diff options
Diffstat (limited to 'drivers/i2c/chips')
| -rw-r--r-- | drivers/i2c/chips/Kconfig | 48 | ||||
| -rw-r--r-- | drivers/i2c/chips/Makefile | 3 | ||||
| -rw-r--r-- | drivers/i2c/chips/pca9539.c | 152 | ||||
| -rw-r--r-- | drivers/i2c/chips/pcf8574.c | 215 | ||||
| -rw-r--r-- | drivers/i2c/chips/pcf8575.c | 198 | ||||
| -rw-r--r-- | drivers/i2c/chips/tsl2550.c | 42 |
6 files changed, 10 insertions, 648 deletions
diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig index 02d746c9c47..f9618f4d4e4 100644 --- a/drivers/i2c/chips/Kconfig +++ b/drivers/i2c/chips/Kconfig @@ -16,54 +16,6 @@ config DS1682 This driver can also be built as a module. If so, the module will be called ds1682. -config SENSORS_PCF8574 - tristate "Philips PCF8574 and PCF8574A (DEPRECATED)" - depends on EXPERIMENTAL && GPIO_PCF857X = "n" - default n - help - If you say yes here you get support for Philips PCF8574 and - PCF8574A chips. These chips are 8-bit I/O expanders for the I2C bus. - - This driver can also be built as a module. If so, the module - will be called pcf8574. - - This driver is deprecated and will be dropped soon. Use - drivers/gpio/pcf857x.c instead. - - These devices are hard to detect and rarely found on mainstream - hardware. If unsure, say N. - -config PCF8575 - tristate "Philips PCF8575 (DEPRECATED)" - default n - depends on GPIO_PCF857X = "n" - help - If you say yes here you get support for Philips PCF8575 chip. - This chip is a 16-bit I/O expander for the I2C bus. Several other - chip manufacturers sell equivalent chips, e.g. Texas Instruments. - - This driver can also be built as a module. If so, the module - will be called pcf8575. - - This driver is deprecated and will be dropped soon. Use - drivers/gpio/pcf857x.c instead. - - This device is hard to detect and is rarely found on mainstream - hardware. If unsure, say N. - -config SENSORS_PCA9539 - tristate "Philips PCA9539 16-bit I/O port (DEPRECATED)" - depends on EXPERIMENTAL && GPIO_PCA953X = "n" - help - If you say yes here you get support for the Philips PCA9539 - 16-bit I/O port. - - This driver can also be built as a module. If so, the module - will be called pca9539. - - This driver is deprecated and will be dropped soon. Use - drivers/gpio/pca953x.c instead. - config SENSORS_TSL2550 tristate "Taos TSL2550 ambient light sensor" depends on EXPERIMENTAL diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile index f4680d16ee3..749cf360629 100644 --- a/drivers/i2c/chips/Makefile +++ b/drivers/i2c/chips/Makefile @@ -11,9 +11,6 @@ # obj-$(CONFIG_DS1682) += ds1682.o -obj-$(CONFIG_SENSORS_PCA9539) += pca9539.o -obj-$(CONFIG_SENSORS_PCF8574) += pcf8574.o -obj-$(CONFIG_PCF8575) += pcf8575.o obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o ifeq ($(CONFIG_I2C_DEBUG_CHIP),y) diff --git a/drivers/i2c/chips/pca9539.c b/drivers/i2c/chips/pca9539.c deleted file mode 100644 index 270de4e56a8..00000000000 --- a/drivers/i2c/chips/pca9539.c +++ /dev/null @@ -1,152 +0,0 @@ -/* - pca9539.c - 16-bit I/O port with interrupt and reset - - Copyright (C) 2005 Ben Gardner <bgardner@wabtec.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; version 2 of the License. -*/ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/hwmon-sysfs.h> - -/* Addresses to scan: none, device is not autodetected */ -static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -/* Insmod parameters */ -I2C_CLIENT_INSMOD_1(pca9539); - -enum pca9539_cmd -{ - PCA9539_INPUT_0 = 0, - PCA9539_INPUT_1 = 1, - PCA9539_OUTPUT_0 = 2, - PCA9539_OUTPUT_1 = 3, - PCA9539_INVERT_0 = 4, - PCA9539_INVERT_1 = 5, - PCA9539_DIRECTION_0 = 6, - PCA9539_DIRECTION_1 = 7, -}; - -/* following are the sysfs callback functions */ -static ssize_t pca9539_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct sensor_device_attribute *psa = to_sensor_dev_attr(attr); - struct i2c_client *client = to_i2c_client(dev); - return sprintf(buf, "%d\n", i2c_smbus_read_byte_data(client, - psa->index)); -} - -static ssize_t pca9539_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct sensor_device_attribute *psa = to_sensor_dev_attr(attr); - struct i2c_client *client = to_i2c_client(dev); - unsigned long val = simple_strtoul(buf, NULL, 0); - if (val > 0xff) - return -EINVAL; - i2c_smbus_write_byte_data(client, psa->index, val); - return count; -} - -/* Define the device attributes */ - -#define PCA9539_ENTRY_RO(name, cmd_idx) \ - static SENSOR_DEVICE_ATTR(name, S_IRUGO, pca9539_show, NULL, cmd_idx) - -#define PCA9539_ENTRY_RW(name, cmd_idx) \ - static SENSOR_DEVICE_ATTR(name, S_IRUGO | S_IWUSR, pca9539_show, \ - pca9539_store, cmd_idx) - -PCA9539_ENTRY_RO(input0, PCA9539_INPUT_0); -PCA9539_ENTRY_RO(input1, PCA9539_INPUT_1); -PCA9539_ENTRY_RW(output0, PCA9539_OUTPUT_0); -PCA9539_ENTRY_RW(output1, PCA9539_OUTPUT_1); -PCA9539_ENTRY_RW(invert0, PCA9539_INVERT_0); -PCA9539_ENTRY_RW(invert1, PCA9539_INVERT_1); -PCA9539_ENTRY_RW(direction0, PCA9539_DIRECTION_0); -PCA9539_ENTRY_RW(direction1, PCA9539_DIRECTION_1); - -static struct attribute *pca9539_attributes[] = { - &sensor_dev_attr_input0.dev_attr.attr, - &sensor_dev_attr_input1.dev_attr.attr, - &sensor_dev_attr_output0.dev_attr.attr, - &sensor_dev_attr_output1.dev_attr.attr, - &sensor_dev_attr_invert0.dev_attr.attr, - &sensor_dev_attr_invert1.dev_attr.attr, - &sensor_dev_attr_direction0.dev_attr.attr, - &sensor_dev_attr_direction1.dev_attr.attr, - NULL -}; - -static struct attribute_group pca9539_defattr_group = { - .attrs = pca9539_attributes, -}; - -/* Return 0 if detection is successful, -ENODEV otherwise */ -static int pca9539_detect(struct i2c_client *client, int kind, - struct i2c_board_info *info) -{ - struct i2c_adapter *adapter = client->adapter; - - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - return -ENODEV; - - strlcpy(info->type, "pca9539", I2C_NAME_SIZE); - - return 0; -} - -static int pca9539_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - /* Register sysfs hooks */ - return sysfs_create_group(&client->dev.kobj, - &pca9539_defattr_group); -} - -static int pca9539_remove(struct i2c_client *client) -{ - sysfs_remove_group(&client->dev.kobj, &pca9539_defattr_group); - return 0; -} - -static const struct i2c_device_id pca9539_id[] = { - { "pca9539", 0 }, - { } -}; - -static struct i2c_driver pca9539_driver = { - .driver = { - .name = "pca9539", - }, - .probe = pca9539_probe, - .remove = pca9539_remove, - .id_table = pca9539_id, - - .detect = pca9539_detect, - .address_data = &addr_data, -}; - -static int __init pca9539_init(void) -{ - return i2c_add_driver(&pca9539_driver); -} - -static void __exit pca9539_exit(void) -{ - i2c_del_driver(&pca9539_driver); -} - -MODULE_AUTHOR("Ben Gardner <bgardner@wabtec.com>"); -MODULE_DESCRIPTION("PCA9539 driver"); -MODULE_LICENSE("GPL"); - -module_init(pca9539_init); -module_exit(pca9539_exit); - diff --git a/drivers/i2c/chips/pcf8574.c b/drivers/i2c/chips/pcf8574.c deleted file mode 100644 index 6ec309894c8..00000000000 --- a/drivers/i2c/chips/pcf8574.c +++ /dev/null @@ -1,215 +0,0 @@ -/* - Copyright (c) 2000 Frodo Looijaard <frodol@dds.nl>, - Philip Edelbrock <phil@netroedge.com>, - Dan Eaton <dan.eaton@rocketlogix.com> - Ported to Linux 2.6 by Aurelien Jarno <aurel32@debian.org> with - the help of Jean Delvare <khali@linux-fr.org> - - 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. -*/ - -/* A few notes about the PCF8574: - -* The PCF8574 is an 8-bit I/O expander for the I2C bus produced by - Philips Semiconductors. It is designed to provide a byte I2C - interface to up to 8 separate devices. - -* The PCF8574 appears as a very simple SMBus device which can be - read from or written to with SMBUS byte read/write accesses. - - --Dan - -*/ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/i2c.h> - -/* Addresses to scan: none, device can't be detected */ -static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -/* Insmod parameters */ -I2C_CLIENT_INSMOD_2(pcf8574, pcf8574a); - -/* Each client has this additional data */ -struct pcf8574_data { - int write; /* Remember last written value */ -}; - -static void pcf8574_init_client(struct i2c_client *client); - -/* following are the sysfs callback functions */ -static ssize_t show_read(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - return sprintf(buf, "%u\n", i2c_smbus_read_byte(client)); -} - -static DEVICE_ATTR(read, S_IRUGO, show_read, NULL); - -static ssize_t show_write(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct pcf8574_data *data = i2c_get_clientdata(to_i2c_client(dev)); - - if (data->write < 0) - return data->write; - - return sprintf(buf, "%d\n", data->write); -} - -static ssize_t set_write(struct device *dev, struct device_attribute *attr, const char *buf, - size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - struct pcf8574_data *data = i2c_get_clientdata(client); - unsigned long val = simple_strtoul(buf, NULL, 10); - - if (val > 0xff) - return -EINVAL; - - data->write = val; - i2c_smbus_write_byte(client, data->write); - return count; -} - -static DEVICE_ATTR(write, S_IWUSR | S_IRUGO, show_write, set_write); - -static struct attribute *pcf8574_attributes[] = { - &dev_attr_read.attr, - &dev_attr_write.attr, - NULL -}; - -static const struct attribute_group pcf8574_attr_group = { - .attrs = pcf8574_attributes, -}; - -/* - * Real code - */ - -/* Return 0 if detection is successful, -ENODEV otherwise */ -static int pcf8574_detect(struct i2c_client *client, int kind, - struct i2c_board_info *info) -{ - struct i2c_adapter *adapter = client->adapter; - const char *client_name; - - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) - return -ENODEV; - - /* Now, we would do the remaining detection. But the PCF8574 is plainly - impossible to detect! Stupid chip. */ - - /* Determine the chip type */ - if (kind <= 0) { - if (client->addr >= 0x38 && client->addr <= 0x3f) - kind = pcf8574a; - else - kind = pcf8574; - } - - if (kind == pcf8574a) - client_name = "pcf8574a"; - else - client_name = "pcf8574"; - strlcpy(info->type, client_name, I2C_NAME_SIZE); - - return 0; -} - -static int pcf8574_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct pcf8574_data *data; - int err; - - data = kzalloc(sizeof(struct pcf8574_data), GFP_KERNEL); - if (!data) { - err = -ENOMEM; - goto exit; - } - - i2c_set_clientdata(client, data); - - /* Initialize the PCF8574 chip */ - pcf8574_init_client(client); - - /* Register sysfs hooks */ - err = sysfs_create_group(&client->dev.kobj, &pcf8574_attr_group); - if (err) - goto exit_free; - return 0; - - exit_free: - kfree(data); - exit: - return err; -} - -static int pcf8574_remove(struct i2c_client *client) -{ - sysfs_remove_group(&client->dev.kobj, &pcf8574_attr_group); - kfree(i2c_get_clientdata(client)); - return 0; -} - -/* Called when we have found a new PCF8574. */ -static void pcf8574_init_client(struct i2c_client *client) -{ - struct pcf8574_data *data = i2c_get_clientdata(client); - data->write = -EAGAIN; -} - -static const struct i2c_device_id pcf8574_id[] = { - { "pcf8574", 0 }, - { "pcf8574a", 0 }, - { } -}; - -static struct i2c_driver pcf8574_driver = { - .driver = { - .name = "pcf8574", - }, - .probe = pcf8574_probe, - .remove = pcf8574_remove, - .id_table = pcf8574_id, - - .detect = pcf8574_detect, - .address_data = &addr_data, -}; - -static int __init pcf8574_init(void) -{ - return i2c_add_driver(&pcf8574_driver); -} - -static void __exit pcf8574_exit(void) -{ - i2c_del_driver(&pcf8574_driver); -} - - -MODULE_AUTHOR - ("Frodo Looijaard <frodol@dds.nl>, " - "Philip Edelbrock <phil@netroedge.com>, " - "Dan Eaton <dan.eaton@rocketlogix.com> " - "and Aurelien Jarno <aurelien@aurel32.net>"); -MODULE_DESCRIPTION("PCF8574 driver"); -MODULE_LICENSE("GPL"); - -module_init(pcf8574_init); -module_exit(pcf8574_exit); diff --git a/drivers/i2c/chips/pcf8575.c b/drivers/i2c/chips/pcf8575.c deleted file mode 100644 index 07fd7cb3c57..00000000000 --- a/drivers/i2c/chips/pcf8575.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - pcf8575.c - - About the PCF8575 chip: the PCF8575 is a 16-bit I/O expander for the I2C bus - produced by a.o. Philips Semiconductors. - - Copyright (C) 2006 Michael Hennerich, Analog Devices Inc. - <hennerich@blackfin.uclinux.org> - Based on pcf8574.c. - - Copyright (c) 2007 Bart Van Assche <bart.vanassche@gmail.com>. - Ported this driver from ucLinux to the mainstream Linux kernel. - - 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. -*/ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/slab.h> /* kzalloc() */ -#include <linux/sysfs.h> /* sysfs_create_group() */ - -/* Addresses to scan: none, device can't be detected */ -static const unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -/* Insmod parameters */ -I2C_CLIENT_INSMOD; - - -/* Each client has this additional data */ -struct pcf8575_data { - int write; /* last written value, or error code */ -}; - -/* following are the sysfs callback functions */ -static ssize_t show_read(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - u16 val; - u8 iopin_state[2]; - - i2c_master_recv(client, iopin_state, 2); - - val = iopin_state[0]; - val |= iopin_state[1] << 8; - - return sprintf(buf, "%u\n", val); -} - -static DEVICE_ATTR(read, S_IRUGO, show_read, NULL); - -static ssize_t show_write(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct pcf8575_data *data = dev_get_drvdata(dev); - if (data->write < 0) - return data->write; - return sprintf(buf, "%d\n", data->write); -} - -static ssize_t set_write(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - struct pcf8575_data *data = i2c_get_clientdata(client); - unsigned long val = simple_strtoul(buf, NULL, 10); - u8 iopin_state[2]; - - if (val > 0xffff) - return -EINVAL; - - data->write = val; - - iopin_state[0] = val & 0xFF; - iopin_state[1] = val >> 8; - - i2c_master_send(client, iopin_state, 2); - - return count; -} - -static DEVICE_ATTR(write, S_IWUSR | S_IRUGO, show_write, set_write); - -static struct attribute *pcf8575_attributes[] = { - &dev_attr_read.attr, - &dev_attr_write.attr, - NULL -}; - -static const struct attribute_group pcf8575_attr_group = { - .attrs = pcf8575_attributes, -}; - -/* - * Real code - */ - -/* Return 0 if detection is successful, -ENODEV otherwise */ -static int pcf8575_detect(struct i2c_client *client, int kind, - struct i2c_board_info *info) -{ - struct i2c_adapter *adapter = client->adapter; - - if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) - return -ENODEV; - - /* This is the place to detect whether the chip at the specified - address really is a PCF8575 chip. However, there is no method known - to detect whether an I2C chip is a PCF8575 or any other I2C chip. */ - - strlcpy(info->type, "pcf8575", I2C_NAME_SIZE); - - return 0; -} - -static int pcf8575_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct pcf8575_data *data; - int err; - - data = kzalloc(sizeof(struct pcf8575_data), GFP_KERNEL); - if (!data) { - err = -ENOMEM; - goto exit; - } - - i2c_set_clientdata(client, data); - data->write = -EAGAIN; - - /* Register sysfs hooks */ - err = sysfs_create_group(&client->dev.kobj, &pcf8575_attr_group); - if (err) - goto exit_free; - - return 0; - -exit_free: - kfree(data); -exit: - return err; -} - -static int pcf8575_remove(struct i2c_client *client) -{ - sysfs_remove_group(&client->dev.kobj, &pcf8575_attr_group); - kfree(i2c_get_clientdata(client)); - return 0; -} - -static const struct i2c_device_id pcf8575_id[] = { - { "pcf8575", 0 }, - { } -}; - -static struct i2c_driver pcf8575_driver = { - .driver = { - .owner = THIS_MODULE, - .name = "pcf8575", - }, - .probe = pcf8575_probe, - .remove = pcf8575_remove, - .id_table = pcf8575_id, - - .detect = pcf8575_detect, - .address_data = &addr_data, -}; - -static int __init pcf8575_init(void) -{ - return i2c_add_driver(&pcf8575_driver); -} - -static void __exit pcf8575_exit(void) -{ - i2c_del_driver(&pcf8575_driver); -} - -MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>, " - "Bart Van Assche <bart.vanassche@gmail.com>"); -MODULE_DESCRIPTION("pcf8575 driver"); -MODULE_LICENSE("GPL"); - -module_init(pcf8575_init); -module_exit(pcf8575_exit); diff --git a/drivers/i2c/chips/tsl2550.c b/drivers/i2c/chips/tsl2550.c index b96f3025e58..aa96bd2d27e 100644 --- a/drivers/i2c/chips/tsl2550.c +++ b/drivers/i2c/chips/tsl2550.c @@ -24,10 +24,9 @@ #include <linux/slab.h> #include <linux/i2c.h> #include <linux/mutex.h> -#include <linux/delay.h> #define TSL2550_DRV_NAME "tsl2550" -#define DRIVER_VERSION "1.1.2" +#define DRIVER_VERSION "1.2" /* * Defines @@ -96,32 +95,13 @@ static int tsl2550_set_power_state(struct i2c_client *client, int state) static int tsl2550_get_adc_value(struct i2c_client *client, u8 cmd) { - unsigned long end; - int loop = 0, ret = 0; + int ret; - /* - * Read ADC channel waiting at most 400ms (see data sheet for further - * info). - * To avoid long busy wait we spin for few milliseconds then - * start sleeping. - */ - end = jiffies + msecs_to_jiffies(400); - while (time_before(jiffies, end)) { - i2c_smbus_write_byte(client, cmd); - - if (loop++ < 5) - mdelay(1); - else - msleep(1); - - ret = i2c_smbus_read_byte(client); - if (ret < 0) - return ret; - else if (ret & 0x0080) - break; - } + ret = i2c_smbus_read_byte_data(client, cmd); + if (ret < 0) + return ret; if (!(ret & 0x80)) - return -EIO; + return -EAGAIN; return ret & 0x7f; /* remove the "valid" bit */ } @@ -285,8 +265,6 @@ static ssize_t __tsl2550_show_lux(struct i2c_client *client, char *buf) return ret; ch0 = ret; - mdelay(1); - ret = tsl2550_get_adc_value(client, TSL2550_READ_ADC1); if (ret < 0) return ret; @@ -345,11 +323,10 @@ static int tsl2550_init_client(struct i2c_client *client) * Probe the chip. To do so we try to power up the device and then to * read back the 0x03 code */ - err = i2c_smbus_write_byte(client, TSL2550_POWER_UP); + err = i2c_smbus_read_byte_data(client, TSL2550_POWER_UP); if (err < 0) return err; - mdelay(1); - if (i2c_smbus_read_byte(client) != TSL2550_POWER_UP) + if (err != TSL2550_POWER_UP) return -ENODEV; data->power_state = 1; @@ -374,7 +351,8 @@ static int __devinit tsl2550_probe(struct i2c_client *client, struct tsl2550_data *data; int *opmode, err = 0; - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) { + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE + | I2C_FUNC_SMBUS_READ_BYTE_DATA)) { err = -EIO; goto exit; } |