Input: add Retu power button driver.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Input: add Retu power button driver.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Aaro Koskinen · Dmitry Torokhov
1 parent 71a129fb61
Showing 3 changed files with 110 additions and 0 deletions Side-by-side Diff
drivers/input/misc/Kconfig
drivers/input/misc/Makefile
drivers/input/misc/retu-pwrbutton.c
@@ -364,6 +364,16 @@
 	  To compile this driver as a module, choose M here: the module will be
 	  called cm109.
  
+config INPUT_RETU_PWRBUTTON
+	tristate "Retu Power button Driver"
+	depends on MFD_RETU
+	help
+	  Say Y here if you want to enable power key reporting via the
+	  Retu chips found in Nokia Internet Tablets (770, N800, N810).
+
+	  To compile this driver as a module, choose M here. The module will
+	  be called retu-pwrbutton.
+
 config INPUT_TWL4030_PWRBUTTON
 	tristate "TWL4030 Power button Driver"
 	depends on TWL4030_CORE
@@ -46,6 +46,7 @@
 obj-$(CONFIG_INPUT_POWERMATE)		+= powermate.o
 obj-$(CONFIG_INPUT_PWM_BEEPER)		+= pwm-beeper.o
 obj-$(CONFIG_INPUT_RB532_BUTTON)	+= rb532_button.o
+obj-$(CONFIG_INPUT_RETU_PWRBUTTON)	+= retu-pwrbutton.o
 obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER)	+= rotary_encoder.o
 obj-$(CONFIG_INPUT_SGI_BTNS)		+= sgi_btns.o
 obj-$(CONFIG_INPUT_SPARCSPKR)		+= sparcspkr.o
+/*
+ * Retu power button driver.
+ *
+ * Copyright (C) 2004-2010 Nokia Corporation
+ *
+ * Original code written by Ari Saastamoinen, Juha Yrjölä and Felipe Balbi.
+ * Rewritten by Aaro Koskinen.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * 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.
+ */
+
+#include <linux/irq.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mfd/retu.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#define RETU_STATUS_PWRONX (1 << 5)
+
+static irqreturn_t retu_pwrbutton_irq(int irq, void *_pwr)
+{
+	struct input_dev *idev = _pwr;
+	struct retu_dev *rdev = input_get_drvdata(idev);
+	bool state;
+
+	state = !(retu_read(rdev, RETU_REG_STATUS) & RETU_STATUS_PWRONX);
+	input_report_key(idev, KEY_POWER, state);
+	input_sync(idev);
+
+	return IRQ_HANDLED;
+}
+
+static int __devinit retu_pwrbutton_probe(struct platform_device *pdev)
+{
+	struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent);
+	struct input_dev *idev;
+	int irq;
+	int error;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	idev = devm_input_allocate_device(&pdev->dev);
+	if (!idev)
+		return -ENOMEM;
+
+	idev->name = "retu-pwrbutton";
+	idev->dev.parent = &pdev->dev;
+
+	input_set_capability(idev, EV_KEY, KEY_POWER);
+	input_set_drvdata(idev, rdev);
+
+	error = devm_request_threaded_irq(&pdev->dev, irq,
+					  NULL, retu_pwrbutton_irq, 0,
+					  "retu-pwrbutton", idev);
+	if (error)
+		return error;
+
+	error = input_register_device(idev);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+static int __devexit retu_pwrbutton_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static struct platform_driver retu_pwrbutton_driver = {
+	.probe		= retu_pwrbutton_probe,
+	.remove		= __devexit_p(retu_pwrbutton_remove),
+	.driver		= {
+		.name	= "retu-pwrbutton",
+		.owner	= THIS_MODULE,
+	},
+};
+module_platform_driver(retu_pwrbutton_driver);
+
+MODULE_ALIAS("platform:retu-pwrbutton");
+MODULE_DESCRIPTION("Retu Power Button");
+MODULE_AUTHOR("Ari Saastamoinen");
+MODULE_AUTHOR("Felipe Balbi");
+MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
+MODULE_LICENSE("GPL");
...	...	@@ -364,6 +364,16 @@
364	364	To compile this driver as a module, choose M here: the module will be
365	365	called cm109.
366	366
	367	+config INPUT_RETU_PWRBUTTON
	368	+ tristate "Retu Power button Driver"
	369	+ depends on MFD_RETU
	370	+ help
	371	+ Say Y here if you want to enable power key reporting via the
	372	+ Retu chips found in Nokia Internet Tablets (770, N800, N810).
	373	+
	374	+ To compile this driver as a module, choose M here. The module will
	375	+ be called retu-pwrbutton.
	376	+
367	377	config INPUT_TWL4030_PWRBUTTON
368	378	tristate "TWL4030 Power button Driver"
369	379	depends on TWL4030_CORE
...	...	@@ -46,6 +46,7 @@
46	46	obj-$(CONFIG_INPUT_POWERMATE) += powermate.o
47	47	obj-$(CONFIG_INPUT_PWM_BEEPER) += pwm-beeper.o
48	48	obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o
	49	+obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o
49	50	obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o
50	51	obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o
51	52	obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o
	1	+/*
	2	+ * Retu power button driver.
	3	+ *
	4	+ * Copyright (C) 2004-2010 Nokia Corporation
	5	+ *
	6	+ * Original code written by Ari Saastamoinen, Juha Yrjölä and Felipe Balbi.
	7	+ * Rewritten by Aaro Koskinen.
	8	+ *
	9	+ * This file is subject to the terms and conditions of the GNU General
	10	+ * Public License. See the file "COPYING" in the main directory of this
	11	+ * archive for more details.
	12	+ *
	13	+ * This program is distributed in the hope that it will be useful,
	14	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	+ * GNU General Public License for more details.
	17	+ */
	18	+
	19	+#include <linux/irq.h>
	20	+#include <linux/init.h>
	21	+#include <linux/slab.h>
	22	+#include <linux/errno.h>
	23	+#include <linux/input.h>
	24	+#include <linux/kernel.h>
	25	+#include <linux/module.h>
	26	+#include <linux/mfd/retu.h>
	27	+#include <linux/interrupt.h>
	28	+#include <linux/platform_device.h>
	29	+
	30	+#define RETU_STATUS_PWRONX (1 << 5)
	31	+
	32	+static irqreturn_t retu_pwrbutton_irq(int irq, void *_pwr)
	33	+{
	34	+ struct input_dev *idev = _pwr;
	35	+ struct retu_dev *rdev = input_get_drvdata(idev);
	36	+ bool state;
	37	+
	38	+ state = !(retu_read(rdev, RETU_REG_STATUS) & RETU_STATUS_PWRONX);
	39	+ input_report_key(idev, KEY_POWER, state);
	40	+ input_sync(idev);
	41	+
	42	+ return IRQ_HANDLED;
	43	+}
	44	+
	45	+static int __devinit retu_pwrbutton_probe(struct platform_device *pdev)
	46	+{
	47	+ struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent);
	48	+ struct input_dev *idev;
	49	+ int irq;
	50	+ int error;
	51	+
	52	+ irq = platform_get_irq(pdev, 0);
	53	+ if (irq < 0)
	54	+ return irq;
	55	+
	56	+ idev = devm_input_allocate_device(&pdev->dev);
	57	+ if (!idev)
	58	+ return -ENOMEM;
	59	+
	60	+ idev->name = "retu-pwrbutton";
	61	+ idev->dev.parent = &pdev->dev;
	62	+
	63	+ input_set_capability(idev, EV_KEY, KEY_POWER);
	64	+ input_set_drvdata(idev, rdev);
	65	+
	66	+ error = devm_request_threaded_irq(&pdev->dev, irq,
	67	+ NULL, retu_pwrbutton_irq, 0,
	68	+ "retu-pwrbutton", idev);
	69	+ if (error)
	70	+ return error;
	71	+
	72	+ error = input_register_device(idev);
	73	+ if (error)
	74	+ return error;
	75	+
	76	+ return 0;
	77	+}
	78	+
	79	+static int __devexit retu_pwrbutton_remove(struct platform_device *pdev)
	80	+{
	81	+ return 0;
	82	+}
	83	+
	84	+static struct platform_driver retu_pwrbutton_driver = {
	85	+ .probe = retu_pwrbutton_probe,
	86	+ .remove = __devexit_p(retu_pwrbutton_remove),
	87	+ .driver = {
	88	+ .name = "retu-pwrbutton",
	89	+ .owner = THIS_MODULE,
	90	+ },
	91	+};
	92	+module_platform_driver(retu_pwrbutton_driver);
	93	+
	94	+MODULE_ALIAS("platform:retu-pwrbutton");
	95	+MODULE_DESCRIPTION("Retu Power Button");
	96	+MODULE_AUTHOR("Ari Saastamoinen");
	97	+MODULE_AUTHOR("Felipe Balbi");
	98	+MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
	99	+MODULE_LICENSE("GPL");