]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/commitdiff
Input: add DA9055 Onkey driver
authorAshish Jangam <ashish.jangam@kpitcummins.com>
Tue, 30 Oct 2012 07:27:25 +0000 (00:27 -0700)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>
Tue, 30 Oct 2012 07:47:09 +0000 (00:47 -0700)
This is the ONKEY driver of the Dialog DA9055 PMIC and depends on the
DA9055 MFD core driver.

This driver was functionally tested on SMDK6410 board.

Signed-off-by: David Dajun Chen <dchen@diasemi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
drivers/input/misc/Kconfig
drivers/input/misc/Makefile
drivers/input/misc/da9055_onkey.c [new file with mode: 0644]

index a7719a22d17eaa0740e66b86c886d51e0aa05836..c8353570344c57b7ad42068fb1906215954a45e2 100644 (file)
@@ -483,6 +483,16 @@ 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
index 83fe6f5b77d120e9b3194325f0fc83879a474a0a..23347e3f7e96956c341f72da409be5cc93be4a23 100644 (file)
@@ -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 (file)
index 0000000..10ebf15
--- /dev/null
@@ -0,0 +1,171 @@
+/*
+ * ON pin driver for Dialog DA9055 PMICs
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.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 da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
+       struct da9055_onkey *onkey;
+       struct input_dev *input_dev;
+       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 = request_threaded_irq(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 err_free_input;
+       }
+
+       err = input_register_device(input_dev);
+       if (err) {
+               dev_err(&pdev->dev, "Unable to register input device, %d\n",
+                       err);
+               goto err_free_irq;
+       }
+
+       platform_set_drvdata(pdev, onkey);
+
+       return 0;
+
+err_free_irq:
+       free_irq(irq, onkey);
+       cancel_delayed_work_sync(&onkey->work);
+err_free_input:
+       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);
+       int irq = platform_get_irq_byname(pdev, "ONKEY");
+
+       irq = regmap_irq_get_virq(onkey->da9055->irq_data, irq);
+       free_irq(irq, onkey);
+       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@diasemi.com>");
+MODULE_DESCRIPTION("Onkey driver for DA9055");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da9055-onkey");