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Date: Fri, 7 Aug 2009 22:54:16 +0200
From: Daniel Ribeiro <drwyrm@...il.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
Samuel Ortiz <sameo@...ux.intel.com>
Cc: Daniel Ribeiro <drwyrm@...il.com>, eric.y.miao@...il.com,
linux-arm-kernel@...ts.arm.linux.org.uk,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
openezx-devel@...ts.openezx.org,
Ilya Petrov <ilya.muromec@...il.com>,
Antonio Ospite <ospite@...denti.unina.it>
Subject: [PATCH v3] input: PCAP2 misc input driver
This is a driver for misc input events for the PCAP2 PMIC, it handles
the Power key and the Headphone button.
Signed-off-by: Daniel Ribeiro <drwyrm@...il.com>
Signed-off-by: Ilya Petrov <ilya.muromec@...il.com>
Signed-off-by: Antonio Ospite <ospite@...denti.unina.it>
---
Changes since v2:
* Get pcap data from the parent device, don't abuse
platform device drvdata
pcap_keys v2 is here: http://patchwork.kernel.org/patch/38863/
drivers/input/misc/Kconfig | 11 +++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/pcap_keys.c | 144 ++++++++++++++++++++++++++++++++++++++++
3 files changed, 156 insertions(+), 0 deletions(-)
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 1acfa3a..b9cbb5e 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -269,4 +269,15 @@ config INPUT_DM355EVM
To compile this driver as a module, choose M here: the
module will be called dm355evm_keys.
+
+config INPUT_PCAP
+ tristate "Motorola EZX PCAP misc input events"
+ depends on EZX_PCAP
+ help
+ Say Y here if you want to use Power key and Headphone button
+ on Motorola EZX phones.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pcap_keys.
+
endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 0d979fd..679bae3 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -26,3 +26,4 @@ obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON) += twl4030-pwrbutton.o
obj-$(CONFIG_INPUT_UINPUT) += uinput.o
obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
obj-$(CONFIG_INPUT_YEALINK) += yealink.o
+obj-$(CONFIG_INPUT_PCAP) += pcap_keys.o
diff --git a/drivers/input/misc/pcap_keys.c b/drivers/input/misc/pcap_keys.c
new file mode 100644
index 0000000..7ea9693
--- /dev/null
+++ b/drivers/input/misc/pcap_keys.c
@@ -0,0 +1,144 @@
+/*
+ * Input driver for PCAP events:
+ * * Power key
+ * * Headphone button
+ *
+ * Copyright (c) 2008,2009 Ilya Petrov <ilya.muromec@...il.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/mfd/ezx-pcap.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 __devinit 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 __devexit 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 = __devexit_p(pcap_keys_remove),
+ .driver = {
+ .name = "pcap-keys",
+ .owner = THIS_MODULE,
+ }
+};
+
+static int __init pcap_keys_init(void)
+{
+ return platform_driver_register(&pcap_keys_device_driver);
+};
+
+static void __exit pcap_keys_exit(void)
+{
+ platform_driver_unregister(&pcap_keys_device_driver);
+};
+
+module_init(pcap_keys_init);
+module_exit(pcap_keys_exit);
+
+MODULE_DESCRIPTION("Motorola PCAP2 input events driver");
+MODULE_AUTHOR("Ilya Petrov <ilya.muromec@...il.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcap_keys");
--
tg: (9097083..) ezx/pcap_keys (depends on: ezx/local/pcap)
--
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