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107 lines
2.7 KiB
107 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Power-button driver for Basin Cove PMIC |
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* |
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* Copyright (c) 2019, Intel Corporation. |
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* Author: Andy Shevchenko <[email protected]> |
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*/ |
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#include <linux/input.h> |
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#include <linux/interrupt.h> |
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#include <linux/device.h> |
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#include <linux/mfd/intel_soc_pmic.h> |
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#include <linux/mfd/intel_soc_pmic_mrfld.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/pm_wakeirq.h> |
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#include <linux/slab.h> |
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#define BCOVE_PBSTATUS 0x27 |
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#define BCOVE_PBSTATUS_PBLVL BIT(4) /* 1 - release, 0 - press */ |
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static irqreturn_t mrfld_pwrbtn_interrupt(int irq, void *dev_id) |
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{ |
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struct input_dev *input = dev_id; |
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struct device *dev = input->dev.parent; |
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struct regmap *regmap = dev_get_drvdata(dev); |
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unsigned int state; |
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int ret; |
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ret = regmap_read(regmap, BCOVE_PBSTATUS, &state); |
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if (ret) |
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return IRQ_NONE; |
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dev_dbg(dev, "PBSTATUS=0x%x\n", state); |
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input_report_key(input, KEY_POWER, !(state & BCOVE_PBSTATUS_PBLVL)); |
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input_sync(input); |
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regmap_update_bits(regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_PWRBTN, 0); |
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return IRQ_HANDLED; |
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} |
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static int mrfld_pwrbtn_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct intel_soc_pmic *pmic = dev_get_drvdata(dev->parent); |
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struct input_dev *input; |
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int irq, ret; |
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irq = platform_get_irq(pdev, 0); |
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if (irq < 0) |
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return irq; |
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input = devm_input_allocate_device(dev); |
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if (!input) |
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return -ENOMEM; |
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input->name = pdev->name; |
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input->phys = "power-button/input0"; |
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input->id.bustype = BUS_HOST; |
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input->dev.parent = dev; |
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input_set_capability(input, EV_KEY, KEY_POWER); |
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ret = input_register_device(input); |
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if (ret) |
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return ret; |
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dev_set_drvdata(dev, pmic->regmap); |
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ret = devm_request_threaded_irq(dev, irq, NULL, mrfld_pwrbtn_interrupt, |
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IRQF_ONESHOT | IRQF_SHARED, pdev->name, |
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input); |
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if (ret) |
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return ret; |
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regmap_update_bits(pmic->regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_PWRBTN, 0); |
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regmap_update_bits(pmic->regmap, BCOVE_MPBIRQ, BCOVE_PBIRQ_PBTN, 0); |
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device_init_wakeup(dev, true); |
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dev_pm_set_wake_irq(dev, irq); |
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return 0; |
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} |
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static int mrfld_pwrbtn_remove(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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dev_pm_clear_wake_irq(dev); |
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device_init_wakeup(dev, false); |
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return 0; |
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} |
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static const struct platform_device_id mrfld_pwrbtn_id_table[] = { |
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{ .name = "mrfld_bcove_pwrbtn" }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(platform, mrfld_pwrbtn_id_table); |
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static struct platform_driver mrfld_pwrbtn_driver = { |
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.driver = { |
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.name = "mrfld_bcove_pwrbtn", |
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}, |
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.probe = mrfld_pwrbtn_probe, |
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.remove = mrfld_pwrbtn_remove, |
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.id_table = mrfld_pwrbtn_id_table, |
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}; |
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module_platform_driver(mrfld_pwrbtn_driver); |
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MODULE_DESCRIPTION("Power-button driver for Basin Cove PMIC"); |
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MODULE_LICENSE("GPL v2");
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