diff mbox

[v2] Input: add regulator haptic driver

Message ID 025101ced083$35f2a270$a1d7e750$%kim@samsung.com
State New, archived
Headers show

Commit Message

Hyunhee Kim Oct. 24, 2013, 6:35 a.m. UTC
From: Hyunhee Kim <hyunhee.kim@samsung.com>
Date: Wed, 9 Oct 2013 16:21:36 +0900
Subject: [PATCH] tizenw: add regulator haptic driver

Signed-off-by: Hyunhee Kim <hyunhee.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Aristeu Rozanski <aris@ruivo.org>

---
 drivers/input/misc/Kconfig            |   10 ++
 drivers/input/misc/Makefile           |    1 +
 drivers/input/misc/regulator-haptic.c |  183
+++++++++++++++++++++++++++++++++
 3 files changed, 194 insertions(+)
 create mode 100644 drivers/input/misc/regulator-haptic.c

+
+MODULE_ALIAS("platform:regulator-haptic");
+MODULE_DESCRIPTION("Regulator haptic driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Hyunhee Kim <hyunhee.kim@samsung.com>");

Comments

Oliver Neukum Oct. 24, 2013, 8:38 a.m. UTC | #1
On Thu, 2013-10-24 at 15:35 +0900, hyunhee.kim wrote:

Hi,

first of all your mail client mangled the patch.

> +static void regulator_haptic_toggle(struct regulator_haptic *haptic, bool
> enable)
> +{
> +	int ret;
> +
> +	mutex_lock(&haptic->mutex);
> +	if (enable && !haptic->enabled) {
> +		haptic->enabled = true;
> +		ret = regulator_enable(haptic->regulator);
> +		if (ret)
> +			dev_err(haptic->dev, "failed to enable
> regulator\n");
> +	} else if (!enable && haptic->enabled) {
> +		haptic->enabled = false;
> +		ret = regulator_disable(haptic->regulator);
> +		if (ret)
> +			dev_err(haptic->dev, "failed to disable
> regulator\n");
> +	}
> +	mutex_unlock(&haptic->mutex);
> +}
> +

Is there anything gained by the toggle parameter? Just code two
functions.

	Regards
		Oliver


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Hyunhee Kim Oct. 24, 2013, 9:26 a.m. UTC | #2
Hi, 

Thanks for your review.
I resent patch v3 after removing wrong wrapping.

I made one toggle function because enable/disable functions have redundant codes and another reviewer suggested it.
Is it better to separate it into two functions?

Thanks,
Hyunhee Kim.

-----Original Message-----
From: Oliver Neukum [mailto:oneukum@suse.de] 
Sent: Thursday, October 24, 2013 5:38 PM
To: hyunhee.kim
Cc: 'Dmitry Torokhov'; broonie@opensource.wolfsonmicro.com; peter.ujfalusi@ti.com; wfp5p@virginia.edu; linux-input@vger.kernel.org; linux-kernel@vger.kernel.org; akpm@linux-foundation.org; kyungmin.park@samsung.com; 'Aristeu Sergio Rozanski Filho'
Subject: Re: [PATCH v2] Input: add regulator haptic driver

On Thu, 2013-10-24 at 15:35 +0900, hyunhee.kim wrote:

Hi,

first of all your mail client mangled the patch.

> +static void regulator_haptic_toggle(struct regulator_haptic *haptic, bool
> enable)
> +{
> +	int ret;
> +
> +	mutex_lock(&haptic->mutex);
> +	if (enable && !haptic->enabled) {
> +		haptic->enabled = true;
> +		ret = regulator_enable(haptic->regulator);
> +		if (ret)
> +			dev_err(haptic->dev, "failed to enable
> regulator\n");
> +	} else if (!enable && haptic->enabled) {
> +		haptic->enabled = false;
> +		ret = regulator_disable(haptic->regulator);
> +		if (ret)
> +			dev_err(haptic->dev, "failed to disable
> regulator\n");
> +	}
> +	mutex_unlock(&haptic->mutex);
> +}
> +

Is there anything gained by the toggle parameter? Just code two
functions.

	Regards
		Oliver


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Oliver Neukum Oct. 24, 2013, 10:30 a.m. UTC | #3
On Thu, 2013-10-24 at 18:26 +0900, hyunhee.kim wrote:
> Hi, 
> 
> Thanks for your review.
> I resent patch v3 after removing wrong wrapping.
> 
> I made one toggle function because enable/disable functions have redundant codes and another reviewer suggested it.
> Is it better to separate it into two functions?

Linus doesn't like parameters affecting behavior.

	Regards
		Oliver


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diff mbox

Patch

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index bb698e1..21b4d5b 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -82,6 +82,16 @@  config INPUT_ARIZONA_HAPTICS
 	  To compile this driver as a module, choose M here: the
 	  module will be called arizona-haptics.
 
+config INPUT_REGULATOR_HAPTIC
+	tristate "support haptics on/off using regulator"
+	select INPUT_FF_MEMLESS
+	help
+	  Say Y to enable support for the haptic module. Haptic can be
+	  enabled/disabled by regulator.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called regulator-haptic.
+
 config INPUT_BMA150
 	tristate "BMA150/SMB380 acceleration sensor support"
 	depends on I2C
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index d7fc17f..106f0bc 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -15,6 +15,7 @@  obj-$(CONFIG_INPUT_ADXL34X_I2C)		+=
adxl34x-i2c.o
 obj-$(CONFIG_INPUT_ADXL34X_SPI)		+= adxl34x-spi.o
 obj-$(CONFIG_INPUT_APANEL)		+= apanel.o
 obj-$(CONFIG_INPUT_ARIZONA_HAPTICS)	+= arizona-haptics.o
+obj-$(CONFIG_INPUT_REGULATOR_HAPTIC)	+= regulator-haptic.o
 obj-$(CONFIG_INPUT_ATI_REMOTE2)		+= ati_remote2.o
 obj-$(CONFIG_INPUT_ATLAS_BTNS)		+= atlas_btns.o
 obj-$(CONFIG_INPUT_BFIN_ROTARY)		+= bfin_rotary.o
diff --git a/drivers/input/misc/regulator-haptic.c
b/drivers/input/misc/regulator-haptic.c
new file mode 100644
index 0000000..c9588d5
--- /dev/null
+++ b/drivers/input/misc/regulator-haptic.c
@@ -0,0 +1,183 @@ 
+/*
+ * Regulator haptic driver
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ *
+ * Author: Hyunhee Kim <hyunhee.kim@samsung.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/platform_device.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/regulator/driver.h>
+
+struct regulator_haptic {
+	struct device *dev;
+	struct input_dev *input_dev;
+	struct work_struct work;
+	bool enabled;
+	struct regulator *regulator;
+	struct mutex mutex;
+	int level;
+};
+
+static void regulator_haptic_toggle(struct regulator_haptic *haptic, bool
enable)
+{
+	int ret;
+
+	mutex_lock(&haptic->mutex);
+	if (enable && !haptic->enabled) {
+		haptic->enabled = true;
+		ret = regulator_enable(haptic->regulator);
+		if (ret)
+			dev_err(haptic->dev, "failed to enable
regulator\n");
+	} else if (!enable && haptic->enabled) {
+		haptic->enabled = false;
+		ret = regulator_disable(haptic->regulator);
+		if (ret)
+			dev_err(haptic->dev, "failed to disable
regulator\n");
+	}
+	mutex_unlock(&haptic->mutex);
+}
+
+static void regulator_haptic_work(struct work_struct *work)
+{
+	struct regulator_haptic *haptic = container_of(work,
+						       struct
regulator_haptic,
+						       work);
+	if (haptic->level)
+		regulator_haptic_toggle(haptic, true);
+	else
+		regulator_haptic_toggle(haptic, false);
+
+}
+
+static int regulator_haptic_play(struct input_dev *input, void *data,
+				struct ff_effect *effect)
+{
+	struct regulator_haptic *haptic = input_get_drvdata(input);
+
+	haptic->level = effect->u.rumble.strong_magnitude;
+	if (!haptic->level)
+		haptic->level = effect->u.rumble.weak_magnitude;
+	schedule_work(&haptic->work);
+
+	return 0;
+}
+
+static void regulator_haptic_close(struct input_dev *input)
+{
+	struct regulator_haptic *haptic = input_get_drvdata(input);
+
+	cancel_work_sync(&haptic->work);
+	regulator_haptic_toggle(haptic, false);
+}
+
+static int regulator_haptic_probe(struct platform_device *pdev)
+{
+	struct regulator_haptic *haptic;
+	struct input_dev *input_dev;
+	int error;
+
+	haptic = devm_kzalloc(&pdev->dev, sizeof(*haptic), GFP_KERNEL);
+	if (!haptic) {
+		dev_err(&pdev->dev, "unable to allocate memory for
haptic\n");
+		return -ENOMEM;
+	}
+
+	input_dev = input_allocate_device();
+
+	if (!input_dev) {
+		dev_err(&pdev->dev, "unable to allocate memory\n");
+		error =  -ENOMEM;
+		goto err_kfree_mem;
+	}
+
+	INIT_WORK(&haptic->work, regulator_haptic_work);
+	mutex_init(&haptic->mutex);
+	haptic->input_dev = input_dev;
+	haptic->dev = &pdev->dev;
+	haptic->regulator = regulator_get(&pdev->dev, "haptic");
+
+	if (IS_ERR(haptic->regulator)) {
+		error = PTR_ERR(haptic->regulator);
+		dev_err(&pdev->dev, "unable to get regulator, err: %d\n",
+			error);
+		goto err_ifree_mem;
+	}
+
+	haptic->input_dev->name = "regulator:haptic";
+	haptic->input_dev->dev.parent = &pdev->dev;
+	haptic->input_dev->close = regulator_haptic_close;
+	haptic->enabled = false;
+	input_set_drvdata(haptic->input_dev, haptic);
+	input_set_capability(haptic->input_dev, EV_FF, FF_RUMBLE);
+
+	error = input_ff_create_memless(input_dev, NULL,
+				      regulator_haptic_play);
+	if (error) {
+		dev_err(&pdev->dev,
+			"input_ff_create_memless() failed: %d\n",
+			error);
+		goto err_put_regulator;
+	}
+
+	error = input_register_device(haptic->input_dev);
+	if (error) {
+		dev_err(&pdev->dev,
+			"couldn't register input device: %d\n",
+			error);
+		goto err_destroy_ff;
+	}
+
+	platform_set_drvdata(pdev, haptic);
+
+	return 0;
+
+err_destroy_ff:
+	input_ff_destroy(haptic->input_dev);
+err_put_regulator:
+	regulator_put(haptic->regulator);
+err_ifree_mem:
+	input_free_device(haptic->input_dev);
+err_kfree_mem:
+	kfree(haptic);
+
+	return error;
+}
+
+static int regulator_haptic_remove(struct platform_device *pdev)
+{
+	struct regulator_haptic *haptic = platform_get_drvdata(pdev);
+
+	input_unregister_device(haptic->input_dev);
+
+	return 0;
+}
+
+static struct of_device_id regulator_haptic_dt_match[] = {
+	{ .compatible = "linux,regulator-haptic" },
+	{},
+};
+
+static struct platform_driver regulator_haptic_driver = {
+	.driver		= {
+		.name	= "regulator-haptic",
+		.owner	= THIS_MODULE,
+		.of_match_table = regulator_haptic_dt_match,
+	},
+
+	.probe		= regulator_haptic_probe,
+	.remove	= regulator_haptic_remove,
+};
+module_platform_driver(regulator_haptic_driver);