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Input: add support for PowerOn button on the AB8500 MFD
Add the PowerOn (PonKey) button support to detect power on/off events. Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Sundar R Iyer <sundar.iyer@stericsson.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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4 changed files with 188 additions and 0 deletions
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@ -22,6 +22,16 @@ config INPUT_88PM860X_ONKEY
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To compile this driver as a module, choose M here: the module
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will be called 88pm860x_onkey.
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config INPUT_AB8500_PONKEY
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tristate "AB8500 Pon (PowerOn) Key"
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depends on AB8500_CORE
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help
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Say Y here to use the PowerOn Key for ST-Ericsson's AB8500
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Mix-Sig PMIC.
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To compile this driver as a module, choose M here: the module
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will be called ab8500-ponkey.
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config INPUT_AD714X
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tristate "Analog Devices AD714x Capacitance Touch Sensor"
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help
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@ -5,6 +5,7 @@
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# Each configuration option enables a list of files.
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obj-$(CONFIG_INPUT_88PM860X_ONKEY) += 88pm860x_onkey.o
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obj-$(CONFIG_INPUT_AB8500_PONKEY) += ab8500-ponkey.o
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obj-$(CONFIG_INPUT_AD714X) += ad714x.o
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obj-$(CONFIG_INPUT_AD714X_I2C) += ad714x-i2c.o
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obj-$(CONFIG_INPUT_AD714X_SPI) += ad714x-spi.o
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157
drivers/input/misc/ab8500-ponkey.c
Normal file
157
drivers/input/misc/ab8500-ponkey.c
Normal file
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@ -0,0 +1,157 @@
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/*
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* Copyright (C) ST-Ericsson SA 2010
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*
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* License Terms: GNU General Public License v2
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* Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
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*
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* AB8500 Power-On Key handler
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/mfd/ab8500.h>
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#include <linux/slab.h>
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/**
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* struct ab8500_ponkey - ab8500 ponkey information
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* @input_dev: pointer to input device
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* @ab8500: ab8500 parent
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* @irq_dbf: irq number for falling transition
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* @irq_dbr: irq number for rising transition
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*/
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struct ab8500_ponkey {
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struct input_dev *idev;
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struct ab8500 *ab8500;
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int irq_dbf;
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int irq_dbr;
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};
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/* AB8500 gives us an interrupt when ONKEY is held */
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static irqreturn_t ab8500_ponkey_handler(int irq, void *data)
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{
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struct ab8500_ponkey *ponkey = data;
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if (irq == ponkey->irq_dbf)
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input_report_key(ponkey->idev, KEY_POWER, true);
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else if (irq == ponkey->irq_dbr)
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input_report_key(ponkey->idev, KEY_POWER, false);
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input_sync(ponkey->idev);
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return IRQ_HANDLED;
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}
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static int __devinit ab8500_ponkey_probe(struct platform_device *pdev)
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{
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struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
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struct ab8500_ponkey *ponkey;
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struct input_dev *input;
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int irq_dbf, irq_dbr;
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int error;
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irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF");
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if (irq_dbf < 0) {
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dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
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return irq_dbf;
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}
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irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
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if (irq_dbr < 0) {
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dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
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return irq_dbr;
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}
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ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
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input = input_allocate_device();
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if (!ponkey || !input) {
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error = -ENOMEM;
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goto err_free_mem;
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}
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ponkey->idev = input;
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ponkey->ab8500 = ab8500;
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ponkey->irq_dbf = irq_dbf;
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ponkey->irq_dbr = irq_dbr;
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input->name = "AB8500 POn(PowerOn) Key";
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input->dev.parent = &pdev->dev;
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input_set_capability(input, EV_KEY, KEY_POWER);
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error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler,
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0, "ab8500-ponkey-dbf", ponkey);
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if (error < 0) {
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dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
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ponkey->irq_dbf, error);
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goto err_free_mem;
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}
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error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler,
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0, "ab8500-ponkey-dbr", ponkey);
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if (error < 0) {
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dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
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ponkey->irq_dbr, error);
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goto err_free_dbf_irq;
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}
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error = input_register_device(ponkey->idev);
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if (error) {
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dev_err(ab8500->dev, "Can't register input device: %d\n", error);
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goto err_free_dbr_irq;
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}
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platform_set_drvdata(pdev, ponkey);
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return 0;
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err_free_dbr_irq:
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free_irq(ponkey->irq_dbf, ponkey);
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err_free_dbf_irq:
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free_irq(ponkey->irq_dbf, ponkey);
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err_free_mem:
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input_free_device(input);
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kfree(ponkey);
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return error;
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}
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static int __devexit ab8500_ponkey_remove(struct platform_device *pdev)
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{
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struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);
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free_irq(ponkey->irq_dbf, ponkey);
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free_irq(ponkey->irq_dbr, ponkey);
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input_unregister_device(ponkey->idev);
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kfree(ponkey);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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static struct platform_driver ab8500_ponkey_driver = {
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.driver = {
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.name = "ab8500-poweron-key",
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.owner = THIS_MODULE,
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},
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.probe = ab8500_ponkey_probe,
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.remove = __devexit_p(ab8500_ponkey_remove),
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};
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static int __init ab8500_ponkey_init(void)
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{
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return platform_driver_register(&ab8500_ponkey_driver);
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}
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module_init(ab8500_ponkey_init);
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static void __exit ab8500_ponkey_exit(void)
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{
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platform_driver_unregister(&ab8500_ponkey_driver);
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}
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module_exit(ab8500_ponkey_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
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MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");
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@ -338,6 +338,21 @@ static struct resource ab8500_rtc_resources[] = {
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},
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};
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static struct resource ab8500_poweronkey_db_resources[] = {
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{
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.name = "ONKEY_DBF",
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.start = AB8500_INT_PON_KEY1DB_F,
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.end = AB8500_INT_PON_KEY1DB_F,
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.flags = IORESOURCE_IRQ,
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},
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{
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.name = "ONKEY_DBR",
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.start = AB8500_INT_PON_KEY1DB_R,
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.end = AB8500_INT_PON_KEY1DB_R,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct mfd_cell ab8500_devs[] = {
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{
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.name = "ab8500-gpadc",
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@ -354,6 +369,11 @@ static struct mfd_cell ab8500_devs[] = {
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{ .name = "ab8500-usb", },
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{ .name = "ab8500-pwm", },
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{ .name = "ab8500-regulator", },
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{
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.name = "ab8500-poweron-key",
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.num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources),
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.resources = ab8500_poweronkey_db_resources,
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},
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};
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int __devinit ab8500_init(struct ab8500 *ab8500)
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