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Message-Id: <1346703805-31598-5-git-send-email-aaro.koskinen@iki.fi>
Date: Mon, 3 Sep 2012 23:23:25 +0300
From: Aaro Koskinen <aaro.koskinen@....fi>
To: linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: linux-input@...r.kernel.org
Subject: [PATCH 4/4] input: misc: introduce retu-pwrbutton
Add Retu power button driver.
Cc: linux-input@...r.kernel.org
Signed-off-by: Aaro Koskinen <aaro.koskinen@....fi>
---
drivers/input/misc/Kconfig | 10 +++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/retu-pwrbutton.c | 127 +++++++++++++++++++++++++++++++++++
3 files changed, 138 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/misc/retu-pwrbutton.c
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 7c0f1ec..e5be189 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -367,6 +367,16 @@ 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 83fe6f5..4fbee0d 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -45,6 +45,7 @@ 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
index 0000000..f802d4d
--- /dev/null
+++ b/drivers/input/misc/retu-pwrbutton.c
@@ -0,0 +1,127 @@
+/*
+ * Retu power button driver.
+ *
+ * Copyright (C) 2004-2010 Nokia Corporation
+ *
+ * Original code written by Ari Saastamoinen, Juha Yrjölä and Felipe Balbi.
+ * Converted to use to use Retu MFD driver 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)
+
+struct retu_pwrbutton {
+ struct input_dev *idev;
+ struct retu_dev *rdev;
+ struct device *dev;
+ bool pressed;
+ int irq;
+};
+
+static irqreturn_t retu_pwrbutton_irq(int irq, void *_pwr)
+{
+ struct retu_pwrbutton *pwr = _pwr;
+ bool state;
+
+ state = !(retu_read(pwr->rdev, RETU_REG_STATUS) & RETU_STATUS_PWRONX);
+
+ if (pwr->pressed != state) {
+ input_report_key(pwr->idev, KEY_POWER, state);
+ input_sync(pwr->idev);
+ pwr->pressed = state;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit retu_pwrbutton_probe(struct platform_device *pdev)
+{
+ struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent);
+ struct retu_pwrbutton *pwr;
+ int ret;
+
+ pwr = kzalloc(sizeof(*pwr), GFP_KERNEL);
+ if (!pwr)
+ return -ENOMEM;
+
+ pwr->rdev = rdev;
+ pwr->dev = &pdev->dev;
+ pwr->irq = platform_get_irq(pdev, 0);
+ platform_set_drvdata(pdev, pwr);
+
+ ret = request_threaded_irq(pwr->irq, NULL, retu_pwrbutton_irq, 0,
+ "retu-pwrbutton", pwr);
+ if (ret < 0)
+ goto error_irq;
+
+ pwr->idev = input_allocate_device();
+ if (!pwr->idev) {
+ ret = -ENOMEM;
+ goto error_input;
+ }
+
+ pwr->idev->evbit[0] = BIT_MASK(EV_KEY);
+ pwr->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
+ pwr->idev->name = "retu-pwrbutton";
+
+ ret = input_register_device(pwr->idev);
+ if (ret < 0)
+ goto error_reg;
+
+ return 0;
+
+error_reg:
+ input_free_device(pwr->idev);
+error_input:
+ free_irq(pwr->irq, pwr);
+error_irq:
+ kfree(pwr);
+ return ret;
+}
+
+static int __devexit retu_pwrbutton_remove(struct platform_device *pdev)
+{
+ struct retu_pwrbutton *pwr = platform_get_drvdata(pdev);
+
+ free_irq(pwr->irq, pwr);
+ input_unregister_device(pwr->idev);
+ input_free_device(pwr->idev);
+ kfree(pwr);
+
+ return 0;
+}
+
+static struct platform_driver retu_pwrbutton_driver = {
+ .probe = retu_pwrbutton_probe,
+ .remove = __devexit_p(retu_pwrbutton_remove),
+ .driver = {
+ .name = "retu-pwrbutton",
+ },
+};
+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@....fi>");
+MODULE_LICENSE("GPL");
--
1.7.2.5
--
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