input: misc: add hi6421 onkey driver

Support Hi6421 PMIC powerkey driver.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>

3 files changed, 163 insertions, 0 deletions

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 573d53c1342..5bbd631e3c6 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -103,6 +103,15 @@ config INPUT_E3X0_BUTTON
 	  To compile this driver as a module, choose M here: the
 	  module will be called e3x0_button.
 
+config INPUT_HI6421_ONKEY
+	tristate "Hisilicon Hi6421 PMIC ONKEY support"
+	depends on MFD_HI6421_PMIC
+	help
+	  Say Y to enable support for Hi6421 PMIC ONKEY.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called hi6421_pwrkey.
+
 config INPUT_PCSPKR
 	tristate "PC Speaker support"
 	depends on PCSPKR_PLATFORM
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 73e04eafb42..b65c9a9a02f 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_INPUT_GP2A)		+= gp2ap002a00f.o
 obj-$(CONFIG_INPUT_GPIO_BEEPER)		+= gpio-beeper.o
 obj-$(CONFIG_INPUT_GPIO_TILT_POLLED)	+= gpio_tilt_polled.o
 obj-$(CONFIG_INPUT_GPIO)		+= gpio_event.o gpio_matrix.o gpio_input.o gpio_output.o gpio_axis.o
+obj-$(CONFIG_INPUT_HI6421_ONKEY)	+= hi6421_pwrkey.o
 obj-$(CONFIG_HP_SDC_RTC)		+= hp_sdc_rtc.o
 obj-$(CONFIG_INPUT_IMS_PCU)		+= ims-pcu.o
 obj-$(CONFIG_INPUT_IXP4XX_BEEPER)	+= ixp4xx-beeper.o
diff --git a/drivers/input/misc/hi6421_pwrkey.c b/drivers/input/misc/hi6421_pwrkey.c
new file mode 100644
index 00000000000..31d0145fc68
--- /dev/null
+++ b/drivers/input/misc/hi6421_pwrkey.c
@@ -0,0 +1,153 @@
+/*
+ * hi6421_pwrkey.c - Hisilicon Hi6421 PMIC ONKEY driver
+ *
+ * Copyright (C) 2013 Hisilicon Ltd.
+ * Copyright (C) 2013 Linaro Ltd.
+ * Author: Haojian Zhuang <haojian.zhuang@linaro.org>
+ *
+ * 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/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/hi6421-pmic.h>
+
+struct hi6421_onkey_info {
+	struct input_dev	*idev;
+	int			irq[4];
+};
+
+static irqreturn_t hi6421_onkey_handler(int irq, void *data)
+{
+	struct hi6421_onkey_info *info = (struct hi6421_onkey_info *)data;
+
+	/* only handle power down & power up event at here */
+	if (irq == info->irq[0]) {
+		input_report_key(info->idev, KEY_POWER, 1);
+		input_sync(info->idev);
+	} else if (irq == info->irq[1]) {
+		input_report_key(info->idev, KEY_POWER, 0);
+		input_sync(info->idev);
+	}
+	return IRQ_HANDLED;
+}
+
+static int hi6421_onkey_probe(struct platform_device *pdev)
+{
+	struct hi6421_onkey_info *info;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	info->idev = input_allocate_device();
+	if (!info->idev) {
+		dev_err(&pdev->dev, "Failed to allocate input device\n");
+		return -ENOMEM;
+	}
+	info->idev->name = "hi6421_on";
+	info->idev->phys = "hi6421_on/input0";
+	info->idev->dev.parent = &pdev->dev;
+	info->idev->evbit[0] = BIT_MASK(EV_KEY);
+	__set_bit(KEY_POWER, info->idev->keybit);
+
+	info->irq[0] = platform_get_irq_byname(pdev, "down");
+	if (info->irq[0] < 0) {
+		ret = -ENOENT;
+		goto err_irq0;
+	}
+	ret = request_irq(info->irq[0], hi6421_onkey_handler,
+			  IRQF_DISABLED, "down", info);
+	if (ret < 0)
+		goto err_irq0;
+	info->irq[1] = platform_get_irq_byname(pdev, "up");
+	if (info->irq[1] < 0) {
+		ret = -ENOENT;
+		goto err_irq1;
+	}
+	ret = request_irq(info->irq[1], hi6421_onkey_handler,
+			  IRQF_DISABLED, "up", info);
+	if (ret < 0)
+		goto err_irq1;
+	info->irq[2] = platform_get_irq_byname(pdev, "hold 1s");
+	if (info->irq[2] < 0) {
+		ret = -ENOENT;
+		goto err_irq2;
+	}
+	ret = request_irq(info->irq[2], hi6421_onkey_handler,
+			  IRQF_DISABLED, "hold 1s", info);
+	if (ret < 0)
+		goto err_irq2;
+	info->irq[3] = platform_get_irq_byname(pdev, "hold 10s");
+	if (info->irq[3] < 0) {
+		ret = -ENOENT;
+		goto err_irq3;
+	}
+	ret = request_irq(info->irq[3], hi6421_onkey_handler,
+			  IRQF_DISABLED, "hold 10s", info);
+	if (ret < 0)
+		goto err_irq3;
+
+	ret = input_register_device(info->idev);
+	if (ret) {
+		dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
+		goto err_reg;
+	}
+
+	platform_set_drvdata(pdev, info);
+	return ret;
+err_reg:
+	free_irq(info->irq[3], info);
+err_irq3:
+	free_irq(info->irq[2], info);
+err_irq2:
+	free_irq(info->irq[1], info);
+err_irq1:
+	free_irq(info->irq[0], info);
+err_irq0:
+	input_free_device(info->idev);
+	return ret;
+}
+
+static int hi6421_onkey_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static struct of_device_id hi6421_onkey_of_match[] = {
+	{ .compatible = "hisilicon,hi6421-onkey", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, hi6421_onkey_of_match);
+
+static struct platform_driver hi6421_onkey_driver = {
+	.probe		= hi6421_onkey_probe,
+	.remove		= hi6421_onkey_remove,
+	.driver		= {
+		.owner		= THIS_MODULE,
+		.name		= "hi6421-onkey",
+		.of_match_table	= hi6421_onkey_of_match,
+	},
+};
+module_platform_driver(hi6421_onkey_driver);
+
+MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@linaro.org");
+MODULE_DESCRIPTION("Hi6421 PMIC Power key driver");
+MODULE_LICENSE("GPL v2");