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>

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 0f959d7..2a1647e 100644 (file)
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -364,6 +364,16 @@ config INPUT_CM109
          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

diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 23347e3..1f874af 100644 (file)
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -46,6 +46,7 @@ obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY)   += pmic8xxx-pwrkey.o
 obj-$(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

diff --git a/drivers/input/misc/retu-pwrbutton.c b/drivers/input/misc/retu-pwrbutton.c
new file mode 100644 (file)
index 0000000..3767f43
--- /dev/null
+++ b/drivers/input/misc/retu-pwrbutton.c
@@ -0,0 +1,99 @@
+/*
+ * 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");