linux/drivers/input/misc/ab8500-ponkey.c
Linus Torvalds 21ebd6c68b Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (59 commits)
  rtc: max8925: Add function to work as wakeup source
  mfd: Add pm ops to max8925
  mfd: Convert aat2870 to dev_pm_ops
  mfd: Still check other interrupts if we get a wm831x touchscreen IRQ
  mfd: Introduce missing kfree in 88pm860x probe routine
  mfd: Add S5M series configuration
  mfd: Add s5m series irq driver
  mfd: Add S5M core driver
  mfd: Improve mc13xxx dt binding document
  mfd: Fix stmpe section mismatch
  mfd: Fix stmpe build warning
  mfd: Fix STMPE I2c build failure
  mfd: Constify aat2870-core i2c_device_id table
  gpio: Add support for stmpe variant 801
  mfd: Add support for stmpe variant 801
  mfd: Add support for stmpe variant 610
  mfd: Add support for STMPE SPI interface
  mfd: Separate out STMPE controller and interface specific code
  misc: Remove max8997-muic sysfs attributes
  mfd: Remove unused wm831x_irq_data_to_mask_reg()
  ...

Fix up trivial conflict in drivers/leds/Kconfig due to addition of
LEDS_MAX8997 and LEDS_TCA6507 next to each other.
2012-01-13 20:43:32 -08:00

147 lines
3.6 KiB
C

/*
* Copyright (C) ST-Ericsson SA 2010
*
* License Terms: GNU General Public License v2
* Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
*
* AB8500 Power-On Key handler
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/slab.h>
/**
* struct ab8500_ponkey - ab8500 ponkey information
* @input_dev: pointer to input device
* @ab8500: ab8500 parent
* @irq_dbf: irq number for falling transition
* @irq_dbr: irq number for rising transition
*/
struct ab8500_ponkey {
struct input_dev *idev;
struct ab8500 *ab8500;
int irq_dbf;
int irq_dbr;
};
/* AB8500 gives us an interrupt when ONKEY is held */
static irqreturn_t ab8500_ponkey_handler(int irq, void *data)
{
struct ab8500_ponkey *ponkey = data;
if (irq == ponkey->irq_dbf)
input_report_key(ponkey->idev, KEY_POWER, true);
else if (irq == ponkey->irq_dbr)
input_report_key(ponkey->idev, KEY_POWER, false);
input_sync(ponkey->idev);
return IRQ_HANDLED;
}
static int __devinit ab8500_ponkey_probe(struct platform_device *pdev)
{
struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
struct ab8500_ponkey *ponkey;
struct input_dev *input;
int irq_dbf, irq_dbr;
int error;
irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF");
if (irq_dbf < 0) {
dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
return irq_dbf;
}
irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
if (irq_dbr < 0) {
dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
return irq_dbr;
}
ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
input = input_allocate_device();
if (!ponkey || !input) {
error = -ENOMEM;
goto err_free_mem;
}
ponkey->idev = input;
ponkey->ab8500 = ab8500;
ponkey->irq_dbf = irq_dbf;
ponkey->irq_dbr = irq_dbr;
input->name = "AB8500 POn(PowerOn) Key";
input->dev.parent = &pdev->dev;
input_set_capability(input, EV_KEY, KEY_POWER);
error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler,
0, "ab8500-ponkey-dbf", ponkey);
if (error < 0) {
dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
ponkey->irq_dbf, error);
goto err_free_mem;
}
error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler,
0, "ab8500-ponkey-dbr", ponkey);
if (error < 0) {
dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
ponkey->irq_dbr, error);
goto err_free_dbf_irq;
}
error = input_register_device(ponkey->idev);
if (error) {
dev_err(ab8500->dev, "Can't register input device: %d\n", error);
goto err_free_dbr_irq;
}
platform_set_drvdata(pdev, ponkey);
return 0;
err_free_dbr_irq:
free_irq(ponkey->irq_dbr, ponkey);
err_free_dbf_irq:
free_irq(ponkey->irq_dbf, ponkey);
err_free_mem:
input_free_device(input);
kfree(ponkey);
return error;
}
static int __devexit ab8500_ponkey_remove(struct platform_device *pdev)
{
struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);
free_irq(ponkey->irq_dbf, ponkey);
free_irq(ponkey->irq_dbr, ponkey);
input_unregister_device(ponkey->idev);
kfree(ponkey);
platform_set_drvdata(pdev, NULL);
return 0;
}
static struct platform_driver ab8500_ponkey_driver = {
.driver = {
.name = "ab8500-poweron-key",
.owner = THIS_MODULE,
},
.probe = ab8500_ponkey_probe,
.remove = __devexit_p(ab8500_ponkey_remove),
};
module_platform_driver(ab8500_ponkey_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");