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Diffstat (limited to 'drivers/power/max17042_battery.c')
-rw-r--r--drivers/power/max17042_battery.c862
1 files changed, 0 insertions, 862 deletions
diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
deleted file mode 100644
index d664ef58afa7..000000000000
--- a/drivers/power/max17042_battery.c
+++ /dev/null
@@ -1,862 +0,0 @@
-/*
- * 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>
-
-/* 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_IC_VERSION 0x0092
-#define MAX17047_IC_VERSION 0x00AC /* same for max17050 */
-
-struct max17042_chip {
- struct i2c_client *client;
- struct power_supply battery;
- enum max170xx_chip_type chip_type;
- struct max17042_platform_data *pdata;
- struct work_struct work;
- int init_complete;
-};
-
-static int max17042_write_reg(struct i2c_client *client, u8 reg, u16 value)
-{
- int ret = i2c_smbus_write_word_data(client, reg, value);
-
- if (ret < 0)
- dev_err(&client->dev, "%s: err %d\n", __func__, ret);
-
- return ret;
-}
-
-static int max17042_read_reg(struct i2c_client *client, u8 reg)
-{
- int ret = i2c_smbus_read_word_data(client, reg);
-
- if (ret < 0)
- dev_err(&client->dev, "%s: err %d\n", __func__, ret);
-
- return ret;
-}
-
-static void max17042_set_reg(struct i2c_client *client,
- struct max17042_reg_data *data, int size)
-{
- int i;
-
- for (i = 0; i < size; i++)
- max17042_write_reg(client, data[i].addr, data[i].data);
-}
-
-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_CURRENT_NOW,
- POWER_SUPPLY_PROP_CURRENT_AVG,
-};
-
-static int max17042_get_property(struct power_supply *psy,
- enum power_supply_property psp,
- union power_supply_propval *val)
-{
- struct max17042_chip *chip = container_of(psy,
- struct max17042_chip, battery);
- int ret;
-
- if (!chip->init_complete)
- return -EAGAIN;
-
- switch (psp) {
- case POWER_SUPPLY_PROP_PRESENT:
- ret = max17042_read_reg(chip->client, MAX17042_STATUS);
- if (ret < 0)
- return ret;
-
- if (ret & MAX17042_STATUS_BattAbsent)
- val->intval = 0;
- else
- val->intval = 1;
- break;
- case POWER_SUPPLY_PROP_CYCLE_COUNT:
- ret = max17042_read_reg(chip->client, MAX17042_Cycles);
- if (ret < 0)
- return ret;
-
- val->intval = ret;
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_MAX:
- ret = max17042_read_reg(chip->client, MAX17042_MinMaxVolt);
- if (ret < 0)
- return ret;
-
- val->intval = ret >> 8;
- val->intval *= 20000; /* Units of LSB = 20mV */
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
- if (chip->chip_type == MAX17042)
- ret = max17042_read_reg(chip->client, MAX17042_V_empty);
- else
- ret = max17042_read_reg(chip->client, MAX17047_V_empty);
- if (ret < 0)
- return ret;
-
- val->intval = ret >> 7;
- val->intval *= 10000; /* Units of LSB = 10mV */
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_NOW:
- ret = max17042_read_reg(chip->client, MAX17042_VCELL);
- if (ret < 0)
- return ret;
-
- val->intval = ret * 625 / 8;
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_AVG:
- ret = max17042_read_reg(chip->client, MAX17042_AvgVCELL);
- if (ret < 0)
- return ret;
-
- val->intval = ret * 625 / 8;
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_OCV:
- ret = max17042_read_reg(chip->client, MAX17042_OCVInternal);
- if (ret < 0)
- return ret;
-
- val->intval = ret * 625 / 8;
- break;
- case POWER_SUPPLY_PROP_CAPACITY:
- ret = max17042_read_reg(chip->client, MAX17042_RepSOC);
- if (ret < 0)
- return ret;
-
- val->intval = ret >> 8;
- break;
- case POWER_SUPPLY_PROP_CHARGE_FULL:
- ret = max17042_read_reg(chip->client, MAX17042_FullCAP);
- if (ret < 0)
- return ret;
-
- val->intval = ret * 1000 / 2;
- break;
- case POWER_SUPPLY_PROP_CHARGE_COUNTER:
- ret = max17042_read_reg(chip->client, MAX17042_QH);
- if (ret < 0)
- return ret;
-
- val->intval = ret * 1000 / 2;
- break;
- case POWER_SUPPLY_PROP_TEMP:
- ret = max17042_read_reg(chip->client, MAX17042_TEMP);
- if (ret < 0)
- return ret;
-
- val->intval = ret;
- /* The value is signed. */
- if (val->intval & 0x8000) {
- val->intval = (0x7fff & ~val->intval) + 1;
- val->intval *= -1;
- }
- /* The value is converted into deci-centigrade scale */
- /* Units of LSB = 1 / 256 degree Celsius */
- val->intval = val->intval * 10 / 256;
- break;
- case POWER_SUPPLY_PROP_CURRENT_NOW:
- if (chip->pdata->enable_current_sense) {
- ret = max17042_read_reg(chip->client, MAX17042_Current);
- if (ret < 0)
- return ret;
-
- val->intval = ret;
- 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 = max17042_read_reg(chip->client,
- MAX17042_AvgCurrent);
- if (ret < 0)
- return ret;
-
- val->intval = ret;
- 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_write_verify_reg(struct i2c_client *client,
- u8 reg, u16 value)
-{
- int retries = 8;
- int ret;
- u16 read_value;
-
- do {
- ret = i2c_smbus_write_word_data(client, reg, value);
- read_value = max17042_read_reg(client, reg);
- if (read_value != value) {
- ret = -EIO;
- retries--;
- }
- } while (retries && read_value != value);
-
- if (ret < 0)
- dev_err(&client->dev, "%s: err %d\n", __func__, ret);
-
- return ret;
-}
-
-static inline void max17042_override_por(
- struct i2c_client *client, u8 reg, u16 value)
-{
- if (value)
- max17042_write_reg(client, reg, value);
-}
-
-static inline void max10742_unlock_model(struct max17042_chip *chip)
-{
- struct i2c_client *client = chip->client;
- max17042_write_reg(client, MAX17042_MLOCKReg1, MODEL_UNLOCK1);
- max17042_write_reg(client, MAX17042_MLOCKReg2, MODEL_UNLOCK2);
-}
-
-static inline void max10742_lock_model(struct max17042_chip *chip)
-{
- struct i2c_client *client = chip->client;
- max17042_write_reg(client, MAX17042_MLOCKReg1, MODEL_LOCK1);
- max17042_write_reg(client, MAX17042_MLOCKReg2, MODEL_LOCK2);
-}
-
-static inline void max17042_write_model_data(struct max17042_chip *chip,
- u8 addr, int size)
-{
- struct i2c_client *client = chip->client;
- int i;
- for (i = 0; i < size; i++)
- max17042_write_reg(client, addr + i,
- chip->pdata->config_data->cell_char_tbl[i]);
-}
-
-static inline void max17042_read_model_data(struct max17042_chip *chip,
- u8 addr, u16 *data, int size)
-{
- struct i2c_client *client = chip->client;
- int i;
-
- for (i = 0; i < size; i++)
- data[i] = max17042_read_reg(client, addr + i);
-}
-
-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;
-
- 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,
- 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;
-
- max17042_write_reg(chip->client, MAX17042_CONFIG, config->config);
- max17042_write_reg(chip->client, MAX17042_LearnCFG, config->learn_cfg);
- max17042_write_reg(chip->client, MAX17042_FilterCFG,
- config->filter_cfg);
- max17042_write_reg(chip->client, MAX17042_RelaxCFG, config->relax_cfg);
- if (chip->chip_type == MAX17047)
- max17042_write_reg(chip->client, 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;
-
- max17042_write_verify_reg(chip->client, MAX17042_RCOMP0,
- config->rcomp0);
- max17042_write_verify_reg(chip->client, MAX17042_TempCo,
- config->tcompc0);
- max17042_write_verify_reg(chip->client, MAX17042_ICHGTerm,
- config->ichgt_term);
- if (chip->chip_type == MAX17042) {
- max17042_write_reg(chip->client, MAX17042_EmptyTempCo,
- config->empty_tempco);
- max17042_write_verify_reg(chip->client, MAX17042_K_empty0,
- config->kempty0);
- } else {
- max17042_write_verify_reg(chip->client, MAX17047_QRTbl00,
- config->qrtbl00);
- max17042_write_verify_reg(chip->client, MAX17047_QRTbl10,
- config->qrtbl10);
- max17042_write_verify_reg(chip->client, MAX17047_QRTbl20,
- config->qrtbl20);
- max17042_write_verify_reg(chip->client, MAX17047_QRTbl30,
- config->qrtbl30);
- }
-}
-
-static void max17042_update_capacity_regs(struct max17042_chip *chip)
-{
- struct max17042_config_data *config = chip->pdata->config_data;
-
- max17042_write_verify_reg(chip->client, MAX17042_FullCAP,
- config->fullcap);
- max17042_write_reg(chip->client, MAX17042_DesignCap,
- config->design_cap);
- max17042_write_verify_reg(chip->client, MAX17042_FullCAPNom,
- config->fullcapnom);
-}
-
-static void max17042_reset_vfsoc0_reg(struct max17042_chip *chip)
-{
- u16 vfSoc;
-
- vfSoc = max17042_read_reg(chip->client, MAX17042_VFSOC);
- max17042_write_reg(chip->client, MAX17042_VFSOC0Enable, VFSOC0_UNLOCK);
- max17042_write_verify_reg(chip->client, MAX17042_VFSOC0, vfSoc);
- max17042_write_reg(chip->client, MAX17042_VFSOC0Enable, VFSOC0_LOCK);
-}
-
-static void max17042_load_new_capacity_params(struct max17042_chip *chip)
-{
- u16 full_cap0, rep_cap, dq_acc, vfSoc;
- u32 rem_cap;
-
- struct max17042_config_data *config = chip->pdata->config_data;
-
- full_cap0 = max17042_read_reg(chip->client, MAX17042_FullCAP0);
- vfSoc = max17042_read_reg(chip->client, MAX17042_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(chip->client, MAX17042_RemCap, (u16)rem_cap);
-
- rep_cap = (u16)rem_cap;
- max17042_write_verify_reg(chip->client, 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(chip->client, MAX17042_dQacc, dq_acc);
- max17042_write_verify_reg(chip->client, MAX17042_dPacc, dP_ACC_200);
-
- max17042_write_verify_reg(chip->client, MAX17042_FullCAP,
- config->fullcap);
- max17042_write_reg(chip->client, MAX17042_DesignCap,
- config->design_cap);
- max17042_write_verify_reg(chip->client, MAX17042_FullCAPNom,
- config->fullcapnom);
- /* Update SOC register with new SOC */
- max17042_write_reg(chip->client, 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 i2c_client *client = chip->client;
- struct max17042_config_data *config = chip->pdata->config_data;
-
- max17042_override_por(client, MAX17042_TGAIN, config->tgain);
- max17042_override_por(client, MAx17042_TOFF, config->toff);
- max17042_override_por(client, MAX17042_CGAIN, config->cgain);
- max17042_override_por(client, MAX17042_COFF, config->coff);
-
- max17042_override_por(client, MAX17042_VALRT_Th, config->valrt_thresh);
- max17042_override_por(client, MAX17042_TALRT_Th, config->talrt_thresh);
- max17042_override_por(client, MAX17042_SALRT_Th,
- config->soc_alrt_thresh);
- max17042_override_por(client, MAX17042_CONFIG, config->config);
- max17042_override_por(client, MAX17042_SHDNTIMER, config->shdntimer);
-
- max17042_override_por(client, MAX17042_DesignCap, config->design_cap);
- max17042_override_por(client, MAX17042_ICHGTerm, config->ichgt_term);
-
- max17042_override_por(client, MAX17042_AtRate, config->at_rate);
- max17042_override_por(client, MAX17042_LearnCFG, config->learn_cfg);
- max17042_override_por(client, MAX17042_FilterCFG, config->filter_cfg);
- max17042_override_por(client, MAX17042_RelaxCFG, config->relax_cfg);
- max17042_override_por(client, MAX17042_MiscCFG, config->misc_cfg);
- max17042_override_por(client, MAX17042_MaskSOC, config->masksoc);
-
- max17042_override_por(client, MAX17042_FullCAP, config->fullcap);
- max17042_override_por(client, MAX17042_FullCAPNom, config->fullcapnom);
- if (chip->chip_type == MAX17042)
- max17042_override_por(client, MAX17042_SOC_empty,
- config->socempty);
- max17042_override_por(client, MAX17042_LAvg_empty, config->lavg_empty);
- max17042_override_por(client, MAX17042_dQacc, config->dqacc);
- max17042_override_por(client, MAX17042_dPacc, config->dpacc);
-
- if (chip->chip_type == MAX17042)
- max17042_override_por(client, MAX17042_V_empty, config->vempty);
- else
- max17042_override_por(client, MAX17047_V_empty, config->vempty);
- max17042_override_por(client, MAX17042_TempNom, config->temp_nom);
- max17042_override_por(client, MAX17042_TempLim, config->temp_lim);
- max17042_override_por(client, MAX17042_FCTC, config->fctc);
- max17042_override_por(client, MAX17042_RCOMP0, config->rcomp0);
- max17042_override_por(client, MAX17042_TempCo, config->tcompc0);
- if (chip->chip_type) {
- max17042_override_por(client, MAX17042_EmptyTempCo,
- config->empty_tempco);
- max17042_override_por(client, MAX17042_K_empty0,
- config->kempty0);
- }
-}
-
-static int max17042_init_chip(struct max17042_chip *chip)
-{
- int ret;
- int val;
-
- 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 */
- val = max17042_read_reg(chip->client, MAX17042_STATUS);
- max17042_write_reg(chip->client, MAX17042_STATUS,
- val & (~STATUS_POR_BIT));
- return 0;
-}
-
-static void max17042_set_soc_threshold(struct max17042_chip *chip, u16 off)
-{
- u16 soc, soc_tr;
-
- /* program interrupt thesholds such that we should
- * get interrupt for every 'off' perc change in the soc
- */
- soc = max17042_read_reg(chip->client, MAX17042_RepSOC) >> 8;
- soc_tr = (soc + off) << 8;
- soc_tr |= (soc - off);
- max17042_write_reg(chip->client, MAX17042_SALRT_Th, soc_tr);
-}
-
-static irqreturn_t max17042_thread_handler(int id, void *dev)
-{
- struct max17042_chip *chip = dev;
- u16 val;
-
- val = max17042_read_reg(chip->client, MAX17042_STATUS);
- 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;
- }
-
- return pdata;
-}
-#else
-static struct max17042_platform_data *
-max17042_get_pdata(struct device *dev)
-{
- return dev->platform_data;
-}
-#endif
-
-static int max17042_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
- struct max17042_chip *chip;
- int ret;
- int reg;
-
- 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->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);
-
- ret = max17042_read_reg(chip->client, MAX17042_DevName);
- if (ret == MAX17042_IC_VERSION) {
- dev_dbg(&client->dev, "chip type max17042 detected\n");
- chip->chip_type = MAX17042;
- } else if (ret == MAX17047_IC_VERSION) {
- dev_dbg(&client->dev, "chip type max17047/50 detected\n");
- chip->chip_type = MAX17047;
- } else {
- dev_err(&client->dev, "device version mismatch: %x\n", ret);
- return -EIO;
- }
-
- chip->battery.name = "max170xx_battery";
- chip->battery.type = POWER_SUPPLY_TYPE_BATTERY;
- chip->battery.get_property = max17042_get_property;
- chip->battery.properties = max17042_battery_props;
- chip->battery.num_properties = ARRAY_SIZE(max17042_battery_props);
-
- /* When current is not measured,
- * CURRENT_NOW and CURRENT_AVG properties should be invisible. */
- if (!chip->pdata->enable_current_sense)
- chip->battery.num_properties -= 2;
-
- if (chip->pdata->r_sns == 0)
- chip->pdata->r_sns = MAX17042_DEFAULT_SNS_RESISTOR;
-
- if (chip->pdata->init_data)
- max17042_set_reg(client, chip->pdata->init_data,
- chip->pdata->num_init_data);
-
- if (!chip->pdata->enable_current_sense) {
- max17042_write_reg(client, MAX17042_CGAIN, 0x0000);
- max17042_write_reg(client, MAX17042_MiscCFG, 0x0003);
- max17042_write_reg(client, MAX17042_LearnCFG, 0x0007);
- }
-
- ret = power_supply_register(&client->dev, &chip->battery);
- if (ret) {
- dev_err(&client->dev, "failed: power supply register\n");
- return ret;
- }
-
- if (client->irq) {
- ret = request_threaded_irq(client->irq, NULL,
- max17042_thread_handler,
- IRQF_TRIGGER_FALLING,
- chip->battery.name, chip);
- if (!ret) {
- reg = max17042_read_reg(client, MAX17042_CONFIG);
- reg |= CONFIG_ALRT_BIT_ENBL;
- max17042_write_reg(client, MAX17042_CONFIG, reg);
- max17042_set_soc_threshold(chip, 1);
- } else {
- client->irq = 0;
- dev_err(&client->dev, "%s(): cannot get IRQ\n",
- __func__);
- }
- }
-
- reg = max17042_read_reg(chip->client, MAX17042_STATUS);
- if (reg & STATUS_POR_BIT) {
- INIT_WORK(&chip->work, max17042_init_worker);
- schedule_work(&chip->work);
- } else {
- chip->init_complete = 1;
- }
-
- return 0;
-}
-
-static int max17042_remove(struct i2c_client *client)
-{
- struct max17042_chip *chip = i2c_get_clientdata(client);
-
- if (client->irq)
- free_irq(client->irq, chip);
- power_supply_unregister(&chip->battery);
- return 0;
-}
-
-#ifdef CONFIG_PM
-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;
-}
-
-static const struct dev_pm_ops max17042_pm_ops = {
- .suspend = max17042_suspend,
- .resume = max17042_resume,
-};
-
-#define MAX17042_PM_OPS (&max17042_pm_ops)
-#else
-#define MAX17042_PM_OPS NULL
-#endif
-
-#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", 0 },
- { "max17047", 1 },
- { "max17050", 2 },
- { }
-};
-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,
- .remove = max17042_remove,
- .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");
generated by cgit (git 2.34.1) at 2025-12-25 20:56:07 +0000