ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/input/misc/pcap_keys.c b/marvell/linux/drivers/input/misc/pcap_keys.c
new file mode 100644
index 0000000..b5a5363
--- /dev/null
+++ b/marvell/linux/drivers/input/misc/pcap_keys.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Input driver for PCAP events:
+ * * Power key
+ * * Headphone button
+ *
+ * Copyright (c) 2008,2009 Ilya Petrov <ilya.muromec@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/mfd/ezx-pcap.h>
+#include <linux/slab.h>
+
+struct pcap_keys {
+ struct pcap_chip *pcap;
+ struct input_dev *input;
+};
+
+/* PCAP2 interrupts us on keypress */
+static irqreturn_t pcap_keys_handler(int irq, void *_pcap_keys)
+{
+ struct pcap_keys *pcap_keys = _pcap_keys;
+ int pirq = irq_to_pcap(pcap_keys->pcap, irq);
+ u32 pstat;
+
+ ezx_pcap_read(pcap_keys->pcap, PCAP_REG_PSTAT, &pstat);
+ pstat &= 1 << pirq;
+
+ switch (pirq) {
+ case PCAP_IRQ_ONOFF:
+ input_report_key(pcap_keys->input, KEY_POWER, !pstat);
+ break;
+ case PCAP_IRQ_MIC:
+ input_report_key(pcap_keys->input, KEY_HP, !pstat);
+ break;
+ }
+
+ input_sync(pcap_keys->input);
+
+ return IRQ_HANDLED;
+}
+
+static int pcap_keys_probe(struct platform_device *pdev)
+{
+ int err = -ENOMEM;
+ struct pcap_keys *pcap_keys;
+ struct input_dev *input_dev;
+
+ pcap_keys = kmalloc(sizeof(struct pcap_keys), GFP_KERNEL);
+ if (!pcap_keys)
+ return err;
+
+ pcap_keys->pcap = dev_get_drvdata(pdev->dev.parent);
+
+ input_dev = input_allocate_device();
+ if (!input_dev)
+ goto fail;
+
+ pcap_keys->input = input_dev;
+
+ platform_set_drvdata(pdev, pcap_keys);
+ input_dev->name = pdev->name;
+ input_dev->phys = "pcap-keys/input0";
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->dev.parent = &pdev->dev;
+
+ __set_bit(EV_KEY, input_dev->evbit);
+ __set_bit(KEY_POWER, input_dev->keybit);
+ __set_bit(KEY_HP, input_dev->keybit);
+
+ err = input_register_device(input_dev);
+ if (err)
+ goto fail_allocate;
+
+ err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF),
+ pcap_keys_handler, 0, "Power key", pcap_keys);
+ if (err)
+ goto fail_register;
+
+ err = request_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC),
+ pcap_keys_handler, 0, "Headphone button", pcap_keys);
+ if (err)
+ goto fail_pwrkey;
+
+ return 0;
+
+fail_pwrkey:
+ free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);
+fail_register:
+ input_unregister_device(input_dev);
+ goto fail;
+fail_allocate:
+ input_free_device(input_dev);
+fail:
+ kfree(pcap_keys);
+ return err;
+}
+
+static int pcap_keys_remove(struct platform_device *pdev)
+{
+ struct pcap_keys *pcap_keys = platform_get_drvdata(pdev);
+
+ free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_ONOFF), pcap_keys);
+ free_irq(pcap_to_irq(pcap_keys->pcap, PCAP_IRQ_MIC), pcap_keys);
+
+ input_unregister_device(pcap_keys->input);
+ kfree(pcap_keys);
+
+ return 0;
+}
+
+static struct platform_driver pcap_keys_device_driver = {
+ .probe = pcap_keys_probe,
+ .remove = pcap_keys_remove,
+ .driver = {
+ .name = "pcap-keys",
+ }
+};
+module_platform_driver(pcap_keys_device_driver);
+
+MODULE_DESCRIPTION("Motorola PCAP2 input events driver");
+MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcap_keys");