORK(&onkey->work, da9052_onkey_work);

		input_dev->name = "da9052-onkey";
		input_dev->phys = "da9052-onkey/input0";
		input_dev->dev.parent = &pdev->dev;

		input_dev->evbit[0] = BIT_MASK(EV_KEY);
		__set_bit(KEY_POWER, input_dev->keybit);

		error = request_threaded_irq(onkey->irq, NULL, da9052_onkey_irq,
		IRQF_TRIGGER_LOW \| IRQF_ONESHOT,
		"ONKEY", onkey);
		if (error < 0) {
		dev_err(onkey->da9052->dev,
		"Failed to register ONKEY IRQ %d, error = %d\n",
		onkey->irq, error);
		goto err_free_mem;
		}

		error = input_register_device(onkey->input);
		if (error) {
		dev_err(&pdev->dev, "Unable to register input device, %d\n",
		error);
		goto err_free_irq;
		}

		platform_set_drvdata(pdev, onkey);
		return 0;

		err_free_irq:
		free_irq(onkey->irq, onkey);
		cancel_delayed_work_sync(&onkey->work);
		err_free_mem:
		input_free_device(input_dev);
		kfree(onkey);

		return error;
		}

		static int __devexit da9052_onkey_remove(struct platform_device *pdev)
		{
		struct da9052_onkey *onkey = platform_get_drvdata(pdev);

		free_irq(onkey->irq, onkey);
		cancel_delayed_work_sync(&onkey->work);

		input_unregister_device(onkey->input);
		kfree(onkey);

		return 0;
		}

		static struct platform_driver da9052_onkey_driver = {
		.probe = da9052_onkey_probe,
		.remove = __devexit_p(da9052_onkey_remove),
		.driver = {
		.name = "da9052-onkey",
		.owner = THIS_MODULE,
		},
		};
		module_platform_driver(da9052_onkey_driver);

		MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
		MODULE_DESCRIPTION("Onkey driver for DA9052");
		MODULE_LICENSE("GPL");
		MODULE_ALIAS("platform:da9052-onkey");