diff options
Diffstat (limited to 'drivers/input/keyboard/mxc_pwrkey.c')
| -rw-r--r-- | drivers/input/keyboard/mxc_pwrkey.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/drivers/input/keyboard/mxc_pwrkey.c b/drivers/input/keyboard/mxc_pwrkey.c new file mode 100644 index 000000000000..7e8ae02c8fee --- /dev/null +++ b/drivers/input/keyboard/mxc_pwrkey.c @@ -0,0 +1,156 @@ +/* + * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/init.h> +#include <asm/io.h> +#include <asm/uaccess.h> +#include <linux/kd.h> +#include <linux/fs.h> +#include <linux/ioctl.h> +#include <linux/input.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/powerkey.h> + +struct mxc_pwrkey_priv { + + struct input_dev *input; + int value; + int (*get_status) (int); +}; + +static struct mxc_pwrkey_priv *mxc_pwrkey; + +static void pwrkey_event_handler(void *param) +{ + int pressed; + + pressed = mxc_pwrkey->get_status((int)param); + + if (pressed) { + input_report_key( + mxc_pwrkey->input, mxc_pwrkey->value, 1); + pr_info("%s_Keydown\n", __func__); + } else { + input_report_key( + mxc_pwrkey->input, mxc_pwrkey->value, 0); + pr_info("%s_Keyup\n", __func__); + } +} + +static int mxcpwrkey_probe(struct platform_device *pdev) +{ + int retval; + struct input_dev *input; + struct power_key_platform_data *pdata = pdev->dev.platform_data; + + if (mxc_pwrkey) { + dev_warn(&pdev->dev, "two power key??\n"); + return -EBUSY; + } + + if (!pdata || !pdata->get_key_status) { + dev_err(&pdev->dev, "can not get platform data\n"); + return -EINVAL; + } + + mxc_pwrkey = kmalloc(sizeof(struct mxc_pwrkey_priv), GFP_KERNEL); + if (!mxc_pwrkey) { + dev_err(&pdev->dev, "can not allocate private data"); + return -ENOMEM; + } + + input = input_allocate_device(); + if (!input) { + dev_err(&pdev->dev, "no memory for input device\n"); + retval = -ENOMEM; + goto err1; + } + + input->name = "mxc_power_key"; + input->phys = "mxcpwrkey/input0"; + input->id.bustype = BUS_HOST; + input->evbit[0] = BIT_MASK(EV_KEY); + + mxc_pwrkey->value = pdata->key_value; + mxc_pwrkey->get_status = pdata->get_key_status; + mxc_pwrkey->input = input; + pdata->register_pwrkey(pwrkey_event_handler); + + input_set_capability(input, EV_KEY, mxc_pwrkey->value); + + retval = input_register_device(input); + if (retval < 0) { + dev_err(&pdev->dev, "failed to register input device\n"); + goto err2; + } + + printk(KERN_INFO "PMIC powerkey probe\n"); + + return 0; + +err2: + input_free_device(input); +err1: + kfree(mxc_pwrkey); + mxc_pwrkey = NULL; + + return retval; +} + +static int mxcpwrkey_remove(struct platform_device *pdev) +{ + input_unregister_device(mxc_pwrkey->input); + input_free_device(mxc_pwrkey->input); + kfree(mxc_pwrkey); + mxc_pwrkey = NULL; + + return 0; +} + +static struct platform_driver mxcpwrkey_driver = { + .driver = { + .name = "mxcpwrkey", + }, + .probe = mxcpwrkey_probe, + .remove = mxcpwrkey_remove, +}; + +static int __init mxcpwrkey_init(void) +{ + return platform_driver_register(&mxcpwrkey_driver); +} + +static void __exit mxcpwrkey_exit(void) +{ + platform_driver_unregister(&mxcpwrkey_driver); +} + +module_init(mxcpwrkey_init); +module_exit(mxcpwrkey_exit); + + +MODULE_AUTHOR("Freescale Semiconductor"); +MODULE_DESCRIPTION("MXC board power key Driver"); +MODULE_LICENSE("GPL"); |