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Message-ID: <1349952316.9228.7.camel@dhruva>
Date: Thu, 11 Oct 2012 16:15:16 +0530
From: Ashish Jangam <ashish.jangam@...tcummins.com>
To: Liam Girdwood <lrg@...mlogic.co.uk>
CC: Samuel Ortiz <sameo@...ux.intel.com>,
<linux-input@...r.kernel.org>,
David Dajun Chen <dchen@...semi.com>,
<linux-kernel@...r.kernel.org>
Subject: [Patch v3 7/7] Onkey: DA9055 Onkey driver
This is the ONKEY driver of the Dialog DA9055 PMIC and depends on the DA9055 MFD
core driver.
This patch is functionally tested on SMDK6410 board.
Signed-off-by: David Dajun Chen <dchen@...semi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@...tcummins.com>
---
changes since v3:
- used of module_platform_driver macro
- add regmap virtual irq function
changes since v2:
- add support for button release
- use of devm_request_threaded_irq API
---
drivers/input/misc/Kconfig | 10 ++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/da9055_onkey.c | 167 +++++++++++++++++++++++++++++++++++++
3 files changed, 178 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/misc/da9055_onkey.c
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 7c0f1ec..6a45cb8 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -486,6 +486,16 @@ config INPUT_DA9052_ONKEY
To compile this driver as a module, choose M here: the
module will be called da9052_onkey.
+config INPUT_DA9055_ONKEY
+ tristate "Dialog Semiconductor DA9055 ONKEY"
+ depends on MFD_DA9055
+ help
+ Support the ONKEY of DA9055 PMICs as an input device
+ reporting power button status.
+
+ To compile this driver as a module, choose M here: the module
+ will be called da9055_onkey.
+
config INPUT_DM355EVM
tristate "TI DaVinci DM355 EVM Keypad and IR Remote"
depends on MFD_DM355EVM_MSP
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 83fe6f5..23347e3 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o
obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o
+obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o
obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o
obj-$(CONFIG_INPUT_GPIO_TILT_POLLED) += gpio_tilt_polled.o
diff --git a/drivers/input/misc/da9055_onkey.c b/drivers/input/misc/da9055_onkey.c
new file mode 100644
index 0000000..2addd6d
--- /dev/null
+++ b/drivers/input/misc/da9055_onkey.c
@@ -0,0 +1,167 @@
+/*
+ * ON pin driver for Dialog DA9055 PMICs
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@...semi.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/da9055/core.h>
+#include <linux/mfd/da9055/reg.h>
+
+struct da9055_onkey {
+ struct da9055 *da9055;
+ struct input_dev *input;
+ struct delayed_work work;
+};
+
+static void da9055_onkey_query(struct da9055_onkey *onkey)
+{
+ int key_stat;
+
+ key_stat = da9055_reg_read(onkey->da9055, DA9055_REG_STATUS_A);
+ if (key_stat < 0) {
+ dev_err(onkey->da9055->dev,
+ "Failed to read onkey event %d\n", key_stat);
+ } else {
+ key_stat &= DA9055_NOKEY_STS;
+ /*
+ * Onkey status bit is cleared when onkey button is relased.
+ */
+ if (!key_stat) {
+ input_report_key(onkey->input, KEY_POWER, 0);
+ input_sync(onkey->input);
+ }
+ }
+
+ /*
+ * Interrupt is generated only when the ONKEY pin is asserted.
+ * Hence the deassertion of the pin is simulated through work queue.
+ */
+ if (key_stat)
+ schedule_delayed_work(&onkey->work, msecs_to_jiffies(10));
+
+}
+
+static void da9055_onkey_work(struct work_struct *work)
+{
+ struct da9055_onkey *onkey = container_of(work, struct da9055_onkey,
+ work.work);
+
+ da9055_onkey_query(onkey);
+}
+
+static irqreturn_t da9055_onkey_irq(int irq, void *data)
+{
+ struct da9055_onkey *onkey = data;
+
+ input_report_key(onkey->input, KEY_POWER, 1);
+ input_sync(onkey->input);
+
+ da9055_onkey_query(onkey);
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit da9055_onkey_probe(struct platform_device *pdev)
+{
+ struct input_dev *input_dev;
+ struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
+ struct da9055_onkey *onkey;
+ int irq, err;
+
+ irq = platform_get_irq_byname(pdev, "ONKEY");
+ if (irq < 0) {
+ dev_err(&pdev->dev,
+ "Failed to get an IRQ for input device, %d\n", irq);
+ return -EINVAL;
+ }
+
+ onkey = devm_kzalloc(&pdev->dev, sizeof(*onkey), GFP_KERNEL);
+ if (!onkey) {
+ dev_err(&pdev->dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ dev_err(&pdev->dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ onkey->input = input_dev;
+ onkey->da9055 = da9055;
+ input_dev->name = "da9055-onkey";
+ input_dev->phys = "da9055-onkey/input0";
+ input_dev->dev.parent = &pdev->dev;
+
+ input_dev->evbit[0] = BIT_MASK(EV_KEY);
+ __set_bit(KEY_POWER, input_dev->keybit);
+
+ INIT_DELAYED_WORK(&onkey->work, da9055_onkey_work);
+
+ irq = regmap_irq_get_virq(da9055->irq_data, irq);
+ err = devm_request_threaded_irq(&pdev->dev, irq, NULL, da9055_onkey_irq,
+ IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+ "ONKEY", onkey);
+ if (err < 0) {
+ dev_err(&pdev->dev,
+ "Failed to register ONKEY IRQ %d, error = %d\n",
+ irq, err);
+ goto free_onkey;
+ }
+
+ err = input_register_device(input_dev);
+ if (err) {
+ dev_err(&pdev->dev, "Unable to register input device, %d\n",
+ err);
+ goto free_irq;
+ }
+
+ platform_set_drvdata(pdev, onkey);
+
+ return 0;
+
+free_irq:
+free_onkey:
+ cancel_delayed_work_sync(&onkey->work);
+ input_free_device(input_dev);
+
+ return err;
+}
+
+static int __devexit da9055_onkey_remove(struct platform_device *pdev)
+{
+ struct da9055_onkey *onkey = platform_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&onkey->work);
+ input_unregister_device(onkey->input);
+
+ return 0;
+}
+
+static struct platform_driver da9055_onkey_driver = {
+ .probe = da9055_onkey_probe,
+ .remove = __devexit_p(da9055_onkey_remove),
+ .driver = {
+ .name = "da9055-onkey",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(da9055_onkey_driver);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@...semi.com>");
+MODULE_DESCRIPTION("Onkey driver for DA9055");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da9055-onkey");
--
1.7.0.4
--
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