207 lines
5.1 KiB
C
207 lines
5.1 KiB
C
/*
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* Driver for the PF1550 ON_KEY
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* Copyright (C) 2016 Freescale Semiconductor, Inc. All Rights Reserved.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mfd/pf1550.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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struct onkey_drv_data {
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struct device *dev;
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struct pf1550_dev *pf1550;
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int irq;
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int keycode;
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int wakeup;
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struct input_dev *input;
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};
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static struct pf1550_irq_info pf1550_onkey_irqs[] = {
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{ PF1550_ONKEY_IRQ_PUSHI, "release" },
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{ PF1550_ONKEY_IRQ_1SI, "1S" },
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{ PF1550_ONKEY_IRQ_2SI, "2S" },
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{ PF1550_ONKEY_IRQ_3SI, "3S" },
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{ PF1550_ONKEY_IRQ_4SI, "4S" },
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{ PF1550_ONKEY_IRQ_8SI, "8S" },
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};
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static irqreturn_t pf1550_onkey_irq_handler(int irq, void *data)
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{
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struct onkey_drv_data *onkey = data;
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int i, state, irq_type = -1;
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onkey->irq = irq;
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for (i = 0; i < ARRAY_SIZE(pf1550_onkey_irqs); i++)
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if (onkey->irq == pf1550_onkey_irqs[i].virq)
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irq_type = pf1550_onkey_irqs[i].irq;
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switch (irq_type) {
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case PF1550_ONKEY_IRQ_PUSHI:
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state = 0;
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break;
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case PF1550_ONKEY_IRQ_1SI:
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case PF1550_ONKEY_IRQ_2SI:
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case PF1550_ONKEY_IRQ_3SI:
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case PF1550_ONKEY_IRQ_4SI:
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case PF1550_ONKEY_IRQ_8SI:
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state = 1;
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break;
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default:
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dev_err(onkey->dev, "onkey interrupt: irq %d occurred\n",
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irq_type);
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return IRQ_HANDLED;
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}
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input_event(onkey->input, EV_KEY, onkey->keycode, state);
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input_sync(onkey->input);
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return IRQ_HANDLED;
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}
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static int pf1550_onkey_probe(struct platform_device *pdev)
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{
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struct onkey_drv_data *onkey;
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struct input_dev *input = NULL;
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struct device_node *np = pdev->dev.of_node;
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struct pf1550_dev *pf1550 = dev_get_drvdata(pdev->dev.parent);
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int i, error;
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if (!np)
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return -ENODEV;
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onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL);
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if (!onkey)
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return -ENOMEM;
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if (of_property_read_u32(np, "linux,keycode", &onkey->keycode)) {
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onkey->keycode = KEY_POWER;
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dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n");
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}
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onkey->wakeup = of_property_read_bool(np, "wakeup");
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input = devm_input_allocate_device(&pdev->dev);
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if (!input) {
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dev_err(&pdev->dev, "failed to allocate the input device\n");
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return -ENOMEM;
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}
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input->name = pdev->name;
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input->phys = "pf1550-onkey/input0";
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input->id.bustype = BUS_HOST;
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input_set_capability(input, EV_KEY, onkey->keycode);
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for (i = 0; i < ARRAY_SIZE(pf1550_onkey_irqs); i++) {
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struct pf1550_irq_info *onkey_irq =
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&pf1550_onkey_irqs[i];
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unsigned int virq = 0;
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virq = regmap_irq_get_virq(pf1550->irq_data_onkey,
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onkey_irq->irq);
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if (!virq)
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return -EINVAL;
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onkey_irq->virq = virq;
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error = devm_request_threaded_irq(&pdev->dev, virq, NULL,
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pf1550_onkey_irq_handler,
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IRQF_NO_SUSPEND,
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onkey_irq->name, onkey);
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if (error) {
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dev_err(&pdev->dev,
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"failed: irq request (IRQ: %d, error :%d)\n",
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onkey_irq->irq, error);
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return error;
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}
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}
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error = input_register_device(input);
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if (error < 0) {
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dev_err(&pdev->dev, "failed to register input device\n");
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input_free_device(input);
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return error;
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}
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onkey->input = input;
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onkey->pf1550 = pf1550;
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platform_set_drvdata(pdev, onkey);
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device_init_wakeup(&pdev->dev, onkey->wakeup);
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return 0;
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}
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static int pf1550_onkey_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct onkey_drv_data *onkey = platform_get_drvdata(pdev);
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if (!device_may_wakeup(&pdev->dev))
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regmap_write(onkey->pf1550->regmap,
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PF1550_PMIC_REG_ONKEY_INT_MASK0,
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ONKEY_IRQ_PUSHI | ONKEY_IRQ_1SI | ONKEY_IRQ_2SI |
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ONKEY_IRQ_3SI | ONKEY_IRQ_4SI | ONKEY_IRQ_8SI);
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else
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enable_irq_wake(onkey->pf1550->irq);
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return 0;
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}
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static int pf1550_onkey_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct onkey_drv_data *onkey = platform_get_drvdata(pdev);
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if (!device_may_wakeup(&pdev->dev))
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regmap_write(onkey->pf1550->regmap,
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PF1550_PMIC_REG_ONKEY_INT_MASK0,
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~(ONKEY_IRQ_PUSHI | ONKEY_IRQ_1SI | ONKEY_IRQ_2SI |
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ONKEY_IRQ_3SI | ONKEY_IRQ_4SI | ONKEY_IRQ_8SI));
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else
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disable_irq_wake(onkey->pf1550->irq);
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return 0;
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}
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static const struct of_device_id pf1550_onkey_ids[] = {
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{ .compatible = "fsl,pf1550-onkey" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, pf1550_onkey_ids);
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static SIMPLE_DEV_PM_OPS(pf1550_onkey_pm_ops, pf1550_onkey_suspend,
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pf1550_onkey_resume);
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static struct platform_driver pf1550_onkey_driver = {
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.driver = {
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.name = "pf1550-onkey",
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.pm = &pf1550_onkey_pm_ops,
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.of_match_table = pf1550_onkey_ids,
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},
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.probe = pf1550_onkey_probe,
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};
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module_platform_driver(pf1550_onkey_driver);
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MODULE_AUTHOR("Freescale Semiconductor");
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MODULE_DESCRIPTION(" PF1550 onkey Driver");
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MODULE_LICENSE("GPL");
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