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Marvell 88PM886 PMIC provides onkey among other things. Add client driver to handle it. The driver currently only provides a basic support omitting additional functions found in the vendor version, such as long onkey and GPIO integration. Signed-off-by: Karel Balej <balejk@matfyz.cz> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Link: https://lore.kernel.org/r/20240531175109.15599-5-balejk@matfyz.cz Signed-off-by: Lee Jones <lee@kernel.org>
99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/88pm886.h>
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struct pm886_onkey {
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struct input_dev *idev;
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struct pm886_chip *chip;
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};
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static irqreturn_t pm886_onkey_irq_handler(int irq, void *data)
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{
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struct pm886_onkey *onkey = data;
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struct regmap *regmap = onkey->chip->regmap;
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struct input_dev *idev = onkey->idev;
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struct device *parent = idev->dev.parent;
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unsigned int val;
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int err;
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err = regmap_read(regmap, PM886_REG_STATUS1, &val);
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if (err) {
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dev_err(parent, "Failed to read status: %d\n", err);
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return IRQ_NONE;
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}
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val &= PM886_ONKEY_STS1;
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input_report_key(idev, KEY_POWER, val);
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input_sync(idev);
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return IRQ_HANDLED;
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}
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static int pm886_onkey_probe(struct platform_device *pdev)
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{
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struct pm886_chip *chip = dev_get_drvdata(pdev->dev.parent);
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struct device *dev = &pdev->dev;
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struct pm886_onkey *onkey;
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struct input_dev *idev;
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int irq, err;
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onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL);
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if (!onkey)
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return -ENOMEM;
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onkey->chip = chip;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return dev_err_probe(dev, irq, "Failed to get IRQ\n");
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idev = devm_input_allocate_device(dev);
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if (!idev) {
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dev_err(dev, "Failed to allocate input device\n");
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return -ENOMEM;
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}
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onkey->idev = idev;
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idev->name = "88pm886-onkey";
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idev->phys = "88pm886-onkey/input0";
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idev->id.bustype = BUS_I2C;
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input_set_capability(idev, EV_KEY, KEY_POWER);
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err = devm_request_threaded_irq(dev, irq, NULL, pm886_onkey_irq_handler,
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IRQF_ONESHOT | IRQF_NO_SUSPEND, "onkey",
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onkey);
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if (err)
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return dev_err_probe(dev, err, "Failed to request IRQ\n");
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err = input_register_device(idev);
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if (err)
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return dev_err_probe(dev, err, "Failed to register input device\n");
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return 0;
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}
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static const struct platform_device_id pm886_onkey_id_table[] = {
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{ "88pm886-onkey", },
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{ }
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};
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MODULE_DEVICE_TABLE(platform, pm886_onkey_id_table);
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static struct platform_driver pm886_onkey_driver = {
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.driver = {
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.name = "88pm886-onkey",
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},
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.probe = pm886_onkey_probe,
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.id_table = pm886_onkey_id_table,
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};
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module_platform_driver(pm886_onkey_driver);
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MODULE_DESCRIPTION("Marvell 88PM886 onkey driver");
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MODULE_AUTHOR("Karel Balej <balejk@matfyz.cz>");
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MODULE_LICENSE("GPL");
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