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1// SPDX-License-Identifier: GPL-2.02/*3 * Power-button driver for Basin Cove PMIC4 *5 * Copyright (c) 2019, Intel Corporation.6 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>7 */8 9#include <linux/input.h>10#include <linux/interrupt.h>11#include <linux/device.h>12#include <linux/mfd/intel_soc_pmic.h>13#include <linux/mfd/intel_soc_pmic_mrfld.h>14#include <linux/module.h>15#include <linux/platform_device.h>16#include <linux/pm_wakeirq.h>17#include <linux/slab.h>18 19#define BCOVE_PBSTATUS 0x2720#define BCOVE_PBSTATUS_PBLVL BIT(4) /* 1 - release, 0 - press */21 22static irqreturn_t mrfld_pwrbtn_interrupt(int irq, void *dev_id)23{24 struct input_dev *input = dev_id;25 struct device *dev = input->dev.parent;26 struct regmap *regmap = dev_get_drvdata(dev);27 unsigned int state;28 int ret;29 30 ret = regmap_read(regmap, BCOVE_PBSTATUS, &state);31 if (ret)32 return IRQ_NONE;33 34 dev_dbg(dev, "PBSTATUS=0x%x\n", state);35 input_report_key(input, KEY_POWER, !(state & BCOVE_PBSTATUS_PBLVL));36 input_sync(input);37 38 regmap_update_bits(regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_PWRBTN, 0);39 return IRQ_HANDLED;40}41 42static int mrfld_pwrbtn_probe(struct platform_device *pdev)43{44 struct device *dev = &pdev->dev;45 struct intel_soc_pmic *pmic = dev_get_drvdata(dev->parent);46 struct input_dev *input;47 int irq, ret;48 49 irq = platform_get_irq(pdev, 0);50 if (irq < 0)51 return irq;52 53 input = devm_input_allocate_device(dev);54 if (!input)55 return -ENOMEM;56 input->name = pdev->name;57 input->phys = "power-button/input0";58 input->id.bustype = BUS_HOST;59 input->dev.parent = dev;60 input_set_capability(input, EV_KEY, KEY_POWER);61 ret = input_register_device(input);62 if (ret)63 return ret;64 65 dev_set_drvdata(dev, pmic->regmap);66 67 ret = devm_request_threaded_irq(dev, irq, NULL, mrfld_pwrbtn_interrupt,68 IRQF_ONESHOT | IRQF_SHARED, pdev->name,69 input);70 if (ret)71 return ret;72 73 regmap_update_bits(pmic->regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_PWRBTN, 0);74 regmap_update_bits(pmic->regmap, BCOVE_MPBIRQ, BCOVE_PBIRQ_PBTN, 0);75 76 device_init_wakeup(dev, true);77 dev_pm_set_wake_irq(dev, irq);78 return 0;79}80 81static void mrfld_pwrbtn_remove(struct platform_device *pdev)82{83 struct device *dev = &pdev->dev;84 85 dev_pm_clear_wake_irq(dev);86 device_init_wakeup(dev, false);87}88 89static const struct platform_device_id mrfld_pwrbtn_id_table[] = {90 { .name = "mrfld_bcove_pwrbtn" },91 {}92};93MODULE_DEVICE_TABLE(platform, mrfld_pwrbtn_id_table);94 95static struct platform_driver mrfld_pwrbtn_driver = {96 .driver = {97 .name = "mrfld_bcove_pwrbtn",98 },99 .probe = mrfld_pwrbtn_probe,100 .remove_new = mrfld_pwrbtn_remove,101 .id_table = mrfld_pwrbtn_id_table,102};103module_platform_driver(mrfld_pwrbtn_driver);104 105MODULE_DESCRIPTION("Power-button driver for Basin Cove PMIC");106MODULE_LICENSE("GPL v2");107