diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/iio/light/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/staging/iio/light/Makefile | 1 | ||||
| -rw-r--r-- | drivers/staging/iio/light/tsl2561.c | 272 |
3 files changed, 0 insertions, 282 deletions
diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig index cf0d0d6..ab54191 100644 --- a/drivers/staging/iio/light/Kconfig +++ b/drivers/staging/iio/light/Kconfig @@ -3,15 +3,6 @@ # comment "Light sensors" -config TSL2561 - tristate "TAOS TSL2561 light-to-digital convertor" - depends on I2C - help - Say yes bere to build support for the TAOS light to digital - convertor. This chip has two light sensors. One is broadband - including infrared whilst the other measures only infrared. - Provides direct access via sysfs. - config SENSORS_TSL2563 tristate "TAOS TSL2563 ambient light sensor" depends on I2C diff --git a/drivers/staging/iio/light/Makefile b/drivers/staging/iio/light/Makefile index 30dbfb1..30f3300 100644 --- a/drivers/staging/iio/light/Makefile +++ b/drivers/staging/iio/light/Makefile @@ -2,5 +2,4 @@ # Makefile for industrial I/O Light sensors # -obj-$(CONFIG_TSL2561) += tsl2561.o obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o diff --git a/drivers/staging/iio/light/tsl2561.c b/drivers/staging/iio/light/tsl2561.c deleted file mode 100644 index fc2107f..0000000 --- a/drivers/staging/iio/light/tsl2561.c +++ /dev/null @@ -1,272 +0,0 @@ -/* - * tsl2561.c - Linux kernel modules for light to digital convertor - * - * Copyright (C) 2008-2009 Jonathan Cameron <jic23@cam.ac.uk> - * - * 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. - * - * 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, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * Some portions based upon the tsl2550 driver. - * - * This driver could probably be adapted easily to talk to the tsl2560 (smbus) - * - * Needs some work to support the events this can generate. - * Todo: Implement interrupt handling. Currently a hardware bug means - * this isn't available on my test board. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include "../iio.h" -#include "../sysfs.h" -#include "light.h" - -#define TSL2561_CONTROL_REGISTER 0x00 -#define TSL2561_TIMING_REGISTER 0x01 -#define TSL2561_THRESHLOW_LOW_REGISTER 0x02 -#define TSL2561_THRESHLOW_HIGH_REGISTER 0x03 -#define TSL2561_THRESHHIGH_LOW_REGISTER 0x04 -#define TSL2561_THRESHHIGH_HIGH_REGISTER 0x05 -#define TSL2561_INT_CONTROL_REGISTER 0x06 - -#define TSL2561_INT_REG_INT_OFF 0x00 -#define TSL2561_INT_REG_INT_LEVEL 0x08 -#define TSL2561_INT_REG_INT_SMBUS 0x10 -#define TSL2561_INT_REG_INT_TEST 0x18 - -#define TSL2561_ID_REGISTER 0x0A - -#define TSL2561_DATA_0_LOW 0x0C -#define TSL2561_DATA_1_LOW 0x0E - -/* Control Register Values */ -#define TSL2561_CONT_REG_PWR_ON 0x03 -#define TSL2561_CONT_REG_PWR_OFF 0x00 - -/** - * struct tsl2561_state - device specific state - * @indio_dev: the industrialio I/O info structure - * @client: i2c client - * @command_buf: single command buffer used for all operations - * @command_buf_lock: ensure unique access to command_buf - */ -struct tsl2561_state { - struct iio_dev *indio_dev; - struct i2c_client *client; - struct tsl2561_command *command_buf; - struct mutex command_buf_lock; -}; - -/** - * struct tsl2561_command - command byte for smbus - * @address: register address - * @block: is this a block r/w - * @word: is this a word r/w - * @clear: set to 1 to clear pending interrupt - * @cmd: select the command register - always 1. - */ -struct tsl2561_command { - unsigned int address:4; - unsigned int block:1; - unsigned int word:1; - unsigned int clear:1; - unsigned int cmd:1; -}; - -static inline void tsl2561_init_command_buf(struct tsl2561_command *buf) -{ - buf->address = 0; - buf->block = 0; - buf->word = 0; - buf->clear = 0; - buf->cmd = 1; -} - -static ssize_t tsl2561_read_val(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int ret = 0, data; - ssize_t len = 0; - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct tsl2561_state *st = indio_dev->dev_data; - - mutex_lock(&st->command_buf_lock); - st->command_buf->cmd = 1; - st->command_buf->word = 1; - st->command_buf->address = this_attr->address; - - data = i2c_smbus_read_word_data(st->client, *(char *)(st->command_buf)); - if (data < 0) { - ret = data; - goto error_ret; - } - len = sprintf(buf, "%u\n", data); - -error_ret: - mutex_unlock(&st->command_buf_lock); - - return ret ? ret : len; -} - -static IIO_DEV_ATTR_LIGHT_INFRARED(0, tsl2561_read_val, TSL2561_DATA_0_LOW); -static IIO_DEV_ATTR_LIGHT_BROAD(0, tsl2561_read_val, TSL2561_DATA_1_LOW); - -static struct attribute *tsl2561_attributes[] = { - &iio_dev_attr_light_infrared0.dev_attr.attr, - &iio_dev_attr_light_broadspectrum0.dev_attr.attr, - NULL, -}; - -static const struct attribute_group tsl2561_attribute_group = { - .attrs = tsl2561_attributes, -}; - -static int tsl2561_initialize(struct tsl2561_state *st) -{ - int err; - - mutex_lock(&st->command_buf_lock); - st->command_buf->word = 0; - st->command_buf->block = 0; - st->command_buf->address = TSL2561_CONTROL_REGISTER; - err = i2c_smbus_write_byte_data(st->client, *(char *)(st->command_buf), - TSL2561_CONT_REG_PWR_ON); - if (err) - goto error_ret; - - st->command_buf->address = TSL2561_INT_CONTROL_REGISTER; - err = i2c_smbus_write_byte_data(st->client, *(char *)(st->command_buf), - TSL2561_INT_REG_INT_TEST); - -error_ret: - mutex_unlock(&st->command_buf_lock); - - return err; -} - -static int tsl2561_powerdown(struct i2c_client *client) -{ - int err; - struct tsl2561_command Command = { - .cmd = 1, - .clear = 0, - .word = 0, - .block = 0, - .address = TSL2561_CONTROL_REGISTER, - }; - - err = i2c_smbus_write_byte_data(client, *(char *)(&Command), - TSL2561_CONT_REG_PWR_OFF); - return (err < 0) ? err : 0; -} -static int __devinit tsl2561_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int ret = 0, regdone = 0; - struct tsl2561_state *st = kzalloc(sizeof(*st), GFP_KERNEL); - - if (st == NULL) { - ret = -ENOMEM; - goto error_ret; - } - i2c_set_clientdata(client, st); - st->client = client; - mutex_init(&st->command_buf_lock); - - st->command_buf = kmalloc(sizeof(*st->command_buf), GFP_KERNEL); - if (st->command_buf == NULL) { - ret = -ENOMEM; - goto error_free_state; - } - tsl2561_init_command_buf(st->command_buf); - - st->indio_dev = iio_allocate_device(); - if (st->indio_dev == NULL) { - ret = -ENOMEM; - goto error_free_command_buf; - } - st->indio_dev->attrs = &tsl2561_attribute_group; - st->indio_dev->dev.parent = &client->dev; - st->indio_dev->dev_data = (void *)(st); - st->indio_dev->driver_module = THIS_MODULE; - st->indio_dev->modes = INDIO_DIRECT_MODE; - ret = iio_device_register(st->indio_dev); - if (ret) - goto error_free_iiodev; - regdone = 1; - /* Intialize the chip */ - ret = tsl2561_initialize(st); - if (ret) - goto error_unregister_iiodev; - - return 0; -error_unregister_iiodev: -error_free_iiodev: - if (regdone) - iio_device_unregister(st->indio_dev); - else - iio_free_device(st->indio_dev); -error_free_command_buf: - kfree(st->command_buf); -error_free_state: - kfree(st); -error_ret: - return ret; - -} - -static int __devexit tsl2561_remove(struct i2c_client *client) -{ - struct tsl2561_state *st = i2c_get_clientdata(client); - - iio_device_unregister(st->indio_dev); - kfree(st); - - return tsl2561_powerdown(client); -} - -static const struct i2c_device_id tsl2561_id[] = { - { "tsl2561", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, tsl2561_id); - - -static struct i2c_driver tsl2561_driver = { - .driver = { - .name = "tsl2561", - }, - .probe = tsl2561_probe, - .remove = __devexit_p(tsl2561_remove), - .id_table = tsl2561_id, -}; - -static __init int tsl2561_init(void) -{ - return i2c_add_driver(&tsl2561_driver); -} -module_init(tsl2561_init); - -static __exit void tsl2561_exit(void) -{ - i2c_del_driver(&tsl2561_driver); -} -module_exit(tsl2561_exit); - -MODULE_AUTHOR("Jonathan Cameron <jic23@cam.ac.uk>"); -MODULE_DESCRIPTION("TSL2561 light sensor driver"); -MODULE_LICENSE("GPL"); |