Commit 7ef9153d authored by Linus Walleij's avatar Linus Walleij Committed by Greg Kroah-Hartman
Browse files

misc: delete bh1780 driver 



The Rohm BH1780 ambient light sensor has a new driver with extended
functionality (proper runtime PM) in the appropriate framework IIO,
it can be found at:
drivers/iio/light/bh1780.c

The MISC driver symbol CONFIG_SENSORS_BH1780 does not appear in any
defconfigs, so it should safe to delete.

Cc: Hemanth V <hemanthv@ti.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 694d0d0b

drivers/misc/Kconfig

+0 −10
Original line number Diff line number Diff line
@@ -345,16 +345,6 @@ config SENSORS_TSL2550 
	  This driver can also be built as a module.  If so, the module

	  will be called tsl2550.



config SENSORS_BH1780

	tristate "ROHM BH1780GLI ambient light sensor"

	depends on I2C && SYSFS

	help

	  If you say yes here you get support for the ROHM BH1780GLI

	  ambient light sensor.



	  This driver can also be built as a module.  If so, the module

	  will be called bh1780gli.



config SENSORS_BH1770

         tristate "BH1770GLC / SFH7770 combined ALS - Proximity sensor"

         depends on I2C

drivers/misc/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -19,7 +19,6 @@ obj-$(CONFIG_TIFM_CORE) += tifm_core.o 
obj-$(CONFIG_TIFM_7XX1)       	+= tifm_7xx1.o

obj-$(CONFIG_PHANTOM)		+= phantom.o

obj-$(CONFIG_QCOM_COINCELL)	+= qcom-coincell.o

obj-$(CONFIG_SENSORS_BH1780)	+= bh1780gli.o

obj-$(CONFIG_SENSORS_BH1770)	+= bh1770glc.o

obj-$(CONFIG_SENSORS_APDS990X)	+= apds990x.o

obj-$(CONFIG_SGI_IOC4)		+= ioc4.o

drivers/misc/bh1780gli.c

deleted100644 → 0
+0 −259
Original line number Diff line number Diff line 
/*

 * bh1780gli.c

 * ROHM Ambient Light Sensor Driver

 *

 * Copyright (C) 2010 Texas Instruments

 * Author: Hemanth V <hemanthv@ti.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.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#include <linux/i2c.h>

#include <linux/slab.h>

#include <linux/mutex.h>

#include <linux/platform_device.h>

#include <linux/delay.h>

#include <linux/module.h>

#include <linux/of.h>



#define BH1780_REG_CONTROL	0x80

#define BH1780_REG_PARTID	0x8A

#define BH1780_REG_MANFID	0x8B

#define BH1780_REG_DLOW	0x8C

#define BH1780_REG_DHIGH	0x8D



#define BH1780_REVMASK		(0xf)

#define BH1780_POWMASK		(0x3)

#define BH1780_POFF		(0x0)

#define BH1780_PON		(0x3)



/* power on settling time in ms */

#define BH1780_PON_DELAY	2



struct bh1780_data {

	struct i2c_client *client;

	int power_state;

	/* lock for sysfs operations */

	struct mutex lock;

};



static int bh1780_write(struct bh1780_data *ddata, u8 reg, u8 val, char *msg)

{

	int ret = i2c_smbus_write_byte_data(ddata->client, reg, val);

	if (ret < 0)

		dev_err(&ddata->client->dev,

			"i2c_smbus_write_byte_data failed error %d Register (%s)\n",

			ret, msg);

	return ret;

}



static int bh1780_read(struct bh1780_data *ddata, u8 reg, char *msg)

{

	int ret = i2c_smbus_read_byte_data(ddata->client, reg);

	if (ret < 0)

		dev_err(&ddata->client->dev,

			"i2c_smbus_read_byte_data failed error %d Register (%s)\n",

			ret, msg);

	return ret;

}



static ssize_t bh1780_show_lux(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct bh1780_data *ddata = platform_get_drvdata(pdev);

	int lsb, msb;



	lsb = bh1780_read(ddata, BH1780_REG_DLOW, "DLOW");

	if (lsb < 0)

		return lsb;



	msb = bh1780_read(ddata, BH1780_REG_DHIGH, "DHIGH");

	if (msb < 0)

		return msb;



	return sprintf(buf, "%d\n", (msb << 8) | lsb);

}



static ssize_t bh1780_show_power_state(struct device *dev,

					struct device_attribute *attr,

					char *buf)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct bh1780_data *ddata = platform_get_drvdata(pdev);

	int state;



	state = bh1780_read(ddata, BH1780_REG_CONTROL, "CONTROL");

	if (state < 0)

		return state;



	return sprintf(buf, "%d\n", state & BH1780_POWMASK);

}



static ssize_t bh1780_store_power_state(struct device *dev,

					struct device_attribute *attr,

					const char *buf, size_t count)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct bh1780_data *ddata = platform_get_drvdata(pdev);

	unsigned long val;

	int error;



	error = kstrtoul(buf, 0, &val);

	if (error)

		return error;



	if (val < BH1780_POFF || val > BH1780_PON)

		return -EINVAL;



	mutex_lock(&ddata->lock);



	error = bh1780_write(ddata, BH1780_REG_CONTROL, val, "CONTROL");

	if (error < 0) {

		mutex_unlock(&ddata->lock);

		return error;

	}



	msleep(BH1780_PON_DELAY);

	ddata->power_state = val;

	mutex_unlock(&ddata->lock);



	return count;

}



static DEVICE_ATTR(lux, S_IRUGO, bh1780_show_lux, NULL);



static DEVICE_ATTR(power_state, S_IWUSR | S_IRUGO,

		bh1780_show_power_state, bh1780_store_power_state);



static struct attribute *bh1780_attributes[] = {

	&dev_attr_power_state.attr,

	&dev_attr_lux.attr,

	NULL

};



static const struct attribute_group bh1780_attr_group = {

	.attrs = bh1780_attributes,

};



static int bh1780_probe(struct i2c_client *client,

						const struct i2c_device_id *id)

{

	int ret;

	struct bh1780_data *ddata;

	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);



	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))

		return -EIO;



	ddata = devm_kzalloc(&client->dev, sizeof(struct bh1780_data),

			     GFP_KERNEL);

	if (ddata == NULL)

		return -ENOMEM;



	ddata->client = client;

	i2c_set_clientdata(client, ddata);



	ret = bh1780_read(ddata, BH1780_REG_PARTID, "PART ID");

	if (ret < 0)

		return ret;



	dev_info(&client->dev, "Ambient Light Sensor, Rev : %d\n",

			(ret & BH1780_REVMASK));



	mutex_init(&ddata->lock);



	return sysfs_create_group(&client->dev.kobj, &bh1780_attr_group);

}



static int bh1780_remove(struct i2c_client *client)

{

	sysfs_remove_group(&client->dev.kobj, &bh1780_attr_group);



	return 0;

}



#ifdef CONFIG_PM_SLEEP

static int bh1780_suspend(struct device *dev)

{

	struct bh1780_data *ddata;

	int state, ret;

	struct i2c_client *client = to_i2c_client(dev);



	ddata = i2c_get_clientdata(client);

	state = bh1780_read(ddata, BH1780_REG_CONTROL, "CONTROL");

	if (state < 0)

		return state;



	ddata->power_state = state & BH1780_POWMASK;



	ret = bh1780_write(ddata, BH1780_REG_CONTROL, BH1780_POFF,

				"CONTROL");



	if (ret < 0)

		return ret;



	return 0;

}



static int bh1780_resume(struct device *dev)

{

	struct bh1780_data *ddata;

	int state, ret;

	struct i2c_client *client = to_i2c_client(dev);



	ddata = i2c_get_clientdata(client);

	state = ddata->power_state;

	ret = bh1780_write(ddata, BH1780_REG_CONTROL, state,

				"CONTROL");



	if (ret < 0)

		return ret;



	return 0;

}

#endif /* CONFIG_PM_SLEEP */



static SIMPLE_DEV_PM_OPS(bh1780_pm, bh1780_suspend, bh1780_resume);



static const struct i2c_device_id bh1780_id[] = {

	{ "bh1780", 0 },

	{ },

};



MODULE_DEVICE_TABLE(i2c, bh1780_id);



#ifdef CONFIG_OF

static const struct of_device_id of_bh1780_match[] = {

	{ .compatible = "rohm,bh1780gli", },

	{},

};



MODULE_DEVICE_TABLE(of, of_bh1780_match);

#endif



static struct i2c_driver bh1780_driver = {

	.probe		= bh1780_probe,

	.remove		= bh1780_remove,

	.id_table	= bh1780_id,

	.driver = {

		.name = "bh1780",

		.pm	= &bh1780_pm,

		.of_match_table = of_match_ptr(of_bh1780_match),

	},

};



module_i2c_driver(bh1780_driver);



MODULE_DESCRIPTION("BH1780GLI Ambient Light Sensor Driver");

MODULE_LICENSE("GPL");

MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>");

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