2010-12-21 17:43:52

by dd diasemi

Subject: [PATCHv3 4/11] BATTERY: Battery module of DA9052 device driver

Battery module for DA9052 PMIC device from Dialog Semiconductor.

Changes made since last submission:
. added chip specific parameters to priv data.
. removed the DA9052 specific error codes.
. replaced kernel thread with workqueue.

Linux Kernel Version: 2.6.34

Signed-off-by: D. Chen <[email protected]>
diff -Naur A-source/drivers/power/da9052-battery.c
B-source/drivers/power/da9052-battery.c
--- A-source/drivers/power/da9052-battery.c 1970-01-01 05:00:00.000000000 +0500
+++ B-source/drivers/power/da9052-battery.c 2010-12-08 15:22:43.000000000 +0500
@@ -0,0 +1,778 @@
+/*
+ * da9052-battery.c -- Batttery Driver for Dialog DA9052
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+
+ * Author: Dialog Semiconductor Ltd <[email protected]>
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/uaccess.h>
+#include <linux/jiffies.h>
+#include <linux/power_supply.h>
+#include <linux/platform_device.h>
+#include <linux/freezer.h>
+
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/reg.h>
+#include <linux/mfd/da9052/bat.h>
+#include <linux/mfd/da9052/adc.h>
+
+#define DA9052_BAT_DEVICE_NAME "da9052-bat"
+
+static struct da9052_bat_hysteresis bat_hysteresis;
+static struct da9052_bat_event_registration event_status;
+static u16 array_hys_batvoltage[2];
+static u16 bat_volt_arr[3];
+static u8 hys_flag = FALSE;
+
+static int da9052_read(struct da9052 *da9052, u8 reg_address, u8 *reg_data)
+{
+ struct da9052_ssc_msg msg;
+ int ret;
+
+ msg.addr = reg_address;
+ msg.data = 0;
+
+ da9052_lock(da9052);
+ ret = da9052->read(da9052, &msg);
+ if (ret)
+ goto ssc_comm_err;
+ da9052_unlock(da9052);
+
+ *reg_data = msg.data;
+ return 0;
+ssc_comm_err:
+ da9052_unlock(da9052);
+ return ret;
+}
+
+static s32 da9052_adc_read_ich(struct da9052 *da9052, u16 *data)
+{
+ struct da9052_ssc_msg msg;
+ da9052_lock(da9052);
+ /* Read charging conversion register */
+ msg.addr = DA9052_ICHGAV_REG;
+ msg.data = 0;
+ if (da9052->read(da9052, &msg)) {
+ da9052_unlock(da9052);
+ return -EIO;
+ }
+ da9052_unlock(da9052);
+
+ *data = (u16)msg.data;
+ return 0;
+}
+
+static s32 da9052_adc_read_tbat(struct da9052 *da9052, u16 *data)
+{
+ s32 ret;
+ u8 reg_data;
+
+ ret = da9052_read(da9052, DA9052_TBATRES_REG, &reg_data);
+ if (ret)
+ return ret;
+ *data = (u16)reg_data;
+
+ return 0;
+}
+
+s32 da9052_adc_read_vbat(struct da9052 *da9052, u16 *data)
+{
+ s32 ret;
+
+ ret = da9052_manual_read(da9052, DA9052_ADC_VBAT);
+ if (ret == -EIO) {
+ *data = 0;
+ return ret;
+ } else {
+ *data = ret;
+ return 0;
+ }
+ return 0;
+}
+
+static u16 filter_sample(u16 *buffer)
+{
+ u8 count;
+ u16 tempvalue = 0;
+ u16 ret;
+
+ if (buffer == NULL)
+ return -EINVAL;
+
+ for (count = 0; count < FILTER_SIZE; count++)
+ tempvalue = tempvalue + *(buffer + count);
+
+ ret = tempvalue/FILTER_SIZE;
+ return ret;
+}
+
+static s32 da9052_bat_get_battery_temperature(struct da9052_charger_device
+ *chg_device, u16 *buffer)
+{
+
+ u8 count;
+ u16 filterqueue[FILTER_SIZE];
+
+ /* Measure the battery temperature using ADC function.
+ Number of read equal to average filter size*/
+ for (count = 0; count < FILTER_SIZE; count++)
+ if (da9052_adc_read_tbat(chg_device->da9052,
+ &filterqueue[count]))
+ return -EIO;
+
+ /* Apply Average filter */
+ filterqueue[0] = filter_sample(filterqueue);
+
+ chg_device->bat_temp = filterqueue[0];
+ *buffer = chg_device->bat_temp;
+ return 0;
+}
+
+static s32 da9052_bat_get_chg_current(struct da9052_charger_device
+ *chg_device, u16 *buffer)
+{
+ if (chg_device->status == POWER_SUPPLY_STATUS_DISCHARGING)
+ return -EIO;
+
+ /* Measure the Charger current using ADC function */
+ if (da9052_adc_read_ich(chg_device->da9052, buffer))
+ return -EIO;
+
+ /* Convert the raw value in terms of mA */
+ chg_device->chg_current = ichg_reg_to_mA(*buffer);
+ *buffer = chg_device->chg_current;
+
+ return 0;
+}
+
+
+s32 da9052_bat_get_battery_voltage(struct da9052_charger_device *chg_device,
+ u16 *buffer)
+{
+ u8 count;
+ u16 filterqueue[FILTER_SIZE];
+
+ /* Measure the battery voltage using ADC function.
+ Number of read equal to average filter size*/
+ for (count = 0; count < FILTER_SIZE; count++)
+ if (da9052_adc_read_vbat(chg_device->da9052,
+ &filterqueue[count]))
+ return -EIO;
+
+ /* Apply average filter */
+ filterqueue[0] = filter_sample(filterqueue);
+
+ /* Convert battery voltage raw value in terms of mV */
+ chg_device->bat_voltage = volt_reg_to_mV(filterqueue[0]);
+ *buffer = chg_device->bat_voltage;
+ return 0;
+}
+
+static void da9052_bat_status_update(struct da9052_charger_device
+ *chg_device)
+{
+ struct da9052_ssc_msg msg;
+ u16 current_value = 0;
+ u16 buffer = 0;
+ u8 regvalue = 0;
+ u8 old_status = chg_device->status;
+
+ /* Read Status A register */
+ msg.addr = DA9052_STATUSA_REG;
+ msg.data = 0;
+ da9052_lock(chg_device->da9052);
+
+ if (chg_device->da9052->read(chg_device->da9052, &msg)) {
+ da9052_unlock(chg_device->da9052);
+ return;
+ }
+ regvalue = msg.data;
+
+ /* Read Status B register */
+ msg.addr = DA9052_STATUSB_REG;
+ msg.data = 0;
+ if (chg_device->da9052->read(chg_device->da9052, &msg)) {
+ da9052_unlock(chg_device->da9052);
+ return;
+ }
+ da9052_unlock(chg_device->da9052);
+
+ /* If DCINDET and DCINSEL are set then connected charger is
+ WALL Charger unit */
+ if ((regvalue & DA9052_STATUSA_DCINSEL)
+ && (regvalue & DA9052_STATUSA_DCINDET))
+ chg_device->charger_type = DA9052_WALL_CHARGER;
+ /* If VBUS_DET and VBUSEL are set then connected charger is
+ USB Type */
+ else if ((regvalue & DA9052_STATUSA_VBUSSEL)
+ && (regvalue & DA9052_STATUSA_VBUSDET)) {
+ if (regvalue & DA9052_STATUSA_VDATDET)
+ chg_device->charger_type = DA9052_USB_CHARGER;
+ else
+ /* Else it has to be USB Host charger */
+ chg_device->charger_type = DA9052_USB_HUB;
+ } else {
+ chg_device->charger_type = DA9052_NOCHARGER;
+ /* Eqv to DISCHARGING_WITHOUT_CHARGER state */
+ chg_device->status = POWER_SUPPLY_STATUS_DISCHARGING;
+ }
+ if (chg_device->charger_type != DA9052_NOCHARGER) {
+ /* if Charging end flag is set and Charging current is greater
+ than charging end limit then battery is charging */
+ if ((msg.data & DA9052_STATUSB_CHGEND) != 0) {
+ if (da9052_bat_get_chg_current(chg_device,
+ &current_value))
+ return;
+ if (current_value >= chg_device->chg_end_current)
+ chg_device->status =
+ POWER_SUPPLY_STATUS_CHARGING;
+ else
+ /* Eqv to DISCHARGING_WITH_CHARGER state*/
+ chg_device->status =
+ POWER_SUPPLY_STATUS_NOT_CHARGING;
+ }
+ /* if Charging end flag is cleared then battery is charging */
+ else
+ chg_device->status = POWER_SUPPLY_STATUS_CHARGING;
+
+ if (POWER_SUPPLY_STATUS_CHARGING == chg_device->status) {
+ if (msg.data != DA9052_STATUSB_CHGPRE) {
+ /*
+ Measure battery voltage. if battery voltage
+ is greater than (VCHG_BAT - VCHG_DROP) then
+ battery is in the termintation mode.
+ */
+ if (da9052_bat_get_battery_voltage(chg_device,
+ &buffer))
+ return ;
+ if (buffer > (chg_device->bat_target_voltage -
+ chg_device->charger_voltage_drop) &&
+ (chg_device->cal_capacity >= 99))
+ chg_device->status =
+ POWER_SUPPLY_STATUS_FULL;
+ }
+ }
+ }
+
+ if (chg_device->illegal)
+ chg_device->health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ else if (chg_device->cal_capacity < chg_device->bat_capacity_limit_low)
+ chg_device->health = POWER_SUPPLY_HEALTH_DEAD;
+ else
+ chg_device->health = POWER_SUPPLY_HEALTH_GOOD;
+
+ if (chg_device->status != old_status)
+ power_supply_changed(&chg_device->psy);
+ return;
+}
+
+static s32 da9052_bat_suspend_charging(struct da9052_charger_device
*chg_device)
+{
+ struct da9052_ssc_msg msg;
+
+ if ((chg_device->status == POWER_SUPPLY_STATUS_DISCHARGING) ||
+ (chg_device->status == POWER_SUPPLY_STATUS_NOT_CHARGING))
+ return 0;
+
+ msg.addr = DA9052_INPUTCONT_REG;
+ msg.data = 0;
+ da9052_lock(chg_device->da9052);
+ /* Read Input condition register */
+ if (chg_device->da9052->read(chg_device->da9052, &msg)) {
+ da9052_unlock(chg_device->da9052);
+ return -EIO;
+ }
+
+ /* set both Wall charger and USB charger suspend bit */
+ msg.data = set_bits(msg.data, DA9052_INPUTCONT_DCINSUSP);
+ msg.data = set_bits(msg.data, DA9052_INPUTCONT_VBUSSUSP);
+
+ /* Write to Input control register */
+ if (chg_device->da9052->write(chg_device->da9052, &msg)) {
+ da9052_unlock(chg_device->da9052);
+ return -EIO;
+ }
+ da9052_unlock(chg_device->da9052);
+
+ return 0;
+}
+
+u32 interpolated(u32 vbat_lower, u32 vbat_upper, u32 level_lower,
+ u32 level_upper, u32 bat_voltage)
+{
+ s32 temp;
+ /*apply formula y= yk + (x - xk) * (yk+1 -yk)/(xk+1 -xk) */
+ temp = ((level_upper - level_lower) * 1000)/(vbat_upper - vbat_lower);
+ temp = level_lower + (((bat_voltage - vbat_lower) * temp)/1000);
+
+ return temp;
+}
+
+s32 capture_first_correct_vbat_sample(struct da9052_charger_device *chg_device,
+u16 *battery_voltage)
+{
+ static u8 count;
+ s32 ret = 0;
+ u32 temp_data = 0;
+
+ ret = da9052_bat_get_battery_voltage(chg_device,
+ &bat_volt_arr[count]);
+ if (ret)
+ return ret;
+ count++;
+
+ if (count < chg_device->vbat_first_valid_detect_iteration)
+ return -1;
+ for (count = 0; count <
+ (chg_device->vbat_first_valid_detect_iteration - 1);
+ count++) {
+ temp_data = (bat_volt_arr[count] *
+ (chg_device->hysteresis_window_size))/100;
+ bat_hysteresis.upper_limit = bat_volt_arr[count] + temp_data;
+ bat_hysteresis.lower_limit = bat_volt_arr[count] - temp_data;
+
+ if ((bat_volt_arr[count + 1] < bat_hysteresis.upper_limit) &&
+ (bat_volt_arr[count + 1] >
+ bat_hysteresis.lower_limit)) {
+ *battery_voltage = (bat_volt_arr[count] +
+ bat_volt_arr[count+1]) / 2;
+ hys_flag = TRUE;
+ return 0;
+ }
+ }
+
+ for (count = 0; count <
+ (chg_device->vbat_first_valid_detect_iteration - 1);
+ count++)
+ bat_volt_arr[count] = bat_volt_arr[count + 1];
+
+ return -1;
+}
+
+s32 check_hystersis(struct da9052_charger_device *chg_device, u16 *bat_voltage)
+{
+ u8 ret = 0;
+ u32 offset = 0;
+
+ /* Measure battery voltage using BAT internal function*/
+ if (hys_flag == FALSE) {
+ ret = capture_first_correct_vbat_sample
+ (chg_device, &array_hys_batvoltage[0]);
+ if (ret)
+ return ret;
+ }
+
+ ret = da9052_bat_get_battery_voltage
+ (chg_device, &array_hys_batvoltage[1]);[email protected]
+ if (ret)
+ return ret;
+ *bat_voltage = array_hys_batvoltage[1];
+
+ /* Check if measured battery voltage value is within the hysteresis
+ window limit using measured battey votlage value */
+ if ((bat_hysteresis.upper_limit < *bat_voltage) ||
+ (bat_hysteresis.lower_limit > *bat_voltage)) {
+
+ bat_hysteresis.index++;
+ if (bat_hysteresis.index ==
+ chg_device->hysteresis_no_of_reading) {
+ /* Hysteresis Window is set to +- of
+ HYSTERESIS_WINDOW_SIZE percentage of current VBAT */
+ bat_hysteresis.index = 0;
+ offset = ((*bat_voltage) *
+ chg_device->hysteresis_window_size)/
+ 100;
+ bat_hysteresis.upper_limit = (*bat_voltage) + offset;
+ bat_hysteresis.lower_limit = (*bat_voltage) - offset;
+ } else
+ return -EIO;
+ } else {
+ bat_hysteresis.index = 0;
+ offset = ((*bat_voltage) *
+ chg_device->hysteresis_window_size)/100;
+ bat_hysteresis.upper_limit = (*bat_voltage) + offset;
+ bat_hysteresis.lower_limit = (*bat_voltage) - offset;
+ }
+
+ /* Digital C Filter, formula Yn = k Yn-1 + (1-k) Xn */
+ *bat_voltage = ((chg_device->chg_hysteresis_const *
+ array_hys_batvoltage[0])/100) +
+ (((100 - chg_device->chg_hysteresis_const) *
+ array_hys_batvoltage[1])/100);
[email protected]
+ if ((chg_device->status == POWER_SUPPLY_STATUS_DISCHARGING) &&
+ (*bat_voltage > array_hys_batvoltage[0])) {
+ *bat_voltage = array_hys_batvoltage[0];
+ }
+
+ array_hys_batvoltage[0] = *bat_voltage;
+ return 0;
+}
+
+u8 select_temperature(u8 temp_index, u16 bat_temperature)
+{
+ u16 temp_temperature = 0;
+ temp_temperature = (temperature_lookup_ref[temp_index] +
+ temperature_lookup_ref[temp_index+1]) / 2;
+
+ if (bat_temperature >= temp_temperature) {
+ temp_index += 1;
+ return temp_index;
+ } else
+ return temp_index;
+}
+
+s32 da9052_bat_level_update(struct da9052_charger_device *chg_device)
+{
+ u16 bat_temperature;
+ u16 bat_voltage;
+ u32 vbat_lower, vbat_upper, level_upper, level_lower, level;
+ u8 access_index = 0;
+ u8 index = 0, ret;
+ u8 flag = FALSE;[email protected]
+
+ ret = 0;
+ vbat_lower = 0;
+ vbat_upper = 0;
+ level_upper = 0;
+ level_lower = 0;
+
+ ret = check_hystersis(chg_device, &bat_voltage);
+ if (ret)
+ return ret;
+
+ ret = da9052_bat_get_battery_temperature(chg_device,
+ &bat_temperature);
+ if (ret)
+ return ret;
+
+ for (index = 0; index < (DA9052_NO_OF_LOOKUP_TABLE-1); index++) {
+ if (bat_temperature <= temperature_lookup_ref[0]) {
+ access_index = 0;
+ break;
+ } else if (bat_temperature >
+ temperature_lookup_ref[DA9052_NO_OF_LOOKUP_TABLE]){
+ access_index = DA9052_NO_OF_LOOKUP_TABLE - 1;
+ break;
+ } else if ((bat_temperature >= temperature_lookup_ref[index]) &&
+ (bat_temperature >= temperature_lookup_ref[index+1])) {
+ access_index = select_temperature(index,
+ bat_temperature);
+ break;
+ }
+ }
+ if (bat_voltage >= vbat_vs_capacity_look_up[access_index][0][0]) {
+ chg_device->cal_capacity = 100;
+ return 0;
+ }
+ if (bat_voltage <=
vbat_vs_capacity_look_up[access_index][email protected]
+ [DA9052_LOOK_UP_TABLE_SIZE-1][0]){
+ chg_device->cal_capacity = 0;
+ return 0;
+ }
+ flag = FALSE;
+
+ for (index = 0; index < (DA9052_LOOK_UP_TABLE_SIZE-1); index++) {
+ if ((bat_voltage <=
+ vbat_vs_capacity_look_up[access_index][index][0]) &&
+ (bat_voltage >=
+ vbat_vs_capacity_look_up[access_index][index+1][0])) {
+ vbat_upper =
+ vbat_vs_capacity_look_up[access_index][index][0];
+ vbat_lower =
+ vbat_vs_capacity_look_up[access_index][index+1][0];
+ level_upper =
+ vbat_vs_capacity_look_up[access_index][index][1];
+ level_lower =
+ vbat_vs_capacity_look_up[access_index][index+1][1];
+ flag = TRUE;
+ break;
+ }
+ }
+ if (!flag)
+ return -EIO;
+
+ level = interpolated(vbat_lower, vbat_upper, level_lower,
+ level_upper, bat_voltage);
+ chg_device->cal_capacity = level;
+ return 0;
+}
+
+void da9052_bat_tbat_handler(struct da9052_eh_nb *eh_data, unsigned int event)
+{
+ struct da9052_charger_device *chg_device =
+ container_of(eh_data, struct da9052_charger_device, tbat_eh_data);
+
+ chg_device->health = POWER_SUPPLY_HEALTH_OVERHEAT;
+
+}
+
+static s32 da9052_bat_register_event(struct da9052_charger_device *chg_device)
+{
+ s32 ret;
+
+ if (event_status.da9052_event_tbat == FALSE) {
+ chg_device->tbat_eh_data.eve_type = TBAT_EVE;
+ chg_device->tbat_eh_data.call_back = da9052_bat_tbat_handler;
+ ret = chg_device->da9052->register_event_notifier
+ (chg_device->da9052, &chg_device->tbat_eh_data);
+ if (ret)
+ return -EIO;
+ event_status.da9052_event_tbat = TRUE;
+ }
+ return 0;
+}
+
+static s32 da9052_bat_unregister_event(struct da9052_charger_device
*chg_device)
+{
+ s32 ret;
+ if (event_status.da9052_event_tbat) {
+ ret =
+ chg_device->da9052->unregister_event_notifier
+ (chg_device->da9052, &chg_device->tbat_eh_data);
+ if (ret)
+ return -EIO;
+ event_status.da9052_event_tbat = FALSE;
+ }
+ return 0;
+}
+
+static int da9052_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct da9052_charger_device *chg_device =
+ container_of(psy, struct da9052_charger_device, psy);
+
+ /* Validate battery presence */
+ if (chg_device->illegal && psp != POWER_SUPPLY_PROP_PRESENT)
+ return -ENODEV;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = chg_device->status;
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval =
+ (chg_device->charger_type == DA9052_NOCHARGER) ? 0 : 1;
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = chg_device->illegal;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = chg_device->health;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = chg_device->bat_target_voltage * 1000;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ val->intval = chg_device->bat_volt_cutoff * 1000;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ val->intval = chg_device->bat_voltage * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ val->intval = chg_device->chg_current * 1000;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = chg_device->cal_capacity;
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ val->intval = bat_temp_reg_to_C(chg_device->bat_temp);
+ break;
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ val->intval = chg_device->technology;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ return 0;
+}
+
+
+static u8 detect_illegal_battery(struct da9052_charger_device *chg_device)
+{
+ u16 buffer = 0;
+ s32 ret = 0;
+
+ /* Measure battery temeperature */
+ ret = da9052_bat_get_battery_temperature(chg_device, &buffer);
+ if (ret)
+ return ret;
+
+ if (buffer > chg_device->bat_with_no_resistor)
+ chg_device->illegal = TRUE;
+ else
+ chg_device->illegal = FALSE;
+
+
+ /* suspend charging of battery if illegal battey is detected */
+ if (chg_device->illegal)
+ da9052_bat_suspend_charging(chg_device);
+
+ return chg_device->illegal;
+}
+
+void da9052_update_bat_properties(struct da9052_charger_device *chg_device)
+{
+ /* Get Bat status and type */
+ da9052_bat_status_update(chg_device);
+ da9052_bat_level_update(chg_device);
+}
+
+static void da9052_bat_external_power_changed(struct power_supply *psy)
+{[email protected]
+ struct da9052_charger_device *chg_device =
+ container_of(psy, struct da9052_charger_device, psy);
+
+ cancel_delayed_work(&chg_device->monitor_work);
+ queue_delayed_work(chg_device->monitor_wqueue,
+ &chg_device->monitor_work, HZ/10);
+}
+
+static void da9052_bat_work(struct work_struct *work)
+{
+ struct da9052_charger_device *chg_device = container_of(work,
+ struct da9052_charger_device, monitor_work.work);
+ da9052_update_bat_properties(chg_device);
+ queue_delayed_work(chg_device->monitor_wqueue,
+ &chg_device->monitor_work, HZ * 8);
+}
+
+static enum power_supply_property da9052_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+};
+
+static s32 __devinit da9052_bat_probe(struct platform_device *pdev)
+{
+ struct da9052_charger_device *chg_device;
+ u8 reg_data;
+ int ret;
+
+ chg_device = kzalloc(sizeof(*chg_device), GFP_KERNEL);
+ if (!chg_device)
+ return -ENOMEM;
+
+ chg_device->da9052 = dev_get_drvdata(pdev->dev.parent);
+ platform_set_drvdata(pdev, chg_device);
+ chg_device->psy.name = DA9052_BAT_DEVICE_NAME;
+ chg_device->psy.type = POWER_SUPPLY_TYPE_BATTERY;
+ chg_device->psy.properties = da9052_bat_props;
+ chg_device->psy.num_properties = ARRAY_SIZE(da9052_bat_props);
+ chg_device->psy.get_property = da9052_bat_get_property;
+ chg_device->psy.external_power_changed =
+ da9052_bat_external_power_changed;
+ chg_device->psy.use_for_apm = 1;
+ chg_device->charger_type = DA9052_NOCHARGER;
+ chg_device->status = POWER_SUPPLY_STATUS_UNKNOWN;
+ chg_device->health = POWER_SUPPLY_HEALTH_UNKNOWN;
+ chg_device->technology = POWER_SUPPLY_TECHNOLOGY_LION;
+ chg_device->bat_with_no_resistor = 62;
+ chg_device->bat_capacity_limit_low = 4;
+ chg_device->bat_capacity_limit_high = 70;
+ chg_device->bat_capacity_full = 100;
+ chg_device->bat_volt_cutoff = 2800;
+ chg_device->vbat_first_valid_detect_iteration = 3;
+ chg_device->hysteresis_window_size = 1;
+ chg_device->chg_hysteresis_const = 89;
+ chg_device->hysteresis_reading_interval = 1000;
+ chg_device->hysteresis_no_of_reading = 10;
+
+ ret = da9052_read(chg_device->da9052, DA9052_CHGCONT_REG, &reg_data);
+ if (ret)
+ goto err_charger_init;
+ chg_device->charger_voltage_drop = bat_drop_reg_to_mV(reg_data &&
+ DA9052_CHGCONT_TCTR);
+ chg_device->bat_target_voltage =
+ bat_reg_to_mV(reg_data && DA9052_CHGCONT_VCHGBAT);
+
+ ret = da9052_read(chg_device->da9052, DA9052_ICHGEND_REG, &reg_data);
+ if (ret)
+ goto err_charger_init;
+ chg_device->chg_end_current = ichg_reg_to_mA(reg_data);
+
+ bat_hysteresis.upper_limit = 0;
+ bat_hysteresis.lower_limit = 0;
+ bat_hysteresis.hys_flag = 0;
+ chg_device->illegal = FALSE;
+ detect_illegal_battery(chg_device);
+
+ da9052_bat_register_event(chg_device);
+ if (ret)
+ goto err_charger_init;
+
+ ret = power_supply_register(&pdev->dev, &chg_device->psy);
+ if (ret)
+ goto err_charger_init;
+
+ INIT_DELAYED_WORK(&chg_device->monitor_work, da9052_bat_work);
+ chg_device->monitor_wqueue =
+ create_singlethread_workqueue
+ (dev_name(&pdev->dev));
+ if (!chg_device->monitor_wqueue)
+ goto err_charger_init;
+ queue_delayed_work(chg_device->monitor_wqueue,
+ &chg_device->monitor_work, HZ * 1);
+ return 0;
+
+err_charger_init:
+ platform_set_drvdata(pdev, NULL);
+ kfree(chg_device);
+ return ret;
+}
+static int __devexit da9052_bat_remove(struct platform_device *dev)
+{
+ struct da9052_charger_device *chg_device = platform_get_drvdata(dev);
+ /* unregister the events.*/
+ da9052_bat_unregister_event(chg_device);
+ cancel_rearming_delayed_workqueue(chg_device->monitor_wqueue,
+ &chg_device->monitor_work);
+ destroy_workqueue(chg_device->monitor_wqueue);
+ power_supply_unregister(&chg_device->psy);
+ return 0;
+}
+
+static struct platform_driver da9052_bat_driver = {
+ .probe = da9052_bat_probe,
+ .remove = __devexit_p(da9052_bat_remove),
+ .driver.name = DA9052_BAT_DEVICE_NAME,
+ .driver.owner = THIS_MODULE,
+};
+
+static int __init da9052_bat_init(void)
+{
+ return platform_driver_register(&da9052_bat_driver);
+}
+
+static void __exit da9052_bat_exit(void)
+{
+ platform_driver_unregister(&da9052_bat_driver);
+}
+
+module_init(da9052_bat_init);
+module_exit(da9052_bat_exit);
+
+MODULE_AUTHOR("Dialog Semiconductor Ltd");
+MODULE_DESCRIPTION("DA9052 BAT Device Driver");
+MODULE_LICENSE("GPL");
diff -Naur A-source/drivers/power/Kconfig B-source/drivers/power/Kconfig
--- A-source/drivers/power/Kconfig 2010-05-17 02:17:36.000000000 +0500
+++ B-source/drivers/power/Kconfig 2010-12-08 15:12:56.000000000 +0500
@@ -117,6 +117,13 @@
Say Y here to enable support for batteries charger integrated into
DA9030 PMIC.

+config BATTERY_DA9052
+ tristate "Dialog DA9052 Battery"
+ depends on PMIC_DA9052
+ help
+ Say Y here to enable support for batteries charger integrated into
+ DA9052 PMIC.
+
config BATTERY_MAX17040
tristate "Maxim MAX17040 Fuel Gauge"
depends on I2C
diff -Naur A-source/drivers/power/Makefile B-source/drivers/power/Makefile
--- A-source/drivers/power/Makefile 2010-05-17 02:17:36.000000000 +0500
+++ B-source/drivers/power/Makefile 2010-12-08 15:12:56.000000000 +0500
@@ -30,5 +30,6 @@
obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
+obj-$(CONFIG_BATTERY_DA9052) += da9052-battery.o
obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
diff -Naur A-source/include/linux/mfd/da9052/bat.h
B-source/include/linux/mfd/da9052/bat.h
--- A-source/include/linux/mfd/da9052/bat.h 1970-01-01 05:00:00.000000000 +0500
+++ B-source/include/linux/mfd/da9052/bat.h 2010-12-08 15:19:19.000000000 +0500
@@ -0,0 +1,233 @@
+/*
+ * da9052 BAT module declarations.
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+ *
+ * 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.
+ *
+ */
+
+#ifndef __LINUX_MFD_DA9052_BAT_H
+#define __LINUX_MFD_DA9052_BAT_H
+
+#include <linux/power_supply.h>
+
+/* STATIC CONFIGURATION */
+#define DA9052_LOOK_UP_TABLE_SIZE 68
+#define DA9052_NO_OF_LOOKUP_TABLE 3
+#define FILTER_SIZE 4
+#define DA9052_NUMBER_OF_STORE_CURENT_READING 4
+
+static const u16 temperature_lookup_ref
+ [DA9052_NO_OF_LOOKUP_TABLE] = {10, 25, 40};
+static u32 const vbat_vs_capacity_look_up[DA9052_NO_OF_LOOKUP_TABLE]
+ [DA9052_LOOK_UP_TABLE_SIZE][2] = {
+ /* For temperature 10 degree celisus*/
+ {
+ {4082, 100}, {4036, 98},
+ {4020, 96}, {4008, 95},
+ {3997, 93}, {3983, 91},
+ {3964, 90}, {3943, 88},
+ {3926, 87}, {3912, 85},
+ {3900, 84}, {3890, 82},
+ {3881, 80}, {3873, 79},
+ {3865, 77}, {3857, 76},
+ {3848, 74}, {3839, 73},
+ {3829, 71}, {3820, 70},
+ {3811, 68}, {3802, 67},
+ {3794, 65}, {3785, 64},
+ {3778, 62}, {3770, 61},
+ {3763, 59}, {3756, 58},
+ {3750, 56}, {3744, 55},
+ {3738, 53}, {3732, 52},
+ {3727, 50}, {3722, 49},
+ {3717, 47}, {3712, 46},
+ {3708, 44}, {3703, 43},
+ {3700, 41}, {3696, 40},
+ {3693, 38}, {3691, 37},
+ {3688, 35}, {3686, 34},
+ {3683, 32}, {3681, 31},
+ {3678, 29}, {3675, 28},
+ {3672, 26}, {3669, 25},
+ {3665, 23}, {3661, 22},
+ {3656, 21}, {3651, 19},
+ {3645, 18}, {3639, 16},
+ {3631, 15}, {3622, 13},
+ {3611, 12}, {3600, 10},
+ {3587, 9}, {3572, 7},
+ {3548, 6}, {3503, 5},
+ {3420, 3}, {3268, 2},
+ {2992, 1}, {2746, 0}
+ },
+ /* For temperature 25 degree celisus */
+ {
+ {4102, 100}, {4065, 98},
+ {4048, 96}, {4034, 95},
+ {4021, 93}, {4011, 92},
+ {4001, 90}, {3986, 88},
+ {3968, 87}, {3952, 85},
+ {3938, 84}, {3926, 82},
+ {3916, 81}, {3908, 79},
+ {3900, 77}, {3892, 76},
+ {3883, 74}, {3874, 73},
+ {3864, 71}, {3855, 70},
+ {3846, 68}, {3836, 67},
+ {3827, 65}, {3819, 64},
+ {3810, 62}, {3801, 61},
+ {3793, 59}, {3786, 58},
+ {3778, 56}, {3772, 55},
+ {3765, 53}, {3759, 52},
+ {3754, 50}, {3748, 49},
+ {3743, 47}, {3738, 46},
+ {3733, 44}, {3728, 43},
+ {3724, 41}, {3720, 40},
+ {3716, 38}, {3712, 37},
+ {3709, 35}, {3706, 34},
+ {3703, 33}, {3701, 31},
+ {3698, 30}, {3696, 28},
+ {3693, 27}, {3690, 25},
+ {3687, 24}, {3683, 22},
+ {3680, 21}, {3675, 19},
+ {3671, 18}, {3666, 17},
+ {3660, 15}, {3654, 14},
+ {3647, 12}, {3639, 11},
+ {3630, 9}, {3621, 8},
+ {3613, 6}, {3606, 5},
+ {3597, 4}, {3582, 2},
+ {3546, 1}, {2747, 0}
+ },
+ /* For temperature 40 degree celisus*/
+ {
+ {4114, 100}, {4081, 98},
+ {4065, 96}, {4050, 95},
+ {4036, 93}, {4024, 92},
+ {4013, 90}, {4002, 88},
+ {3990, 87}, {3976, 85},
+ {3962, 84}, {3950, 82},
+ {3939, 81}, {3930, 79},
+ {3921, 77}, {3912, 76},
+ {3902, 74}, {3893, 73},
+ {3883, 71}, {3874, 70},
+ {3865, 68}, {3856, 67},
+ {3847, 65}, {3838, 64},
+ {3829, 62}, {3820, 61},
+ {3812, 59}, {3803, 58},
+ {3795, 56}, {3787, 55},
+ {3780, 53}, {3773, 52},
+ {3767, 50}, {3761, 49},
+ {3756, 47}, {3751, 46},
+ {3746, 44}, {3741, 43},
+ {3736, 41}, {3732, 40},
+ {3728, 38}, {3724, 37},
+ {3720, 35}, {3716, 34},
+ {3713, 33}, {3710, 31},
+ {3707, 30}, {3704, 28},
+ {3701, 27}, {3698, 25},
+ {3695, 24}, {3691, 22},
+ {3686, 21}, {3681, 19},
+ {3676, 18}, {3671, 17},
+ {3666, 15}, {3661, 14},
+ {3655, 12}, {3648, 11},
+ {3640, 9}, {3632, 8},
+ {3622, 6}, {3616, 5},
+ {3611, 4}, {3604, 2},
+ {3594, 1}, {2747, 0}
+ }
+};
+
+enum charger_type_enum {
+ DA9052_NOCHARGER = 1,
+ DA9052_USB_HUB,
+ DA9052_USB_CHARGER,
+ DA9052_WALL_CHARGER
+};
+
+struct da9052_bat_event_registration {
+ u8 da9052_event_tbat:1;
+};
+
+struct da9052_bat_hysteresis {
+ u16 bat_volt_arr[3];
+ u16 array_hys_batvoltage[2];
+ u16 upper_limit;
+ u16 lower_limit;
+ u8 index;
+ u8 hys_flag;
+};
+
+struct da9052_charger_device {
+ struct da9052 *da9052;
+ struct workqueue_struct *monitor_wqueue;
+ struct delayed_work monitor_work;
+ struct power_supply psy;
+ struct da9052_eh_nb tbat_eh_data;
+ u8 cal_capacity;
+ u8 charger_type;
+ u8 health;
+ u8 status;
+ u8 illegal;
+ u16 technology;
+ u16 chg_current;
+ u16 bat_voltage;
+ u16 bat_capacity_limit_low;
+ u16 bat_capacity_full;
+ u16 bat_capacity_limit_high;
+ u16 bat_volt_cutoff;
+ u16 bat_with_no_resistor;
+ u16 bat_temp;
+ u8 hys_flag;
+ u16 charger_voltage_drop;
+ u16 bat_target_voltage;
+ u16 chg_end_current;
+ u16 hysteresis_window_size;
+ u16 chg_hysteresis_const;
+ u16 hysteresis_reading_interval;
+ u16 hysteresis_no_of_reading;
+ u16 vbat_first_valid_detect_iteration;
+};
+
+static inline u8 bat_temp_reg_to_C(u16 value) { return (55 - value); }
+static inline u8 bat_mV_to_reg(u16 value) { return (((value-4100)/100)<<4); }
+static inline u8 bat_drop_mV_to_reg(u16 value)
+ { return (((value-100)/100)<<6); }
+static inline u16 bat_reg_to_mV(u8 value) { return ((value*100) + 4100); }
+static inline u16 bat_drop_reg_to_mV(u8 value) { return ((value*100)+100); }
+static inline u8 vch_thr_mV_to_reg(u16 value) { return ((value-3700)/100); }
+static inline u8 precharge_mA_to_reg(u8 value) { return ((value/20)<<6); }
+static inline u8 vddout_mon_mV_to_reg(u16 value)
+ { return (((value-2500)*128)/1000); }
+static inline u16 vddout_reg_to_mV(u8 value)
+ { return ((value*1000)/128)+2500; }
+static inline u16 volt_reg_to_mV(u16 value)
+ { return ((value*1000)/512)+2500; }
+static inline u8 ichg_mA_to_reg(u16 value) { return (value/4); }
+static inline u16 ichg_reg_to_mA(u8 value) { return ((value*3900)/1000); }
+static inline u8 iset_mA_to_reg(u16 iset_value)
+ {\
+ if ((70 <= iset_value) && (iset_value <= 120)) \
+ return (iset_value-70)/10; \
+ else if ((400 <= iset_value) && (iset_value <= 700)) \
+ return ((iset_value-400)/50)+6; \
+ else if ((900 <= iset_value) && (iset_value <= 1300)) \
+ return ((iset_value-900)/200)+13; else return 0;
+ }
+
+#define TRUE 1
+#define FALSE 0
+
+#define set_bits(value, mask) (value | mask)
+#define clear_bits(value, mask) (value & ~(mask))
+
+#endif /* __LINUX_MFD_DA9052_BAT_H */