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>

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>
Sundar R Iyer · Dmitry Torokhov
1 parent 144c0f8833
Showing 4 changed files with 188 additions and 0 deletions Side-by-side Diff
drivers/input/misc/Kconfig
drivers/input/misc/Makefile
drivers/input/misc/ab8500-ponkey.c
drivers/mfd/ab8500-core.c
@@ -22,6 +22,16 @@
 	  To compile this driver as a module, choose M here: the module
 	  will be called 88pm860x_onkey.
  
+config INPUT_AB8500_PONKEY
+	tristate "AB8500 Pon (PowerOn) Key"
+	depends on AB8500_CORE
+	help
+	  Say Y here to use the PowerOn Key for ST-Ericsson's AB8500
+	  Mix-Sig PMIC.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called ab8500-ponkey.
+
 config INPUT_AD714X
 	tristate "Analog Devices AD714x Capacitance Touch Sensor"
 	help
@@ -5,6 +5,7 @@
 # Each configuration option enables a list of files.
  
 obj-$(CONFIG_INPUT_88PM860X_ONKEY)	+= 88pm860x_onkey.o
+obj-$(CONFIG_INPUT_AB8500_PONKEY)	+= ab8500-ponkey.o
 obj-$(CONFIG_INPUT_AD714X)		+= ad714x.o
 obj-$(CONFIG_INPUT_AD714X_I2C)		+= ad714x-i2c.o
 obj-$(CONFIG_INPUT_AD714X_SPI)		+= ad714x-spi.o
+/*
+ * 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/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_dbf, 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),
+};
+
+static int __init ab8500_ponkey_init(void)
+{
+	return platform_driver_register(&ab8500_ponkey_driver);
+}
+module_init(ab8500_ponkey_init);
+
+static void __exit ab8500_ponkey_exit(void)
+{
+	platform_driver_unregister(&ab8500_ponkey_driver);
+}
+module_exit(ab8500_ponkey_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
+MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");
@@ -338,6 +338,21 @@
 	},
 };
  
+static struct resource ab8500_poweronkey_db_resources[] = {
+	{
+		.name	= "ONKEY_DBF",
+		.start	= AB8500_INT_PON_KEY1DB_F,
+		.end	= AB8500_INT_PON_KEY1DB_F,
+		.flags	= IORESOURCE_IRQ,
+	},
+	{
+		.name	= "ONKEY_DBR",
+		.start	= AB8500_INT_PON_KEY1DB_R,
+		.end	= AB8500_INT_PON_KEY1DB_R,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
 static struct mfd_cell ab8500_devs[] = {
 	{
 		.name = "ab8500-gpadc",
@@ -354,6 +369,11 @@
 	{ .name = "ab8500-usb", },
 	{ .name = "ab8500-pwm", },
 	{ .name = "ab8500-regulator", },
+	{
+		.name = "ab8500-poweron-key",
+		.num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources),
+		.resources = ab8500_poweronkey_db_resources,
+	},
 };
  
 int __devinit ab8500_init(struct ab8500 *ab8500)
...	...	@@ -22,6 +22,16 @@
22	22	To compile this driver as a module, choose M here: the module
23	23	will be called 88pm860x_onkey.
24	24
	25	+config INPUT_AB8500_PONKEY
	26	+ tristate "AB8500 Pon (PowerOn) Key"
	27	+ depends on AB8500_CORE
	28	+ help
	29	+ Say Y here to use the PowerOn Key for ST-Ericsson's AB8500
	30	+ Mix-Sig PMIC.
	31	+
	32	+ To compile this driver as a module, choose M here: the module
	33	+ will be called ab8500-ponkey.
	34	+
25	35	config INPUT_AD714X
26	36	tristate "Analog Devices AD714x Capacitance Touch Sensor"
27	37	help
...	...	@@ -5,6 +5,7 @@
5	5	# Each configuration option enables a list of files.
6	6
7	7	obj-$(CONFIG_INPUT_88PM860X_ONKEY) += 88pm860x_onkey.o
	8	+obj-$(CONFIG_INPUT_AB8500_PONKEY) += ab8500-ponkey.o
8	9	obj-$(CONFIG_INPUT_AD714X) += ad714x.o
9	10	obj-$(CONFIG_INPUT_AD714X_I2C) += ad714x-i2c.o
10	11	obj-$(CONFIG_INPUT_AD714X_SPI) += ad714x-spi.o
	1	+/*
	2	+ * Copyright (C) ST-Ericsson SA 2010
	3	+ *
	4	+ * License Terms: GNU General Public License v2
	5	+ * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
	6	+ *
	7	+ * AB8500 Power-On Key handler
	8	+ */
	9	+
	10	+#include <linux/kernel.h>
	11	+#include <linux/module.h>
	12	+#include <linux/platform_device.h>
	13	+#include <linux/input.h>
	14	+#include <linux/interrupt.h>
	15	+#include <linux/mfd/ab8500.h>
	16	+#include <linux/slab.h>
	17	+
	18	+/**
	19	+ * struct ab8500_ponkey - ab8500 ponkey information
	20	+ * @input_dev: pointer to input device
	21	+ * @ab8500: ab8500 parent
	22	+ * @irq_dbf: irq number for falling transition
	23	+ * @irq_dbr: irq number for rising transition
	24	+ */
	25	+struct ab8500_ponkey {
	26	+ struct input_dev *idev;
	27	+ struct ab8500 *ab8500;
	28	+ int irq_dbf;
	29	+ int irq_dbr;
	30	+};
	31	+
	32	+/* AB8500 gives us an interrupt when ONKEY is held */
	33	+static irqreturn_t ab8500_ponkey_handler(int irq, void *data)
	34	+{
	35	+ struct ab8500_ponkey *ponkey = data;
	36	+
	37	+ if (irq == ponkey->irq_dbf)
	38	+ input_report_key(ponkey->idev, KEY_POWER, true);
	39	+ else if (irq == ponkey->irq_dbr)
	40	+ input_report_key(ponkey->idev, KEY_POWER, false);
	41	+
	42	+ input_sync(ponkey->idev);
	43	+
	44	+ return IRQ_HANDLED;
	45	+}
	46	+
	47	+static int __devinit ab8500_ponkey_probe(struct platform_device *pdev)
	48	+{
	49	+ struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
	50	+ struct ab8500_ponkey *ponkey;
	51	+ struct input_dev *input;
	52	+ int irq_dbf, irq_dbr;
	53	+ int error;
	54	+
	55	+ irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF");
	56	+ if (irq_dbf < 0) {
	57	+ dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
	58	+ return irq_dbf;
	59	+ }
	60	+
	61	+ irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
	62	+ if (irq_dbr < 0) {
	63	+ dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
	64	+ return irq_dbr;
	65	+ }
	66	+
	67	+ ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
	68	+ input = input_allocate_device();
	69	+ if (!ponkey \|\| !input) {
	70	+ error = -ENOMEM;
	71	+ goto err_free_mem;
	72	+ }
	73	+
	74	+ ponkey->idev = input;
	75	+ ponkey->ab8500 = ab8500;
	76	+ ponkey->irq_dbf = irq_dbf;
	77	+ ponkey->irq_dbr = irq_dbr;
	78	+
	79	+ input->name = "AB8500 POn(PowerOn) Key";
	80	+ input->dev.parent = &pdev->dev;
	81	+
	82	+ input_set_capability(input, EV_KEY, KEY_POWER);
	83	+
	84	+ error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler,
	85	+ 0, "ab8500-ponkey-dbf", ponkey);
	86	+ if (error < 0) {
	87	+ dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
	88	+ ponkey->irq_dbf, error);
	89	+ goto err_free_mem;
	90	+ }
	91	+
	92	+ error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler,
	93	+ 0, "ab8500-ponkey-dbr", ponkey);
	94	+ if (error < 0) {
	95	+ dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
	96	+ ponkey->irq_dbr, error);
	97	+ goto err_free_dbf_irq;
	98	+ }
	99	+
	100	+ error = input_register_device(ponkey->idev);
	101	+ if (error) {
	102	+ dev_err(ab8500->dev, "Can't register input device: %d\n", error);
	103	+ goto err_free_dbr_irq;
	104	+ }
	105	+
	106	+ platform_set_drvdata(pdev, ponkey);
	107	+ return 0;
	108	+
	109	+err_free_dbr_irq:
	110	+ free_irq(ponkey->irq_dbf, ponkey);
	111	+err_free_dbf_irq:
	112	+ free_irq(ponkey->irq_dbf, ponkey);
	113	+err_free_mem:
	114	+ input_free_device(input);
	115	+ kfree(ponkey);
	116	+
	117	+ return error;
	118	+}
	119	+
	120	+static int __devexit ab8500_ponkey_remove(struct platform_device *pdev)
	121	+{
	122	+ struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);
	123	+
	124	+ free_irq(ponkey->irq_dbf, ponkey);
	125	+ free_irq(ponkey->irq_dbr, ponkey);
	126	+ input_unregister_device(ponkey->idev);
	127	+ kfree(ponkey);
	128	+
	129	+ platform_set_drvdata(pdev, NULL);
	130	+
	131	+ return 0;
	132	+}
	133	+
	134	+static struct platform_driver ab8500_ponkey_driver = {
	135	+ .driver = {
	136	+ .name = "ab8500-poweron-key",
	137	+ .owner = THIS_MODULE,
	138	+ },
	139	+ .probe = ab8500_ponkey_probe,
	140	+ .remove = __devexit_p(ab8500_ponkey_remove),
	141	+};
	142	+
	143	+static int __init ab8500_ponkey_init(void)
	144	+{
	145	+ return platform_driver_register(&ab8500_ponkey_driver);
	146	+}
	147	+module_init(ab8500_ponkey_init);
	148	+
	149	+static void __exit ab8500_ponkey_exit(void)
	150	+{
	151	+ platform_driver_unregister(&ab8500_ponkey_driver);
	152	+}
	153	+module_exit(ab8500_ponkey_exit);
	154	+
	155	+MODULE_LICENSE("GPL v2");
	156	+MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
	157	+MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");
...	...	@@ -338,6 +338,21 @@
338	338	},
339	339	};
340	340
	341	+static struct resource ab8500_poweronkey_db_resources[] = {
	342	+ {
	343	+ .name = "ONKEY_DBF",
	344	+ .start = AB8500_INT_PON_KEY1DB_F,
	345	+ .end = AB8500_INT_PON_KEY1DB_F,
	346	+ .flags = IORESOURCE_IRQ,
	347	+ },
	348	+ {
	349	+ .name = "ONKEY_DBR",
	350	+ .start = AB8500_INT_PON_KEY1DB_R,
	351	+ .end = AB8500_INT_PON_KEY1DB_R,
	352	+ .flags = IORESOURCE_IRQ,
	353	+ },
	354	+};
	355	+
341	356	static struct mfd_cell ab8500_devs[] = {
342	357	{
343	358	.name = "ab8500-gpadc",
...	...	@@ -354,6 +369,11 @@
354	369	{ .name = "ab8500-usb", },
355	370	{ .name = "ab8500-pwm", },
356	371	{ .name = "ab8500-regulator", },
	372	+ {
	373	+ .name = "ab8500-poweron-key",
	374	+ .num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources),
	375	+ .resources = ab8500_poweronkey_db_resources,
	376	+ },
357	377	};
358	378
359	379	int __devinit ab8500_init(struct ab8500 *ab8500)