196c905f4SQiao Zhou /*
296c905f4SQiao Zhou * Marvell 88PM80x ONKEY driver
396c905f4SQiao Zhou *
496c905f4SQiao Zhou * Copyright (C) 2012 Marvell International Ltd.
596c905f4SQiao Zhou * Haojian Zhuang <haojian.zhuang@marvell.com>
696c905f4SQiao Zhou * Qiao Zhou <zhouqiao@marvell.com>
796c905f4SQiao Zhou *
896c905f4SQiao Zhou * This file is subject to the terms and conditions of the GNU General
996c905f4SQiao Zhou * Public License. See the file "COPYING" in the main directory of this
1096c905f4SQiao Zhou * archive for more details.
1196c905f4SQiao Zhou *
1296c905f4SQiao Zhou * This program is distributed in the hope that it will be useful,
1396c905f4SQiao Zhou * but WITHOUT ANY WARRANTY; without even the implied warranty of
1496c905f4SQiao Zhou * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1596c905f4SQiao Zhou * GNU General Public License for more details.
1696c905f4SQiao Zhou *
1796c905f4SQiao Zhou * You should have received a copy of the GNU General Public License
1896c905f4SQiao Zhou * along with this program; if not, write to the Free Software
1996c905f4SQiao Zhou * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
2096c905f4SQiao Zhou */
2196c905f4SQiao Zhou
2296c905f4SQiao Zhou #include <linux/kernel.h>
2396c905f4SQiao Zhou #include <linux/module.h>
2496c905f4SQiao Zhou #include <linux/input.h>
2596c905f4SQiao Zhou #include <linux/mfd/88pm80x.h>
2696c905f4SQiao Zhou #include <linux/regmap.h>
2796c905f4SQiao Zhou #include <linux/slab.h>
2896c905f4SQiao Zhou
2996c905f4SQiao Zhou #define PM800_LONG_ONKEY_EN (1 << 0)
3096c905f4SQiao Zhou #define PM800_LONG_KEY_DELAY (8) /* 1 .. 16 seconds */
3196c905f4SQiao Zhou #define PM800_LONKEY_PRESS_TIME ((PM800_LONG_KEY_DELAY-1) << 4)
3296c905f4SQiao Zhou #define PM800_LONKEY_PRESS_TIME_MASK (0xF0)
3396c905f4SQiao Zhou #define PM800_SW_PDOWN (1 << 5)
3496c905f4SQiao Zhou
3596c905f4SQiao Zhou struct pm80x_onkey_info {
3696c905f4SQiao Zhou struct input_dev *idev;
3796c905f4SQiao Zhou struct pm80x_chip *pm80x;
3896c905f4SQiao Zhou struct regmap *map;
3996c905f4SQiao Zhou int irq;
4096c905f4SQiao Zhou };
4196c905f4SQiao Zhou
4296c905f4SQiao Zhou /* 88PM80x gives us an interrupt when ONKEY is held */
pm80x_onkey_handler(int irq,void * data)4396c905f4SQiao Zhou static irqreturn_t pm80x_onkey_handler(int irq, void *data)
4496c905f4SQiao Zhou {
4596c905f4SQiao Zhou struct pm80x_onkey_info *info = data;
4696c905f4SQiao Zhou int ret = 0;
4796c905f4SQiao Zhou unsigned int val;
4896c905f4SQiao Zhou
4996c905f4SQiao Zhou ret = regmap_read(info->map, PM800_STATUS_1, &val);
5096c905f4SQiao Zhou if (ret < 0) {
5196c905f4SQiao Zhou dev_err(info->idev->dev.parent, "failed to read status: %d\n", ret);
5296c905f4SQiao Zhou return IRQ_NONE;
5396c905f4SQiao Zhou }
5496c905f4SQiao Zhou val &= PM800_ONKEY_STS1;
5596c905f4SQiao Zhou
5696c905f4SQiao Zhou input_report_key(info->idev, KEY_POWER, val);
5796c905f4SQiao Zhou input_sync(info->idev);
5896c905f4SQiao Zhou
5996c905f4SQiao Zhou return IRQ_HANDLED;
6096c905f4SQiao Zhou }
6196c905f4SQiao Zhou
6296c905f4SQiao Zhou static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_dev_suspend,
6396c905f4SQiao Zhou pm80x_dev_resume);
6496c905f4SQiao Zhou
pm80x_onkey_probe(struct platform_device * pdev)655298cc4cSBill Pemberton static int pm80x_onkey_probe(struct platform_device *pdev)
6696c905f4SQiao Zhou {
6796c905f4SQiao Zhou
6896c905f4SQiao Zhou struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
6996c905f4SQiao Zhou struct pm80x_onkey_info *info;
7096c905f4SQiao Zhou int err;
7196c905f4SQiao Zhou
7296c905f4SQiao Zhou info = kzalloc(sizeof(struct pm80x_onkey_info), GFP_KERNEL);
7396c905f4SQiao Zhou if (!info)
7496c905f4SQiao Zhou return -ENOMEM;
7596c905f4SQiao Zhou
7696c905f4SQiao Zhou info->pm80x = chip;
7796c905f4SQiao Zhou
7896c905f4SQiao Zhou info->irq = platform_get_irq(pdev, 0);
7996c905f4SQiao Zhou if (info->irq < 0) {
8096c905f4SQiao Zhou err = -EINVAL;
8196c905f4SQiao Zhou goto out;
8296c905f4SQiao Zhou }
8396c905f4SQiao Zhou
8496c905f4SQiao Zhou info->map = info->pm80x->regmap;
8596c905f4SQiao Zhou if (!info->map) {
8696c905f4SQiao Zhou dev_err(&pdev->dev, "no regmap!\n");
8796c905f4SQiao Zhou err = -EINVAL;
8896c905f4SQiao Zhou goto out;
8996c905f4SQiao Zhou }
9096c905f4SQiao Zhou
9196c905f4SQiao Zhou info->idev = input_allocate_device();
9296c905f4SQiao Zhou if (!info->idev) {
9396c905f4SQiao Zhou dev_err(&pdev->dev, "Failed to allocate input dev\n");
9496c905f4SQiao Zhou err = -ENOMEM;
9596c905f4SQiao Zhou goto out;
9696c905f4SQiao Zhou }
9796c905f4SQiao Zhou
9896c905f4SQiao Zhou info->idev->name = "88pm80x_on";
9996c905f4SQiao Zhou info->idev->phys = "88pm80x_on/input0";
10096c905f4SQiao Zhou info->idev->id.bustype = BUS_I2C;
10196c905f4SQiao Zhou info->idev->dev.parent = &pdev->dev;
10296c905f4SQiao Zhou info->idev->evbit[0] = BIT_MASK(EV_KEY);
10396c905f4SQiao Zhou __set_bit(KEY_POWER, info->idev->keybit);
10496c905f4SQiao Zhou
10596c905f4SQiao Zhou err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler,
10696c905f4SQiao Zhou IRQF_ONESHOT, "onkey", info);
10796c905f4SQiao Zhou if (err < 0) {
10896c905f4SQiao Zhou dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n",
10996c905f4SQiao Zhou info->irq, err);
11096c905f4SQiao Zhou goto out_reg;
11196c905f4SQiao Zhou }
11296c905f4SQiao Zhou
11396c905f4SQiao Zhou err = input_register_device(info->idev);
11496c905f4SQiao Zhou if (err) {
11596c905f4SQiao Zhou dev_err(&pdev->dev, "Can't register input device: %d\n", err);
11696c905f4SQiao Zhou goto out_irq;
11796c905f4SQiao Zhou }
11896c905f4SQiao Zhou
11996c905f4SQiao Zhou platform_set_drvdata(pdev, info);
12096c905f4SQiao Zhou
12196c905f4SQiao Zhou /* Enable long onkey detection */
12296c905f4SQiao Zhou regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN,
12396c905f4SQiao Zhou PM800_LONG_ONKEY_EN);
12496c905f4SQiao Zhou /* Set 8-second interval */
12596c905f4SQiao Zhou regmap_update_bits(info->map, PM800_RTC_MISC3,
12696c905f4SQiao Zhou PM800_LONKEY_PRESS_TIME_MASK,
12796c905f4SQiao Zhou PM800_LONKEY_PRESS_TIME);
12896c905f4SQiao Zhou
12996c905f4SQiao Zhou device_init_wakeup(&pdev->dev, 1);
13096c905f4SQiao Zhou return 0;
13196c905f4SQiao Zhou
13296c905f4SQiao Zhou out_irq:
13396c905f4SQiao Zhou pm80x_free_irq(info->pm80x, info->irq, info);
13496c905f4SQiao Zhou out_reg:
13596c905f4SQiao Zhou input_free_device(info->idev);
13696c905f4SQiao Zhou out:
13796c905f4SQiao Zhou kfree(info);
13896c905f4SQiao Zhou return err;
13996c905f4SQiao Zhou }
14096c905f4SQiao Zhou
pm80x_onkey_remove(struct platform_device * pdev)141e2619cf7SBill Pemberton static int pm80x_onkey_remove(struct platform_device *pdev)
14296c905f4SQiao Zhou {
14396c905f4SQiao Zhou struct pm80x_onkey_info *info = platform_get_drvdata(pdev);
14496c905f4SQiao Zhou
14596c905f4SQiao Zhou pm80x_free_irq(info->pm80x, info->irq, info);
14696c905f4SQiao Zhou input_unregister_device(info->idev);
14796c905f4SQiao Zhou kfree(info);
14896c905f4SQiao Zhou return 0;
14996c905f4SQiao Zhou }
15096c905f4SQiao Zhou
15196c905f4SQiao Zhou static struct platform_driver pm80x_onkey_driver = {
15296c905f4SQiao Zhou .driver = {
15396c905f4SQiao Zhou .name = "88pm80x-onkey",
15496c905f4SQiao Zhou .pm = &pm80x_onkey_pm_ops,
15596c905f4SQiao Zhou },
15696c905f4SQiao Zhou .probe = pm80x_onkey_probe,
1571cb0aa88SBill Pemberton .remove = pm80x_onkey_remove,
15896c905f4SQiao Zhou };
15996c905f4SQiao Zhou
16096c905f4SQiao Zhou module_platform_driver(pm80x_onkey_driver);
16196c905f4SQiao Zhou
16296c905f4SQiao Zhou MODULE_LICENSE("GPL");
16396c905f4SQiao Zhou MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver");
16496c905f4SQiao Zhou MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
16596c905f4SQiao Zhou MODULE_ALIAS("platform:88pm80x-onkey");
166