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94 lines
2.3 KiB
94 lines
2.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Power-button driver for Dollar Cove TI PMIC |
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* Copyright (C) 2014 Intel Corp |
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* Copyright (c) 2017 Takashi Iwai <[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/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 CHTDC_TI_SIRQ_REG 0x3 |
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#define SIRQ_PWRBTN_REL BIT(0) |
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static irqreturn_t chtdc_ti_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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int state; |
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if (!regmap_read(regmap, CHTDC_TI_SIRQ_REG, &state)) { |
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dev_dbg(dev, "SIRQ_REG=0x%x\n", state); |
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input_report_key(input, KEY_POWER, !(state & SIRQ_PWRBTN_REL)); |
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input_sync(input); |
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} |
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return IRQ_HANDLED; |
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} |
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static int chtdc_ti_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, err; |
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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_set_capability(input, EV_KEY, KEY_POWER); |
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err = input_register_device(input); |
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if (err) |
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return err; |
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dev_set_drvdata(dev, pmic->regmap); |
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err = devm_request_threaded_irq(dev, irq, NULL, |
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chtdc_ti_pwrbtn_interrupt, |
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IRQF_ONESHOT, KBUILD_MODNAME, input); |
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if (err) |
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return err; |
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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 chtdc_ti_pwrbtn_remove(struct platform_device *pdev) |
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{ |
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dev_pm_clear_wake_irq(&pdev->dev); |
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device_init_wakeup(&pdev->dev, false); |
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return 0; |
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} |
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static const struct platform_device_id chtdc_ti_pwrbtn_id_table[] = { |
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{ .name = "chtdc_ti_pwrbtn" }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(platform, chtdc_ti_pwrbtn_id_table); |
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static struct platform_driver chtdc_ti_pwrbtn_driver = { |
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.driver = { |
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.name = KBUILD_MODNAME, |
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}, |
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.probe = chtdc_ti_pwrbtn_probe, |
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.remove = chtdc_ti_pwrbtn_remove, |
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.id_table = chtdc_ti_pwrbtn_id_table, |
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}; |
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module_platform_driver(chtdc_ti_pwrbtn_driver); |
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MODULE_DESCRIPTION("Power-button driver for Dollar Cove TI PMIC"); |
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MODULE_LICENSE("GPL v2");
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