a0bd7adadb
It is preferred to use sizeof(*pointer) instead of sizeof(type) due to the type of the variable can change and one needs not change the former (unlike the latter). This patch has no effect on runtime behavior. Signed-off-by: Erick Archer <erick.archer@outlook.com> Link: https://lore.kernel.org/r/AS8PR02MB7237884EB989EFF55D1BEF8B8BFE2@AS8PR02MB7237.eurprd02.prod.outlook.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
153 lines
3.6 KiB
C
153 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Marvell 88PM80x ONKEY driver
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*
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* Copyright (C) 2012 Marvell International Ltd.
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* Haojian Zhuang <haojian.zhuang@marvell.com>
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* Qiao Zhou <zhouqiao@marvell.com>
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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/input.h>
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#include <linux/mfd/88pm80x.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#define PM800_LONG_ONKEY_EN (1 << 0)
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#define PM800_LONG_KEY_DELAY (8) /* 1 .. 16 seconds */
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#define PM800_LONKEY_PRESS_TIME ((PM800_LONG_KEY_DELAY-1) << 4)
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#define PM800_LONKEY_PRESS_TIME_MASK (0xF0)
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#define PM800_SW_PDOWN (1 << 5)
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struct pm80x_onkey_info {
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struct input_dev *idev;
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struct pm80x_chip *pm80x;
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struct regmap *map;
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int irq;
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};
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/* 88PM80x gives us an interrupt when ONKEY is held */
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static irqreturn_t pm80x_onkey_handler(int irq, void *data)
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{
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struct pm80x_onkey_info *info = data;
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int ret = 0;
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unsigned int val;
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ret = regmap_read(info->map, PM800_STATUS_1, &val);
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if (ret < 0) {
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dev_err(info->idev->dev.parent, "failed to read status: %d\n", ret);
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return IRQ_NONE;
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}
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val &= PM800_ONKEY_STS1;
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input_report_key(info->idev, KEY_POWER, val);
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input_sync(info->idev);
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return IRQ_HANDLED;
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}
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static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_dev_suspend,
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pm80x_dev_resume);
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static int pm80x_onkey_probe(struct platform_device *pdev)
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{
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struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
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struct pm80x_onkey_info *info;
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int err;
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info = kzalloc(sizeof(*info), GFP_KERNEL);
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if (!info)
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return -ENOMEM;
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info->pm80x = chip;
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info->irq = platform_get_irq(pdev, 0);
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if (info->irq < 0) {
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err = -EINVAL;
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goto out;
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}
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info->map = info->pm80x->regmap;
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if (!info->map) {
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dev_err(&pdev->dev, "no regmap!\n");
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err = -EINVAL;
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goto out;
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}
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info->idev = input_allocate_device();
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if (!info->idev) {
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dev_err(&pdev->dev, "Failed to allocate input dev\n");
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err = -ENOMEM;
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goto out;
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}
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info->idev->name = "88pm80x_on";
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info->idev->phys = "88pm80x_on/input0";
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info->idev->id.bustype = BUS_I2C;
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info->idev->dev.parent = &pdev->dev;
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info->idev->evbit[0] = BIT_MASK(EV_KEY);
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__set_bit(KEY_POWER, info->idev->keybit);
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err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler,
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IRQF_ONESHOT, "onkey", info);
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if (err < 0) {
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dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n",
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info->irq, err);
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goto out_reg;
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}
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err = input_register_device(info->idev);
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if (err) {
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dev_err(&pdev->dev, "Can't register input device: %d\n", err);
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goto out_irq;
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}
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platform_set_drvdata(pdev, info);
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/* Enable long onkey detection */
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regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN,
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PM800_LONG_ONKEY_EN);
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/* Set 8-second interval */
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regmap_update_bits(info->map, PM800_RTC_MISC3,
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PM800_LONKEY_PRESS_TIME_MASK,
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PM800_LONKEY_PRESS_TIME);
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device_init_wakeup(&pdev->dev, 1);
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return 0;
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out_irq:
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pm80x_free_irq(info->pm80x, info->irq, info);
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out_reg:
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input_free_device(info->idev);
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out:
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kfree(info);
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return err;
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}
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static void pm80x_onkey_remove(struct platform_device *pdev)
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{
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struct pm80x_onkey_info *info = platform_get_drvdata(pdev);
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pm80x_free_irq(info->pm80x, info->irq, info);
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input_unregister_device(info->idev);
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kfree(info);
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}
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static struct platform_driver pm80x_onkey_driver = {
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.driver = {
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.name = "88pm80x-onkey",
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.pm = &pm80x_onkey_pm_ops,
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},
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.probe = pm80x_onkey_probe,
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.remove_new = pm80x_onkey_remove,
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};
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module_platform_driver(pm80x_onkey_driver);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver");
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MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
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MODULE_ALIAS("platform:88pm80x-onkey");
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