1ab30e1a9SDuje Mihanović // SPDX-License-Identifier: GPL-2.0-only
296c905f4SQiao Zhou /*
396c905f4SQiao Zhou * Marvell 88PM80x ONKEY driver
496c905f4SQiao Zhou *
596c905f4SQiao Zhou * Copyright (C) 2012 Marvell International Ltd.
696c905f4SQiao Zhou * Haojian Zhuang <haojian.zhuang@marvell.com>
796c905f4SQiao Zhou * Qiao Zhou <zhouqiao@marvell.com>
896c905f4SQiao Zhou */
996c905f4SQiao Zhou
1096c905f4SQiao Zhou #include <linux/kernel.h>
1196c905f4SQiao Zhou #include <linux/module.h>
1296c905f4SQiao Zhou #include <linux/input.h>
1396c905f4SQiao Zhou #include <linux/mfd/88pm80x.h>
1496c905f4SQiao Zhou #include <linux/regmap.h>
1596c905f4SQiao Zhou #include <linux/slab.h>
1696c905f4SQiao Zhou
1796c905f4SQiao Zhou #define PM800_LONG_ONKEY_EN (1 << 0)
1896c905f4SQiao Zhou #define PM800_LONG_KEY_DELAY (8) /* 1 .. 16 seconds */
1996c905f4SQiao Zhou #define PM800_LONKEY_PRESS_TIME ((PM800_LONG_KEY_DELAY-1) << 4)
2096c905f4SQiao Zhou #define PM800_LONKEY_PRESS_TIME_MASK (0xF0)
2196c905f4SQiao Zhou #define PM800_SW_PDOWN (1 << 5)
2296c905f4SQiao Zhou
2396c905f4SQiao Zhou struct pm80x_onkey_info {
2496c905f4SQiao Zhou struct input_dev *idev;
2596c905f4SQiao Zhou struct pm80x_chip *pm80x;
2696c905f4SQiao Zhou struct regmap *map;
2796c905f4SQiao Zhou int irq;
2896c905f4SQiao Zhou };
2996c905f4SQiao Zhou
3096c905f4SQiao Zhou /* 88PM80x gives us an interrupt when ONKEY is held */
pm80x_onkey_handler(int irq,void * data)3196c905f4SQiao Zhou static irqreturn_t pm80x_onkey_handler(int irq, void *data)
3296c905f4SQiao Zhou {
3396c905f4SQiao Zhou struct pm80x_onkey_info *info = data;
3496c905f4SQiao Zhou int ret = 0;
3596c905f4SQiao Zhou unsigned int val;
3696c905f4SQiao Zhou
3796c905f4SQiao Zhou ret = regmap_read(info->map, PM800_STATUS_1, &val);
3896c905f4SQiao Zhou if (ret < 0) {
3996c905f4SQiao Zhou dev_err(info->idev->dev.parent, "failed to read status: %d\n", ret);
4096c905f4SQiao Zhou return IRQ_NONE;
4196c905f4SQiao Zhou }
4296c905f4SQiao Zhou val &= PM800_ONKEY_STS1;
4396c905f4SQiao Zhou
4496c905f4SQiao Zhou input_report_key(info->idev, KEY_POWER, val);
4596c905f4SQiao Zhou input_sync(info->idev);
4696c905f4SQiao Zhou
4796c905f4SQiao Zhou return IRQ_HANDLED;
4896c905f4SQiao Zhou }
4996c905f4SQiao Zhou
5096c905f4SQiao Zhou static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_dev_suspend,
5196c905f4SQiao Zhou pm80x_dev_resume);
5296c905f4SQiao Zhou
pm80x_onkey_probe(struct platform_device * pdev)535298cc4cSBill Pemberton static int pm80x_onkey_probe(struct platform_device *pdev)
5496c905f4SQiao Zhou {
5596c905f4SQiao Zhou
5696c905f4SQiao Zhou struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
5796c905f4SQiao Zhou struct pm80x_onkey_info *info;
5896c905f4SQiao Zhou int err;
5996c905f4SQiao Zhou
60*a0bd7adaSErick Archer info = kzalloc(sizeof(*info), GFP_KERNEL);
6196c905f4SQiao Zhou if (!info)
6296c905f4SQiao Zhou return -ENOMEM;
6396c905f4SQiao Zhou
6496c905f4SQiao Zhou info->pm80x = chip;
6596c905f4SQiao Zhou
6696c905f4SQiao Zhou info->irq = platform_get_irq(pdev, 0);
6796c905f4SQiao Zhou if (info->irq < 0) {
6896c905f4SQiao Zhou err = -EINVAL;
6996c905f4SQiao Zhou goto out;
7096c905f4SQiao Zhou }
7196c905f4SQiao Zhou
7296c905f4SQiao Zhou info->map = info->pm80x->regmap;
7396c905f4SQiao Zhou if (!info->map) {
7496c905f4SQiao Zhou dev_err(&pdev->dev, "no regmap!\n");
7596c905f4SQiao Zhou err = -EINVAL;
7696c905f4SQiao Zhou goto out;
7796c905f4SQiao Zhou }
7896c905f4SQiao Zhou
7996c905f4SQiao Zhou info->idev = input_allocate_device();
8096c905f4SQiao Zhou if (!info->idev) {
8196c905f4SQiao Zhou dev_err(&pdev->dev, "Failed to allocate input dev\n");
8296c905f4SQiao Zhou err = -ENOMEM;
8396c905f4SQiao Zhou goto out;
8496c905f4SQiao Zhou }
8596c905f4SQiao Zhou
8696c905f4SQiao Zhou info->idev->name = "88pm80x_on";
8796c905f4SQiao Zhou info->idev->phys = "88pm80x_on/input0";
8896c905f4SQiao Zhou info->idev->id.bustype = BUS_I2C;
8996c905f4SQiao Zhou info->idev->dev.parent = &pdev->dev;
9096c905f4SQiao Zhou info->idev->evbit[0] = BIT_MASK(EV_KEY);
9196c905f4SQiao Zhou __set_bit(KEY_POWER, info->idev->keybit);
9296c905f4SQiao Zhou
9396c905f4SQiao Zhou err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler,
9496c905f4SQiao Zhou IRQF_ONESHOT, "onkey", info);
9596c905f4SQiao Zhou if (err < 0) {
9696c905f4SQiao Zhou dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n",
9796c905f4SQiao Zhou info->irq, err);
9896c905f4SQiao Zhou goto out_reg;
9996c905f4SQiao Zhou }
10096c905f4SQiao Zhou
10196c905f4SQiao Zhou err = input_register_device(info->idev);
10296c905f4SQiao Zhou if (err) {
10396c905f4SQiao Zhou dev_err(&pdev->dev, "Can't register input device: %d\n", err);
10496c905f4SQiao Zhou goto out_irq;
10596c905f4SQiao Zhou }
10696c905f4SQiao Zhou
10796c905f4SQiao Zhou platform_set_drvdata(pdev, info);
10896c905f4SQiao Zhou
10996c905f4SQiao Zhou /* Enable long onkey detection */
11096c905f4SQiao Zhou regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN,
11196c905f4SQiao Zhou PM800_LONG_ONKEY_EN);
11296c905f4SQiao Zhou /* Set 8-second interval */
11396c905f4SQiao Zhou regmap_update_bits(info->map, PM800_RTC_MISC3,
11496c905f4SQiao Zhou PM800_LONKEY_PRESS_TIME_MASK,
11596c905f4SQiao Zhou PM800_LONKEY_PRESS_TIME);
11696c905f4SQiao Zhou
11796c905f4SQiao Zhou device_init_wakeup(&pdev->dev, 1);
11896c905f4SQiao Zhou return 0;
11996c905f4SQiao Zhou
12096c905f4SQiao Zhou out_irq:
12196c905f4SQiao Zhou pm80x_free_irq(info->pm80x, info->irq, info);
12296c905f4SQiao Zhou out_reg:
12396c905f4SQiao Zhou input_free_device(info->idev);
12496c905f4SQiao Zhou out:
12596c905f4SQiao Zhou kfree(info);
12696c905f4SQiao Zhou return err;
12796c905f4SQiao Zhou }
12896c905f4SQiao Zhou
pm80x_onkey_remove(struct platform_device * pdev)1293e2ccfd9SUwe Kleine-König static void pm80x_onkey_remove(struct platform_device *pdev)
13096c905f4SQiao Zhou {
13196c905f4SQiao Zhou struct pm80x_onkey_info *info = platform_get_drvdata(pdev);
13296c905f4SQiao Zhou
13396c905f4SQiao Zhou pm80x_free_irq(info->pm80x, info->irq, info);
13496c905f4SQiao Zhou input_unregister_device(info->idev);
13596c905f4SQiao Zhou kfree(info);
13696c905f4SQiao Zhou }
13796c905f4SQiao Zhou
13896c905f4SQiao Zhou static struct platform_driver pm80x_onkey_driver = {
13996c905f4SQiao Zhou .driver = {
14096c905f4SQiao Zhou .name = "88pm80x-onkey",
14196c905f4SQiao Zhou .pm = &pm80x_onkey_pm_ops,
14296c905f4SQiao Zhou },
14396c905f4SQiao Zhou .probe = pm80x_onkey_probe,
1443e2ccfd9SUwe Kleine-König .remove_new = pm80x_onkey_remove,
14596c905f4SQiao Zhou };
14696c905f4SQiao Zhou
14796c905f4SQiao Zhou module_platform_driver(pm80x_onkey_driver);
14896c905f4SQiao Zhou
14996c905f4SQiao Zhou MODULE_LICENSE("GPL");
15096c905f4SQiao Zhou MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver");
15196c905f4SQiao Zhou MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
15296c905f4SQiao Zhou MODULE_ALIAS("platform:88pm80x-onkey");
153