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115 lines
2.8 KiB
115 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* NXP PCF50633 Input Driver |
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* |
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* (C) 2006-2008 by Openmoko, Inc. |
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* Author: Balaji Rao <[email protected]> |
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* All rights reserved. |
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* |
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* Broken down from monstrous PCF50633 driver mainly by |
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* Harald Welte, Andy Green and Werner Almesberger |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/device.h> |
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#include <linux/platform_device.h> |
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#include <linux/input.h> |
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#include <linux/slab.h> |
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#include <linux/mfd/pcf50633/core.h> |
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#define PCF50633_OOCSTAT_ONKEY 0x01 |
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#define PCF50633_REG_OOCSTAT 0x12 |
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#define PCF50633_REG_OOCMODE 0x10 |
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struct pcf50633_input { |
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struct pcf50633 *pcf; |
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struct input_dev *input_dev; |
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}; |
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static void |
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pcf50633_input_irq(int irq, void *data) |
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{ |
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struct pcf50633_input *input; |
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int onkey_released; |
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input = data; |
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/* We report only one event depending on the key press status */ |
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onkey_released = pcf50633_reg_read(input->pcf, PCF50633_REG_OOCSTAT) |
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& PCF50633_OOCSTAT_ONKEY; |
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if (irq == PCF50633_IRQ_ONKEYF && !onkey_released) |
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input_report_key(input->input_dev, KEY_POWER, 1); |
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else if (irq == PCF50633_IRQ_ONKEYR && onkey_released) |
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input_report_key(input->input_dev, KEY_POWER, 0); |
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input_sync(input->input_dev); |
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} |
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static int pcf50633_input_probe(struct platform_device *pdev) |
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{ |
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struct pcf50633_input *input; |
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struct input_dev *input_dev; |
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int ret; |
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input = kzalloc(sizeof(*input), GFP_KERNEL); |
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if (!input) |
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return -ENOMEM; |
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input_dev = input_allocate_device(); |
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if (!input_dev) { |
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kfree(input); |
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return -ENOMEM; |
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} |
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platform_set_drvdata(pdev, input); |
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input->pcf = dev_to_pcf50633(pdev->dev.parent); |
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input->input_dev = input_dev; |
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input_dev->name = "PCF50633 PMU events"; |
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input_dev->id.bustype = BUS_I2C; |
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input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_PWR); |
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set_bit(KEY_POWER, input_dev->keybit); |
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ret = input_register_device(input_dev); |
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if (ret) { |
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input_free_device(input_dev); |
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kfree(input); |
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return ret; |
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} |
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pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYR, |
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pcf50633_input_irq, input); |
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pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYF, |
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pcf50633_input_irq, input); |
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return 0; |
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} |
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static int pcf50633_input_remove(struct platform_device *pdev) |
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{ |
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struct pcf50633_input *input = platform_get_drvdata(pdev); |
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pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYR); |
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pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYF); |
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input_unregister_device(input->input_dev); |
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kfree(input); |
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return 0; |
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} |
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static struct platform_driver pcf50633_input_driver = { |
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.driver = { |
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.name = "pcf50633-input", |
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}, |
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.probe = pcf50633_input_probe, |
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.remove = pcf50633_input_remove, |
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}; |
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module_platform_driver(pcf50633_input_driver); |
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MODULE_AUTHOR("Balaji Rao <[email protected]>"); |
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MODULE_DESCRIPTION("PCF50633 input driver"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:pcf50633-input");
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