// 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, IRQF_ONESHOT, 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");