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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Power-button driver for Dollar Cove TI PMIC
- * Copyright (C) 2014 Intel Corp
- * Copyright (c) 2017 Takashi Iwai <tiwai@suse.de>
- */
- #include <linux/input.h>
- #include <linux/interrupt.h>
- #include <linux/device.h>
- #include <linux/mfd/intel_soc_pmic.h>
- #include <linux/module.h>
- #include <linux/platform_device.h>
- #include <linux/pm_wakeirq.h>
- #include <linux/slab.h>
- #define CHTDC_TI_SIRQ_REG 0x3
- #define SIRQ_PWRBTN_REL BIT(0)
- static irqreturn_t chtdc_ti_pwrbtn_interrupt(int irq, void *dev_id)
- {
- struct input_dev *input = dev_id;
- struct device *dev = input->dev.parent;
- struct regmap *regmap = dev_get_drvdata(dev);
- int state;
- if (!regmap_read(regmap, CHTDC_TI_SIRQ_REG, &state)) {
- dev_dbg(dev, "SIRQ_REG=0x%x\n", state);
- input_report_key(input, KEY_POWER, !(state & SIRQ_PWRBTN_REL));
- input_sync(input);
- }
- return IRQ_HANDLED;
- }
- static int chtdc_ti_pwrbtn_probe(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- struct intel_soc_pmic *pmic = dev_get_drvdata(dev->parent);
- struct input_dev *input;
- int irq, err;
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
- input = devm_input_allocate_device(dev);
- if (!input)
- return -ENOMEM;
- input->name = pdev->name;
- input->phys = "power-button/input0";
- input->id.bustype = BUS_HOST;
- input_set_capability(input, EV_KEY, KEY_POWER);
- err = input_register_device(input);
- if (err)
- return err;
- dev_set_drvdata(dev, pmic->regmap);
- err = devm_request_threaded_irq(dev, irq, NULL,
- chtdc_ti_pwrbtn_interrupt,
- 0, KBUILD_MODNAME, input);
- if (err)
- return err;
- device_init_wakeup(dev, true);
- dev_pm_set_wake_irq(dev, irq);
- return 0;
- }
- static int chtdc_ti_pwrbtn_remove(struct platform_device *pdev)
- {
- dev_pm_clear_wake_irq(&pdev->dev);
- device_init_wakeup(&pdev->dev, false);
- return 0;
- }
- static const struct platform_device_id chtdc_ti_pwrbtn_id_table[] = {
- { .name = "chtdc_ti_pwrbtn" },
- {},
- };
- MODULE_DEVICE_TABLE(platform, chtdc_ti_pwrbtn_id_table);
- static struct platform_driver chtdc_ti_pwrbtn_driver = {
- .driver = {
- .name = KBUILD_MODNAME,
- },
- .probe = chtdc_ti_pwrbtn_probe,
- .remove = chtdc_ti_pwrbtn_remove,
- .id_table = chtdc_ti_pwrbtn_id_table,
- };
- module_platform_driver(chtdc_ti_pwrbtn_driver);
- MODULE_DESCRIPTION("Power-button driver for Dollar Cove TI PMIC");
- MODULE_LICENSE("GPL v2");
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