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path: root/drivers/power/bq20z75.c
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Diffstat (limited to 'drivers/power/bq20z75.c')
-rw-r--r--drivers/power/bq20z75.c794
1 files changed, 0 insertions, 794 deletions
diff --git a/drivers/power/bq20z75.c b/drivers/power/bq20z75.c
deleted file mode 100644
index 9c5e5beda3a..00000000000
--- a/drivers/power/bq20z75.c
+++ /dev/null
@@ -1,794 +0,0 @@
-/*
- * Gas Gauge driver for TI's BQ20Z75
- *
- * Copyright (c) 2010, NVIDIA Corporation.
- *
- * 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.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/err.h>
-#include <linux/power_supply.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/gpio.h>
-
-#include <linux/power/bq20z75.h>
-
-enum {
- REG_MANUFACTURER_DATA,
- REG_TEMPERATURE,
- REG_VOLTAGE,
- REG_CURRENT,
- REG_CAPACITY,
- REG_TIME_TO_EMPTY,
- REG_TIME_TO_FULL,
- REG_STATUS,
- REG_CYCLE_COUNT,
- REG_SERIAL_NUMBER,
- REG_REMAINING_CAPACITY,
- REG_REMAINING_CAPACITY_CHARGE,
- REG_FULL_CHARGE_CAPACITY,
- REG_FULL_CHARGE_CAPACITY_CHARGE,
- REG_DESIGN_CAPACITY,
- REG_DESIGN_CAPACITY_CHARGE,
- REG_DESIGN_VOLTAGE,
-};
-
-/* Battery Mode defines */
-#define BATTERY_MODE_OFFSET 0x03
-#define BATTERY_MODE_MASK 0x8000
-enum bq20z75_battery_mode {
- BATTERY_MODE_AMPS,
- BATTERY_MODE_WATTS
-};
-
-/* manufacturer access defines */
-#define MANUFACTURER_ACCESS_STATUS 0x0006
-#define MANUFACTURER_ACCESS_SLEEP 0x0011
-
-/* battery status value bits */
-#define BATTERY_DISCHARGING 0x40
-#define BATTERY_FULL_CHARGED 0x20
-#define BATTERY_FULL_DISCHARGED 0x10
-
-#define BQ20Z75_DATA(_psp, _addr, _min_value, _max_value) { \
- .psp = _psp, \
- .addr = _addr, \
- .min_value = _min_value, \
- .max_value = _max_value, \
-}
-
-static const struct bq20z75_device_data {
- enum power_supply_property psp;
- u8 addr;
- int min_value;
- int max_value;
-} bq20z75_data[] = {
- [REG_MANUFACTURER_DATA] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_PRESENT, 0x00, 0, 65535),
- [REG_TEMPERATURE] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_TEMP, 0x08, 0, 65535),
- [REG_VOLTAGE] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_VOLTAGE_NOW, 0x09, 0, 20000),
- [REG_CURRENT] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_CURRENT_NOW, 0x0A, -32768,
- 32767),
- [REG_CAPACITY] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_CAPACITY, 0x0E, 0, 100),
- [REG_REMAINING_CAPACITY] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_ENERGY_NOW, 0x0F, 0, 65535),
- [REG_REMAINING_CAPACITY_CHARGE] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_CHARGE_NOW, 0x0F, 0, 65535),
- [REG_FULL_CHARGE_CAPACITY] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_ENERGY_FULL, 0x10, 0, 65535),
- [REG_FULL_CHARGE_CAPACITY_CHARGE] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_CHARGE_FULL, 0x10, 0, 65535),
- [REG_TIME_TO_EMPTY] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, 0x12, 0,
- 65535),
- [REG_TIME_TO_FULL] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 0x13, 0,
- 65535),
- [REG_STATUS] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_STATUS, 0x16, 0, 65535),
- [REG_CYCLE_COUNT] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_CYCLE_COUNT, 0x17, 0, 65535),
- [REG_DESIGN_CAPACITY] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 0x18, 0,
- 65535),
- [REG_DESIGN_CAPACITY_CHARGE] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 0x18, 0,
- 65535),
- [REG_DESIGN_VOLTAGE] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 0x19, 0,
- 65535),
- [REG_SERIAL_NUMBER] =
- BQ20Z75_DATA(POWER_SUPPLY_PROP_SERIAL_NUMBER, 0x1C, 0, 65535),
-};
-
-static enum power_supply_property bq20z75_properties[] = {
- POWER_SUPPLY_PROP_STATUS,
- POWER_SUPPLY_PROP_HEALTH,
- POWER_SUPPLY_PROP_PRESENT,
- POWER_SUPPLY_PROP_TECHNOLOGY,
- POWER_SUPPLY_PROP_CYCLE_COUNT,
- POWER_SUPPLY_PROP_VOLTAGE_NOW,
- POWER_SUPPLY_PROP_CURRENT_NOW,
- POWER_SUPPLY_PROP_CAPACITY,
- POWER_SUPPLY_PROP_TEMP,
- POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
- POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
- POWER_SUPPLY_PROP_SERIAL_NUMBER,
- POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
- POWER_SUPPLY_PROP_ENERGY_NOW,
- POWER_SUPPLY_PROP_ENERGY_FULL,
- POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
- POWER_SUPPLY_PROP_CHARGE_NOW,
- POWER_SUPPLY_PROP_CHARGE_FULL,
- POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
-};
-
-struct bq20z75_info {
- struct i2c_client *client;
- struct power_supply power_supply;
- struct bq20z75_platform_data *pdata;
- bool is_present;
- bool gpio_detect;
- bool enable_detection;
- int irq;
- int last_state;
- int poll_time;
- struct delayed_work work;
- int ignore_changes;
-};
-
-static int bq20z75_read_word_data(struct i2c_client *client, u8 address)
-{
- struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
- s32 ret = 0;
- int retries = 1;
-
- if (bq20z75_device->pdata)
- retries = max(bq20z75_device->pdata->i2c_retry_count + 1, 1);
-
- while (retries > 0) {
- ret = i2c_smbus_read_word_data(client, address);
- if (ret >= 0)
- break;
- retries--;
- }
-
- if (ret < 0) {
- dev_dbg(&client->dev,
- "%s: i2c read at address 0x%x failed\n",
- __func__, address);
- return ret;
- }
-
- return le16_to_cpu(ret);
-}
-
-static int bq20z75_write_word_data(struct i2c_client *client, u8 address,
- u16 value)
-{
- struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
- s32 ret = 0;
- int retries = 1;
-
- if (bq20z75_device->pdata)
- retries = max(bq20z75_device->pdata->i2c_retry_count + 1, 1);
-
- while (retries > 0) {
- ret = i2c_smbus_write_word_data(client, address,
- le16_to_cpu(value));
- if (ret >= 0)
- break;
- retries--;
- }
-
- if (ret < 0) {
- dev_dbg(&client->dev,
- "%s: i2c write to address 0x%x failed\n",
- __func__, address);
- return ret;
- }
-
- return 0;
-}
-
-static int bq20z75_get_battery_presence_and_health(
- struct i2c_client *client, enum power_supply_property psp,
- union power_supply_propval *val)
-{
- s32 ret;
- struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
-
- if (psp == POWER_SUPPLY_PROP_PRESENT &&
- bq20z75_device->gpio_detect) {
- ret = gpio_get_value(
- bq20z75_device->pdata->battery_detect);
- if (ret == bq20z75_device->pdata->battery_detect_present)
- val->intval = 1;
- else
- val->intval = 0;
- bq20z75_device->is_present = val->intval;
- return ret;
- }
-
- /* Write to ManufacturerAccess with
- * ManufacturerAccess command and then
- * read the status */
- ret = bq20z75_write_word_data(client,
- bq20z75_data[REG_MANUFACTURER_DATA].addr,
- MANUFACTURER_ACCESS_STATUS);
- if (ret < 0) {
- if (psp == POWER_SUPPLY_PROP_PRESENT)
- val->intval = 0; /* battery removed */
- return ret;
- }
-
- ret = bq20z75_read_word_data(client,
- bq20z75_data[REG_MANUFACTURER_DATA].addr);
- if (ret < 0)
- return ret;
-
- if (ret < bq20z75_data[REG_MANUFACTURER_DATA].min_value ||
- ret > bq20z75_data[REG_MANUFACTURER_DATA].max_value) {
- val->intval = 0;
- return 0;
- }
-
- /* Mask the upper nibble of 2nd byte and
- * lower byte of response then
- * shift the result by 8 to get status*/
- ret &= 0x0F00;
- ret >>= 8;
- if (psp == POWER_SUPPLY_PROP_PRESENT) {
- if (ret == 0x0F)
- /* battery removed */
- val->intval = 0;
- else
- val->intval = 1;
- } else if (psp == POWER_SUPPLY_PROP_HEALTH) {
- if (ret == 0x09)
- val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
- else if (ret == 0x0B)
- val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
- else if (ret == 0x0C)
- val->intval = POWER_SUPPLY_HEALTH_DEAD;
- else
- val->intval = POWER_SUPPLY_HEALTH_GOOD;
- }
-
- return 0;
-}
-
-static int bq20z75_get_battery_property(struct i2c_client *client,
- int reg_offset, enum power_supply_property psp,
- union power_supply_propval *val)
-{
- struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
- s32 ret;
-
- ret = bq20z75_read_word_data(client,
- bq20z75_data[reg_offset].addr);
- if (ret < 0)
- return ret;
-
- /* returned values are 16 bit */
- if (bq20z75_data[reg_offset].min_value < 0)
- ret = (s16)ret;
-
- if (ret >= bq20z75_data[reg_offset].min_value &&
- ret <= bq20z75_data[reg_offset].max_value) {
- val->intval = ret;
- if (psp != POWER_SUPPLY_PROP_STATUS)
- return 0;
-
- if (ret & BATTERY_FULL_CHARGED)
- val->intval = POWER_SUPPLY_STATUS_FULL;
- else if (ret & BATTERY_FULL_DISCHARGED)
- val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
- else if (ret & BATTERY_DISCHARGING)
- val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
- else
- val->intval = POWER_SUPPLY_STATUS_CHARGING;
-
- if (bq20z75_device->poll_time == 0)
- bq20z75_device->last_state = val->intval;
- else if (bq20z75_device->last_state != val->intval) {
- cancel_delayed_work_sync(&bq20z75_device->work);
- power_supply_changed(&bq20z75_device->power_supply);
- bq20z75_device->poll_time = 0;
- }
- } else {
- if (psp == POWER_SUPPLY_PROP_STATUS)
- val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
- else
- val->intval = 0;
- }
-
- return 0;
-}
-
-static void bq20z75_unit_adjustment(struct i2c_client *client,
- enum power_supply_property psp, union power_supply_propval *val)
-{
-#define BASE_UNIT_CONVERSION 1000
-#define BATTERY_MODE_CAP_MULT_WATT (10 * BASE_UNIT_CONVERSION)
-#define TIME_UNIT_CONVERSION 60
-#define TEMP_KELVIN_TO_CELSIUS 2731
- switch (psp) {
- case POWER_SUPPLY_PROP_ENERGY_NOW:
- case POWER_SUPPLY_PROP_ENERGY_FULL:
- case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
- /* bq20z75 provides energy in units of 10mWh.
- * Convert to µWh
- */
- val->intval *= BATTERY_MODE_CAP_MULT_WATT;
- break;
-
- case POWER_SUPPLY_PROP_VOLTAGE_NOW:
- case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
- case POWER_SUPPLY_PROP_CURRENT_NOW:
- case POWER_SUPPLY_PROP_CHARGE_NOW:
- case POWER_SUPPLY_PROP_CHARGE_FULL:
- case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
- val->intval *= BASE_UNIT_CONVERSION;
- break;
-
- case POWER_SUPPLY_PROP_TEMP:
- /* bq20z75 provides battery temperature in 0.1K
- * so convert it to 0.1°C
- */
- val->intval -= TEMP_KELVIN_TO_CELSIUS;
- break;
-
- case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
- case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
- /* bq20z75 provides time to empty and time to full in minutes.
- * Convert to seconds
- */
- val->intval *= TIME_UNIT_CONVERSION;
- break;
-
- default:
- dev_dbg(&client->dev,
- "%s: no need for unit conversion %d\n", __func__, psp);
- }
-}
-
-static enum bq20z75_battery_mode
-bq20z75_set_battery_mode(struct i2c_client *client,
- enum bq20z75_battery_mode mode)
-{
- int ret, original_val;
-
- original_val = bq20z75_read_word_data(client, BATTERY_MODE_OFFSET);
- if (original_val < 0)
- return original_val;
-
- if ((original_val & BATTERY_MODE_MASK) == mode)
- return mode;
-
- if (mode == BATTERY_MODE_AMPS)
- ret = original_val & ~BATTERY_MODE_MASK;
- else
- ret = original_val | BATTERY_MODE_MASK;
-
- ret = bq20z75_write_word_data(client, BATTERY_MODE_OFFSET, ret);
- if (ret < 0)
- return ret;
-
- return original_val & BATTERY_MODE_MASK;
-}
-
-static int bq20z75_get_battery_capacity(struct i2c_client *client,
- int reg_offset, enum power_supply_property psp,
- union power_supply_propval *val)
-{
- s32 ret;
- enum bq20z75_battery_mode mode = BATTERY_MODE_WATTS;
-
- if (power_supply_is_amp_property(psp))
- mode = BATTERY_MODE_AMPS;
-
- mode = bq20z75_set_battery_mode(client, mode);
- if (mode < 0)
- return mode;
-
- ret = bq20z75_read_word_data(client, bq20z75_data[reg_offset].addr);
- if (ret < 0)
- return ret;
-
- if (psp == POWER_SUPPLY_PROP_CAPACITY) {
- /* bq20z75 spec says that this can be >100 %
- * even if max value is 100 % */
- val->intval = min(ret, 100);
- } else
- val->intval = ret;
-
- ret = bq20z75_set_battery_mode(client, mode);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static char bq20z75_serial[5];
-static int bq20z75_get_battery_serial_number(struct i2c_client *client,
- union power_supply_propval *val)
-{
- int ret;
-
- ret = bq20z75_read_word_data(client,
- bq20z75_data[REG_SERIAL_NUMBER].addr);
- if (ret < 0)
- return ret;
-
- ret = sprintf(bq20z75_serial, "%04x", ret);
- val->strval = bq20z75_serial;
-
- return 0;
-}
-
-static int bq20z75_get_property_index(struct i2c_client *client,
- enum power_supply_property psp)
-{
- int count;
- for (count = 0; count < ARRAY_SIZE(bq20z75_data); count++)
- if (psp == bq20z75_data[count].psp)
- return count;
-
- dev_warn(&client->dev,
- "%s: Invalid Property - %d\n", __func__, psp);
-
- return -EINVAL;
-}
-
-static int bq20z75_get_property(struct power_supply *psy,
- enum power_supply_property psp,
- union power_supply_propval *val)
-{
- int ret = 0;
- struct bq20z75_info *bq20z75_device = container_of(psy,
- struct bq20z75_info, power_supply);
- struct i2c_client *client = bq20z75_device->client;
-
- switch (psp) {
- case POWER_SUPPLY_PROP_PRESENT:
- case POWER_SUPPLY_PROP_HEALTH:
- ret = bq20z75_get_battery_presence_and_health(client, psp, val);
- if (psp == POWER_SUPPLY_PROP_PRESENT)
- return 0;
- break;
-
- case POWER_SUPPLY_PROP_TECHNOLOGY:
- val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
- break;
-
- case POWER_SUPPLY_PROP_ENERGY_NOW:
- case POWER_SUPPLY_PROP_ENERGY_FULL:
- case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
- case POWER_SUPPLY_PROP_CHARGE_NOW:
- case POWER_SUPPLY_PROP_CHARGE_FULL:
- case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
- case POWER_SUPPLY_PROP_CAPACITY:
- ret = bq20z75_get_property_index(client, psp);
- if (ret < 0)
- break;
-
- ret = bq20z75_get_battery_capacity(client, ret, psp, val);
- break;
-
- case POWER_SUPPLY_PROP_SERIAL_NUMBER:
- ret = bq20z75_get_battery_serial_number(client, val);
- break;
-
- case POWER_SUPPLY_PROP_STATUS:
- case POWER_SUPPLY_PROP_CYCLE_COUNT:
- case POWER_SUPPLY_PROP_VOLTAGE_NOW:
- case POWER_SUPPLY_PROP_CURRENT_NOW:
- case POWER_SUPPLY_PROP_TEMP:
- case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
- case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
- case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
- ret = bq20z75_get_property_index(client, psp);
- if (ret < 0)
- break;
-
- ret = bq20z75_get_battery_property(client, ret, psp, val);
- break;
-
- default:
- dev_err(&client->dev,
- "%s: INVALID property\n", __func__);
- return -EINVAL;
- }
-
- if (!bq20z75_device->enable_detection)
- goto done;
-
- if (!bq20z75_device->gpio_detect &&
- bq20z75_device->is_present != (ret >= 0)) {
- bq20z75_device->is_present = (ret >= 0);
- power_supply_changed(&bq20z75_device->power_supply);
- }
-
-done:
- if (!ret) {
- /* Convert units to match requirements for power supply class */
- bq20z75_unit_adjustment(client, psp, val);
- }
-
- dev_dbg(&client->dev,
- "%s: property = %d, value = %x\n", __func__, psp, val->intval);
-
- if (ret && bq20z75_device->is_present)
- return ret;
-
- /* battery not present, so return NODATA for properties */
- if (ret)
- return -ENODATA;
-
- return 0;
-}
-
-static irqreturn_t bq20z75_irq(int irq, void *devid)
-{
- struct power_supply *battery = devid;
-
- power_supply_changed(battery);
-
- return IRQ_HANDLED;
-}
-
-static void bq20z75_external_power_changed(struct power_supply *psy)
-{
- struct bq20z75_info *bq20z75_device;
-
- bq20z75_device = container_of(psy, struct bq20z75_info, power_supply);
-
- if (bq20z75_device->ignore_changes > 0) {
- bq20z75_device->ignore_changes--;
- return;
- }
-
- /* cancel outstanding work */
- cancel_delayed_work_sync(&bq20z75_device->work);
-
- schedule_delayed_work(&bq20z75_device->work, HZ);
- bq20z75_device->poll_time = bq20z75_device->pdata->poll_retry_count;
-}
-
-static void bq20z75_delayed_work(struct work_struct *work)
-{
- struct bq20z75_info *bq20z75_device;
- s32 ret;
-
- bq20z75_device = container_of(work, struct bq20z75_info, work.work);
-
- ret = bq20z75_read_word_data(bq20z75_device->client,
- bq20z75_data[REG_STATUS].addr);
- /* if the read failed, give up on this work */
- if (ret < 0) {
- bq20z75_device->poll_time = 0;
- return;
- }
-
- if (ret & BATTERY_FULL_CHARGED)
- ret = POWER_SUPPLY_STATUS_FULL;
- else if (ret & BATTERY_FULL_DISCHARGED)
- ret = POWER_SUPPLY_STATUS_NOT_CHARGING;
- else if (ret & BATTERY_DISCHARGING)
- ret = POWER_SUPPLY_STATUS_DISCHARGING;
- else
- ret = POWER_SUPPLY_STATUS_CHARGING;
-
- if (bq20z75_device->last_state != ret) {
- bq20z75_device->poll_time = 0;
- power_supply_changed(&bq20z75_device->power_supply);
- return;
- }
- if (bq20z75_device->poll_time > 0) {
- schedule_delayed_work(&bq20z75_device->work, HZ);
- bq20z75_device->poll_time--;
- return;
- }
-}
-
-static int __devinit bq20z75_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct bq20z75_info *bq20z75_device;
- struct bq20z75_platform_data *pdata = client->dev.platform_data;
- int rc;
- int irq;
-
- bq20z75_device = kzalloc(sizeof(struct bq20z75_info), GFP_KERNEL);
- if (!bq20z75_device)
- return -ENOMEM;
-
- bq20z75_device->client = client;
- bq20z75_device->enable_detection = false;
- bq20z75_device->gpio_detect = false;
- bq20z75_device->power_supply.name = "battery";
- bq20z75_device->power_supply.type = POWER_SUPPLY_TYPE_BATTERY;
- bq20z75_device->power_supply.properties = bq20z75_properties;
- bq20z75_device->power_supply.num_properties =
- ARRAY_SIZE(bq20z75_properties);
- bq20z75_device->power_supply.get_property = bq20z75_get_property;
- /* ignore first notification of external change, it is generated
- * from the power_supply_register call back
- */
- bq20z75_device->ignore_changes = 1;
- bq20z75_device->last_state = POWER_SUPPLY_STATUS_UNKNOWN;
- bq20z75_device->power_supply.external_power_changed =
- bq20z75_external_power_changed;
-
- if (pdata) {
- bq20z75_device->gpio_detect =
- gpio_is_valid(pdata->battery_detect);
- bq20z75_device->pdata = pdata;
- }
-
- i2c_set_clientdata(client, bq20z75_device);
-
- if (!bq20z75_device->gpio_detect)
- goto skip_gpio;
-
- rc = gpio_request(pdata->battery_detect, dev_name(&client->dev));
- if (rc) {
- dev_warn(&client->dev, "Failed to request gpio: %d\n", rc);
- bq20z75_device->gpio_detect = false;
- goto skip_gpio;
- }
-
- rc = gpio_direction_input(pdata->battery_detect);
- if (rc) {
- dev_warn(&client->dev, "Failed to get gpio as input: %d\n", rc);
- gpio_free(pdata->battery_detect);
- bq20z75_device->gpio_detect = false;
- goto skip_gpio;
- }
-
- irq = gpio_to_irq(pdata->battery_detect);
- if (irq <= 0) {
- dev_warn(&client->dev, "Failed to get gpio as irq: %d\n", irq);
- gpio_free(pdata->battery_detect);
- bq20z75_device->gpio_detect = false;
- goto skip_gpio;
- }
-
- rc = request_irq(irq, bq20z75_irq,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- dev_name(&client->dev), &bq20z75_device->power_supply);
- if (rc) {
- dev_warn(&client->dev, "Failed to request irq: %d\n", rc);
- gpio_free(pdata->battery_detect);
- bq20z75_device->gpio_detect = false;
- goto skip_gpio;
- }
-
- bq20z75_device->irq = irq;
-
-skip_gpio:
-
- rc = power_supply_register(&client->dev, &bq20z75_device->power_supply);
- if (rc) {
- dev_err(&client->dev,
- "%s: Failed to register power supply\n", __func__);
- goto exit_psupply;
- }
-
- dev_info(&client->dev,
- "%s: battery gas gauge device registered\n", client->name);
-
- INIT_DELAYED_WORK(&bq20z75_device->work, bq20z75_delayed_work);
-
- bq20z75_device->enable_detection = true;
-
- return 0;
-
-exit_psupply:
- if (bq20z75_device->irq)
- free_irq(bq20z75_device->irq, &bq20z75_device->power_supply);
- if (bq20z75_device->gpio_detect)
- gpio_free(pdata->battery_detect);
-
- kfree(bq20z75_device);
-
- return rc;
-}
-
-static int __devexit bq20z75_remove(struct i2c_client *client)
-{
- struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
-
- if (bq20z75_device->irq)
- free_irq(bq20z75_device->irq, &bq20z75_device->power_supply);
- if (bq20z75_device->gpio_detect)
- gpio_free(bq20z75_device->pdata->battery_detect);
-
- power_supply_unregister(&bq20z75_device->power_supply);
-
- cancel_delayed_work_sync(&bq20z75_device->work);
-
- kfree(bq20z75_device);
- bq20z75_device = NULL;
-
- return 0;
-}
-
-#if defined CONFIG_PM
-static int bq20z75_suspend(struct i2c_client *client,
- pm_message_t state)
-{
- struct bq20z75_info *bq20z75_device = i2c_get_clientdata(client);
- s32 ret;
-
- if (bq20z75_device->poll_time > 0)
- cancel_delayed_work_sync(&bq20z75_device->work);
-
- /* write to manufacturer access with sleep command */
- ret = bq20z75_write_word_data(client,
- bq20z75_data[REG_MANUFACTURER_DATA].addr,
- MANUFACTURER_ACCESS_SLEEP);
- if (bq20z75_device->is_present && ret < 0)
- return ret;
-
- return 0;
-}
-#else
-#define bq20z75_suspend NULL
-#endif
-/* any smbus transaction will wake up bq20z75 */
-#define bq20z75_resume NULL
-
-static const struct i2c_device_id bq20z75_id[] = {
- { "bq20z75", 0 },
- {}
-};
-MODULE_DEVICE_TABLE(i2c, bq20z75_id);
-
-static struct i2c_driver bq20z75_battery_driver = {
- .probe = bq20z75_probe,
- .remove = __devexit_p(bq20z75_remove),
- .suspend = bq20z75_suspend,
- .resume = bq20z75_resume,
- .id_table = bq20z75_id,
- .driver = {
- .name = "bq20z75-battery",
- },
-};
-
-static int __init bq20z75_battery_init(void)
-{
- return i2c_add_driver(&bq20z75_battery_driver);
-}
-module_init(bq20z75_battery_init);
-
-static void __exit bq20z75_battery_exit(void)
-{
- i2c_del_driver(&bq20z75_battery_driver);
-}
-module_exit(bq20z75_battery_exit);
-
-MODULE_DESCRIPTION("BQ20z75 battery monitor driver");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 02:26:12 +0000