--- /dev/null
- u8 addr, u32 *data, int size)
+/*
+ * Fuel gauge driver for Maxim 17042 / 8966 / 8997
+ * Note that Maxim 8966 and 8997 are mfd and this is its subdevice.
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * MyungJoo Ham <myungjoo.ham@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This driver is based on max17040_battery.c
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/pm.h>
+#include <linux/mod_devicetable.h>
+#include <linux/power_supply.h>
+#include <linux/power/max17042_battery.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+/* Status register bits */
+#define STATUS_POR_BIT (1 << 1)
+#define STATUS_BST_BIT (1 << 3)
+#define STATUS_VMN_BIT (1 << 8)
+#define STATUS_TMN_BIT (1 << 9)
+#define STATUS_SMN_BIT (1 << 10)
+#define STATUS_BI_BIT (1 << 11)
+#define STATUS_VMX_BIT (1 << 12)
+#define STATUS_TMX_BIT (1 << 13)
+#define STATUS_SMX_BIT (1 << 14)
+#define STATUS_BR_BIT (1 << 15)
+
+/* Interrupt mask bits */
+#define CONFIG_ALRT_BIT_ENBL (1 << 2)
+#define STATUS_INTR_SOCMIN_BIT (1 << 10)
+#define STATUS_INTR_SOCMAX_BIT (1 << 14)
+
+#define VFSOC0_LOCK 0x0000
+#define VFSOC0_UNLOCK 0x0080
+#define MODEL_UNLOCK1 0X0059
+#define MODEL_UNLOCK2 0X00C4
+#define MODEL_LOCK1 0X0000
+#define MODEL_LOCK2 0X0000
+
+#define dQ_ACC_DIV 0x4
+#define dP_ACC_100 0x1900
+#define dP_ACC_200 0x3200
+
+#define MAX17042_VMAX_TOLERANCE 50 /* 50 mV */
+
+struct max17042_chip {
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct power_supply *battery;
+ enum max170xx_chip_type chip_type;
+ struct max17042_platform_data *pdata;
+ struct work_struct work;
+ int init_complete;
+};
+
+static enum power_supply_property max17042_battery_props[] = {
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_CYCLE_COUNT,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_VOLTAGE_OCV,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CHARGE_FULL,
+ POWER_SUPPLY_PROP_CHARGE_COUNTER,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
+ POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
+ POWER_SUPPLY_PROP_TEMP_MIN,
+ POWER_SUPPLY_PROP_TEMP_MAX,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+};
+
+static int max17042_get_temperature(struct max17042_chip *chip, int *temp)
+{
+ int ret;
+ u32 data;
+ struct regmap *map = chip->regmap;
+
+ ret = regmap_read(map, MAX17042_TEMP, &data);
+ if (ret < 0)
+ return ret;
+
+ *temp = data;
+ /* The value is signed. */
+ if (*temp & 0x8000) {
+ *temp = (0x7fff & ~*temp) + 1;
+ *temp *= -1;
+ }
+
+ /* The value is converted into deci-centigrade scale */
+ /* Units of LSB = 1 / 256 degree Celsius */
+ *temp = *temp * 10 / 256;
+ return 0;
+}
+
+static int max17042_get_battery_health(struct max17042_chip *chip, int *health)
+{
+ int temp, vavg, vbatt, ret;
+ u32 val;
+
+ ret = regmap_read(chip->regmap, MAX17042_AvgVCELL, &val);
+ if (ret < 0)
+ goto health_error;
+
+ /* bits [0-3] unused */
+ vavg = val * 625 / 8;
+ /* Convert to millivolts */
+ vavg /= 1000;
+
+ ret = regmap_read(chip->regmap, MAX17042_VCELL, &val);
+ if (ret < 0)
+ goto health_error;
+
+ /* bits [0-3] unused */
+ vbatt = val * 625 / 8;
+ /* Convert to millivolts */
+ vbatt /= 1000;
+
+ if (vavg < chip->pdata->vmin) {
+ *health = POWER_SUPPLY_HEALTH_DEAD;
+ goto out;
+ }
+
+ if (vbatt > chip->pdata->vmax + MAX17042_VMAX_TOLERANCE) {
+ *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ goto out;
+ }
+
+ ret = max17042_get_temperature(chip, &temp);
+ if (ret < 0)
+ goto health_error;
+
+ if (temp <= chip->pdata->temp_min) {
+ *health = POWER_SUPPLY_HEALTH_COLD;
+ goto out;
+ }
+
+ if (temp >= chip->pdata->temp_max) {
+ *health = POWER_SUPPLY_HEALTH_OVERHEAT;
+ goto out;
+ }
+
+ *health = POWER_SUPPLY_HEALTH_GOOD;
+
+out:
+ return 0;
+
+health_error:
+ return ret;
+}
+
+static int max17042_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct max17042_chip *chip = power_supply_get_drvdata(psy);
+ struct regmap *map = chip->regmap;
+ int ret;
+ u32 data;
+
+ if (!chip->init_complete)
+ return -EAGAIN;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ ret = regmap_read(map, MAX17042_STATUS, &data);
+ if (ret < 0)
+ return ret;
+
+ if (data & MAX17042_STATUS_BattAbsent)
+ val->intval = 0;
+ else
+ val->intval = 1;
+ break;
+ case POWER_SUPPLY_PROP_CYCLE_COUNT:
+ ret = regmap_read(map, MAX17042_Cycles, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ ret = regmap_read(map, MAX17042_MinMaxVolt, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data >> 8;
+ val->intval *= 20000; /* Units of LSB = 20mV */
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17042)
+ ret = regmap_read(map, MAX17042_V_empty, &data);
+ else
+ ret = regmap_read(map, MAX17047_V_empty, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data >> 7;
+ val->intval *= 10000; /* Units of LSB = 10mV */
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = regmap_read(map, MAX17042_VCELL, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data * 625 / 8;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ ret = regmap_read(map, MAX17042_AvgVCELL, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data * 625 / 8;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_OCV:
+ ret = regmap_read(map, MAX17042_OCVInternal, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data * 625 / 8;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ ret = regmap_read(map, MAX17042_RepSOC, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data >> 8;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_FULL:
+ ret = regmap_read(map, MAX17042_FullCAP, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data * 1000 / 2;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+ ret = regmap_read(map, MAX17042_QH, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data * 1000 / 2;
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ ret = max17042_get_temperature(chip, &val->intval);
+ if (ret < 0)
+ return ret;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
+ ret = regmap_read(map, MAX17042_TALRT_Th, &data);
+ if (ret < 0)
+ return ret;
+ /* LSB is Alert Minimum. In deci-centigrade */
+ val->intval = (data & 0xff) * 10;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
+ ret = regmap_read(map, MAX17042_TALRT_Th, &data);
+ if (ret < 0)
+ return ret;
+ /* MSB is Alert Maximum. In deci-centigrade */
+ val->intval = (data >> 8) * 10;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_MIN:
+ val->intval = chip->pdata->temp_min;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_MAX:
+ val->intval = chip->pdata->temp_max;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ ret = max17042_get_battery_health(chip, &val->intval);
+ if (ret < 0)
+ return ret;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ if (chip->pdata->enable_current_sense) {
+ ret = regmap_read(map, MAX17042_Current, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data;
+ if (val->intval & 0x8000) {
+ /* Negative */
+ val->intval = ~val->intval & 0x7fff;
+ val->intval++;
+ val->intval *= -1;
+ }
+ val->intval *= 1562500 / chip->pdata->r_sns;
+ } else {
+ return -EINVAL;
+ }
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ if (chip->pdata->enable_current_sense) {
+ ret = regmap_read(map, MAX17042_AvgCurrent, &data);
+ if (ret < 0)
+ return ret;
+
+ val->intval = data;
+ if (val->intval & 0x8000) {
+ /* Negative */
+ val->intval = ~val->intval & 0x7fff;
+ val->intval++;
+ val->intval *= -1;
+ }
+ val->intval *= 1562500 / chip->pdata->r_sns;
+ } else {
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int max17042_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct max17042_chip *chip = power_supply_get_drvdata(psy);
+ struct regmap *map = chip->regmap;
+ int ret = 0;
+ u32 data;
+ int8_t temp;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
+ ret = regmap_read(map, MAX17042_TALRT_Th, &data);
+ if (ret < 0)
+ return ret;
+
+ /* Input in deci-centigrade, convert to centigrade */
+ temp = val->intval / 10;
+ /* force min < max */
+ if (temp >= (int8_t)(data >> 8))
+ temp = (int8_t)(data >> 8) - 1;
+ /* Write both MAX and MIN ALERT */
+ data = (data & 0xff00) + temp;
+ ret = regmap_write(map, MAX17042_TALRT_Th, data);
+ break;
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
+ ret = regmap_read(map, MAX17042_TALRT_Th, &data);
+ if (ret < 0)
+ return ret;
+
+ /* Input in Deci-Centigrade, convert to centigrade */
+ temp = val->intval / 10;
+ /* force max > min */
+ if (temp <= (int8_t)(data & 0xff))
+ temp = (int8_t)(data & 0xff) + 1;
+ /* Write both MAX and MIN ALERT */
+ data = (data & 0xff) + (temp << 8);
+ ret = regmap_write(map, MAX17042_TALRT_Th, data);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int max17042_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
+ ret = 1;
+ break;
+ default:
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static int max17042_write_verify_reg(struct regmap *map, u8 reg, u32 value)
+{
+ int retries = 8;
+ int ret;
+ u32 read_value;
+
+ do {
+ ret = regmap_write(map, reg, value);
+ regmap_read(map, reg, &read_value);
+ if (read_value != value) {
+ ret = -EIO;
+ retries--;
+ }
+ } while (retries && read_value != value);
+
+ if (ret < 0)
+ pr_err("%s: err %d\n", __func__, ret);
+
+ return ret;
+}
+
+static inline void max17042_override_por(struct regmap *map,
+ u8 reg, u16 value)
+{
+ if (value)
+ regmap_write(map, reg, value);
+}
+
+static inline void max10742_unlock_model(struct max17042_chip *chip)
+{
+ struct regmap *map = chip->regmap;
+
+ regmap_write(map, MAX17042_MLOCKReg1, MODEL_UNLOCK1);
+ regmap_write(map, MAX17042_MLOCKReg2, MODEL_UNLOCK2);
+}
+
+static inline void max10742_lock_model(struct max17042_chip *chip)
+{
+ struct regmap *map = chip->regmap;
+
+ regmap_write(map, MAX17042_MLOCKReg1, MODEL_LOCK1);
+ regmap_write(map, MAX17042_MLOCKReg2, MODEL_LOCK2);
+}
+
+static inline void max17042_write_model_data(struct max17042_chip *chip,
+ u8 addr, int size)
+{
+ struct regmap *map = chip->regmap;
+ int i;
+
+ for (i = 0; i < size; i++)
+ regmap_write(map, addr + i,
+ chip->pdata->config_data->cell_char_tbl[i]);
+}
+
+static inline void max17042_read_model_data(struct max17042_chip *chip,
- for (i = 0; i < size; i++)
- regmap_read(map, addr + i, &data[i]);
++ u8 addr, u16 *data, int size)
+{
+ struct regmap *map = chip->regmap;
+ int i;
++ u32 tmp;
+
- u32 *temp_data;
++ for (i = 0; i < size; i++) {
++ regmap_read(map, addr + i, &tmp);
++ data[i] = (u16)tmp;
++ }
+}
+
+static inline int max17042_model_data_compare(struct max17042_chip *chip,
+ u16 *data1, u16 *data2, int size)
+{
+ int i;
+
+ if (memcmp(data1, data2, size)) {
+ dev_err(&chip->client->dev, "%s compare failed\n", __func__);
+ for (i = 0; i < size; i++)
+ dev_info(&chip->client->dev, "0x%x, 0x%x",
+ data1[i], data2[i]);
+ dev_info(&chip->client->dev, "\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int max17042_init_model(struct max17042_chip *chip)
+{
+ int ret;
+ int table_size = ARRAY_SIZE(chip->pdata->config_data->cell_char_tbl);
- (u16 *)temp_data,
++ u16 *temp_data;
+
+ temp_data = kcalloc(table_size, sizeof(*temp_data), GFP_KERNEL);
+ if (!temp_data)
+ return -ENOMEM;
+
+ max10742_unlock_model(chip);
+ max17042_write_model_data(chip, MAX17042_MODELChrTbl,
+ table_size);
+ max17042_read_model_data(chip, MAX17042_MODELChrTbl, temp_data,
+ table_size);
+
+ ret = max17042_model_data_compare(
+ chip,
+ chip->pdata->config_data->cell_char_tbl,
- u32 *temp_data;
++ temp_data,
+ table_size);
+
+ max10742_lock_model(chip);
+ kfree(temp_data);
+
+ return ret;
+}
+
+static int max17042_verify_model_lock(struct max17042_chip *chip)
+{
+ int i;
+ int table_size = ARRAY_SIZE(chip->pdata->config_data->cell_char_tbl);
++ u16 *temp_data;
+ int ret = 0;
+
+ temp_data = kcalloc(table_size, sizeof(*temp_data), GFP_KERNEL);
+ if (!temp_data)
+ return -ENOMEM;
+
+ max17042_read_model_data(chip, MAX17042_MODELChrTbl, temp_data,
+ table_size);
+ for (i = 0; i < table_size; i++)
+ if (temp_data[i])
+ ret = -EINVAL;
+
+ kfree(temp_data);
+ return ret;
+}
+
+static void max17042_write_config_regs(struct max17042_chip *chip)
+{
+ struct max17042_config_data *config = chip->pdata->config_data;
+ struct regmap *map = chip->regmap;
+
+ regmap_write(map, MAX17042_CONFIG, config->config);
+ regmap_write(map, MAX17042_LearnCFG, config->learn_cfg);
+ regmap_write(map, MAX17042_FilterCFG,
+ config->filter_cfg);
+ regmap_write(map, MAX17042_RelaxCFG, config->relax_cfg);
+ if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17047 ||
+ chip->chip_type == MAXIM_DEVICE_TYPE_MAX17050)
+ regmap_write(map, MAX17047_FullSOCThr,
+ config->full_soc_thresh);
+}
+
+static void max17042_write_custom_regs(struct max17042_chip *chip)
+{
+ struct max17042_config_data *config = chip->pdata->config_data;
+ struct regmap *map = chip->regmap;
+
+ max17042_write_verify_reg(map, MAX17042_RCOMP0, config->rcomp0);
+ max17042_write_verify_reg(map, MAX17042_TempCo, config->tcompc0);
+ max17042_write_verify_reg(map, MAX17042_ICHGTerm, config->ichgt_term);
+ if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17042) {
+ regmap_write(map, MAX17042_EmptyTempCo, config->empty_tempco);
+ max17042_write_verify_reg(map, MAX17042_K_empty0,
+ config->kempty0);
+ } else {
+ max17042_write_verify_reg(map, MAX17047_QRTbl00,
+ config->qrtbl00);
+ max17042_write_verify_reg(map, MAX17047_QRTbl10,
+ config->qrtbl10);
+ max17042_write_verify_reg(map, MAX17047_QRTbl20,
+ config->qrtbl20);
+ max17042_write_verify_reg(map, MAX17047_QRTbl30,
+ config->qrtbl30);
+ }
+}
+
+static void max17042_update_capacity_regs(struct max17042_chip *chip)
+{
+ struct max17042_config_data *config = chip->pdata->config_data;
+ struct regmap *map = chip->regmap;
+
+ max17042_write_verify_reg(map, MAX17042_FullCAP,
+ config->fullcap);
+ regmap_write(map, MAX17042_DesignCap, config->design_cap);
+ max17042_write_verify_reg(map, MAX17042_FullCAPNom,
+ config->fullcapnom);
+}
+
+static void max17042_reset_vfsoc0_reg(struct max17042_chip *chip)
+{
+ unsigned int vfSoc;
+ struct regmap *map = chip->regmap;
+
+ regmap_read(map, MAX17042_VFSOC, &vfSoc);
+ regmap_write(map, MAX17042_VFSOC0Enable, VFSOC0_UNLOCK);
+ max17042_write_verify_reg(map, MAX17042_VFSOC0, vfSoc);
+ regmap_write(map, MAX17042_VFSOC0Enable, VFSOC0_LOCK);
+}
+
+static void max17042_load_new_capacity_params(struct max17042_chip *chip)
+{
+ u32 full_cap0, rep_cap, dq_acc, vfSoc;
+ u32 rem_cap;
+
+ struct max17042_config_data *config = chip->pdata->config_data;
+ struct regmap *map = chip->regmap;
+
+ regmap_read(map, MAX17042_FullCAP0, &full_cap0);
+ regmap_read(map, MAX17042_VFSOC, &vfSoc);
+
+ /* fg_vfSoc needs to shifted by 8 bits to get the
+ * perc in 1% accuracy, to get the right rem_cap multiply
+ * full_cap0, fg_vfSoc and devide by 100
+ */
+ rem_cap = ((vfSoc >> 8) * full_cap0) / 100;
+ max17042_write_verify_reg(map, MAX17042_RemCap, rem_cap);
+
+ rep_cap = rem_cap;
+ max17042_write_verify_reg(map, MAX17042_RepCap, rep_cap);
+
+ /* Write dQ_acc to 200% of Capacity and dP_acc to 200% */
+ dq_acc = config->fullcap / dQ_ACC_DIV;
+ max17042_write_verify_reg(map, MAX17042_dQacc, dq_acc);
+ max17042_write_verify_reg(map, MAX17042_dPacc, dP_ACC_200);
+
+ max17042_write_verify_reg(map, MAX17042_FullCAP,
+ config->fullcap);
+ regmap_write(map, MAX17042_DesignCap,
+ config->design_cap);
+ max17042_write_verify_reg(map, MAX17042_FullCAPNom,
+ config->fullcapnom);
+ /* Update SOC register with new SOC */
+ regmap_write(map, MAX17042_RepSOC, vfSoc);
+}
+
+/*
+ * Block write all the override values coming from platform data.
+ * This function MUST be called before the POR initialization proceedure
+ * specified by maxim.
+ */
+static inline void max17042_override_por_values(struct max17042_chip *chip)
+{
+ struct regmap *map = chip->regmap;
+ struct max17042_config_data *config = chip->pdata->config_data;
+
+ max17042_override_por(map, MAX17042_TGAIN, config->tgain);
+ max17042_override_por(map, MAx17042_TOFF, config->toff);
+ max17042_override_por(map, MAX17042_CGAIN, config->cgain);
+ max17042_override_por(map, MAX17042_COFF, config->coff);
+
+ max17042_override_por(map, MAX17042_VALRT_Th, config->valrt_thresh);
+ max17042_override_por(map, MAX17042_TALRT_Th, config->talrt_thresh);
+ max17042_override_por(map, MAX17042_SALRT_Th,
+ config->soc_alrt_thresh);
+ max17042_override_por(map, MAX17042_CONFIG, config->config);
+ max17042_override_por(map, MAX17042_SHDNTIMER, config->shdntimer);
+
+ max17042_override_por(map, MAX17042_DesignCap, config->design_cap);
+ max17042_override_por(map, MAX17042_ICHGTerm, config->ichgt_term);
+
+ max17042_override_por(map, MAX17042_AtRate, config->at_rate);
+ max17042_override_por(map, MAX17042_LearnCFG, config->learn_cfg);
+ max17042_override_por(map, MAX17042_FilterCFG, config->filter_cfg);
+ max17042_override_por(map, MAX17042_RelaxCFG, config->relax_cfg);
+ max17042_override_por(map, MAX17042_MiscCFG, config->misc_cfg);
+ max17042_override_por(map, MAX17042_MaskSOC, config->masksoc);
+
+ max17042_override_por(map, MAX17042_FullCAP, config->fullcap);
+ max17042_override_por(map, MAX17042_FullCAPNom, config->fullcapnom);
+ if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17042)
+ max17042_override_por(map, MAX17042_SOC_empty,
+ config->socempty);
+ max17042_override_por(map, MAX17042_LAvg_empty, config->lavg_empty);
+ max17042_override_por(map, MAX17042_dQacc, config->dqacc);
+ max17042_override_por(map, MAX17042_dPacc, config->dpacc);
+
+ if (chip->chip_type == MAXIM_DEVICE_TYPE_MAX17042)
+ max17042_override_por(map, MAX17042_V_empty, config->vempty);
+ else
+ max17042_override_por(map, MAX17047_V_empty, config->vempty);
+ max17042_override_por(map, MAX17042_TempNom, config->temp_nom);
+ max17042_override_por(map, MAX17042_TempLim, config->temp_lim);
+ max17042_override_por(map, MAX17042_FCTC, config->fctc);
+ max17042_override_por(map, MAX17042_RCOMP0, config->rcomp0);
+ max17042_override_por(map, MAX17042_TempCo, config->tcompc0);
+ if (chip->chip_type) {
+ max17042_override_por(map, MAX17042_EmptyTempCo,
+ config->empty_tempco);
+ max17042_override_por(map, MAX17042_K_empty0,
+ config->kempty0);
+ }
+}
+
+static int max17042_init_chip(struct max17042_chip *chip)
+{
+ struct regmap *map = chip->regmap;
+ int ret;
+
+ max17042_override_por_values(chip);
+ /* After Power up, the MAX17042 requires 500mS in order
+ * to perform signal debouncing and initial SOC reporting
+ */
+ msleep(500);
+
+ /* Initialize configaration */
+ max17042_write_config_regs(chip);
+
+ /* write cell characterization data */
+ ret = max17042_init_model(chip);
+ if (ret) {
+ dev_err(&chip->client->dev, "%s init failed\n",
+ __func__);
+ return -EIO;
+ }
+
+ ret = max17042_verify_model_lock(chip);
+ if (ret) {
+ dev_err(&chip->client->dev, "%s lock verify failed\n",
+ __func__);
+ return -EIO;
+ }
+ /* write custom parameters */
+ max17042_write_custom_regs(chip);
+
+ /* update capacity params */
+ max17042_update_capacity_regs(chip);
+
+ /* delay must be atleast 350mS to allow VFSOC
+ * to be calculated from the new configuration
+ */
+ msleep(350);
+
+ /* reset vfsoc0 reg */
+ max17042_reset_vfsoc0_reg(chip);
+
+ /* load new capacity params */
+ max17042_load_new_capacity_params(chip);
+
+ /* Init complete, Clear the POR bit */
+ regmap_update_bits(map, MAX17042_STATUS, STATUS_POR_BIT, 0x0);
+ return 0;
+}
+
+static void max17042_set_soc_threshold(struct max17042_chip *chip, u16 off)
+{
+ struct regmap *map = chip->regmap;
+ u32 soc, soc_tr;
+
+ /* program interrupt thesholds such that we should
+ * get interrupt for every 'off' perc change in the soc
+ */
+ regmap_read(map, MAX17042_RepSOC, &soc);
+ soc >>= 8;
+ soc_tr = (soc + off) << 8;
+ soc_tr |= (soc - off);
+ regmap_write(map, MAX17042_SALRT_Th, soc_tr);
+}
+
+static irqreturn_t max17042_thread_handler(int id, void *dev)
+{
+ struct max17042_chip *chip = dev;
+ u32 val;
+
+ regmap_read(chip->regmap, MAX17042_STATUS, &val);
+ if ((val & STATUS_INTR_SOCMIN_BIT) ||
+ (val & STATUS_INTR_SOCMAX_BIT)) {
+ dev_info(&chip->client->dev, "SOC threshold INTR\n");
+ max17042_set_soc_threshold(chip, 1);
+ }
+
+ power_supply_changed(chip->battery);
+ return IRQ_HANDLED;
+}
+
+static void max17042_init_worker(struct work_struct *work)
+{
+ struct max17042_chip *chip = container_of(work,
+ struct max17042_chip, work);
+ int ret;
+
+ /* Initialize registers according to values from the platform data */
+ if (chip->pdata->enable_por_init && chip->pdata->config_data) {
+ ret = max17042_init_chip(chip);
+ if (ret)
+ return;
+ }
+
+ chip->init_complete = 1;
+}
+
+#ifdef CONFIG_OF
+static struct max17042_platform_data *
+max17042_get_pdata(struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ u32 prop;
+ struct max17042_platform_data *pdata;
+
+ if (!np)
+ return dev->platform_data;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ /*
+ * Require current sense resistor value to be specified for
+ * current-sense functionality to be enabled at all.
+ */
+ if (of_property_read_u32(np, "maxim,rsns-microohm", &prop) == 0) {
+ pdata->r_sns = prop;
+ pdata->enable_current_sense = true;
+ }
+
+ if (of_property_read_s32(np, "maxim,cold-temp", &pdata->temp_min))
+ pdata->temp_min = INT_MIN;
+ if (of_property_read_s32(np, "maxim,over-heat-temp", &pdata->temp_max))
+ pdata->temp_max = INT_MAX;
+ if (of_property_read_s32(np, "maxim,dead-volt", &pdata->vmin))
+ pdata->vmin = INT_MIN;
+ if (of_property_read_s32(np, "maxim,over-volt", &pdata->vmax))
+ pdata->vmax = INT_MAX;
+
+ return pdata;
+}
+#else
+static struct max17042_platform_data *
+max17042_get_pdata(struct device *dev)
+{
+ return dev->platform_data;
+}
+#endif
+
+static const struct regmap_config max17042_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 16,
+ .val_format_endian = REGMAP_ENDIAN_NATIVE,
+};
+
+static const struct power_supply_desc max17042_psy_desc = {
+ .name = "max170xx_battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .get_property = max17042_get_property,
+ .set_property = max17042_set_property,
+ .property_is_writeable = max17042_property_is_writeable,
+ .properties = max17042_battery_props,
+ .num_properties = ARRAY_SIZE(max17042_battery_props),
+};
+
+static const struct power_supply_desc max17042_no_current_sense_psy_desc = {
+ .name = "max170xx_battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .get_property = max17042_get_property,
+ .set_property = max17042_set_property,
+ .property_is_writeable = max17042_property_is_writeable,
+ .properties = max17042_battery_props,
+ .num_properties = ARRAY_SIZE(max17042_battery_props) - 2,
+};
+
+static int max17042_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ const struct power_supply_desc *max17042_desc = &max17042_psy_desc;
+ struct power_supply_config psy_cfg = {};
+ struct max17042_chip *chip;
+ int ret;
+ int i;
+ u32 val;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
+ return -EIO;
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->client = client;
+ chip->regmap = devm_regmap_init_i2c(client, &max17042_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ dev_err(&client->dev, "Failed to initialize regmap\n");
+ return -EINVAL;
+ }
+
+ chip->pdata = max17042_get_pdata(&client->dev);
+ if (!chip->pdata) {
+ dev_err(&client->dev, "no platform data provided\n");
+ return -EINVAL;
+ }
+
+ i2c_set_clientdata(client, chip);
+ chip->chip_type = id->driver_data;
+ psy_cfg.drv_data = chip;
+
+ /* When current is not measured,
+ * CURRENT_NOW and CURRENT_AVG properties should be invisible. */
+ if (!chip->pdata->enable_current_sense)
+ max17042_desc = &max17042_no_current_sense_psy_desc;
+
+ if (chip->pdata->r_sns == 0)
+ chip->pdata->r_sns = MAX17042_DEFAULT_SNS_RESISTOR;
+
+ if (chip->pdata->init_data)
+ for (i = 0; i < chip->pdata->num_init_data; i++)
+ regmap_write(chip->regmap,
+ chip->pdata->init_data[i].addr,
+ chip->pdata->init_data[i].data);
+
+ if (!chip->pdata->enable_current_sense) {
+ regmap_write(chip->regmap, MAX17042_CGAIN, 0x0000);
+ regmap_write(chip->regmap, MAX17042_MiscCFG, 0x0003);
+ regmap_write(chip->regmap, MAX17042_LearnCFG, 0x0007);
+ }
+
+ chip->battery = devm_power_supply_register(&client->dev, max17042_desc,
+ &psy_cfg);
+ if (IS_ERR(chip->battery)) {
+ dev_err(&client->dev, "failed: power supply register\n");
+ return PTR_ERR(chip->battery);
+ }
+
+ if (client->irq) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL,
+ max17042_thread_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ chip->battery->desc->name,
+ chip);
+ if (!ret) {
+ regmap_update_bits(chip->regmap, MAX17042_CONFIG,
+ CONFIG_ALRT_BIT_ENBL,
+ CONFIG_ALRT_BIT_ENBL);
+ max17042_set_soc_threshold(chip, 1);
+ } else {
+ client->irq = 0;
+ dev_err(&client->dev, "%s(): cannot get IRQ\n",
+ __func__);
+ }
+ }
+
+ regmap_read(chip->regmap, MAX17042_STATUS, &val);
+ if (val & STATUS_POR_BIT) {
+ INIT_WORK(&chip->work, max17042_init_worker);
+ schedule_work(&chip->work);
+ } else {
+ chip->init_complete = 1;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int max17042_suspend(struct device *dev)
+{
+ struct max17042_chip *chip = dev_get_drvdata(dev);
+
+ /*
+ * disable the irq and enable irq_wake
+ * capability to the interrupt line.
+ */
+ if (chip->client->irq) {
+ disable_irq(chip->client->irq);
+ enable_irq_wake(chip->client->irq);
+ }
+
+ return 0;
+}
+
+static int max17042_resume(struct device *dev)
+{
+ struct max17042_chip *chip = dev_get_drvdata(dev);
+
+ if (chip->client->irq) {
+ disable_irq_wake(chip->client->irq);
+ enable_irq(chip->client->irq);
+ /* re-program the SOC thresholds to 1% change */
+ max17042_set_soc_threshold(chip, 1);
+ }
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(max17042_pm_ops, max17042_suspend,
+ max17042_resume);
+
+#ifdef CONFIG_OF
+static const struct of_device_id max17042_dt_match[] = {
+ { .compatible = "maxim,max17042" },
+ { .compatible = "maxim,max17047" },
+ { .compatible = "maxim,max17050" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, max17042_dt_match);
+#endif
+
+static const struct i2c_device_id max17042_id[] = {
+ { "max17042", MAXIM_DEVICE_TYPE_MAX17042 },
+ { "max17047", MAXIM_DEVICE_TYPE_MAX17047 },
+ { "max17050", MAXIM_DEVICE_TYPE_MAX17050 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max17042_id);
+
+static struct i2c_driver max17042_i2c_driver = {
+ .driver = {
+ .name = "max17042",
+ .of_match_table = of_match_ptr(max17042_dt_match),
+ .pm = &max17042_pm_ops,
+ },
+ .probe = max17042_probe,
+ .id_table = max17042_id,
+};
+module_i2c_driver(max17042_i2c_driver);
+
+MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
+MODULE_DESCRIPTION("MAX17042 Fuel Gauge");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Battery charger driver for TI's tps65217
+ *
+ * Copyright (c) 2015, Collabora Ltd.
+
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Battery charger driver for TI's tps65217
+ */
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/power_supply.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65217.h>
+
+#define POLL_INTERVAL (HZ * 2)
+
+struct tps65217_charger {
+ struct tps65217 *tps;
+ struct device *dev;
+ struct power_supply *ac;
+
+ int ac_online;
+ int prev_ac_online;
+
+ struct task_struct *poll_task;
+
+ int irq;
+};
+
+static enum power_supply_property tps65217_ac_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static int tps65217_config_charger(struct tps65217_charger *charger)
+{
+ int ret;
+
+ dev_dbg(charger->dev, "%s\n", __func__);
+
+ /*
+ * tps65217 rev. G, p. 31 (see p. 32 for NTC schematic)
+ *
+ * The device can be configured to support a 100k NTC (B = 3960) by
+ * setting the the NTC_TYPE bit in register CHGCONFIG1 to 1. However it
+ * is not recommended to do so. In sleep mode, the charger continues
+ * charging the battery, but all register values are reset to default
+ * values. Therefore, the charger would get the wrong temperature
+ * information. If 100k NTC setting is required, please contact the
+ * factory.
+ *
+ * ATTENTION, conflicting information, from p. 46
+ *
+ * NTC TYPE (for battery temperature measurement)
+ * 0 – 100k (curve 1, B = 3960)
+ * 1 – 10k (curve 2, B = 3480) (default on reset)
+ *
+ */
+ ret = tps65217_clear_bits(charger->tps, TPS65217_REG_CHGCONFIG1,
+ TPS65217_CHGCONFIG1_NTC_TYPE,
+ TPS65217_PROTECT_NONE);
+ if (ret) {
+ dev_err(charger->dev,
+ "failed to set 100k NTC setting: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tps65217_enable_charging(struct tps65217_charger *charger)
+{
+ int ret;
+
+ /* charger already enabled */
+ if (charger->ac_online)
+ return 0;
+
+ dev_dbg(charger->dev, "%s: enable charging\n", __func__);
+ ret = tps65217_set_bits(charger->tps, TPS65217_REG_CHGCONFIG1,
+ TPS65217_CHGCONFIG1_CHG_EN,
+ TPS65217_CHGCONFIG1_CHG_EN,
+ TPS65217_PROTECT_NONE);
+ if (ret) {
+ dev_err(charger->dev,
+ "%s: Error in writing CHG_EN in reg 0x%x: %d\n",
+ __func__, TPS65217_REG_CHGCONFIG1, ret);
+ return ret;
+ }
+
+ charger->ac_online = 1;
+
+ return 0;
+}
+
+static int tps65217_ac_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct tps65217_charger *charger = power_supply_get_drvdata(psy);
+
+ if (psp == POWER_SUPPLY_PROP_ONLINE) {
+ val->intval = charger->ac_online;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static irqreturn_t tps65217_charger_irq(int irq, void *dev)
+{
+ int ret, val;
+ struct tps65217_charger *charger = dev;
+
+ charger->prev_ac_online = charger->ac_online;
+
+ ret = tps65217_reg_read(charger->tps, TPS65217_REG_STATUS, &val);
+ if (ret < 0) {
+ dev_err(charger->dev, "%s: Error in reading reg 0x%x\n",
+ __func__, TPS65217_REG_STATUS);
+ return IRQ_HANDLED;
+ }
+
+ dev_dbg(charger->dev, "%s: 0x%x\n", __func__, val);
+
+ /* check for AC status bit */
+ if (val & TPS65217_STATUS_ACPWR) {
+ ret = tps65217_enable_charging(charger);
+ if (ret) {
+ dev_err(charger->dev,
+ "failed to enable charger: %d\n", ret);
+ return IRQ_HANDLED;
+ }
+ } else {
+ charger->ac_online = 0;
+ }
+
+ if (charger->prev_ac_online != charger->ac_online)
+ power_supply_changed(charger->ac);
+
+ ret = tps65217_reg_read(charger->tps, TPS65217_REG_CHGCONFIG0, &val);
+ if (ret < 0) {
+ dev_err(charger->dev, "%s: Error in reading reg 0x%x\n",
+ __func__, TPS65217_REG_CHGCONFIG0);
+ return IRQ_HANDLED;
+ }
+
+ if (val & TPS65217_CHGCONFIG0_ACTIVE)
+ dev_dbg(charger->dev, "%s: charger is charging\n", __func__);
+ else
+ dev_dbg(charger->dev,
+ "%s: charger is NOT charging\n", __func__);
+
+ return IRQ_HANDLED;
+}
+
+static int tps65217_charger_poll_task(void *data)
+{
+ set_freezable();
+
+ while (!kthread_should_stop()) {
+ schedule_timeout_interruptible(POLL_INTERVAL);
+ try_to_freeze();
+ tps65217_charger_irq(-1, data);
+ }
+ return 0;
+}
+
+static const struct power_supply_desc tps65217_charger_desc = {
+ .name = "tps65217-ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .get_property = tps65217_ac_get_property,
+ .properties = tps65217_ac_props,
+ .num_properties = ARRAY_SIZE(tps65217_ac_props),
+};
+
+static int tps65217_charger_probe(struct platform_device *pdev)
+{
+ struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
+ struct tps65217_charger *charger;
+ struct power_supply_config cfg = {};
+ int irq;
+ int ret;
+
+ dev_dbg(&pdev->dev, "%s\n", __func__);
+
+ charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL);
+ if (!charger)
+ return -ENOMEM;
+
++ platform_set_drvdata(pdev, charger);
+ charger->tps = tps;
+ charger->dev = &pdev->dev;
+
+ cfg.of_node = pdev->dev.of_node;
+ cfg.drv_data = charger;
+
+ charger->ac = devm_power_supply_register(&pdev->dev,
+ &tps65217_charger_desc,
+ &cfg);
+ if (IS_ERR(charger->ac)) {
+ dev_err(&pdev->dev, "failed: power supply register\n");
+ return PTR_ERR(charger->ac);
+ }
+
+ irq = platform_get_irq_byname(pdev, "AC");
+ if (irq < 0)
+ irq = -ENXIO;
+ charger->irq = irq;
+
+ ret = tps65217_config_charger(charger);
+ if (ret < 0) {
+ dev_err(charger->dev, "charger config failed, err %d\n", ret);
+ return ret;
+ }
+
+ if (irq != -ENXIO) {
+ ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+ tps65217_charger_irq,
+ 0, "tps65217-charger",
+ charger);
+ if (ret) {
+ dev_err(charger->dev,
+ "Unable to register irq %d err %d\n", irq,
+ ret);
+ return ret;
+ }
+
+ /* Check current state */
+ tps65217_charger_irq(irq, charger);
+ } else {
+ charger->poll_task = kthread_run(tps65217_charger_poll_task,
+ charger, "ktps65217charger");
+ if (IS_ERR(charger->poll_task)) {
+ ret = PTR_ERR(charger->poll_task);
+ dev_err(charger->dev,
+ "Unable to run kthread err %d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int tps65217_charger_remove(struct platform_device *pdev)
+{
+ struct tps65217_charger *charger = platform_get_drvdata(pdev);
+
+ if (charger->irq == -ENXIO)
+ kthread_stop(charger->poll_task);
+
+ return 0;
+}
+
+static const struct of_device_id tps65217_charger_match_table[] = {
+ { .compatible = "ti,tps65217-charger", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, tps65217_charger_match_table);
+
+static struct platform_driver tps65217_charger_driver = {
+ .probe = tps65217_charger_probe,
+ .remove = tps65217_charger_remove,
+ .driver = {
+ .name = "tps65217-charger",
+ .of_match_table = of_match_ptr(tps65217_charger_match_table),
+ },
+
+};
+module_platform_driver(tps65217_charger_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Enric Balletbo Serra <enric.balletbo@collabora.com>");
+MODULE_DESCRIPTION("TPS65217 battery charger driver");
projects / cascardo / linux.git / commitdiff