Qiao Zhou | 96c905f | 2012-07-17 15:17:39 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Marvell 88PM80x ONKEY driver |
| 3 | * |
| 4 | * Copyright (C) 2012 Marvell International Ltd. |
| 5 | * Haojian Zhuang <haojian.zhuang@marvell.com> |
| 6 | * Qiao Zhou <zhouqiao@marvell.com> |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General |
| 9 | * Public License. See the file "COPYING" in the main directory of this |
| 10 | * archive for more details. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/input.h> |
| 25 | #include <linux/mfd/88pm80x.h> |
| 26 | #include <linux/regmap.h> |
| 27 | #include <linux/slab.h> |
| 28 | |
| 29 | #define PM800_LONG_ONKEY_EN (1 << 0) |
| 30 | #define PM800_LONG_KEY_DELAY (8) /* 1 .. 16 seconds */ |
| 31 | #define PM800_LONKEY_PRESS_TIME ((PM800_LONG_KEY_DELAY-1) << 4) |
| 32 | #define PM800_LONKEY_PRESS_TIME_MASK (0xF0) |
| 33 | #define PM800_SW_PDOWN (1 << 5) |
| 34 | |
| 35 | struct pm80x_onkey_info { |
| 36 | struct input_dev *idev; |
| 37 | struct pm80x_chip *pm80x; |
| 38 | struct regmap *map; |
| 39 | int irq; |
| 40 | }; |
| 41 | |
| 42 | /* 88PM80x gives us an interrupt when ONKEY is held */ |
| 43 | static irqreturn_t pm80x_onkey_handler(int irq, void *data) |
| 44 | { |
| 45 | struct pm80x_onkey_info *info = data; |
| 46 | int ret = 0; |
| 47 | unsigned int val; |
| 48 | |
| 49 | ret = regmap_read(info->map, PM800_STATUS_1, &val); |
| 50 | if (ret < 0) { |
| 51 | dev_err(info->idev->dev.parent, "failed to read status: %d\n", ret); |
| 52 | return IRQ_NONE; |
| 53 | } |
| 54 | val &= PM800_ONKEY_STS1; |
| 55 | |
| 56 | input_report_key(info->idev, KEY_POWER, val); |
| 57 | input_sync(info->idev); |
| 58 | |
| 59 | return IRQ_HANDLED; |
| 60 | } |
| 61 | |
| 62 | static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_dev_suspend, |
| 63 | pm80x_dev_resume); |
| 64 | |
Bill Pemberton | 5298cc4 | 2012-11-23 21:38:25 -0800 | [diff] [blame] | 65 | static int pm80x_onkey_probe(struct platform_device *pdev) |
Qiao Zhou | 96c905f | 2012-07-17 15:17:39 +0800 | [diff] [blame] | 66 | { |
| 67 | |
| 68 | struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
| 69 | struct pm80x_onkey_info *info; |
| 70 | int err; |
| 71 | |
| 72 | info = kzalloc(sizeof(struct pm80x_onkey_info), GFP_KERNEL); |
| 73 | if (!info) |
| 74 | return -ENOMEM; |
| 75 | |
| 76 | info->pm80x = chip; |
| 77 | |
| 78 | info->irq = platform_get_irq(pdev, 0); |
| 79 | if (info->irq < 0) { |
| 80 | dev_err(&pdev->dev, "No IRQ resource!\n"); |
| 81 | err = -EINVAL; |
| 82 | goto out; |
| 83 | } |
| 84 | |
| 85 | info->map = info->pm80x->regmap; |
| 86 | if (!info->map) { |
| 87 | dev_err(&pdev->dev, "no regmap!\n"); |
| 88 | err = -EINVAL; |
| 89 | goto out; |
| 90 | } |
| 91 | |
| 92 | info->idev = input_allocate_device(); |
| 93 | if (!info->idev) { |
| 94 | dev_err(&pdev->dev, "Failed to allocate input dev\n"); |
| 95 | err = -ENOMEM; |
| 96 | goto out; |
| 97 | } |
| 98 | |
| 99 | info->idev->name = "88pm80x_on"; |
| 100 | info->idev->phys = "88pm80x_on/input0"; |
| 101 | info->idev->id.bustype = BUS_I2C; |
| 102 | info->idev->dev.parent = &pdev->dev; |
| 103 | info->idev->evbit[0] = BIT_MASK(EV_KEY); |
| 104 | __set_bit(KEY_POWER, info->idev->keybit); |
| 105 | |
| 106 | err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler, |
| 107 | IRQF_ONESHOT, "onkey", info); |
| 108 | if (err < 0) { |
| 109 | dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n", |
| 110 | info->irq, err); |
| 111 | goto out_reg; |
| 112 | } |
| 113 | |
| 114 | err = input_register_device(info->idev); |
| 115 | if (err) { |
| 116 | dev_err(&pdev->dev, "Can't register input device: %d\n", err); |
| 117 | goto out_irq; |
| 118 | } |
| 119 | |
| 120 | platform_set_drvdata(pdev, info); |
| 121 | |
| 122 | /* Enable long onkey detection */ |
| 123 | regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN, |
| 124 | PM800_LONG_ONKEY_EN); |
| 125 | /* Set 8-second interval */ |
| 126 | regmap_update_bits(info->map, PM800_RTC_MISC3, |
| 127 | PM800_LONKEY_PRESS_TIME_MASK, |
| 128 | PM800_LONKEY_PRESS_TIME); |
| 129 | |
| 130 | device_init_wakeup(&pdev->dev, 1); |
| 131 | return 0; |
| 132 | |
| 133 | out_irq: |
| 134 | pm80x_free_irq(info->pm80x, info->irq, info); |
| 135 | out_reg: |
| 136 | input_free_device(info->idev); |
| 137 | out: |
| 138 | kfree(info); |
| 139 | return err; |
| 140 | } |
| 141 | |
Bill Pemberton | e2619cf | 2012-11-23 21:50:47 -0800 | [diff] [blame] | 142 | static int pm80x_onkey_remove(struct platform_device *pdev) |
Qiao Zhou | 96c905f | 2012-07-17 15:17:39 +0800 | [diff] [blame] | 143 | { |
| 144 | struct pm80x_onkey_info *info = platform_get_drvdata(pdev); |
| 145 | |
| 146 | device_init_wakeup(&pdev->dev, 0); |
| 147 | pm80x_free_irq(info->pm80x, info->irq, info); |
| 148 | input_unregister_device(info->idev); |
| 149 | kfree(info); |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | static struct platform_driver pm80x_onkey_driver = { |
| 154 | .driver = { |
| 155 | .name = "88pm80x-onkey", |
Qiao Zhou | 96c905f | 2012-07-17 15:17:39 +0800 | [diff] [blame] | 156 | .pm = &pm80x_onkey_pm_ops, |
| 157 | }, |
| 158 | .probe = pm80x_onkey_probe, |
Bill Pemberton | 1cb0aa8 | 2012-11-23 21:27:39 -0800 | [diff] [blame] | 159 | .remove = pm80x_onkey_remove, |
Qiao Zhou | 96c905f | 2012-07-17 15:17:39 +0800 | [diff] [blame] | 160 | }; |
| 161 | |
| 162 | module_platform_driver(pm80x_onkey_driver); |
| 163 | |
| 164 | MODULE_LICENSE("GPL"); |
| 165 | MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver"); |
| 166 | MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>"); |
| 167 | MODULE_ALIAS("platform:88pm80x-onkey"); |