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Message-ID: <20230508131045.9399-6-Zeynep.Arslanbenzer@analog.com>
Date: Mon, 8 May 2023 16:10:43 +0300
From: Zeynep Arslanbenzer <Zeynep.Arslanbenzer@...log.com>
To: <lee@...nel.org>, <robh+dt@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <sre@...nel.org>,
<lgirdwood@...il.com>, <broonie@...nel.org>
CC: <Zeynep.Arslanbenzer@...log.com>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-pm@...r.kernel.org>,
Nurettin Bolucu <Nurettin.Bolucu@...log.com>
Subject: [PATCH v3 5/7] power: supply: max77658: Add ADI MAX77658 Battery Support
Battery driver for ADI MAX77658.
The MAX77658 is an ultra-low power fuel gauge which implements the Maxim ModelGauge m5 EZ algorithm.
Signed-off-by: Nurettin Bolucu <Nurettin.Bolucu@...log.com>
Signed-off-by: Zeynep Arslanbenzer <Zeynep.Arslanbenzer@...log.com>
---
drivers/power/supply/Kconfig | 7 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/max77658-battery.c | 633 ++++++++++++++++++++++++
3 files changed, 641 insertions(+)
create mode 100644 drivers/power/supply/max77658-battery.c
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 4b68bbb1e2a8..f9556f4b9e35 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -572,6 +572,13 @@ config CHARGER_MAX77658
Say Y to enable support for the battery charger control of
MAX77654/58/59 PMIC.
+config BATTERY_MAX77658
+ tristate "Analog Devices MAX77658 battery driver"
+ depends on MFD_MAX77658
+ help
+ Say Y to enable support for the battery control of
+ MAX77658 PMIC.
+
config CHARGER_MAX77693
tristate "Maxim MAX77693 battery charger driver"
depends on MFD_MAX77693
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index af4bd6e5969f..e5a425d333a7 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -77,6 +77,7 @@ obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o
obj-$(CONFIG_CHARGER_DETECTOR_MAX14656) += max14656_charger_detector.o
obj-$(CONFIG_CHARGER_MAX77650) += max77650-charger.o
obj-$(CONFIG_CHARGER_MAX77658) += max77658-charger.o
+obj-$(CONFIG_BATTERY_MAX77658) += max77658-battery.o
obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
obj-$(CONFIG_CHARGER_MAX77976) += max77976_charger.o
obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
diff --git a/drivers/power/supply/max77658-battery.c b/drivers/power/supply/max77658-battery.c
new file mode 100644
index 000000000000..4948ef227db1
--- /dev/null
+++ b/drivers/power/supply/max77658-battery.c
@@ -0,0 +1,633 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2023 Analog Devices, Inc.
+ * ADI battery driver for the MAX77658
+ */
+
+#include <linux/bitfield.h>
+#include <linux/delay.h>
+#include <linux/mfd/max77658.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+
+/* Default value for SALRT min threshold, in percent */
+#define MAX77658_SALRT_MIN_DEFAULT 1
+/* Default value for SALRT max threshold, in percent */
+#define MAX77658_SALRT_MAX_DEFAULT 99
+
+#define MAX77658_IALRTTH_RESOLUTION 8567
+#define MAX77658_CURRENT_RESOLUTION 33487
+#define MAX77658_VOLTAGE_RESOLUTION 78125
+#define MAX77658_FG_DELAY 1000
+#define MAX77658_BATTERY_FULL 100
+#define MAX77658_BATTERY_LOW 40
+#define MAX77658_BATTERY_CRITICAL 10
+#define MAX77658_MAXMINVOLT_STEP 20000
+#define MAX77658_VALRTTH_STEP 20000
+#define MAX77658_VEMPTY_VE_STEP 10000
+#define MAX77658_POWER_STEP 17100
+
+#define MAX77658_REG_STATUS 0x00
+#define MAX77658_REG_VALRTTH 0x01
+#define MAX77658_REG_TALRTTH 0x02
+#define MAX77658_REG_SALRTTH 0x03
+#define MAX77658_REG_CONFIG 0x1D
+#define MAX77658_REG_DEVNAME 0x21
+#define MAX77658_REG_VEMPTY 0x3A
+#define MAX77658_REG_AVGPOWER 0xB3
+#define MAX77658_REG_IALRTTH 0xB4
+#define MAX77658_REG_CONFIG2 0xBB
+#define MAX77658_REG_TEMP 0x08
+#define MAX77658_REG_VCELL 0x09
+#define MAX77658_REG_CURRENT 0x0A
+#define MAX77658_REG_AVGCURRENT 0x0B
+#define MAX77658_REG_AVGVCELL 0x19
+#define MAX77658_REG_MAXMINTEMP 0x1A
+#define MAX77658_REG_MAXMINVOLT 0x1B
+#define MAX77658_REG_MAXMINCURR 0x1C
+#define MAX77658_REG_REPSOC 0x06
+#define MAX77658_REG_TTE 0x11
+#define MAX77658_REG_TTF 0x20
+
+#define MAX77658_BIT_STATUS_BR BIT(15)
+#define MAX77658_BIT_STATUS_SMX BIT(14)
+#define MAX77658_BIT_STATUS_TMX BIT(13)
+#define MAX77658_BIT_STATUS_VMX BIT(12)
+#define MAX77658_BIT_STATUS_BI BIT(11)
+#define MAX77658_BIT_STATUS_SMN BIT(10)
+#define MAX77658_BIT_STATUS_TMN BIT(9)
+#define MAX77658_BIT_STATUS_VMN BIT(8)
+#define MAX77658_BIT_STATUS_POR BIT(2)
+#define MAX77658_BIT_CONFIG_AEN BIT(2)
+#define MAX77658_BIT_SALRTTH_SMIN GENMASK(7, 0)
+#define MAX77658_BIT_SALRTTH_SMAX GENMASK(15, 8)
+#define MAX77658_BIT_TALRTTH_TMIN GENMASK(7, 0)
+#define MAX77658_BIT_TALRTTH_TMAX GENMASK(15, 8)
+#define MAX77658_BIT_IALRTTH_IMIN GENMASK(7, 0)
+#define MAX77658_BIT_IALRTTH_IMAX GENMASK(15, 8)
+#define MAX77658_BIT_MAXMINTEMP_MIN GENMASK(7, 0)
+#define MAX77658_BIT_MAXMINTEMP_MAX GENMASK(15, 8)
+#define MAX77658_BIT_MAXMINVOLT_MIN GENMASK(7, 0)
+#define MAX77658_BIT_MAXMINVOLT_MAX GENMASK(15, 8)
+#define MAX77658_BIT_VEMPTY_VE GENMASK(15, 7)
+
+struct max77658_fg {
+ struct device *dev;
+ struct max77658_dev *max77658;
+ struct regmap *regmap;
+
+ struct delayed_work work;
+ struct power_supply *battery;
+ struct power_supply_desc psy_batt_d;
+
+ int vcell;
+ int soc;
+ int health;
+ int capacity_level;
+
+ int lasttime_vcell;
+ int lasttime_soc;
+
+ int volt_min_uv;
+ int volt_max_uv;
+ int temp_alert_min;
+ int temp_alert_max;
+ int curr_max_ma;
+ int curr_min_ma;
+};
+
+static int max77658_fg_get_soc(struct max77658_fg *max77658_fg)
+{
+ unsigned int soc;
+ int ret;
+
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_REPSOC, &soc);
+ if (ret < 0) {
+ dev_dbg(max77658_fg->dev, "Error in reading register REPSOC\n");
+ return ret;
+ }
+
+ max77658_fg->soc = (u16)(soc >> 8);
+
+ if (max77658_fg->soc > MAX77658_BATTERY_FULL) {
+ max77658_fg->soc = MAX77658_BATTERY_FULL;
+ max77658_fg->capacity_level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ max77658_fg->health = POWER_SUPPLY_HEALTH_GOOD;
+ } else if (max77658_fg->soc < MAX77658_BATTERY_CRITICAL) {
+ max77658_fg->health = POWER_SUPPLY_HEALTH_DEAD;
+ max77658_fg->capacity_level =
+ POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+ } else if (max77658_fg->soc < MAX77658_BATTERY_LOW) {
+ max77658_fg->health = POWER_SUPPLY_HEALTH_DEAD;
+ max77658_fg->capacity_level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ } else {
+ max77658_fg->health = POWER_SUPPLY_HEALTH_GOOD;
+ max77658_fg->capacity_level =
+ POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ }
+
+ return 0;
+}
+
+static void max77658_stop_work(void *data)
+{
+ struct max77658_fg *max77658_fg = data;
+
+ cancel_delayed_work_sync(&max77658_fg->work);
+}
+
+static u16 max77658_raw_voltage_to_uv(unsigned int val)
+{
+ return (u16)val * MAX77658_VOLTAGE_RESOLUTION;
+}
+
+static void max77658_fg_work(struct work_struct *work)
+{
+ struct max77658_fg *max77658_fg;
+ unsigned int val;
+ int ret;
+
+ max77658_fg = container_of(work, struct max77658_fg, work.work);
+
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_VCELL, &val);
+ if (ret < 0)
+ dev_err(max77658_fg->dev, "Error in reading register\n");
+ else
+ max77658_fg->vcell = max77658_raw_voltage_to_uv(val);
+
+ ret = max77658_fg_get_soc(max77658_fg);
+ if (ret < 0)
+ goto out;
+
+ if (max77658_fg->vcell != max77658_fg->lasttime_vcell ||
+ max77658_fg->soc != max77658_fg->lasttime_soc) {
+ max77658_fg->lasttime_vcell = max77658_fg->vcell;
+ max77658_fg->lasttime_soc = max77658_fg->soc;
+
+ power_supply_changed(max77658_fg->battery);
+ }
+
+out:
+ schedule_delayed_work(&max77658_fg->work, MAX77658_FG_DELAY);
+}
+
+static enum power_supply_property max77658_fg_battery_props[] = {
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
+ POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TEMP_ALERT_MIN,
+ POWER_SUPPLY_PROP_TEMP_ALERT_MAX,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
+ POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
+ POWER_SUPPLY_PROP_TEMP_MAX,
+ POWER_SUPPLY_PROP_TEMP_MIN,
+ POWER_SUPPLY_PROP_POWER_AVG
+};
+
+static int max77658_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
+ case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
+ case POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX:
+ case POWER_SUPPLY_PROP_TEMP_MAX:
+ case POWER_SUPPLY_PROP_TEMP_MIN:
+ return 1;
+ default:
+ return 0;
+ }
+
+ return 0;
+}
+
+static u16 max77658_raw_current_to_ua(unsigned int val)
+{
+ return sign_extend32(val, 15) * MAX77658_CURRENT_RESOLUTION / 1000000;
+}
+
+static int max77658_fg_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct max77658_fg *max77658_fg = power_supply_get_drvdata(psy);
+ unsigned int reg_val;
+ u8 field_val;
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = max77658_fg->soc;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = max77658_fg->health;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ val->intval = max77658_fg->capacity_level;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = max77658_fg->vcell;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_AVGVCELL,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = max77658_raw_voltage_to_uv(reg_val);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_MAXMINVOLT,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = FIELD_GET(MAX77658_BIT_MAXMINVOLT_MAX, reg_val)
+ * MAX77658_MAXMINVOLT_STEP;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_MAXMINVOLT,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = FIELD_GET(MAX77658_BIT_MAXMINVOLT_MIN, reg_val)
+ * MAX77658_MAXMINVOLT_STEP;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_VEMPTY,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = FIELD_GET(MAX77658_BIT_VEMPTY_VE, reg_val)
+ * MAX77658_VEMPTY_VE_STEP;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_SALRTTH,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = FIELD_GET(MAX77658_BIT_SALRTTH_SMIN, reg_val);
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_SALRTTH,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = FIELD_GET(MAX77658_BIT_SALRTTH_SMAX, reg_val);
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_TEMP,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = sign_extend32(reg_val, 15);
+ val->intval = val->intval >> 8;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_TALRTTH,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = sign_extend32(reg_val & 0xff, 7);
+ break;
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_TALRTTH,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = sign_extend32(reg_val >> 8, 7);
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_CURRENT,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = max77658_raw_current_to_ua(reg_val);
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_AVGCURRENT,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = max77658_raw_current_to_ua(reg_val);
+ break;
+ case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_TTE,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = (reg_val * 45) >> 3;
+ break;
+ case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_TTF,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = (reg_val * 45) >> 3;
+ break;
+ case POWER_SUPPLY_PROP_TEMP_MIN:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_MAXMINTEMP,
+ ®_val);
+ if (ret)
+ return ret;
+
+ field_val = FIELD_GET(MAX77658_BIT_MAXMINTEMP_MIN, reg_val);
+ val->intval = sign_extend32(field_val, 7);
+ break;
+ case POWER_SUPPLY_PROP_TEMP_MAX:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_MAXMINTEMP,
+ ®_val);
+ if (ret)
+ return ret;
+
+ field_val = FIELD_GET(MAX77658_BIT_MAXMINTEMP_MAX, reg_val);
+ val->intval = sign_extend32(field_val, 7);
+
+ break;
+ case POWER_SUPPLY_PROP_POWER_AVG:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_AVGPOWER,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = reg_val * MAX77658_POWER_STEP;
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_MAXMINCURR,
+ ®_val);
+ if (ret)
+ return ret;
+
+ val->intval = FIELD_GET(MAX77658_BIT_MAXMINTEMP_MAX, reg_val)
+ * MAX77658_IALRTTH_RESOLUTION;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int max77658_fg_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct max77658_fg *max77658_fg = power_supply_get_drvdata(psy);
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MIN:
+ ret = regmap_update_bits(max77658_fg->regmap,
+ MAX77658_REG_TALRTTH,
+ MAX77658_BIT_TALRTTH_TMIN,
+ val->intval);
+ break;
+ case POWER_SUPPLY_PROP_TEMP_ALERT_MAX:
+ ret = regmap_update_bits(max77658_fg->regmap,
+ MAX77658_REG_TALRTTH,
+ MAX77658_BIT_TALRTTH_TMAX,
+ val->intval);
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
+ ret = regmap_update_bits(max77658_fg->regmap,
+ MAX77658_REG_SALRTTH,
+ MAX77658_BIT_SALRTTH_SMIN,
+ val->intval);
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY_ALERT_MAX:
+ ret = regmap_update_bits(max77658_fg->regmap,
+ MAX77658_REG_SALRTTH,
+ MAX77658_BIT_SALRTTH_SMAX,
+ val->intval);
+ break;
+ case POWER_SUPPLY_PROP_TEMP_MIN:
+ ret = regmap_update_bits(max77658_fg->regmap,
+ MAX77658_REG_MAXMINTEMP,
+ MAX77658_BIT_MAXMINTEMP_MIN,
+ val->intval);
+ break;
+ case POWER_SUPPLY_PROP_TEMP_MAX:
+ ret = regmap_update_bits(max77658_fg->regmap,
+ MAX77658_REG_MAXMINTEMP,
+ MAX77658_BIT_MAXMINTEMP_MAX,
+ val->intval);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int max77658_set_alert_thresholds(struct max77658_fg *max77658_fg)
+{
+ unsigned int val;
+ int ret;
+
+ val = (max77658_fg->volt_min_uv / MAX77658_VALRTTH_STEP);
+ val |= ((max77658_fg->volt_max_uv / MAX77658_VALRTTH_STEP) << 8);
+ ret = regmap_write(max77658_fg->regmap, MAX77658_REG_VALRTTH, val);
+ if (ret)
+ return dev_err_probe(max77658_fg->dev, ret,
+ "Error in writing register VALRTTH\n");
+
+ val = FIELD_PREP(MAX77658_BIT_TALRTTH_TMAX, max77658_fg->temp_alert_max)
+ | FIELD_PREP(MAX77658_BIT_TALRTTH_TMIN, max77658_fg->temp_alert_min);
+ ret = regmap_write(max77658_fg->regmap, MAX77658_REG_TALRTTH, val);
+ if (ret)
+ return dev_err_probe(max77658_fg->dev, ret,
+ "Error in writing register TALRTTH\n");
+
+ val = FIELD_PREP(MAX77658_BIT_SALRTTH_SMAX, MAX77658_SALRT_MAX_DEFAULT)
+ | FIELD_PREP(MAX77658_BIT_SALRTTH_SMIN, MAX77658_SALRT_MIN_DEFAULT);
+ ret = regmap_write(max77658_fg->regmap, MAX77658_REG_SALRTTH, val);
+ if (ret)
+ return dev_err_probe(max77658_fg->dev, ret,
+ "Error in writing register SALRTTH\n");
+
+ val = FIELD_PREP(MAX77658_BIT_IALRTTH_IMAX,
+ max77658_fg->curr_max_ma / MAX77658_IALRTTH_RESOLUTION)
+ | FIELD_PREP(MAX77658_BIT_IALRTTH_IMIN,
+ (max77658_fg->curr_min_ma / MAX77658_IALRTTH_RESOLUTION));
+
+ return regmap_write(max77658_fg->regmap, MAX77658_REG_IALRTTH, val);
+}
+
+static int max77658_fg_initialize(struct max77658_fg *max77658_fg)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = max77658_set_alert_thresholds(max77658_fg);
+ if (ret)
+ return dev_err_probe(max77658_fg->dev, ret,
+ "Error in setting alert thresholds\n");
+
+ ret = regmap_read(max77658_fg->regmap, MAX77658_REG_STATUS, ®);
+ if (ret)
+ return dev_err_probe(max77658_fg->dev, ret,
+ "Error in reading register STATUS\n");
+
+ ret = regmap_write(max77658_fg->regmap, MAX77658_REG_STATUS,
+ reg & ~MAX77658_BIT_STATUS_POR);
+ if (ret)
+ return dev_err_probe(max77658_fg->dev, ret,
+ "Error in writing register STATUS\n");
+
+ schedule_delayed_work(&max77658_fg->work, MAX77658_FG_DELAY);
+ return 0;
+}
+
+static void max77658_fg_parse_dt(struct max77658_fg *max77658_fg)
+{
+ struct device *dev = max77658_fg->dev;
+ int ret;
+
+ ret = device_property_read_u32(dev, "adi,valrt-min-microvolt",
+ &max77658_fg->volt_min_uv);
+ if (ret) {
+ dev_dbg(dev,
+ "Could not read adi,valrt-min-microvolt DT property\n");
+ max77658_fg->volt_min_uv = 0;
+ }
+
+ ret = device_property_read_u32(dev, "adi,valrt-max-microvolt",
+ &max77658_fg->volt_max_uv);
+ if (ret) {
+ dev_dbg(dev,
+ "Could not read adi,valrt-max-microvolt DT property\n");
+ max77658_fg->volt_max_uv = 5100000;
+ }
+
+ ret = device_property_read_u32(dev, "adi,ialrt-min-microamp",
+ &max77658_fg->curr_min_ma);
+ if (ret) {
+ dev_dbg(dev,
+ "Could not read adi,ialrt-min-microamp DT property\n");
+ max77658_fg->curr_min_ma = MAX77658_IALRTTH_RESOLUTION * (-128);
+ }
+
+ ret = device_property_read_u32(dev, "adi,ialrt-max-microamp",
+ &max77658_fg->curr_max_ma);
+ if (ret) {
+ dev_dbg(dev,
+ "Could not read adi,ialrt-max-microamp DT property\n");
+ max77658_fg->curr_max_ma = MAX77658_IALRTTH_RESOLUTION * 127;
+ }
+}
+
+static int max77658_fg_probe(struct platform_device *pdev)
+{
+ struct max77658_dev *max77658 = dev_get_drvdata(pdev->dev.parent);
+ struct power_supply_battery_info *info;
+ struct power_supply_config fg_cfg = {};
+ struct device *dev = &pdev->dev;
+ struct max77658_fg *fg;
+ int ret = 0;
+
+ fg = devm_kzalloc(&pdev->dev, sizeof(*fg), GFP_KERNEL);
+ if (!fg)
+ return -ENOMEM;
+
+ fg->dev = &pdev->dev;
+ fg->regmap = max77658->regmap_fg;
+
+ fg->psy_batt_d.name = "max77658-battery";
+ fg->psy_batt_d.type = POWER_SUPPLY_TYPE_BATTERY;
+ fg->psy_batt_d.get_property = max77658_fg_get_property;
+ fg->psy_batt_d.set_property = max77658_fg_set_property;
+ fg->psy_batt_d.properties = max77658_fg_battery_props;
+ fg->psy_batt_d.property_is_writeable = max77658_property_is_writeable;
+ fg->psy_batt_d.num_properties = ARRAY_SIZE(max77658_fg_battery_props);
+ fg_cfg.drv_data = fg;
+
+ INIT_DELAYED_WORK(&fg->work, max77658_fg_work);
+ ret = devm_add_action(&pdev->dev, max77658_stop_work, fg);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Error in setting delayed work\n");
+
+ fg->battery = devm_power_supply_register(dev, &fg->psy_batt_d,
+ &fg_cfg);
+ if (IS_ERR(fg->battery))
+ return dev_err_probe(&pdev->dev, PTR_ERR(fg->battery),
+ "Failed to register battery\n");
+
+ fg->battery->of_node = of_get_child_by_name(dev->parent->of_node,
+ "fuel-gauge");
+
+ if (!fg->battery->of_node)
+ dev_err(dev,
+ "of_get_child_by_name\n");
+
+ ret = power_supply_get_battery_info(fg->battery, &info);
+ if (ret) {
+ dev_err(fg->dev, "Unable to get battery info\n");
+ fg->temp_alert_min = info->temp_alert_min;
+ fg->temp_alert_max = info->temp_alert_max;
+ } else {
+ fg->temp_alert_min = -128;
+ fg->temp_alert_max = 127;
+ }
+
+ max77658_fg_parse_dt(fg);
+
+ ret = max77658_fg_initialize(fg);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Error in initializing fuel gauge\n");
+ return 0;
+}
+
+static const struct of_device_id max77658_battery_of_id[] = {
+ { .compatible = "adi,max77658-battery" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, max77658_battery_of_id);
+
+static const struct platform_device_id max77658_fg_id[] = {
+ { "max77658-battery", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(platform, max77658_fg_id);
+
+static struct platform_driver max77658_fg_driver = {
+ .driver = {
+ .name = "max77658-battery",
+ .of_match_table = max77658_battery_of_id,
+ },
+ .probe = max77658_fg_probe,
+ .id_table = max77658_fg_id,
+};
+
+module_platform_driver(max77658_fg_driver);
+
+MODULE_DESCRIPTION("MAX77658 Fuel Gauge Driver");
+MODULE_AUTHOR("Nurettin.Bolucu@...log.com, Zeynep.Arslanbenzer@...log.com");
+MODULE_LICENSE("GPL");
--
2.25.1
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