diff options
Diffstat (limited to 'drivers/input/keyboard/mcs_touchkey.c')
| -rw-r--r-- | drivers/input/keyboard/mcs_touchkey.c | 57 |
1 files changed, 56 insertions, 1 deletions
diff --git a/drivers/input/keyboard/mcs_touchkey.c b/drivers/input/keyboard/mcs_touchkey.c index 63b849d7e90b..af1aab324a4c 100644 --- a/drivers/input/keyboard/mcs_touchkey.c +++ b/drivers/input/keyboard/mcs_touchkey.c @@ -1,5 +1,5 @@ /* - * mcs_touchkey.c - Touchkey driver for MELFAS MCS5000/5080 controller + * Touchkey driver for MELFAS MCS5000/5080 controller * * Copyright (C) 2010 Samsung Electronics Co.Ltd * Author: HeungJun Kim <riverful.kim@samsung.com> @@ -19,6 +19,7 @@ #include <linux/input.h> #include <linux/irq.h> #include <linux/slab.h> +#include <linux/pm.h> /* MCS5000 Touchkey */ #define MCS5000_TOUCHKEY_STATUS 0x04 @@ -45,6 +46,8 @@ struct mcs_touchkey_chip { }; struct mcs_touchkey_data { + void (*poweron)(bool); + struct i2c_client *client; struct input_dev *input_dev; struct mcs_touchkey_chip chip; @@ -169,6 +172,11 @@ static int __devinit mcs_touchkey_probe(struct i2c_client *client, if (pdata->cfg_pin) pdata->cfg_pin(); + if (pdata->poweron) { + data->poweron = pdata->poweron; + data->poweron(true); + } + error = request_threaded_irq(client->irq, NULL, mcs_touchkey_interrupt, IRQF_TRIGGER_FALLING, client->dev.driver->name, data); if (error) { @@ -196,12 +204,57 @@ static int __devexit mcs_touchkey_remove(struct i2c_client *client) struct mcs_touchkey_data *data = i2c_get_clientdata(client); free_irq(client->irq, data); + if (data->poweron) + data->poweron(false); input_unregister_device(data->input_dev); kfree(data); return 0; } +static void mcs_touchkey_shutdown(struct i2c_client *client) +{ + struct mcs_touchkey_data *data = i2c_get_clientdata(client); + + if (data->poweron) + data->poweron(false); +} + +#ifdef CONFIG_PM_SLEEP +static int mcs_touchkey_suspend(struct device *dev) +{ + struct mcs_touchkey_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + + /* Disable the work */ + disable_irq(client->irq); + + /* Finally turn off the power */ + if (data->poweron) + data->poweron(false); + + return 0; +} + +static int mcs_touchkey_resume(struct device *dev) +{ + struct mcs_touchkey_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + + /* Enable the device first */ + if (data->poweron) + data->poweron(true); + + /* Enable irq again */ + enable_irq(client->irq); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(mcs_touchkey_pm_ops, + mcs_touchkey_suspend, mcs_touchkey_resume); + static const struct i2c_device_id mcs_touchkey_id[] = { { "mcs5000_touchkey", MCS5000_TOUCHKEY }, { "mcs5080_touchkey", MCS5080_TOUCHKEY }, @@ -213,9 +266,11 @@ static struct i2c_driver mcs_touchkey_driver = { .driver = { .name = "mcs_touchkey", .owner = THIS_MODULE, + .pm = &mcs_touchkey_pm_ops, }, .probe = mcs_touchkey_probe, .remove = __devexit_p(mcs_touchkey_remove), + .shutdown = mcs_touchkey_shutdown, .id_table = mcs_touchkey_id, }; |