From: Wolfram Sang Date: Sun, 6 Dec 2009 16:06:16 +0000 (+0100) Subject: i2c/chips: Move ds1682 to drivers/misc X-Git-Tag: v2.6.33-rc1~385^2~18 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=dddc66ffa048fbc842f5de385031f1826649ffc2;p=~shefty%2Frdma-dev.git i2c/chips: Move ds1682 to drivers/misc As i2c/chips is deprecated, move ds1682 to a more apropriate location. Build tested. Signed-off-by: Wolfram Sang Acked-by: Grant Likely Signed-off-by: Jean Delvare --- diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig index f9618f4d4e4..ae4539d99be 100644 --- a/drivers/i2c/chips/Kconfig +++ b/drivers/i2c/chips/Kconfig @@ -6,16 +6,6 @@ menu "Miscellaneous I2C Chip support" -config DS1682 - tristate "Dallas DS1682 Total Elapsed Time Recorder with Alarm" - depends on EXPERIMENTAL - help - If you say yes here you get support for Dallas Semiconductor - DS1682 Total Elapsed Time Recorder. - - This driver can also be built as a module. If so, the module - will be called ds1682. - 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 749cf360629..fe0af0f81f2 100644 --- a/drivers/i2c/chips/Makefile +++ b/drivers/i2c/chips/Makefile @@ -10,7 +10,6 @@ # * I/O expander drivers go to drivers/gpio # -obj-$(CONFIG_DS1682) += ds1682.o obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o ifeq ($(CONFIG_I2C_DEBUG_CHIP),y) diff --git a/drivers/i2c/chips/ds1682.c b/drivers/i2c/chips/ds1682.c deleted file mode 100644 index f3ee4a1abb7..00000000000 --- a/drivers/i2c/chips/ds1682.c +++ /dev/null @@ -1,267 +0,0 @@ -/* - * Dallas Semiconductor DS1682 Elapsed Time Recorder device driver - * - * Written by: Grant Likely - * - * Copyright (C) 2007 Secret Lab Technologies Ltd. - * - * 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. - */ - -/* - * The DS1682 elapsed timer recorder is a simple device that implements - * one elapsed time counter, one event counter, an alarm signal and 10 - * bytes of general purpose EEPROM. - * - * This driver provides access to the DS1682 counters and user data via - * the sysfs. The following attributes are added to the device node: - * elapsed_time (u32): Total elapsed event time in ms resolution - * alarm_time (u32): When elapsed time exceeds the value in alarm_time, - * then the alarm pin is asserted. - * event_count (u16): number of times the event pin has gone low. - * eeprom (u8[10]): general purpose EEPROM - * - * Counter registers and user data are both read/write unless the device - * has been write protected. This driver does not support turning off write - * protection. Once write protection is turned on, it is impossible to - * turn it off again, so I have left the feature out of this driver to avoid - * accidental enabling, but it is trivial to add write protect support. - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/* Device registers */ -#define DS1682_REG_CONFIG 0x00 -#define DS1682_REG_ALARM 0x01 -#define DS1682_REG_ELAPSED 0x05 -#define DS1682_REG_EVT_CNTR 0x09 -#define DS1682_REG_EEPROM 0x0b -#define DS1682_REG_RESET 0x1d -#define DS1682_REG_WRITE_DISABLE 0x1e -#define DS1682_REG_WRITE_MEM_DISABLE 0x1f - -#define DS1682_EEPROM_SIZE 10 - -/* - * Generic counter attributes - */ -static ssize_t ds1682_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); - struct i2c_client *client = to_i2c_client(dev); - __le32 val = 0; - int rc; - - dev_dbg(dev, "ds1682_show() called on %s\n", attr->attr.name); - - /* Read the register */ - rc = i2c_smbus_read_i2c_block_data(client, sattr->index, sattr->nr, - (u8 *) & val); - if (rc < 0) - return -EIO; - - /* Special case: the 32 bit regs are time values with 1/4s - * resolution, scale them up to milliseconds */ - if (sattr->nr == 4) - return sprintf(buf, "%llu\n", - ((unsigned long long)le32_to_cpu(val)) * 250); - - /* Format the output string and return # of bytes */ - return sprintf(buf, "%li\n", (long)le32_to_cpu(val)); -} - -static ssize_t ds1682_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); - struct i2c_client *client = to_i2c_client(dev); - char *endp; - u64 val; - __le32 val_le; - int rc; - - dev_dbg(dev, "ds1682_store() called on %s\n", attr->attr.name); - - /* Decode input */ - val = simple_strtoull(buf, &endp, 0); - if (buf == endp) { - dev_dbg(dev, "input string not a number\n"); - return -EINVAL; - } - - /* Special case: the 32 bit regs are time values with 1/4s - * resolution, scale input down to quarter-seconds */ - if (sattr->nr == 4) - do_div(val, 250); - - /* write out the value */ - val_le = cpu_to_le32(val); - rc = i2c_smbus_write_i2c_block_data(client, sattr->index, sattr->nr, - (u8 *) & val_le); - if (rc < 0) { - dev_err(dev, "register write failed; reg=0x%x, size=%i\n", - sattr->index, sattr->nr); - return -EIO; - } - - return count; -} - -/* - * Simple register attributes - */ -static SENSOR_DEVICE_ATTR_2(elapsed_time, S_IRUGO | S_IWUSR, ds1682_show, - ds1682_store, 4, DS1682_REG_ELAPSED); -static SENSOR_DEVICE_ATTR_2(alarm_time, S_IRUGO | S_IWUSR, ds1682_show, - ds1682_store, 4, DS1682_REG_ALARM); -static SENSOR_DEVICE_ATTR_2(event_count, S_IRUGO | S_IWUSR, ds1682_show, - ds1682_store, 2, DS1682_REG_EVT_CNTR); - -static const struct attribute_group ds1682_group = { - .attrs = (struct attribute *[]) { - &sensor_dev_attr_elapsed_time.dev_attr.attr, - &sensor_dev_attr_alarm_time.dev_attr.attr, - &sensor_dev_attr_event_count.dev_attr.attr, - NULL, - }, -}; - -/* - * User data attribute - */ -static ssize_t ds1682_eeprom_read(struct kobject *kobj, struct bin_attribute *attr, - char *buf, loff_t off, size_t count) -{ - struct i2c_client *client = kobj_to_i2c_client(kobj); - int rc; - - dev_dbg(&client->dev, "ds1682_eeprom_read(p=%p, off=%lli, c=%zi)\n", - buf, off, count); - - if (off >= DS1682_EEPROM_SIZE) - return 0; - - if (off + count > DS1682_EEPROM_SIZE) - count = DS1682_EEPROM_SIZE - off; - - rc = i2c_smbus_read_i2c_block_data(client, DS1682_REG_EEPROM + off, - count, buf); - if (rc < 0) - return -EIO; - - return count; -} - -static ssize_t ds1682_eeprom_write(struct kobject *kobj, struct bin_attribute *attr, - char *buf, loff_t off, size_t count) -{ - struct i2c_client *client = kobj_to_i2c_client(kobj); - - dev_dbg(&client->dev, "ds1682_eeprom_write(p=%p, off=%lli, c=%zi)\n", - buf, off, count); - - if (off >= DS1682_EEPROM_SIZE) - return -ENOSPC; - - if (off + count > DS1682_EEPROM_SIZE) - count = DS1682_EEPROM_SIZE - off; - - /* Write out to the device */ - if (i2c_smbus_write_i2c_block_data(client, DS1682_REG_EEPROM + off, - count, buf) < 0) - return -EIO; - - return count; -} - -static struct bin_attribute ds1682_eeprom_attr = { - .attr = { - .name = "eeprom", - .mode = S_IRUGO | S_IWUSR, - }, - .size = DS1682_EEPROM_SIZE, - .read = ds1682_eeprom_read, - .write = ds1682_eeprom_write, -}; - -/* - * Called when a ds1682 device is matched with this driver - */ -static int ds1682_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int rc; - - if (!i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_I2C_BLOCK)) { - dev_err(&client->dev, "i2c bus does not support the ds1682\n"); - rc = -ENODEV; - goto exit; - } - - rc = sysfs_create_group(&client->dev.kobj, &ds1682_group); - if (rc) - goto exit; - - rc = sysfs_create_bin_file(&client->dev.kobj, &ds1682_eeprom_attr); - if (rc) - goto exit_bin_attr; - - return 0; - - exit_bin_attr: - sysfs_remove_group(&client->dev.kobj, &ds1682_group); - exit: - return rc; -} - -static int ds1682_remove(struct i2c_client *client) -{ - sysfs_remove_bin_file(&client->dev.kobj, &ds1682_eeprom_attr); - sysfs_remove_group(&client->dev.kobj, &ds1682_group); - return 0; -} - -static const struct i2c_device_id ds1682_id[] = { - { "ds1682", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, ds1682_id); - -static struct i2c_driver ds1682_driver = { - .driver = { - .name = "ds1682", - }, - .probe = ds1682_probe, - .remove = ds1682_remove, - .id_table = ds1682_id, -}; - -static int __init ds1682_init(void) -{ - return i2c_add_driver(&ds1682_driver); -} - -static void __exit ds1682_exit(void) -{ - i2c_del_driver(&ds1682_driver); -} - -MODULE_AUTHOR("Grant Likely "); -MODULE_DESCRIPTION("DS1682 Elapsed Time Indicator driver"); -MODULE_LICENSE("GPL"); - -module_init(ds1682_init); -module_exit(ds1682_exit); diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index df1f86b5c83..498ab3ebd44 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -246,6 +246,16 @@ config EP93XX_PWM To compile this driver as a module, choose M here: the module will be called ep93xx_pwm. +config DS1682 + tristate "Dallas DS1682 Total Elapsed Time Recorder with Alarm" + depends on I2C && EXPERIMENTAL + help + If you say yes here you get support for Dallas Semiconductor + DS1682 Total Elapsed Time Recorder. + + This driver can also be built as a module. If so, the module + will be called ds1682. + source "drivers/misc/c2port/Kconfig" source "drivers/misc/eeprom/Kconfig" source "drivers/misc/cb710/Kconfig" diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index f982d2ecfde..b6245e46e28 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_SGI_GRU) += sgi-gru/ obj-$(CONFIG_HP_ILO) += hpilo.o obj-$(CONFIG_ISL29003) += isl29003.o obj-$(CONFIG_EP93XX_PWM) += ep93xx_pwm.o +obj-$(CONFIG_DS1682) += ds1682.o obj-$(CONFIG_C2PORT) += c2port/ obj-y += eeprom/ obj-y += cb710/ diff --git a/drivers/misc/ds1682.c b/drivers/misc/ds1682.c new file mode 100644 index 00000000000..f3ee4a1abb7 --- /dev/null +++ b/drivers/misc/ds1682.c @@ -0,0 +1,267 @@ +/* + * Dallas Semiconductor DS1682 Elapsed Time Recorder device driver + * + * Written by: Grant Likely + * + * Copyright (C) 2007 Secret Lab Technologies Ltd. + * + * 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. + */ + +/* + * The DS1682 elapsed timer recorder is a simple device that implements + * one elapsed time counter, one event counter, an alarm signal and 10 + * bytes of general purpose EEPROM. + * + * This driver provides access to the DS1682 counters and user data via + * the sysfs. The following attributes are added to the device node: + * elapsed_time (u32): Total elapsed event time in ms resolution + * alarm_time (u32): When elapsed time exceeds the value in alarm_time, + * then the alarm pin is asserted. + * event_count (u16): number of times the event pin has gone low. + * eeprom (u8[10]): general purpose EEPROM + * + * Counter registers and user data are both read/write unless the device + * has been write protected. This driver does not support turning off write + * protection. Once write protection is turned on, it is impossible to + * turn it off again, so I have left the feature out of this driver to avoid + * accidental enabling, but it is trivial to add write protect support. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Device registers */ +#define DS1682_REG_CONFIG 0x00 +#define DS1682_REG_ALARM 0x01 +#define DS1682_REG_ELAPSED 0x05 +#define DS1682_REG_EVT_CNTR 0x09 +#define DS1682_REG_EEPROM 0x0b +#define DS1682_REG_RESET 0x1d +#define DS1682_REG_WRITE_DISABLE 0x1e +#define DS1682_REG_WRITE_MEM_DISABLE 0x1f + +#define DS1682_EEPROM_SIZE 10 + +/* + * Generic counter attributes + */ +static ssize_t ds1682_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct i2c_client *client = to_i2c_client(dev); + __le32 val = 0; + int rc; + + dev_dbg(dev, "ds1682_show() called on %s\n", attr->attr.name); + + /* Read the register */ + rc = i2c_smbus_read_i2c_block_data(client, sattr->index, sattr->nr, + (u8 *) & val); + if (rc < 0) + return -EIO; + + /* Special case: the 32 bit regs are time values with 1/4s + * resolution, scale them up to milliseconds */ + if (sattr->nr == 4) + return sprintf(buf, "%llu\n", + ((unsigned long long)le32_to_cpu(val)) * 250); + + /* Format the output string and return # of bytes */ + return sprintf(buf, "%li\n", (long)le32_to_cpu(val)); +} + +static ssize_t ds1682_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct i2c_client *client = to_i2c_client(dev); + char *endp; + u64 val; + __le32 val_le; + int rc; + + dev_dbg(dev, "ds1682_store() called on %s\n", attr->attr.name); + + /* Decode input */ + val = simple_strtoull(buf, &endp, 0); + if (buf == endp) { + dev_dbg(dev, "input string not a number\n"); + return -EINVAL; + } + + /* Special case: the 32 bit regs are time values with 1/4s + * resolution, scale input down to quarter-seconds */ + if (sattr->nr == 4) + do_div(val, 250); + + /* write out the value */ + val_le = cpu_to_le32(val); + rc = i2c_smbus_write_i2c_block_data(client, sattr->index, sattr->nr, + (u8 *) & val_le); + if (rc < 0) { + dev_err(dev, "register write failed; reg=0x%x, size=%i\n", + sattr->index, sattr->nr); + return -EIO; + } + + return count; +} + +/* + * Simple register attributes + */ +static SENSOR_DEVICE_ATTR_2(elapsed_time, S_IRUGO | S_IWUSR, ds1682_show, + ds1682_store, 4, DS1682_REG_ELAPSED); +static SENSOR_DEVICE_ATTR_2(alarm_time, S_IRUGO | S_IWUSR, ds1682_show, + ds1682_store, 4, DS1682_REG_ALARM); +static SENSOR_DEVICE_ATTR_2(event_count, S_IRUGO | S_IWUSR, ds1682_show, + ds1682_store, 2, DS1682_REG_EVT_CNTR); + +static const struct attribute_group ds1682_group = { + .attrs = (struct attribute *[]) { + &sensor_dev_attr_elapsed_time.dev_attr.attr, + &sensor_dev_attr_alarm_time.dev_attr.attr, + &sensor_dev_attr_event_count.dev_attr.attr, + NULL, + }, +}; + +/* + * User data attribute + */ +static ssize_t ds1682_eeprom_read(struct kobject *kobj, struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + struct i2c_client *client = kobj_to_i2c_client(kobj); + int rc; + + dev_dbg(&client->dev, "ds1682_eeprom_read(p=%p, off=%lli, c=%zi)\n", + buf, off, count); + + if (off >= DS1682_EEPROM_SIZE) + return 0; + + if (off + count > DS1682_EEPROM_SIZE) + count = DS1682_EEPROM_SIZE - off; + + rc = i2c_smbus_read_i2c_block_data(client, DS1682_REG_EEPROM + off, + count, buf); + if (rc < 0) + return -EIO; + + return count; +} + +static ssize_t ds1682_eeprom_write(struct kobject *kobj, struct bin_attribute *attr, + char *buf, loff_t off, size_t count) +{ + struct i2c_client *client = kobj_to_i2c_client(kobj); + + dev_dbg(&client->dev, "ds1682_eeprom_write(p=%p, off=%lli, c=%zi)\n", + buf, off, count); + + if (off >= DS1682_EEPROM_SIZE) + return -ENOSPC; + + if (off + count > DS1682_EEPROM_SIZE) + count = DS1682_EEPROM_SIZE - off; + + /* Write out to the device */ + if (i2c_smbus_write_i2c_block_data(client, DS1682_REG_EEPROM + off, + count, buf) < 0) + return -EIO; + + return count; +} + +static struct bin_attribute ds1682_eeprom_attr = { + .attr = { + .name = "eeprom", + .mode = S_IRUGO | S_IWUSR, + }, + .size = DS1682_EEPROM_SIZE, + .read = ds1682_eeprom_read, + .write = ds1682_eeprom_write, +}; + +/* + * Called when a ds1682 device is matched with this driver + */ +static int ds1682_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int rc; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_I2C_BLOCK)) { + dev_err(&client->dev, "i2c bus does not support the ds1682\n"); + rc = -ENODEV; + goto exit; + } + + rc = sysfs_create_group(&client->dev.kobj, &ds1682_group); + if (rc) + goto exit; + + rc = sysfs_create_bin_file(&client->dev.kobj, &ds1682_eeprom_attr); + if (rc) + goto exit_bin_attr; + + return 0; + + exit_bin_attr: + sysfs_remove_group(&client->dev.kobj, &ds1682_group); + exit: + return rc; +} + +static int ds1682_remove(struct i2c_client *client) +{ + sysfs_remove_bin_file(&client->dev.kobj, &ds1682_eeprom_attr); + sysfs_remove_group(&client->dev.kobj, &ds1682_group); + return 0; +} + +static const struct i2c_device_id ds1682_id[] = { + { "ds1682", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ds1682_id); + +static struct i2c_driver ds1682_driver = { + .driver = { + .name = "ds1682", + }, + .probe = ds1682_probe, + .remove = ds1682_remove, + .id_table = ds1682_id, +}; + +static int __init ds1682_init(void) +{ + return i2c_add_driver(&ds1682_driver); +} + +static void __exit ds1682_exit(void) +{ + i2c_del_driver(&ds1682_driver); +} + +MODULE_AUTHOR("Grant Likely "); +MODULE_DESCRIPTION("DS1682 Elapsed Time Indicator driver"); +MODULE_LICENSE("GPL"); + +module_init(ds1682_init); +module_exit(ds1682_exit);