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    Subject[PATCH] DS2781 Maxim Stand-Alone Fuel Gauge battery and w1 slave drivers
    Date

    Signed-off-by: Renata Sayakhova <rsayakhova@gmail.com>
    ---
    drivers/power/Kconfig | 14 +
    drivers/power/Makefile | 1 +
    drivers/power/ds2781_battery.c | 874 ++++++++++++++++++++++++++++++++++++++++
    drivers/w1/slaves/Kconfig | 13 +
    drivers/w1/slaves/Makefile | 1 +
    drivers/w1/slaves/w1_ds2781.c | 201 +++++++++
    drivers/w1/slaves/w1_ds2781.h | 136 +++++++
    drivers/w1/w1_family.h | 1 +
    8 files changed, 1241 insertions(+), 0 deletions(-)
    create mode 100644 drivers/power/ds2781_battery.c
    create mode 100644 drivers/w1/slaves/w1_ds2781.c
    create mode 100644 drivers/w1/slaves/w1_ds2781.h

    diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
    index 3a8daf8..459f664 100644
    --- a/drivers/power/Kconfig
    +++ b/drivers/power/Kconfig
    @@ -76,6 +76,20 @@ config BATTERY_DS2780
    help
    Say Y here to enable support for batteries with ds2780 chip.

    +config BATTERY_DS2781
    + tristate "2781 battery driver"
    + depends on HAS_IOMEM
    + select W1
    + select W1_SLAVE_DS2781
    + help
    + If you enable this you will have the DS2781 battery driver support.
    +
    + The battery monitor chip is used in many batteries/devices
    + as the one who is responsible for charging/discharging/monitoring
    + Li+ batteries.
    +
    + If you are unsure, say N.
    +
    config BATTERY_DS2782
    tristate "DS2782/DS2786 standalone gas-gauge"
    depends on I2C
    diff --git a/drivers/power/Makefile b/drivers/power/Makefile
    index e429008..c590fa5 100644
    --- a/drivers/power/Makefile
    +++ b/drivers/power/Makefile
    @@ -16,6 +16,7 @@ obj-$(CONFIG_TEST_POWER) += test_power.o

    obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
    obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o
    +obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o
    obj-$(CONFIG_BATTERY_DS2782) += ds2782_battery.o
    obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
    obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
    diff --git a/drivers/power/ds2781_battery.c b/drivers/power/ds2781_battery.c
    new file mode 100644
    index 0000000..ca0d653
    --- /dev/null
    +++ b/drivers/power/ds2781_battery.c
    @@ -0,0 +1,874 @@
    +/*
    + * 1-wire client/driver for the Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC
    + *
    + * Author: Renata Sayakhova <renata@oktetlabs.ru>
    + *
    + * Based on ds2780_battery drivers
    + *
    + * 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/slab.h>
    +#include <linux/param.h>
    +#include <linux/pm.h>
    +#include <linux/platform_device.h>
    +#include <linux/power_supply.h>
    +#include <linux/idr.h>
    +
    +#include "../w1/w1.h"
    +#include "../w1/slaves/w1_ds2781.h"
    +
    +/* Current unit measurement in uA for a 1 milli-ohm sense resistor */
    +#define DS2781_CURRENT_UNITS 1563
    +/* Charge unit measurement in uAh for a 1 milli-ohm sense resistor */
    +#define DS2781_CHARGE_UNITS 6250
    +/* Number of bytes in user EEPROM space */
    +#define DS2781_USER_EEPROM_SIZE (DS2781_EEPROM_BLOCK0_END - \
    + DS2781_EEPROM_BLOCK0_START + 1)
    +/* Number of bytes in parameter EEPROM space */
    +#define DS2781_PARAM_EEPROM_SIZE (DS2781_EEPROM_BLOCK1_END - \
    + DS2781_EEPROM_BLOCK1_START + 1)
    +
    +struct ds2781_device_info {
    + struct device *dev;
    + struct power_supply bat;
    + struct device *w1_dev;
    + struct task_struct *mutex_holder;
    +};
    +
    +enum current_types {
    + CURRENT_NOW,
    + CURRENT_AVG,
    +};
    +
    +static const char model[] = "DS2781";
    +static const char manufacturer[] = "Maxim/Dallas";
    +
    +static inline struct ds2781_device_info *
    +to_ds2781_device_info(struct power_supply *psy)
    +{
    + return container_of(psy, struct ds2781_device_info, bat);
    +}
    +
    +static inline struct power_supply *to_power_supply(struct device *dev)
    +{
    + return dev_get_drvdata(dev);
    +}
    +
    +static inline int ds2781_battery_io(struct ds2781_device_info *dev_info,
    + char *buf, int addr, size_t count, int io)
    +{
    + if (dev_info->mutex_holder == current)
    + return w1_ds2781_io_nolock(dev_info->w1_dev, buf, addr,
    + count, io);
    + else
    + return w1_ds2781_io(dev_info->w1_dev, buf, addr, count, io);
    +}
    +
    +int w1_ds2781_read(struct ds2781_device_info *dev_info, char *buf,
    + int addr, size_t count)
    +{
    + return ds2781_battery_io(dev_info, buf, addr, count, 0);
    +}
    +
    +static inline int ds2781_read8(struct ds2781_device_info *dev_info, u8 *val,
    + int addr)
    +{
    + return ds2781_battery_io(dev_info, val, addr, sizeof(u8), 0);
    +}
    +
    +static int ds2781_read16(struct ds2781_device_info *dev_info, s16 *val,
    + int addr)
    +{
    + int ret;
    + u8 raw[2];
    +
    + ret = ds2781_battery_io(dev_info, raw, addr, sizeof(raw), 0);
    + if (ret < 0)
    + return ret;
    +
    + *val = (raw[0] << 8) | raw[1];
    +
    + return 0;
    +}
    +
    +static inline int ds2781_read_block(struct ds2781_device_info *dev_info,
    + u8 *val, int addr, size_t count)
    +{
    + return ds2781_battery_io(dev_info, val, addr, count, 0);
    +}
    +
    +static inline int ds2781_write(struct ds2781_device_info *dev_info, u8 *val,
    + int addr, size_t count)
    +{
    + return ds2781_battery_io(dev_info, val, addr, count, 1);
    +}
    +
    +static inline int ds2781_store_eeprom(struct device *dev, int addr)
    +{
    + return w1_ds2781_eeprom_cmd(dev, addr, W1_DS2781_COPY_DATA);
    +}
    +
    +static inline int ds2781_recall_eeprom(struct device *dev, int addr)
    +{
    + return w1_ds2781_eeprom_cmd(dev, addr, W1_DS2781_RECALL_DATA);
    +}
    +
    +static int ds2781_save_eeprom(struct ds2781_device_info *dev_info, int reg)
    +{
    + int ret;
    +
    + ret = ds2781_store_eeprom(dev_info->w1_dev, reg);
    + if (ret < 0)
    + return ret;
    +
    + ret = ds2781_recall_eeprom(dev_info->w1_dev, reg);
    + if (ret < 0)
    + return ret;
    +
    + return 0;
    +}
    +
    +/* Set sense resistor value in mhos */
    +static int ds2781_set_sense_register(struct ds2781_device_info *dev_info,
    + u8 conductance)
    +{
    + int ret;
    +
    + ret = ds2781_write(dev_info, &conductance,
    + DS2781_RSNSP, sizeof(u8));
    + if (ret < 0)
    + return ret;
    +
    + return ds2781_save_eeprom(dev_info, DS2781_RSNSP);
    +}
    +
    +/* Get RSGAIN value from 0 to 1.999 in steps of 0.001 */
    +static int ds2781_get_rsgain_register(struct ds2781_device_info *dev_info,
    + u16 *rsgain)
    +{
    + return ds2781_read16(dev_info, rsgain, DS2781_RSGAIN_MSB);
    +}
    +
    +/* Set RSGAIN value from 0 to 1.999 in steps of 0.001 */
    +static int ds2781_set_rsgain_register(struct ds2781_device_info *dev_info,
    + u16 rsgain)
    +{
    + int ret;
    + u8 raw[] = {rsgain >> 8, rsgain & 0xFF};
    +
    + ret = ds2781_write(dev_info, raw,
    + DS2781_RSGAIN_MSB, sizeof(raw));
    + if (ret < 0)
    + return ret;
    +
    + return ds2781_save_eeprom(dev_info, DS2781_RSGAIN_MSB);
    +}
    +
    +static int ds2781_get_voltage(struct ds2781_device_info *dev_info,
    + int *voltage_uV)
    +{
    + int ret;
    + char val[2];
    + int voltage_raw;
    +
    + ret = w1_ds2781_read(dev_info, val, DS2781_VOLT_MSB, 2 * sizeof(u8));
    + if (ret < 0)
    + return ret;
    + /*
    + * The voltage value is located in 10 bits across the voltage MSB
    + * and LSB registers in two's compliment form
    + * Sign bit of the voltage value is in bit 7 of the voltage MSB register
    + * Bits 9 - 3 of the voltage value are in bits 6 - 0 of the
    + * voltage MSB register
    + * Bits 2 - 0 of the voltage value are in bits 7 - 5 of the
    + * voltage LSB register
    + */
    + voltage_raw = (val[0] << 3) |
    + (val[1] >> 5);
    +
    + /* DS2781 reports voltage in units of 9.76mV, but the battery class
    + * reports in units of uV, so convert by multiplying by 9760. */
    + *voltage_uV = voltage_raw * 9760;
    +
    + return 0;
    +}
    +
    +static int ds2781_get_temperature(struct ds2781_device_info *dev_info,
    + int *temp)
    +{
    + int ret;
    + char val[2];
    + int temp_raw;
    +
    + ret = w1_ds2781_read(dev_info, val, DS2781_TEMP_MSB, 2 * sizeof(u8));
    + if (ret < 0)
    + return ret;
    + /*
    + * The temperature value is located in 10 bits across the temperature
    + * MSB and LSB registers in two's compliment form
    + * Sign bit of the temperature value is in bit 7 of the temperature
    + * MSB register
    + * Bits 9 - 3 of the temperature value are in bits 6 - 0 of the
    + * temperature MSB register
    + * Bits 2 - 0 of the temperature value are in bits 7 - 5 of the
    + * temperature LSB register
    + */
    + temp_raw = ((val[0]) << 3) |
    + (val[1] >> 5);
    + *temp = temp_raw + (temp_raw / 4);
    +
    + return 0;
    +}
    +
    +static int ds2781_get_current(struct ds2781_device_info *dev_info,
    + enum current_types type, int *current_uA)
    +{
    + int ret, sense_res;
    + s16 current_raw;
    + u8 sense_res_raw, reg_msb;
    +
    + /*
    + * The units of measurement for current are dependent on the value of
    + * the sense resistor.
    + */
    + ret = ds2781_read8(dev_info, &sense_res_raw, DS2781_RSNSP);
    + if (ret < 0)
    + return ret;
    +
    + if (sense_res_raw == 0) {
    + dev_err(dev_info->dev, "sense resistor value is 0\n");
    + return -EINVAL;
    + }
    + sense_res = 1000 / sense_res_raw;
    +
    + if (type == CURRENT_NOW)
    + reg_msb = DS2781_CURRENT_MSB;
    + else if (type == CURRENT_AVG)
    + reg_msb = DS2781_IAVG_MSB;
    + else
    + return -EINVAL;
    +
    + /*
    + * The current value is located in 16 bits across the current MSB
    + * and LSB registers in two's compliment form
    + * Sign bit of the current value is in bit 7 of the current MSB register
    + * Bits 14 - 8 of the current value are in bits 6 - 0 of the current
    + * MSB register
    + * Bits 7 - 0 of the current value are in bits 7 - 0 of the current
    + * LSB register
    + */
    + ret = ds2781_read16(dev_info, &current_raw, reg_msb);
    + if (ret < 0)
    + return ret;
    +
    + *current_uA = current_raw * (DS2781_CURRENT_UNITS / sense_res);
    + return 0;
    +}
    +
    +static int ds2781_get_accumulated_current(struct ds2781_device_info *dev_info,
    + int *accumulated_current)
    +{
    + int ret, sense_res;
    + s16 current_raw;
    + u8 sense_res_raw;
    +
    + /*
    + * The units of measurement for accumulated current are dependent on
    + * the value of the sense resistor.
    + */
    + ret = ds2781_read8(dev_info, &sense_res_raw, DS2781_RSNSP);
    + if (ret < 0)
    + return ret;
    +
    + if (sense_res_raw == 0) {
    + dev_err(dev_info->dev, "sense resistor value is 0\n");
    + return -EINVAL;
    + }
    + sense_res = 1000 / sense_res_raw;
    +
    + /*
    + * The ACR value is located in 16 bits across the ACR MSB and
    + * LSB registers
    + * Bits 15 - 8 of the ACR value are in bits 7 - 0 of the ACR
    + * MSB register
    + * Bits 7 - 0 of the ACR value are in bits 7 - 0 of the ACR
    + * LSB register
    + */
    + ret = ds2781_read16(dev_info, &current_raw, DS2781_ACR_MSB);
    + if (ret < 0)
    + return ret;
    +
    + *accumulated_current = current_raw * (DS2781_CHARGE_UNITS / sense_res);
    + return 0;
    +}
    +
    +static int ds2781_get_capacity(struct ds2781_device_info *dev_info,
    + int *capacity)
    +{
    + int ret;
    + u8 raw;
    +
    + ret = ds2781_read8(dev_info, &raw, DS2781_RARC);
    + if (ret < 0)
    + return ret;
    +
    + *capacity = raw;
    + return 0;
    +}
    +
    +static int ds2781_get_status(struct ds2781_device_info *dev_info, int *status)
    +{
    + int ret, current_uA, capacity;
    +
    + ret = ds2781_get_current(dev_info, CURRENT_NOW, &current_uA);
    + if (ret < 0)
    + return ret;
    +
    + ret = ds2781_get_capacity(dev_info, &capacity);
    + if (ret < 0)
    + return ret;
    +
    + if (power_supply_am_i_supplied(&dev_info->bat)) {
    + if (capacity == 100)
    + *status = POWER_SUPPLY_STATUS_FULL;
    + else if (current_uA > 50000)
    + *status = POWER_SUPPLY_STATUS_CHARGING;
    + else
    + *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
    + } else {
    + *status = POWER_SUPPLY_STATUS_DISCHARGING;
    + }
    + return 0;
    +}
    +
    +static int ds2781_get_charge_now(struct ds2781_device_info *dev_info,
    + int *charge_now)
    +{
    + int ret;
    + u16 charge_raw;
    +
    + /*
    + * The RAAC value is located in 16 bits across the RAAC MSB and
    + * LSB registers
    + * Bits 15 - 8 of the RAAC value are in bits 7 - 0 of the RAAC
    + * MSB register
    + * Bits 7 - 0 of the RAAC value are in bits 7 - 0 of the RAAC
    + * LSB register
    + */
    + ret = ds2781_read16(dev_info, &charge_raw, DS2781_RAAC_MSB);
    + if (ret < 0)
    + return ret;
    +
    + *charge_now = charge_raw * 1600;
    + return 0;
    +}
    +
    +static int ds2781_get_control_register(struct ds2781_device_info *dev_info,
    + u8 *control_reg)
    +{
    + return ds2781_read8(dev_info, control_reg, DS2781_CONTROL);
    +}
    +
    +static int ds2781_set_control_register(struct ds2781_device_info *dev_info,
    + u8 control_reg)
    +{
    + int ret;
    +
    + ret = ds2781_write(dev_info, &control_reg,
    + DS2781_CONTROL, sizeof(u8));
    + if (ret < 0)
    + return ret;
    +
    + return ds2781_save_eeprom(dev_info, DS2781_CONTROL);
    +}
    +
    +static int ds2781_battery_get_property(struct power_supply *psy,
    + enum power_supply_property psp,
    + union power_supply_propval *val)
    +{
    + int ret = 0;
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + switch (psp) {
    + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
    + ret = ds2781_get_voltage(dev_info, &val->intval);
    + break;
    +
    + case POWER_SUPPLY_PROP_TEMP:
    + ret = ds2781_get_temperature(dev_info, &val->intval);
    + break;
    +
    + case POWER_SUPPLY_PROP_MODEL_NAME:
    + val->strval = model;
    + break;
    +
    + case POWER_SUPPLY_PROP_MANUFACTURER:
    + val->strval = manufacturer;
    + break;
    +
    + case POWER_SUPPLY_PROP_CURRENT_NOW:
    + ret = ds2781_get_current(dev_info, CURRENT_NOW, &val->intval);
    + break;
    +
    + case POWER_SUPPLY_PROP_CURRENT_AVG:
    + ret = ds2781_get_current(dev_info, CURRENT_AVG, &val->intval);
    + break;
    +
    + case POWER_SUPPLY_PROP_STATUS:
    + ret = ds2781_get_status(dev_info, &val->intval);
    + break;
    +
    + case POWER_SUPPLY_PROP_CAPACITY:
    + ret = ds2781_get_capacity(dev_info, &val->intval);
    + break;
    +
    + case POWER_SUPPLY_PROP_CHARGE_COUNTER:
    + ret = ds2781_get_accumulated_current(dev_info, &val->intval);
    + break;
    +
    + case POWER_SUPPLY_PROP_CHARGE_NOW:
    + ret = ds2781_get_charge_now(dev_info, &val->intval);
    + break;
    +
    + default:
    + ret = -EINVAL;
    + }
    +
    + return ret;
    +}
    +
    +static enum power_supply_property ds2781_battery_props[] = {
    + POWER_SUPPLY_PROP_STATUS,
    + POWER_SUPPLY_PROP_VOLTAGE_NOW,
    + POWER_SUPPLY_PROP_TEMP,
    + POWER_SUPPLY_PROP_MODEL_NAME,
    + POWER_SUPPLY_PROP_MANUFACTURER,
    + POWER_SUPPLY_PROP_CURRENT_NOW,
    + POWER_SUPPLY_PROP_CURRENT_AVG,
    + POWER_SUPPLY_PROP_CAPACITY,
    + POWER_SUPPLY_PROP_CHARGE_COUNTER,
    + POWER_SUPPLY_PROP_CHARGE_NOW,
    +};
    +
    +static ssize_t ds2781_get_pmod_enabled(struct device *dev,
    + struct device_attribute *attr,
    + char *buf)
    +{
    + int ret;
    + u8 control_reg;
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + /* Get power mode */
    + ret = ds2781_get_control_register(dev_info, &control_reg);
    + if (ret < 0)
    + return ret;
    +
    + return sprintf(buf, "%d\n",
    + !!(control_reg & DS2781_CONTROL_PMOD));
    +}
    +
    +static ssize_t ds2781_set_pmod_enabled(struct device *dev,
    + struct device_attribute *attr,
    + const char *buf,
    + size_t count)
    +{
    + int ret;
    + u8 control_reg, new_setting;
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + /* Set power mode */
    + ret = ds2781_get_control_register(dev_info, &control_reg);
    + if (ret < 0)
    + return ret;
    +
    + ret = kstrtou8(buf, 0, &new_setting);
    + if (ret < 0)
    + return ret;
    +
    + if ((new_setting != 0) && (new_setting != 1)) {
    + dev_err(dev_info->dev, "Invalid pmod setting (0 or 1)\n");
    + return -EINVAL;
    + }
    +
    + if (new_setting)
    + control_reg |= DS2781_CONTROL_PMOD;
    + else
    + control_reg &= ~DS2781_CONTROL_PMOD;
    +
    + ret = ds2781_set_control_register(dev_info, control_reg);
    + if (ret < 0)
    + return ret;
    +
    + return count;
    +}
    +
    +static ssize_t ds2781_get_sense_resistor_value(struct device *dev,
    + struct device_attribute *attr,
    + char *buf)
    +{
    + int ret;
    + u8 sense_resistor;
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + ret = ds2781_read8(dev_info, &sense_resistor, DS2781_RSNSP);
    + if (ret < 0)
    + return ret;
    +
    + ret = sprintf(buf, "%d\n", sense_resistor);
    + return ret;
    +}
    +
    +static ssize_t ds2781_set_sense_resistor_value(struct device *dev,
    + struct device_attribute *attr,
    + const char *buf,
    + size_t count)
    +{
    + int ret;
    + u8 new_setting;
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + ret = kstrtou8(buf, 0, &new_setting);
    + if (ret < 0)
    + return ret;
    +
    + ret = ds2781_set_sense_register(dev_info, new_setting);
    + if (ret < 0)
    + return ret;
    +
    + return count;
    +}
    +
    +static ssize_t ds2781_get_rsgain_setting(struct device *dev,
    + struct device_attribute *attr,
    + char *buf)
    +{
    + int ret;
    + u16 rsgain;
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + ret = ds2781_get_rsgain_register(dev_info, &rsgain);
    + if (ret < 0)
    + return ret;
    +
    + return sprintf(buf, "%d\n", rsgain);
    +}
    +
    +static ssize_t ds2781_set_rsgain_setting(struct device *dev,
    + struct device_attribute *attr,
    + const char *buf,
    + size_t count)
    +{
    + int ret;
    + u16 new_setting;
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + ret = kstrtou16(buf, 0, &new_setting);
    + if (ret < 0)
    + return ret;
    +
    + /* Gain can only be from 0 to 1.999 in steps of .001 */
    + if (new_setting > 1999) {
    + dev_err(dev_info->dev, "Invalid rsgain setting (0 - 1999)\n");
    + return -EINVAL;
    + }
    +
    + ret = ds2781_set_rsgain_register(dev_info, new_setting);
    + if (ret < 0)
    + return ret;
    +
    + return count;
    +}
    +
    +static ssize_t ds2781_get_pio_pin(struct device *dev,
    + struct device_attribute *attr,
    + char *buf)
    +{
    + int ret;
    + u8 sfr;
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + ret = ds2781_read8(dev_info, &sfr, DS2781_SFR);
    + if (ret < 0)
    + return ret;
    +
    + ret = sprintf(buf, "%d\n", sfr & DS2781_SFR_PIOSC);
    + return ret;
    +}
    +
    +static ssize_t ds2781_set_pio_pin(struct device *dev,
    + struct device_attribute *attr,
    + const char *buf,
    + size_t count)
    +{
    + int ret;
    + u8 new_setting;
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + ret = kstrtou8(buf, 0, &new_setting);
    + if (ret < 0)
    + return ret;
    +
    + if ((new_setting != 0) && (new_setting != 1)) {
    + dev_err(dev_info->dev, "Invalid pio_pin setting (0 or 1)\n");
    + return -EINVAL;
    + }
    +
    + ret = ds2781_write(dev_info, &new_setting,
    + DS2781_SFR, sizeof(u8));
    + if (ret < 0)
    + return ret;
    +
    + return count;
    +}
    +
    +static ssize_t ds2781_read_param_eeprom_bin(struct file *filp,
    + struct kobject *kobj,
    + struct bin_attribute *bin_attr,
    + char *buf, loff_t off, size_t count)
    +{
    + struct device *dev = container_of(kobj, struct device, kobj);
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + count = min_t(loff_t, count,
    + DS2781_EEPROM_BLOCK1_END -
    + DS2781_EEPROM_BLOCK1_START + 1 - off);
    +
    + return ds2781_read_block(dev_info, buf,
    + DS2781_EEPROM_BLOCK1_START + off, count);
    +}
    +
    +static ssize_t ds2781_write_param_eeprom_bin(struct file *filp,
    + struct kobject *kobj,
    + struct bin_attribute *bin_attr,
    + char *buf, loff_t off, size_t count)
    +{
    + struct device *dev = container_of(kobj, struct device, kobj);
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    + int ret;
    +
    + count = min_t(loff_t, count,
    + DS2781_EEPROM_BLOCK1_END -
    + DS2781_EEPROM_BLOCK1_START + 1 - off);
    +
    + ret = ds2781_write(dev_info, buf,
    + DS2781_EEPROM_BLOCK1_START + off, count);
    + if (ret < 0)
    + return ret;
    +
    + ret = ds2781_save_eeprom(dev_info, DS2781_EEPROM_BLOCK1_START);
    + if (ret < 0)
    + return ret;
    +
    + return count;
    +}
    +
    +static struct bin_attribute ds2781_param_eeprom_bin_attr = {
    + .attr = {
    + .name = "param_eeprom",
    + .mode = S_IRUGO | S_IWUSR,
    + },
    + .size = DS2781_EEPROM_BLOCK1_END - DS2781_EEPROM_BLOCK1_START + 1,
    + .read = ds2781_read_param_eeprom_bin,
    + .write = ds2781_write_param_eeprom_bin,
    +};
    +
    +static ssize_t ds2781_read_user_eeprom_bin(struct file *filp,
    + struct kobject *kobj,
    + struct bin_attribute *bin_attr,
    + char *buf, loff_t off, size_t count)
    +{
    + struct device *dev = container_of(kobj, struct device, kobj);
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    +
    + count = min_t(loff_t, count,
    + DS2781_EEPROM_BLOCK0_END -
    + DS2781_EEPROM_BLOCK0_START + 1 - off);
    +
    + return ds2781_read_block(dev_info, buf,
    + DS2781_EEPROM_BLOCK0_START + off, count);
    +
    +}
    +
    +static ssize_t ds2781_write_user_eeprom_bin(struct file *filp,
    + struct kobject *kobj,
    + struct bin_attribute *bin_attr,
    + char *buf, loff_t off, size_t count)
    +{
    + struct device *dev = container_of(kobj, struct device, kobj);
    + struct power_supply *psy = to_power_supply(dev);
    + struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
    + int ret;
    +
    + count = min_t(loff_t, count,
    + DS2781_EEPROM_BLOCK0_END -
    + DS2781_EEPROM_BLOCK0_START + 1 - off);
    +
    + ret = ds2781_write(dev_info, buf,
    + DS2781_EEPROM_BLOCK0_START + off, count);
    + if (ret < 0)
    + return ret;
    +
    + ret = ds2781_save_eeprom(dev_info, DS2781_EEPROM_BLOCK0_START);
    + if (ret < 0)
    + return ret;
    +
    + return count;
    +}
    +
    +static struct bin_attribute ds2781_user_eeprom_bin_attr = {
    + .attr = {
    + .name = "user_eeprom",
    + .mode = S_IRUGO | S_IWUSR,
    + },
    + .size = DS2781_EEPROM_BLOCK0_END - DS2781_EEPROM_BLOCK0_START + 1,
    + .read = ds2781_read_user_eeprom_bin,
    + .write = ds2781_write_user_eeprom_bin,
    +};
    +
    +static DEVICE_ATTR(pmod_enabled, S_IRUGO | S_IWUSR, ds2781_get_pmod_enabled,
    + ds2781_set_pmod_enabled);
    +static DEVICE_ATTR(sense_resistor_value, S_IRUGO | S_IWUSR,
    + ds2781_get_sense_resistor_value, ds2781_set_sense_resistor_value);
    +static DEVICE_ATTR(rsgain_setting, S_IRUGO | S_IWUSR, ds2781_get_rsgain_setting,
    + ds2781_set_rsgain_setting);
    +static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2781_get_pio_pin,
    + ds2781_set_pio_pin);
    +
    +
    +static struct attribute *ds2781_attributes[] = {
    + &dev_attr_pmod_enabled.attr,
    + &dev_attr_sense_resistor_value.attr,
    + &dev_attr_rsgain_setting.attr,
    + &dev_attr_pio_pin.attr,
    + NULL
    +};
    +
    +static const struct attribute_group ds2781_attr_group = {
    + .attrs = ds2781_attributes,
    +};
    +
    +static int __devinit ds2781_battery_probe(struct platform_device *pdev)
    +{
    + int ret = 0;
    + struct ds2781_device_info *dev_info;
    +
    + dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
    + if (!dev_info) {
    + ret = -ENOMEM;
    + goto fail;
    + }
    +
    + platform_set_drvdata(pdev, dev_info);
    +
    + dev_info->dev = &pdev->dev;
    + dev_info->w1_dev = pdev->dev.parent;
    + dev_info->bat.name = dev_name(&pdev->dev);
    + dev_info->bat.type = POWER_SUPPLY_TYPE_BATTERY;
    + dev_info->bat.properties = ds2781_battery_props;
    + dev_info->bat.num_properties = ARRAY_SIZE(ds2781_battery_props);
    + dev_info->bat.get_property = ds2781_battery_get_property;
    + dev_info->mutex_holder = current;
    +
    + ret = power_supply_register(&pdev->dev, &dev_info->bat);
    + if (ret) {
    + dev_err(dev_info->dev, "failed to register battery\n");
    + goto fail_free_info;
    + }
    +
    + ret = sysfs_create_group(&dev_info->bat.dev->kobj, &ds2781_attr_group);
    + if (ret) {
    + dev_err(dev_info->dev, "failed to create sysfs group\n");
    + goto fail_unregister;
    + }
    +
    + ret = sysfs_create_bin_file(&dev_info->bat.dev->kobj,
    + &ds2781_param_eeprom_bin_attr);
    + if (ret) {
    + dev_err(dev_info->dev,
    + "failed to create param eeprom bin file");
    + goto fail_remove_group;
    + }
    +
    + ret = sysfs_create_bin_file(&dev_info->bat.dev->kobj,
    + &ds2781_user_eeprom_bin_attr);
    + if (ret) {
    + dev_err(dev_info->dev,
    + "failed to create user eeprom bin file");
    + goto fail_remove_bin_file;
    + }
    +
    + dev_info->mutex_holder = NULL;
    +
    + return 0;
    +
    +fail_remove_bin_file:
    + sysfs_remove_bin_file(&dev_info->bat.dev->kobj,
    + &ds2781_param_eeprom_bin_attr);
    +fail_remove_group:
    + sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2781_attr_group);
    +fail_unregister:
    + power_supply_unregister(&dev_info->bat);
    +fail_free_info:
    + kfree(dev_info);
    +fail:
    + return ret;
    +}
    +
    +static int __devexit ds2781_battery_remove(struct platform_device *pdev)
    +{
    + struct ds2781_device_info *dev_info = platform_get_drvdata(pdev);
    +
    + dev_info->mutex_holder = current;
    +
    + /* remove attributes */
    + sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2781_attr_group);
    +
    + power_supply_unregister(&dev_info->bat);
    +
    + kfree(dev_info);
    + return 0;
    +}
    +
    +static struct platform_driver ds2781_battery_driver = {
    + .driver = {
    + .name = "ds2781-battery",
    + },
    + .probe = ds2781_battery_probe,
    + .remove = __devexit_p(ds2781_battery_remove),
    +};
    +
    +static int __init ds2781_battery_init(void)
    +{
    + return platform_driver_register(&ds2781_battery_driver);
    +}
    +
    +static void __exit ds2781_battery_exit(void)
    +{
    + platform_driver_unregister(&ds2781_battery_driver);
    +}
    +
    +module_init(ds2781_battery_init);
    +module_exit(ds2781_battery_exit);
    +
    +
    +MODULE_LICENSE("GPL");
    +MODULE_AUTHOR("Renata Sayakhova <renata@oktetlabs.ru>");
    +MODULE_DESCRIPTION("Maxim/Dallas DS2781 Stand-Alone Fuel Gauage IC driver");
    +MODULE_ALIAS("platform:ds2781-battery");
    +
    diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig
    index d0cb01b..eb9e376 100644
    --- a/drivers/w1/slaves/Kconfig
    +++ b/drivers/w1/slaves/Kconfig
    @@ -81,6 +81,19 @@ config W1_SLAVE_DS2780

    If you are unsure, say N.

    +config W1_SLAVE_DS2781
    + tristate "Dallas 2781 battery monitor chip"
    + depends on W1
    + help
    + If you enable this you will have the DS2781 battery monitor
    + chip support.
    +
    + The battery monitor chip is used in many batteries/devices
    + as the one who is responsible for charging/discharging/monitoring
    + Li+ batteries.
    +
    + If you are unsure, say N.
    +
    config W1_SLAVE_BQ27000
    tristate "BQ27000 slave support"
    depends on W1
    diff --git a/drivers/w1/slaves/Makefile b/drivers/w1/slaves/Makefile
    index 1f31e9f..c4f1859 100644
    --- a/drivers/w1/slaves/Makefile
    +++ b/drivers/w1/slaves/Makefile
    @@ -10,4 +10,5 @@ obj-$(CONFIG_W1_SLAVE_DS2431) += w1_ds2431.o
    obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o
    obj-$(CONFIG_W1_SLAVE_DS2760) += w1_ds2760.o
    obj-$(CONFIG_W1_SLAVE_DS2780) += w1_ds2780.o
    +obj-$(CONFIG_W1_SLAVE_DS2781) += w1_ds2781.o
    obj-$(CONFIG_W1_SLAVE_BQ27000) += w1_bq27000.o
    diff --git a/drivers/w1/slaves/w1_ds2781.c b/drivers/w1/slaves/w1_ds2781.c
    new file mode 100644
    index 0000000..0d0c798
    --- /dev/null
    +++ b/drivers/w1/slaves/w1_ds2781.c
    @@ -0,0 +1,201 @@
    +/*
    + * 1-Wire implementation for the ds2781 chip
    + *
    + * Author: Renata Sayakhova <renata@oktetlabs.ru>
    + *
    + * Based on w1-ds2780 driver
    + *
    + * 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/kernel.h>
    +#include <linux/module.h>
    +#include <linux/device.h>
    +#include <linux/types.h>
    +#include <linux/platform_device.h>
    +#include <linux/mutex.h>
    +#include <linux/idr.h>
    +
    +#include "../w1.h"
    +#include "../w1_int.h"
    +#include "../w1_family.h"
    +#include "w1_ds2781.h"
    +
    +static int w1_ds2781_do_io(struct device *dev, char *buf, int addr,
    + size_t count, int io)
    +{
    + struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
    +
    + if (addr > DS2781_DATA_SIZE || addr < 0)
    + return 0;
    +
    + count = min_t(int, count, DS2781_DATA_SIZE - addr);
    +
    + if (w1_reset_select_slave(sl) == 0) {
    + if (io) {
    + w1_write_8(sl->master, W1_DS2781_WRITE_DATA);
    + w1_write_8(sl->master, addr);
    + w1_write_block(sl->master, buf, count);
    + } else {
    + w1_write_8(sl->master, W1_DS2781_READ_DATA);
    + w1_write_8(sl->master, addr);
    + count = w1_read_block(sl->master, buf, count);
    + }
    + }
    +
    + return count;
    +}
    +
    +int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count,
    + int io)
    +{
    + struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
    + int ret;
    +
    + if (!dev)
    + return -ENODEV;
    +
    + mutex_lock(&sl->master->mutex);
    +
    + ret = w1_ds2781_do_io(dev, buf, addr, count, io);
    +
    + mutex_unlock(&sl->master->mutex);
    +
    + return ret;
    +}
    +EXPORT_SYMBOL(w1_ds2781_io);
    +
    +int w1_ds2781_io_nolock(struct device *dev, char *buf, int addr, size_t count,
    + int io)
    +{
    + int ret;
    +
    + if (!dev)
    + return -ENODEV;
    +
    + ret = w1_ds2781_do_io(dev, buf, addr, count, io);
    +
    + return ret;
    +}
    +EXPORT_SYMBOL(w1_ds2781_io_nolock);
    +
    +int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd)
    +{
    + struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
    +
    + if (!dev)
    + return -EINVAL;
    +
    + mutex_lock(&sl->master->mutex);
    +
    + if (w1_reset_select_slave(sl) == 0) {
    + w1_write_8(sl->master, cmd);
    + w1_write_8(sl->master, addr);
    + }
    +
    + mutex_unlock(&sl->master->mutex);
    + return 0;
    +}
    +EXPORT_SYMBOL(w1_ds2781_eeprom_cmd);
    +
    +static ssize_t w1_ds2781_read_bin(struct file *filp,
    + struct kobject *kobj,
    + struct bin_attribute *bin_attr,
    + char *buf, loff_t off, size_t count)
    +{
    + struct device *dev = container_of(kobj, struct device, kobj);
    + return w1_ds2781_io(dev, buf, off, count, 0);
    +}
    +
    +static struct bin_attribute w1_ds2781_bin_attr = {
    + .attr = {
    + .name = "w1_slave",
    + .mode = S_IRUGO,
    + },
    + .size = DS2781_DATA_SIZE,
    + .read = w1_ds2781_read_bin,
    +};
    +
    +static DEFINE_IDA(bat_ida);
    +
    +static int w1_ds2781_add_slave(struct w1_slave *sl)
    +{
    + int ret;
    + int id;
    + struct platform_device *pdev;
    +
    + id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL);
    + if (id < 0) {
    + ret = id;
    + goto noid;
    + }
    +
    + pdev = platform_device_alloc("ds2781-battery", id);
    + if (!pdev) {
    + ret = -ENOMEM;
    + goto pdev_alloc_failed;
    + }
    + pdev->dev.parent = &sl->dev;
    +
    + ret = platform_device_add(pdev);
    + if (ret)
    + goto pdev_add_failed;
    +
    + ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
    + if (ret)
    + goto bin_attr_failed;
    +
    + dev_set_drvdata(&sl->dev, pdev);
    +
    + return 0;
    +
    +bin_attr_failed:
    +pdev_add_failed:
    + platform_device_unregister(pdev);
    +pdev_alloc_failed:
    + ida_simple_remove(&bat_ida, id);
    +noid:
    + return ret;
    +}
    +
    +static void w1_ds2781_remove_slave(struct w1_slave *sl)
    +{
    + struct platform_device *pdev = dev_get_drvdata(&sl->dev);
    + int id = pdev->id;
    +
    + platform_device_unregister(pdev);
    + ida_simple_remove(&bat_ida, id);
    + sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
    +}
    +
    +static struct w1_family_ops w1_ds2781_fops = {
    + .add_slave = w1_ds2781_add_slave,
    + .remove_slave = w1_ds2781_remove_slave,
    +};
    +
    +static struct w1_family w1_ds2781_family = {
    + .fid = W1_FAMILY_DS2781,
    + .fops = &w1_ds2781_fops,
    +};
    +
    +static int __init w1_ds2781_init(void)
    +{
    + ida_init(&bat_ida);
    + return w1_register_family(&w1_ds2781_family);
    +}
    +
    +static void __exit w1_ds2781_exit(void)
    +{
    + w1_unregister_family(&w1_ds2781_family);
    + ida_destroy(&bat_ida);
    +}
    +
    +module_init(w1_ds2781_init);
    +module_exit(w1_ds2781_exit);
    +
    +MODULE_LICENSE("GPL");
    +MODULE_AUTHOR("Renata Sayakhova <renata@oktetlabs.ru>");
    +MODULE_DESCRIPTION("1-wire Driver for Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC");
    diff --git a/drivers/w1/slaves/w1_ds2781.h b/drivers/w1/slaves/w1_ds2781.h
    new file mode 100644
    index 0000000..82bc664
    --- /dev/null
    +++ b/drivers/w1/slaves/w1_ds2781.h
    @@ -0,0 +1,136 @@
    +/*
    + * 1-Wire implementation for the ds2780 chip
    + *
    + * Author: Renata Sayakhova <renata@oktetlabs.ru>
    + *
    + * Based on w1-ds2760 driver
    + *
    + * 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.
    + *
    + */
    +
    +#ifndef _W1_DS2781_H
    +#define _W1_DS2781_H
    +
    +/* Function commands */
    +#define W1_DS2781_READ_DATA 0x69
    +#define W1_DS2781_WRITE_DATA 0x6C
    +#define W1_DS2781_COPY_DATA 0x48
    +#define W1_DS2781_RECALL_DATA 0xB8
    +#define W1_DS2781_LOCK 0x6A
    +
    +/* Register map */
    +/* Register 0x00 Reserved */
    +#define DS2781_STATUS 0x01
    +#define DS2781_RAAC_MSB 0x02
    +#define DS2781_RAAC_LSB 0x03
    +#define DS2781_RSAC_MSB 0x04
    +#define DS2781_RSAC_LSB 0x05
    +#define DS2781_RARC 0x06
    +#define DS2781_RSRC 0x07
    +#define DS2781_IAVG_MSB 0x08
    +#define DS2781_IAVG_LSB 0x09
    +#define DS2781_TEMP_MSB 0x0A
    +#define DS2781_TEMP_LSB 0x0B
    +#define DS2781_VOLT_MSB 0x0C
    +#define DS2781_VOLT_LSB 0x0D
    +#define DS2781_CURRENT_MSB 0x0E
    +#define DS2781_CURRENT_LSB 0x0F
    +#define DS2781_ACR_MSB 0x10
    +#define DS2781_ACR_LSB 0x11
    +#define DS2781_ACRL_MSB 0x12
    +#define DS2781_ACRL_LSB 0x13
    +#define DS2781_AS 0x14
    +#define DS2781_SFR 0x15
    +#define DS2781_FULL_MSB 0x16
    +#define DS2781_FULL_LSB 0x17
    +#define DS2781_AE_MSB 0x18
    +#define DS2781_AE_LSB 0x19
    +#define DS2781_SE_MSB 0x1A
    +#define DS2781_SE_LSB 0x1B
    +/* Register 0x1C - 0x1E Reserved */
    +#define DS2781_EEPROM 0x1F
    +#define DS2781_EEPROM_BLOCK0_START 0x20
    +/* Register 0x20 - 0x2F User EEPROM */
    +#define DS2781_EEPROM_BLOCK0_END 0x2F
    +/* Register 0x30 - 0x5F Reserved */
    +#define DS2781_EEPROM_BLOCK1_START 0x60
    +#define DS2781_CONTROL 0x60
    +#define DS2781_AB 0x61
    +#define DS2781_AC_MSB 0x62
    +#define DS2781_AC_LSB 0x63
    +#define DS2781_VCHG 0x64
    +#define DS2781_IMIN 0x65
    +#define DS2781_VAE 0x66
    +#define DS2781_IAE 0x67
    +#define DS2781_AE_40 0x68
    +#define DS2781_RSNSP 0x69
    +#define DS2781_FULL_40_MSB 0x6A
    +#define DS2781_FULL_40_LSB 0x6B
    +#define DS2781_FULL_4_SLOPE 0x6C
    +#define DS2781_FULL_3_SLOPE 0x6D
    +#define DS2781_FULL_2_SLOPE 0x6E
    +#define DS2781_FULL_1_SLOPE 0x6F
    +#define DS2781_AE_4_SLOPE 0x70
    +#define DS2781_AE_3_SLOPE 0x71
    +#define DS2781_AE_2_SLOPE 0x72
    +#define DS2781_AE_1_SLOPE 0x73
    +#define DS2781_SE_4_SLOPE 0x74
    +#define DS2781_SE_3_SLOPE 0x75
    +#define DS2781_SE_2_SLOPE 0x76
    +#define DS2781_SE_1_SLOPE 0x77
    +#define DS2781_RSGAIN_MSB 0x78
    +#define DS2781_RSGAIN_LSB 0x79
    +#define DS2781_RSTC 0x7A
    +#define DS2781_COB 0x7B
    +#define DS2781_TBP34 0x7C
    +#define DS2781_TBP23 0x7D
    +#define DS2781_TBP12 0x7E
    +#define DS2781_EEPROM_BLOCK1_END 0x7F
    +/* Register 0x7D - 0xFF Reserved */
    +
    +#define DS2781_FSGAIN_MSB 0xB0
    +#define DS2781_FSGAIN_LSB 0xB1
    +
    +/* Number of valid register addresses */
    +#define DS2781_DATA_SIZE 0xB2
    +
    +/* Status register bits */
    +#define DS2781_STATUS_CHGTF (1 << 7)
    +#define DS2781_STATUS_AEF (1 << 6)
    +#define DS2781_STATUS_SEF (1 << 5)
    +#define DS2781_STATUS_LEARNF (1 << 4)
    +/* Bit 3 Reserved */
    +#define DS2781_STATUS_UVF (1 << 2)
    +#define DS2781_STATUS_PORF (1 << 1)
    +/* Bit 0 Reserved */
    +
    +/* Control register bits */
    +/* Bit 7 Reserved */
    +#define DS2781_CONTROL_NBEN (1 << 7)
    +#define DS2781_CONTROL_UVEN (1 << 6)
    +#define DS2781_CONTROL_PMOD (1 << 5)
    +#define DS2781_CONTROL_RNAOP (1 << 4)
    +#define DS1781_CONTROL_UVTH (1 << 3)
    +/* Bit 0 - 2 Reserved */
    +
    +/* Special feature register bits */
    +/* Bit 1 - 7 Reserved */
    +#define DS2781_SFR_PIOSC (1 << 0)
    +
    +/* EEPROM register bits */
    +#define DS2781_EEPROM_EEC (1 << 7)
    +#define DS2781_EEPROM_LOCK (1 << 6)
    +/* Bit 2 - 6 Reserved */
    +#define DS2781_EEPROM_BL1 (1 << 1)
    +#define DS2781_EEPROM_BL0 (1 << 0)
    +
    +extern int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count,
    + int io);
    +extern int w1_ds2781_io_nolock(struct device *dev, char *buf, int addr,
    + size_t count, int io);
    +extern int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd);
    +
    +#endif /* !_W1_DS2781_H */
    diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h
    index 490cda2..874aeb0 100644
    --- a/drivers/w1/w1_family.h
    +++ b/drivers/w1/w1_family.h
    @@ -38,6 +38,7 @@
    #define W1_EEPROM_DS2431 0x2D
    #define W1_FAMILY_DS2760 0x30
    #define W1_FAMILY_DS2780 0x32
    +#define W1_FAMILY_DS2781 0x3D
    #define W1_THERM_DS28EA00 0x42

    #define MAXNAMELEN 32
    --
    1.7.6.3


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