1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/input/misc/pcf50633-input.c b/drivers/input/misc/pcf50633-input.c
new file mode 100644
index 0000000000..4c60c70c4c
--- /dev/null
+++ b/drivers/input/misc/pcf50633-input.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* NXP PCF50633 Input Driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * Broken down from monstrous PCF50633 driver mainly by
+ * Harald Welte, Andy Green and Werner Almesberger
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/pcf50633/core.h>
+
+#define PCF50633_OOCSTAT_ONKEY	0x01
+#define PCF50633_REG_OOCSTAT	0x12
+#define PCF50633_REG_OOCMODE	0x10
+
+struct pcf50633_input {
+	struct pcf50633 *pcf;
+	struct input_dev *input_dev;
+};
+
+static void
+pcf50633_input_irq(int irq, void *data)
+{
+	struct pcf50633_input *input;
+	int onkey_released;
+
+	input = data;
+
+	/* We report only one event depending on the key press status */
+	onkey_released = pcf50633_reg_read(input->pcf, PCF50633_REG_OOCSTAT)
+						& PCF50633_OOCSTAT_ONKEY;
+
+	if (irq == PCF50633_IRQ_ONKEYF && !onkey_released)
+		input_report_key(input->input_dev, KEY_POWER, 1);
+	else if (irq == PCF50633_IRQ_ONKEYR && onkey_released)
+		input_report_key(input->input_dev, KEY_POWER, 0);
+
+	input_sync(input->input_dev);
+}
+
+static int pcf50633_input_probe(struct platform_device *pdev)
+{
+	struct pcf50633_input *input;
+	struct input_dev *input_dev;
+	int ret;
+
+
+	input = kzalloc(sizeof(*input), GFP_KERNEL);
+	if (!input)
+		return -ENOMEM;
+
+	input_dev = input_allocate_device();
+	if (!input_dev) {
+		kfree(input);
+		return -ENOMEM;
+	}
+
+	platform_set_drvdata(pdev, input);
+	input->pcf = dev_to_pcf50633(pdev->dev.parent);
+	input->input_dev = input_dev;
+
+	input_dev->name = "PCF50633 PMU events";
+	input_dev->id.bustype = BUS_I2C;
+	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_PWR);
+	set_bit(KEY_POWER, input_dev->keybit);
+
+	ret = input_register_device(input_dev);
+	if (ret) {
+		input_free_device(input_dev);
+		kfree(input);
+		return ret;
+	}
+	pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYR,
+				pcf50633_input_irq, input);
+	pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYF,
+				pcf50633_input_irq, input);
+
+	return 0;
+}
+
+static int pcf50633_input_remove(struct platform_device *pdev)
+{
+	struct pcf50633_input *input  = platform_get_drvdata(pdev);
+
+	pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYR);
+	pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYF);
+
+	input_unregister_device(input->input_dev);
+	kfree(input);
+
+	return 0;
+}
+
+static struct platform_driver pcf50633_input_driver = {
+	.driver = {
+		.name = "pcf50633-input",
+	},
+	.probe = pcf50633_input_probe,
+	.remove = pcf50633_input_remove,
+};
+module_platform_driver(pcf50633_input_driver);
+
+MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
+MODULE_DESCRIPTION("PCF50633 input driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcf50633-input");