169854031SHaojian Zhuang /* 269854031SHaojian Zhuang * 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver 369854031SHaojian Zhuang * 469854031SHaojian Zhuang * Copyright (C) 2009-2010 Marvell International Ltd. 569854031SHaojian Zhuang * Haojian Zhuang <haojian.zhuang@marvell.com> 669854031SHaojian Zhuang * 769854031SHaojian Zhuang * This file is subject to the terms and conditions of the GNU General 869854031SHaojian Zhuang * Public License. See the file "COPYING" in the main directory of this 969854031SHaojian Zhuang * archive for more details. 1069854031SHaojian Zhuang * 1169854031SHaojian Zhuang * This program is distributed in the hope that it will be useful, 1269854031SHaojian Zhuang * but WITHOUT ANY WARRANTY; without even the implied warranty of 1369854031SHaojian Zhuang * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1469854031SHaojian Zhuang * GNU General Public License for more details. 1569854031SHaojian Zhuang * 1669854031SHaojian Zhuang * You should have received a copy of the GNU General Public License 1769854031SHaojian Zhuang * along with this program; if not, write to the Free Software 1869854031SHaojian Zhuang * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 1969854031SHaojian Zhuang */ 2069854031SHaojian Zhuang 2169854031SHaojian Zhuang #include <linux/kernel.h> 2269854031SHaojian Zhuang #include <linux/module.h> 2369854031SHaojian Zhuang #include <linux/platform_device.h> 2469854031SHaojian Zhuang #include <linux/i2c.h> 2569854031SHaojian Zhuang #include <linux/input.h> 2669854031SHaojian Zhuang #include <linux/interrupt.h> 2769854031SHaojian Zhuang #include <linux/mfd/88pm860x.h> 285a0e3ad6STejun Heo #include <linux/slab.h> 29cde51e73SHimangi Saraogi #include <linux/device.h> 3069854031SHaojian Zhuang 3169854031SHaojian Zhuang #define PM8607_WAKEUP 0x0b 3269854031SHaojian Zhuang 3369854031SHaojian Zhuang #define LONG_ONKEY_EN (1 << 1) 3469854031SHaojian Zhuang #define ONKEY_STATUS (1 << 0) 3569854031SHaojian Zhuang 3669854031SHaojian Zhuang struct pm860x_onkey_info { 3769854031SHaojian Zhuang struct input_dev *idev; 3869854031SHaojian Zhuang struct pm860x_chip *chip; 3969854031SHaojian Zhuang struct i2c_client *i2c; 4069854031SHaojian Zhuang struct device *dev; 4169854031SHaojian Zhuang int irq; 4269854031SHaojian Zhuang }; 4369854031SHaojian Zhuang 4469854031SHaojian Zhuang /* 88PM860x gives us an interrupt when ONKEY is held */ 4569854031SHaojian Zhuang static irqreturn_t pm860x_onkey_handler(int irq, void *data) 4669854031SHaojian Zhuang { 4769854031SHaojian Zhuang struct pm860x_onkey_info *info = data; 4869854031SHaojian Zhuang int ret; 4969854031SHaojian Zhuang 5069854031SHaojian Zhuang ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); 5169854031SHaojian Zhuang ret &= ONKEY_STATUS; 5269854031SHaojian Zhuang input_report_key(info->idev, KEY_POWER, ret); 5369854031SHaojian Zhuang input_sync(info->idev); 5469854031SHaojian Zhuang 5569854031SHaojian Zhuang /* Enable 8-second long onkey detection */ 5669854031SHaojian Zhuang pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN); 5769854031SHaojian Zhuang return IRQ_HANDLED; 5869854031SHaojian Zhuang } 5969854031SHaojian Zhuang 605298cc4cSBill Pemberton static int pm860x_onkey_probe(struct platform_device *pdev) 6169854031SHaojian Zhuang { 6269854031SHaojian Zhuang struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); 6369854031SHaojian Zhuang struct pm860x_onkey_info *info; 6469854031SHaojian Zhuang int irq, ret; 6569854031SHaojian Zhuang 6669854031SHaojian Zhuang irq = platform_get_irq(pdev, 0); 6769854031SHaojian Zhuang if (irq < 0) { 6869854031SHaojian Zhuang dev_err(&pdev->dev, "No IRQ resource!\n"); 6969854031SHaojian Zhuang return -EINVAL; 7069854031SHaojian Zhuang } 7169854031SHaojian Zhuang 72cde51e73SHimangi Saraogi info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info), 73cde51e73SHimangi Saraogi GFP_KERNEL); 7469854031SHaojian Zhuang if (!info) 7569854031SHaojian Zhuang return -ENOMEM; 7669854031SHaojian Zhuang info->chip = chip; 7769854031SHaojian Zhuang info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion; 7869854031SHaojian Zhuang info->dev = &pdev->dev; 79c9f560b3SHaojian Zhuang info->irq = irq; 8069854031SHaojian Zhuang 81cde51e73SHimangi Saraogi info->idev = devm_input_allocate_device(&pdev->dev); 8269854031SHaojian Zhuang if (!info->idev) { 8369854031SHaojian Zhuang dev_err(chip->dev, "Failed to allocate input dev\n"); 84cde51e73SHimangi Saraogi return -ENOMEM; 8569854031SHaojian Zhuang } 8669854031SHaojian Zhuang 8769854031SHaojian Zhuang info->idev->name = "88pm860x_on"; 8869854031SHaojian Zhuang info->idev->phys = "88pm860x_on/input0"; 8969854031SHaojian Zhuang info->idev->id.bustype = BUS_I2C; 9069854031SHaojian Zhuang info->idev->dev.parent = &pdev->dev; 9169854031SHaojian Zhuang info->idev->evbit[0] = BIT_MASK(EV_KEY); 9269854031SHaojian Zhuang info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER); 9369854031SHaojian Zhuang 9469854031SHaojian Zhuang ret = input_register_device(info->idev); 9569854031SHaojian Zhuang if (ret) { 9669854031SHaojian Zhuang dev_err(chip->dev, "Can't register input device: %d\n", ret); 97cde51e73SHimangi Saraogi return ret; 9869854031SHaojian Zhuang } 9969854031SHaojian Zhuang 100cde51e73SHimangi Saraogi ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, 101cde51e73SHimangi Saraogi pm860x_onkey_handler, IRQF_ONESHOT, 102cde51e73SHimangi Saraogi "onkey", info); 10369854031SHaojian Zhuang if (ret < 0) { 10469854031SHaojian Zhuang dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", 10569854031SHaojian Zhuang info->irq, ret); 106cde51e73SHimangi Saraogi return ret; 10769854031SHaojian Zhuang } 10869854031SHaojian Zhuang 10969854031SHaojian Zhuang platform_set_drvdata(pdev, info); 1102853378bSJett.Zhou device_init_wakeup(&pdev->dev, 1); 1112853378bSJett.Zhou 11269854031SHaojian Zhuang return 0; 11369854031SHaojian Zhuang } 11469854031SHaojian Zhuang 1152853378bSJett.Zhou #ifdef CONFIG_PM_SLEEP 1162853378bSJett.Zhou static int pm860x_onkey_suspend(struct device *dev) 1172853378bSJett.Zhou { 1182853378bSJett.Zhou struct platform_device *pdev = to_platform_device(dev); 1192853378bSJett.Zhou struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); 1202853378bSJett.Zhou 1212853378bSJett.Zhou if (device_may_wakeup(dev)) 1222853378bSJett.Zhou chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY; 1232853378bSJett.Zhou return 0; 1242853378bSJett.Zhou } 1252853378bSJett.Zhou static int pm860x_onkey_resume(struct device *dev) 1262853378bSJett.Zhou { 1272853378bSJett.Zhou struct platform_device *pdev = to_platform_device(dev); 1282853378bSJett.Zhou struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); 1292853378bSJett.Zhou 1302853378bSJett.Zhou if (device_may_wakeup(dev)) 1312853378bSJett.Zhou chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY); 1322853378bSJett.Zhou return 0; 1332853378bSJett.Zhou } 1342853378bSJett.Zhou #endif 1352853378bSJett.Zhou 1362853378bSJett.Zhou static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume); 1372853378bSJett.Zhou 13869854031SHaojian Zhuang static struct platform_driver pm860x_onkey_driver = { 13969854031SHaojian Zhuang .driver = { 14069854031SHaojian Zhuang .name = "88pm860x-onkey", 14169854031SHaojian Zhuang .owner = THIS_MODULE, 1422853378bSJett.Zhou .pm = &pm860x_onkey_pm_ops, 14369854031SHaojian Zhuang }, 14469854031SHaojian Zhuang .probe = pm860x_onkey_probe, 14569854031SHaojian Zhuang }; 146840a746bSJJ Ding module_platform_driver(pm860x_onkey_driver); 14769854031SHaojian Zhuang 14869854031SHaojian Zhuang MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver"); 14969854031SHaojian Zhuang MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); 15069854031SHaojian Zhuang MODULE_LICENSE("GPL"); 151