input: cpcap-pwrbutton: New driver (6d999718) · Commits · 戴 / test

Documentation/devicetree/bindings/input/cpcap-pwrbutton.txt

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			Motorola CPCAP on key

			This module is part of the CPCAP. For more details about the whole
			chip see Documentation/devicetree/bindings/mfd/motorola-cpcap.txt.

			This module provides a simple power button event via an Interrupt.

			Required properties:
			- compatible: should be one of the following
			- "motorola,cpcap-pwrbutton"
			- interrupts: irq specifier for CPCAP's ON IRQ

			Example:

			&cpcap {
			cpcap_pwrbutton: pwrbutton {
			compatible = "motorola,cpcap-pwrbutton";
			interrupts = <23 IRQ_TYPE_NONE>;
			};
			};

drivers/input/misc/Kconfig

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	@@ -316,6 +316,16 @@ config INPUT_COBALT_BTNS
	To compile this driver as a module, choose M here: the		To compile this driver as a module, choose M here: the
	module will be called cobalt_btns.		module will be called cobalt_btns.

			config INPUT_CPCAP_PWRBUTTON
			tristate "CPCAP OnKey"
			depends on MFD_CPCAP
			help
			Say Y here if you want to enable power key reporting via the
			Motorola CPCAP chip.

			To compile this driver as a module, choose M here. The module will
			be called cpcap-pwrbutton.

	config INPUT_WISTRON_BTNS		config INPUT_WISTRON_BTNS
	tristate "x86 Wistron laptop button interface"		tristate "x86 Wistron laptop button interface"
	depends on X86_32		depends on X86_32

drivers/input/misc/Makefile

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	@@ -24,6 +24,7 @@ obj-$(CONFIG_INPUT_CM109) += cm109.o
	obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o		obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o
	obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o		obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
	obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o		obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
			obj-$(CONFIG_INPUT_CPCAP_PWRBUTTON) += cpcap-pwrbutton.o
	obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o		obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o
	obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o		obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o
	obj-$(CONFIG_INPUT_DA9063_ONKEY) += da9063_onkey.o		obj-$(CONFIG_INPUT_DA9063_ONKEY) += da9063_onkey.o

drivers/input/misc/cpcap-pwrbutton.c

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			/**
			* CPCAP Power Button Input Driver
			*
			* Copyright (C) 2017 Sebastian Reichel <sre@kernel.org>
			*
			* 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/module.h>
			#include <linux/init.h>
			#include <linux/kernel.h>
			#include <linux/errno.h>
			#include <linux/input.h>
			#include <linux/interrupt.h>
			#include <linux/regmap.h>
			#include <linux/of.h>
			#include <linux/platform_device.h>
			#include <linux/mfd/motorola-cpcap.h>

			#define CPCAP_IRQ_ON 23
			#define CPCAP_IRQ_ON_BITMASK (1 << (CPCAP_IRQ_ON % 16))

			struct cpcap_power_button {
			struct regmap *regmap;
			struct input_dev *idev;
			struct device *dev;
			};

			static irqreturn_t powerbutton_irq(int irq, void *_button)
			{
			struct cpcap_power_button *button = _button;
			int val;

			val = cpcap_sense_virq(button->regmap, irq);
			if (val < 0) {
			dev_err(button->dev, "irq read failed: %d", val);
			return IRQ_HANDLED;
			}

			pm_wakeup_event(button->dev, 0);
			input_report_key(button->idev, KEY_POWER, val);
			input_sync(button->idev);

			return IRQ_HANDLED;
			}

			static int cpcap_power_button_probe(struct platform_device *pdev)
			{
			struct cpcap_power_button *button;
			int irq = platform_get_irq(pdev, 0);
			int err;

			button = devm_kmalloc(&pdev->dev, sizeof(*button), GFP_KERNEL);
			if (!button)
			return -ENOMEM;

			button->idev = devm_input_allocate_device(&pdev->dev);
			if (!button->idev)
			return -ENOMEM;

			button->regmap = dev_get_regmap(pdev->dev.parent, NULL);
			if (!button->regmap)
			return -ENODEV;

			button->dev = &pdev->dev;

			button->idev->name = "cpcap-pwrbutton";
			button->idev->phys = "cpcap-pwrbutton/input0";
			button->idev->dev.parent = button->dev;
			input_set_capability(button->idev, EV_KEY, KEY_POWER);

			err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
			powerbutton_irq, IRQF_ONESHOT, "cpcap_pwrbutton", button);
			if (err < 0) {
			dev_err(&pdev->dev, "IRQ request failed: %d\n", err);
			return err;
			}

			err = input_register_device(button->idev);
			if (err) {
			dev_err(&pdev->dev, "Input register failed: %d\n", err);
			return err;
			}

			device_init_wakeup(&pdev->dev, true);

			return 0;
			}

			#ifdef CONFIG_OF
			static const struct of_device_id cpcap_pwrbutton_dt_match_table[] = {
			{ .compatible = "motorola,cpcap-pwrbutton" },
			{},
			};
			MODULE_DEVICE_TABLE(of, cpcap_pwrbutton_dt_match_table);
			#endif

			static struct platform_driver cpcap_power_button_driver = {
			.probe = cpcap_power_button_probe,
			.driver = {
			.name = "cpcap-pwrbutton",
			.of_match_table = of_match_ptr(cpcap_pwrbutton_dt_match_table),
			},
			};
			module_platform_driver(cpcap_power_button_driver);

			MODULE_ALIAS("platform:cpcap-pwrbutton");
			MODULE_DESCRIPTION("CPCAP Power Button");
			MODULE_LICENSE("GPL");
			MODULE_AUTHOR("Sebastian Reichel <sre@kernel.org>");

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