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Commit fcd6eb50 authored by Jorge Ramirez-Ortiz's avatar Jorge Ramirez-Ortiz Committed by Dmitry Torokhov
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Input: add powerkey driver for HISI 65xx SoC 



This driver provides a input driver for the power button on the
HiSi 65xx SoC for boards like HiKey.

This driver was originally by Zhiliang Xue <xuezhiliang@huawei.com>
then basically rewritten by Jorge, but preserving the original
module author credits.

Signed-off-by: default avatarJorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
[jstultz: Reworked commit message, folded in other fixes/cleanups
from Jorge, implemented some larger cleanups suggested by DmitryT]
Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent f695c240

drivers/input/misc/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -810,4 +810,13 @@ config INPUT_DRV2667_HAPTICS 
	  To compile this driver as a module, choose M here: the

	  module will be called drv2667-haptics.



config INPUT_HISI_POWERKEY

	tristate "Hisilicon PMIC ONKEY support"

	depends on ARCH_HISI || COMPILE_TEST

	help

	  Say Y to enable support for PMIC ONKEY.



	  To compile this driver as a module, choose M here: the

	  module will be called hisi_powerkey.



endif

drivers/input/misc/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ obj-$(CONFIG_INPUT_DRV2667_HAPTICS) += drv2667.o 
obj-$(CONFIG_INPUT_GP2A)		+= gp2ap002a00f.o

obj-$(CONFIG_INPUT_GPIO_BEEPER)		+= gpio-beeper.o

obj-$(CONFIG_INPUT_GPIO_TILT_POLLED)	+= gpio_tilt_polled.o

obj-$(CONFIG_INPUT_HISI_POWERKEY)	+= hisi_powerkey.o

obj-$(CONFIG_HP_SDC_RTC)		+= hp_sdc_rtc.o

obj-$(CONFIG_INPUT_IMS_PCU)		+= ims-pcu.o

obj-$(CONFIG_INPUT_IXP4XX_BEEPER)	+= ixp4xx-beeper.o

drivers/input/misc/hisi_powerkey.c

0 → 100644
+142 −0
Original line number Diff line number Diff line 
/*

 * Hisilicon PMIC powerkey driver

 *

 * Copyright (C) 2013 Hisilicon Ltd.

 * Copyright (C) 2015, 2016 Linaro Ltd.

 *

 * 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.

 */



#include <linux/platform_device.h>

#include <linux/interrupt.h>

#include <linux/reboot.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of_irq.h>

#include <linux/input.h>

#include <linux/slab.h>



/* the held interrupt will trigger after 4 seconds */

#define MAX_HELD_TIME	(4 * MSEC_PER_SEC)



static irqreturn_t hi65xx_power_press_isr(int irq, void *q)

{

	struct input_dev *input = q;



	pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);

	input_report_key(input, KEY_POWER, 1);

	input_sync(input);



	return IRQ_HANDLED;

}



static irqreturn_t hi65xx_power_release_isr(int irq, void *q)

{

	struct input_dev *input = q;



	pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);

	input_report_key(input, KEY_POWER, 0);

	input_sync(input);



	return IRQ_HANDLED;

}



static irqreturn_t hi65xx_restart_toggle_isr(int irq, void *q)

{

	struct input_dev *input = q;

	int value = test_bit(KEY_RESTART, input->key);



	pm_wakeup_event(input->dev.parent, MAX_HELD_TIME);

	input_report_key(input, KEY_RESTART, !value);

	input_sync(input);



	return IRQ_HANDLED;

}



static const struct {

	const char *name;

	irqreturn_t (*handler)(int irq, void *q);

} hi65xx_irq_info[] = {

	{ "down", hi65xx_power_press_isr },

	{ "up", hi65xx_power_release_isr },

	{ "hold 4s", hi65xx_restart_toggle_isr },

};



static int hi65xx_powerkey_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct input_dev *input;

	int irq, i, error;



	input = devm_input_allocate_device(&pdev->dev);

	if (!input) {

		dev_err(&pdev->dev, "failed to allocate input device\n");

		return -ENOMEM;

	}



	input->phys = "hisi_on/input0";

	input->name = "HISI 65xx PowerOn Key";



	input_set_capability(input, EV_KEY, KEY_POWER);

	input_set_capability(input, EV_KEY, KEY_RESTART);



	for (i = 0; i < ARRAY_SIZE(hi65xx_irq_info); i++) {



		irq = platform_get_irq_byname(pdev, hi65xx_irq_info[i].name);

		if (irq < 0) {

			error = irq;

			dev_err(dev, "couldn't get irq %s: %d\n",

				hi65xx_irq_info[i].name, error);

			return error;

		}



		error = devm_request_any_context_irq(dev, irq,

						     hi65xx_irq_info[i].handler,

						     IRQF_ONESHOT,

						     hi65xx_irq_info[i].name,

						     input);

		if (error < 0) {

			dev_err(dev, "couldn't request irq %s: %d\n",

				hi65xx_irq_info[i].name, error);

			return error;

		}

	}



	error = input_register_device(input);

	if (error) {

		dev_err(&pdev->dev, "failed to register input device: %d\n",

			error);

		return error;

	}



	device_init_wakeup(&pdev->dev, 1);



	return 0;

}



static int hi65xx_powerkey_remove(struct platform_device *pdev)

{

	device_init_wakeup(&pdev->dev, 0);



	return 0;

}



static struct platform_driver hi65xx_powerkey_driver = {

	.driver = {

		.name = "hi65xx-powerkey",

	},

	.probe = hi65xx_powerkey_probe,

	.remove  = hi65xx_powerkey_remove,

};

module_platform_driver(hi65xx_powerkey_driver);



MODULE_AUTHOR("Zhiliang Xue <xuezhiliang@huawei.com");

MODULE_DESCRIPTION("Hisi PMIC Power key driver");

MODULE_LICENSE("GPL v2");