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 */ 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 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 dev_err(&pdev->dev, "No IRQ resource!\n"); 8196c905f4SQiao Zhou err = -EINVAL; 8296c905f4SQiao Zhou goto out; 8396c905f4SQiao Zhou } 8496c905f4SQiao Zhou 8596c905f4SQiao Zhou info->map = info->pm80x->regmap; 8696c905f4SQiao Zhou if (!info->map) { 8796c905f4SQiao Zhou dev_err(&pdev->dev, "no regmap!\n"); 8896c905f4SQiao Zhou err = -EINVAL; 8996c905f4SQiao Zhou goto out; 9096c905f4SQiao Zhou } 9196c905f4SQiao Zhou 9296c905f4SQiao Zhou info->idev = input_allocate_device(); 9396c905f4SQiao Zhou if (!info->idev) { 9496c905f4SQiao Zhou dev_err(&pdev->dev, "Failed to allocate input dev\n"); 9596c905f4SQiao Zhou err = -ENOMEM; 9696c905f4SQiao Zhou goto out; 9796c905f4SQiao Zhou } 9896c905f4SQiao Zhou 9996c905f4SQiao Zhou info->idev->name = "88pm80x_on"; 10096c905f4SQiao Zhou info->idev->phys = "88pm80x_on/input0"; 10196c905f4SQiao Zhou info->idev->id.bustype = BUS_I2C; 10296c905f4SQiao Zhou info->idev->dev.parent = &pdev->dev; 10396c905f4SQiao Zhou info->idev->evbit[0] = BIT_MASK(EV_KEY); 10496c905f4SQiao Zhou __set_bit(KEY_POWER, info->idev->keybit); 10596c905f4SQiao Zhou 10696c905f4SQiao Zhou err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler, 10796c905f4SQiao Zhou IRQF_ONESHOT, "onkey", info); 10896c905f4SQiao Zhou if (err < 0) { 10996c905f4SQiao Zhou dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n", 11096c905f4SQiao Zhou info->irq, err); 11196c905f4SQiao Zhou goto out_reg; 11296c905f4SQiao Zhou } 11396c905f4SQiao Zhou 11496c905f4SQiao Zhou err = input_register_device(info->idev); 11596c905f4SQiao Zhou if (err) { 11696c905f4SQiao Zhou dev_err(&pdev->dev, "Can't register input device: %d\n", err); 11796c905f4SQiao Zhou goto out_irq; 11896c905f4SQiao Zhou } 11996c905f4SQiao Zhou 12096c905f4SQiao Zhou platform_set_drvdata(pdev, info); 12196c905f4SQiao Zhou 12296c905f4SQiao Zhou /* Enable long onkey detection */ 12396c905f4SQiao Zhou regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN, 12496c905f4SQiao Zhou PM800_LONG_ONKEY_EN); 12596c905f4SQiao Zhou /* Set 8-second interval */ 12696c905f4SQiao Zhou regmap_update_bits(info->map, PM800_RTC_MISC3, 12796c905f4SQiao Zhou PM800_LONKEY_PRESS_TIME_MASK, 12896c905f4SQiao Zhou PM800_LONKEY_PRESS_TIME); 12996c905f4SQiao Zhou 13096c905f4SQiao Zhou device_init_wakeup(&pdev->dev, 1); 13196c905f4SQiao Zhou return 0; 13296c905f4SQiao Zhou 13396c905f4SQiao Zhou out_irq: 13496c905f4SQiao Zhou pm80x_free_irq(info->pm80x, info->irq, info); 13596c905f4SQiao Zhou out_reg: 13696c905f4SQiao Zhou input_free_device(info->idev); 13796c905f4SQiao Zhou out: 13896c905f4SQiao Zhou kfree(info); 13996c905f4SQiao Zhou return err; 14096c905f4SQiao Zhou } 14196c905f4SQiao Zhou 14296c905f4SQiao Zhou static int __devexit pm80x_onkey_remove(struct platform_device *pdev) 14396c905f4SQiao Zhou { 14496c905f4SQiao Zhou struct pm80x_onkey_info *info = platform_get_drvdata(pdev); 14596c905f4SQiao Zhou 14696c905f4SQiao Zhou device_init_wakeup(&pdev->dev, 0); 14796c905f4SQiao Zhou pm80x_free_irq(info->pm80x, info->irq, info); 14896c905f4SQiao Zhou input_unregister_device(info->idev); 14996c905f4SQiao Zhou kfree(info); 15096c905f4SQiao Zhou return 0; 15196c905f4SQiao Zhou } 15296c905f4SQiao Zhou 15396c905f4SQiao Zhou static struct platform_driver pm80x_onkey_driver = { 15496c905f4SQiao Zhou .driver = { 15596c905f4SQiao Zhou .name = "88pm80x-onkey", 15696c905f4SQiao Zhou .owner = THIS_MODULE, 15796c905f4SQiao Zhou .pm = &pm80x_onkey_pm_ops, 15896c905f4SQiao Zhou }, 15996c905f4SQiao Zhou .probe = pm80x_onkey_probe, 1601cb0aa88SBill Pemberton .remove = pm80x_onkey_remove, 16196c905f4SQiao Zhou }; 16296c905f4SQiao Zhou 16396c905f4SQiao Zhou module_platform_driver(pm80x_onkey_driver); 16496c905f4SQiao Zhou 16596c905f4SQiao Zhou MODULE_LICENSE("GPL"); 16696c905f4SQiao Zhou MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver"); 16796c905f4SQiao Zhou MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>"); 16896c905f4SQiao Zhou MODULE_ALIAS("platform:88pm80x-onkey"); 169