[PATCH] input: support onkey in 88pm860x
Haojian Zhuang
haojian.zhuang at marvell.com
Wed Feb 3 15:40:59 EST 2010
Signed-off-by: Haojian Zhuang <haojian.zhuang at marvell.com>
---
drivers/input/misc/88pm860x_onkey.c | 154 +++++++++++++++++++++++++++++++++++
drivers/input/misc/Kconfig | 10 +++
drivers/input/misc/Makefile | 1 +
3 files changed, 165 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/misc/88pm860x_onkey.c
diff --git a/drivers/input/misc/88pm860x_onkey.c
b/drivers/input/misc/88pm860x_onkey.c
new file mode 100644
index 0000000..a846e67
--- /dev/null
+++ b/drivers/input/misc/88pm860x_onkey.c
@@ -0,0 +1,154 @@
+/*
+ * 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver
+ *
+ * Copyright (C) 2009-2010 Marvell International Ltd.
+ * Haojian Zhuang <haojian.zhuang at marvell.com>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/88pm860x.h>
+
+#define PM8607_WAKEUP 0x0b
+
+#define LONG_ONKEY_EN (1 << 1)
+#define ONKEY_STATUS (1 << 0)
+
+struct pm860x_onkey_info {
+ struct input_dev *idev;
+ struct pm860x_chip *chip;
+ struct i2c_client *i2c;
+ struct device *dev;
+ int irq;
+};
+
+/* 88PM860x gives us an interrupt when ONKEY is held */
+static irqreturn_t pm860x_onkey_handler(int irq, void *data)
+{
+ struct pm860x_onkey_info *info = data;
+ int ret;
+
+ ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
+ ret &= ONKEY_STATUS;
+ input_report_key(info->idev, KEY_POWER, ret);
+ input_sync(info->idev);
+
+ /* Enable 8-second long onkey detection */
+ pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
+ return IRQ_HANDLED;
+}
+
+static int __devinit pm860x_onkey_probe(struct platform_device *pdev)
+{
+ struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct pm860x_onkey_info *info;
+ int irq, ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "No IRQ resource!\n");
+ return -EINVAL;
+ }
+
+ info = kzalloc(sizeof(struct pm860x_onkey_info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+ info->chip = chip;
+ info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
+ info->dev = &pdev->dev;
+ info->irq = irq + chip->irq_base;
+
+ ret = request_threaded_irq(info->irq, NULL, pm860x_onkey_handler,
+ IRQF_ONESHOT, "onkey", info);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
+ info->irq, ret);
+ goto out;
+ }
+
+ info->idev = input_allocate_device();
+ if (!info->idev) {
+ dev_err(chip->dev, "Failed to allocate input dev\n");
+ ret = -ENOMEM;
+ goto out_input;
+ }
+
+ info->idev->name = "88pm860x_on";
+ info->idev->phys = "88pm860x_on/input0";
+ info->idev->id.bustype = BUS_I2C;
+ info->idev->dev.parent = &pdev->dev;
+ info->irq = irq;
+ info->idev->evbit[0] = BIT_MASK(EV_KEY);
+ info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
+
+ ret = input_register_device(info->idev);
+ if (ret) {
+ dev_err(chip->dev, "Can't register input device: %d\n", ret);
+ goto out_reg;
+ }
+ platform_set_drvdata(pdev, info);
+
+ return 0;
+
+out_reg:
+ input_free_device(info->idev);
+out_input:
+ free_irq(info->irq, info);
+out:
+ kfree(info);
+ return ret;
+}
+
+static int __devexit pm860x_onkey_remove(struct platform_device *pdev)
+{
+ struct pm860x_onkey_info *info = platform_get_drvdata(pdev);
+
+ if (info) {
+ free_irq(info->irq, info);
+ input_unregister_device(info->idev);
+ kfree(info);
+ }
+ return 0;
+}
+
+static struct platform_driver pm860x_onkey_driver = {
+ .driver = {
+ .name = "88pm860x-onkey",
+ .owner = THIS_MODULE,
+ },
+ .probe = pm860x_onkey_probe,
+ .remove = __devexit_p(pm860x_onkey_remove),
+};
+
+static int __init pm860x_onkey_init(void)
+{
+ return platform_driver_register(&pm860x_onkey_driver);
+}
+module_init(pm860x_onkey_init);
+
+static void __exit pm860x_onkey_exit(void)
+{
+ platform_driver_unregister(&pm860x_onkey_driver);
+}
+module_exit(pm860x_onkey_exit);
+
+MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver");
+MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang at marvell.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 32f9e02..3cd878f 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -12,6 +12,16 @@ menuconfig INPUT_MISC
if INPUT_MISC
+config INPUT_88PM860X_ONKEY
+ tristate "88PM860x ONKEY support"
+ depends on MFD_88PM860X
+ help
+ Support the ONKEY of Marvell 88PM860x PMICs as an input device
+ reporting power button status.
+
+ To compile this driver as a module, choose M here: the module
+ will be called 88pm860x_onkey.
+
config INPUT_PCSPKR
tristate "PC Speaker support"
depends on PCSPKR_PLATFORM
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index d903dab..6d6130f 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -4,6 +4,7 @@
# Each configuration option enables a list of files.
+obj-$(CONFIG_INPUT_88PM860X_ONKEY) += 88pm860x_onkey.o
obj-$(CONFIG_INPUT_APANEL) += apanel.o
obj-$(CONFIG_INPUT_ATI_REMOTE) += ati_remote.o
obj-$(CONFIG_INPUT_ATI_REMOTE2) += ati_remote2.o
--
1.5.6.5
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