Re: [PATCH v2 2/2] power: supply: max17040: Support compatible devices
From: Iskren Chernev
Date: Fri Jun 19 2020 - 16:15:01 EST
On 6/19/20 7:13 PM, Sebastian Reichel wrote:
> Hi,
>
> On Thu, Jun 18, 2020 at 01:13:40PM +0300, Iskren Chernev wrote:
>> The max17040 fuel gauge is part of a family of 8 chips that have very
>> similar mode of operations and registers.
>>
>> This change adds:
>> - compatible strings for all supported devices and handles the minor
>> differences between them;
>> - handling for devices reporting double capacity via maxim,double-soc;
>> - handling for setting rcomp, a compensation value for more accurate
>> reading, affected by battery chemistry and operating temps;
>> - suppot for SOC alerts (capacity changes by +/- 1%), to prevent polling
>> every second;
>> - redo i2c read/writes via regmap
>
> Please split this into multiple patches as described in
> Documentation/process/submitting-patches.rst:
>
> 3) Separate your changes
> ------------------------
>
> Separate each **logical change** into a separate patch.
So I did some cleanup on the existing code (unified function interfaces,
introduced regmap, and other small things). Can this be one commit?
> Thanks,
>
> -- Sebastian
>
>> The datasheets of the supported devices are linked [0] [1] [2] [3].
>>
>> [0] https://datasheets.maximintegrated.com/en/ds/MAX17040-MAX17041.pdf
>> [1] https://datasheets.maximintegrated.com/en/ds/MAX17043-MAX17044.pdf
>> [2] https://datasheets.maximintegrated.com/en/ds/MAX17048-MAX17049.pdf
>> [3] https://datasheets.maximintegrated.com/en/ds/MAX17058-MAX17059.pdf
>>
>> Signed-off-by: Iskren Chernev <iskren.chernev@xxxxxxxxx>
>> ---
>> v1: https://lkml.org/lkml/2020/6/8/683
>>
>> changes in v2:
>> - make max17040_family static
>> - fix rcomp len check
>> - implement maxim,skip-reset
>> - reword Kconfig text
>>
>> drivers/power/supply/Kconfig | 11 +-
>> drivers/power/supply/max17040_battery.c | 466 +++++++++++++++++-------
>> 2 files changed, 338 insertions(+), 139 deletions(-)
>>
>> diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
>> index 44d3c8512fb8d..69e9eaa100d9f 100644
>> --- a/drivers/power/supply/Kconfig
>> +++ b/drivers/power/supply/Kconfig
>> @@ -368,9 +368,14 @@ config BATTERY_MAX17040
>> tristate "Maxim MAX17040 Fuel Gauge"
>> depends on I2C
>> help
>> - MAX17040 is fuel-gauge systems for lithium-ion (Li+) batteries
>> - in handheld and portable equipment. The MAX17040 is configured
>> - to operate with a single lithium cell
>> + Maxim models with ModelGauge are fuel-gauge systems for lithium-ion
>> + (Li+) batteries in handheld and portable equipment, including
>> + max17040, max17041, max17043, max17044, max17048, max17049, max17058,
>> + max17059. It is also included in some batteries like max77836.
>> +
>> + Driver supports reporting SOC (State of Charge, i.e capacity),
>> + voltage and configurable low-SOC wakeup interrupt. For certain models
>> + a SOC change interrupt is also supported.
>>
>> config BATTERY_MAX17042
>> tristate "Maxim MAX17042/17047/17050/8997/8966 Fuel Gauge"
>> diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c
>> index 48aa44665e2f1..1244982cacacb 100644
>> --- a/drivers/power/supply/max17040_battery.c
>> +++ b/drivers/power/supply/max17040_battery.c
>> @@ -15,193 +15,342 @@
>> #include <linux/delay.h>
>> #include <linux/interrupt.h>
>> #include <linux/power_supply.h>
>> +#include <linux/of_device.h>
>> #include <linux/max17040_battery.h>
>> +#include <linux/regmap.h>
>> #include <linux/slab.h>
>>
>> #define MAX17040_VCELL 0x02
>> #define MAX17040_SOC 0x04
>> #define MAX17040_MODE 0x06
>> #define MAX17040_VER 0x08
>> -#define MAX17040_RCOMP 0x0C
>> +#define MAX17040_CONFIG 0x0C
>> +#define MAX17040_STATUS 0x1A
>> #define MAX17040_CMD 0xFE
>>
>>
>> #define MAX17040_DELAY 1000
>> #define MAX17040_BATTERY_FULL 95
>> +#define MAX17040_RCOMP_DEFAULT 0x9700
>>
>> -#define MAX17040_ATHD_MASK 0xFFC0
>> +#define MAX17040_ATHD_MASK 0x3f
>> +#define MAX17040_ALSC_MASK 0x40
>> #define MAX17040_ATHD_DEFAULT_POWER_UP 4
>> +#define MAX17040_STATUS_HD_MASK 0x1000
>> +#define MAX17040_STATUS_SC_MASK 0x2000
>> +#define MAX17040_CFG_RCOMP_MASK 0xff00
>> +
>> +enum chip_id {
>> + ID_MAX17040,
>> + ID_MAX17041,
>> + ID_MAX17043,
>> + ID_MAX17044,
>> + ID_MAX17048,
>> + ID_MAX17049,
>> + ID_MAX17058,
>> + ID_MAX17059,
>> +};
>> +
>> +/* values that differ by chip_id */
>> +struct chip_data {
>> + u16 reset_val;
>> + u16 vcell_shift;
>> + u16 vcell_mul;
>> + u16 vcell_div;
>> + u8 rcomp_bytes;
>> + u8 has_low_soc_alert;
>> + u8 has_soc_alert;
>> +};
>> +
>> +static struct chip_data max17040_family[] = {
>> + [ID_MAX17040] = {
>> + .reset_val = 0x0054,
>> + .vcell_shift = 4,
>> + .vcell_mul = 1250,
>> + .vcell_div = 1,
>> + .rcomp_bytes = 2,
>> + .has_low_soc_alert = 0,
>> + .has_soc_alert = 0,
>> + },
>> + [ID_MAX17041] = {
>> + .reset_val = 0x0054,
>> + .vcell_shift = 4,
>> + .vcell_mul = 2500,
>> + .vcell_div = 1,
>> + .rcomp_bytes = 2,
>> + .has_low_soc_alert = 0,
>> + .has_soc_alert = 0,
>> + },
>> + [ID_MAX17043] = {
>> + .reset_val = 0x0054,
>> + .vcell_shift = 4,
>> + .vcell_mul = 1250,
>> + .vcell_div = 1,
>> + .rcomp_bytes = 1,
>> + .has_low_soc_alert = 1,
>> + .has_soc_alert = 0,
>> + },
>> + [ID_MAX17044] = {
>> + .reset_val = 0x0054,
>> + .vcell_shift = 4,
>> + .vcell_mul = 2500,
>> + .vcell_div = 1,
>> + .rcomp_bytes = 1,
>> + .has_low_soc_alert = 1,
>> + .has_soc_alert = 0,
>> + },
>> + [ID_MAX17048] = {
>> + .reset_val = 0x5400,
>> + .vcell_shift = 0,
>> + .vcell_mul = 625,
>> + .vcell_div = 8,
>> + .rcomp_bytes = 1,
>> + .has_low_soc_alert = 1,
>> + .has_soc_alert = 1,
>> + },
>> + [ID_MAX17049] = {
>> + .reset_val = 0x5400,
>> + .vcell_shift = 0,
>> + .vcell_mul = 625,
>> + .vcell_div = 4,
>> + .rcomp_bytes = 1,
>> + .has_low_soc_alert = 1,
>> + .has_soc_alert = 1,
>> + },
>> + [ID_MAX17058] = {
>> + .reset_val = 0x5400,
>> + .vcell_shift = 0,
>> + .vcell_mul = 625,
>> + .vcell_div = 8,
>> + .rcomp_bytes = 1,
>> + .has_low_soc_alert = 1,
>> + .has_soc_alert = 0,
>> + },
>> + [ID_MAX17059] = {
>> + .reset_val = 0x5400,
>> + .vcell_shift = 0,
>> + .vcell_mul = 625,
>> + .vcell_div = 4,
>> + .rcomp_bytes = 1,
>> + .has_low_soc_alert = 1,
>> + .has_soc_alert = 0,
>> + },
>> +};
>>
>> struct max17040_chip {
>> struct i2c_client *client;
>> + struct regmap *regmap;
>> struct delayed_work work;
>> struct power_supply *battery;
>> struct max17040_platform_data *pdata;
>> + struct chip_data data;
>>
>> - /* State Of Connect */
>> - int online;
>> - /* battery voltage */
>> - int vcell;
>> /* battery capacity */
>> int soc;
>> /* State Of Charge */
>> int status;
>> +
>> /* Low alert threshold from 32% to 1% of the State of Charge */
>> u32 low_soc_alert;
>> + /* some devices return twice the capacity */
>> + bool quirk_double_soc;
>> + /* resetting causes some devices to show inaccurate reading */
>> + bool quirk_skip_reset;
>> + /* higher 8 bits for 17043+, 16 bits for 17040,41 */
>> + u16 rcomp;
>> };
>>
>> -static int max17040_get_property(struct power_supply *psy,
>> - enum power_supply_property psp,
>> - union power_supply_propval *val)
>> +static int max17040_reset(struct max17040_chip *chip)
>> {
>> - struct max17040_chip *chip = power_supply_get_drvdata(psy);
>> -
>> - switch (psp) {
>> - case POWER_SUPPLY_PROP_STATUS:
>> - val->intval = chip->status;
>> - break;
>> - case POWER_SUPPLY_PROP_ONLINE:
>> - val->intval = chip->online;
>> - break;
>> - case POWER_SUPPLY_PROP_VOLTAGE_NOW:
>> - val->intval = chip->vcell;
>> - break;
>> - case POWER_SUPPLY_PROP_CAPACITY:
>> - val->intval = chip->soc;
>> - break;
>> - default:
>> - return -EINVAL;
>> - }
>> - return 0;
>> + return regmap_write(chip->regmap, MAX17040_CMD, chip->data.reset_val);
>> }
>>
>> -static int max17040_write_reg(struct i2c_client *client, int reg, u16 value)
>> +static int max17040_set_low_soc_alert(struct max17040_chip *chip, u32 level)
>> {
>> - int ret;
>> -
>> - ret = i2c_smbus_write_word_swapped(client, reg, value);
>> -
>> - if (ret < 0)
>> - dev_err(&client->dev, "%s: err %d\n", __func__, ret);
>> + level = 32 - level;
>> + return regmap_update_bits(chip->regmap, MAX17040_CONFIG,
>> + MAX17040_ATHD_MASK, level);
>> +}
>>
>> - return ret;
>> +static int max17040_set_soc_alert(struct max17040_chip *chip, bool enable)
>> +{
>> + return regmap_update_bits(chip->regmap, MAX17040_CONFIG,
>> + MAX17040_ALSC_MASK, enable ? MAX17040_ALSC_MASK : 0);
>> }
>>
>> -static int max17040_read_reg(struct i2c_client *client, int reg)
>> +/* Returns true if alert cause was SOC change, not low SOC */
>> +static bool max17040_handle_soc_alert(struct max17040_chip *chip)
>> {
>> - int ret;
>> + bool ret = true;
>> + u32 data;
>>
>> - ret = i2c_smbus_read_word_swapped(client, reg);
>> + regmap_read(chip->regmap, MAX17040_STATUS, &data);
>>
>> - if (ret < 0)
>> - dev_err(&client->dev, "%s: err %d\n", __func__, ret);
>> + if (data & MAX17040_STATUS_HD_MASK) {
>> + // this alert was caused by low soc
>> + ret = false;
>> + }
>> + if (data & MAX17040_STATUS_SC_MASK) {
>> + // soc change bit -- deassert to mark as handled
>> + regmap_write(chip->regmap, MAX17040_STATUS,
>> + data & ~MAX17040_STATUS_SC_MASK);
>> + }
>>
>> return ret;
>> }
>>
>> -static void max17040_reset(struct i2c_client *client)
>> +static int max17040_set_rcomp(struct max17040_chip *chip, u16 rcomp)
>> {
>> - max17040_write_reg(client, MAX17040_CMD, 0x0054);
>> + u16 mask = chip->data.rcomp_bytes == 2 ?
>> + 0xffff : MAX17040_CFG_RCOMP_MASK;
>> +
>> + return regmap_update_bits(chip->regmap, MAX17040_CONFIG, mask, rcomp);
>> }
>>
>> -static int max17040_set_low_soc_alert(struct i2c_client *client, u32 level)
>> +static int max17040_raw_vcell_to_uvolts(struct max17040_chip *chip, u16 vcell)
>> {
>> - int ret;
>> - u16 data;
>> -
>> - level = 32 - level;
>> - data = max17040_read_reg(client, MAX17040_RCOMP);
>> - /* clear the alrt bit and set LSb 5 bits */
>> - data &= MAX17040_ATHD_MASK;
>> - data |= level;
>> - ret = max17040_write_reg(client, MAX17040_RCOMP, data);
>> + struct chip_data *d = &chip->data;
>>
>> - return ret;
>> + return (vcell >> d->vcell_shift) * d->vcell_mul / d->vcell_div;
>> }
>>
>> -static void max17040_get_vcell(struct i2c_client *client)
>> +static int max17040_get_vcell(struct max17040_chip *chip)
>> {
>> - struct max17040_chip *chip = i2c_get_clientdata(client);
>> - u16 vcell;
>> + u32 vcell;
>>
>> - vcell = max17040_read_reg(client, MAX17040_VCELL);
>> + regmap_read(chip->regmap, MAX17040_VCELL, &vcell);
>>
>> - chip->vcell = (vcell >> 4) * 1250;
>> + return max17040_raw_vcell_to_uvolts(chip, vcell);
>> }
>>
>> -static void max17040_get_soc(struct i2c_client *client)
>> +static int max17040_raw_soc_to_percent(struct max17040_chip *chip, u16 soc)
>> {
>> - struct max17040_chip *chip = i2c_get_clientdata(client);
>> - u16 soc;
>> + int shift = 8;
>>
>> - soc = max17040_read_reg(client, MAX17040_SOC);
>> + if (chip->quirk_double_soc)
>> + shift += 1;
>>
>> - chip->soc = (soc >> 8);
>> + return soc >> shift;
>> }
>>
>> -static void max17040_get_version(struct i2c_client *client)
>> +static int max17040_get_soc(struct max17040_chip *chip)
>> {
>> - u16 version;
>> + u32 soc;
>>
>> - version = max17040_read_reg(client, MAX17040_VER);
>> + regmap_read(chip->regmap, MAX17040_SOC, &soc);
>>
>> - dev_info(&client->dev, "MAX17040 Fuel-Gauge Ver 0x%x\n", version);
>> + return max17040_raw_soc_to_percent(chip, soc);
>> }
>>
>> -static void max17040_get_online(struct i2c_client *client)
>> +static void max17040_get_version(struct max17040_chip *chip)
>> {
>> - struct max17040_chip *chip = i2c_get_clientdata(client);
>> + u32 version;
>>
>> - if (chip->pdata && chip->pdata->battery_online)
>> - chip->online = chip->pdata->battery_online();
>> - else
>> - chip->online = 1;
>> + regmap_read(chip->regmap, MAX17040_VER, &version);
>> +
>> + dev_dbg(&chip->client->dev, "MAX17040 Fuel-Gauge Ver 0x%x\n", version);
>> }
>>
>> -static void max17040_get_status(struct i2c_client *client)
>> +static int max17040_get_online(struct max17040_chip *chip)
>> {
>> - struct max17040_chip *chip = i2c_get_clientdata(client);
>> + return chip->pdata && chip->pdata->battery_online ?
>> + chip->pdata->battery_online() : 1;
>> +}
>>
>> +static int max17040_get_status(struct max17040_chip *chip)
>> +{
>> if (!chip->pdata || !chip->pdata->charger_online
>> || !chip->pdata->charger_enable) {
>> - chip->status = POWER_SUPPLY_STATUS_UNKNOWN;
>> - return;
>> + return POWER_SUPPLY_STATUS_UNKNOWN;
>> }
>>
>> + if (max17040_get_soc(chip) > MAX17040_BATTERY_FULL)
>> + return POWER_SUPPLY_STATUS_FULL;
>> +
>> if (chip->pdata->charger_online()) {
>> if (chip->pdata->charger_enable())
>> - chip->status = POWER_SUPPLY_STATUS_CHARGING;
>> + return POWER_SUPPLY_STATUS_CHARGING;
>> else
>> - chip->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
>> + return POWER_SUPPLY_STATUS_NOT_CHARGING;
>> } else {
>> - chip->status = POWER_SUPPLY_STATUS_DISCHARGING;
>> + return POWER_SUPPLY_STATUS_DISCHARGING;
>> }
>> +}
>> +
>> +static int max17040_get_property(struct power_supply *psy,
>> + enum power_supply_property psp,
>> + union power_supply_propval *val)
>> +{
>> + struct max17040_chip *chip = power_supply_get_drvdata(psy);
>>
>> - if (chip->soc > MAX17040_BATTERY_FULL)
>> - chip->status = POWER_SUPPLY_STATUS_FULL;
>> + switch (psp) {
>> + case POWER_SUPPLY_PROP_STATUS:
>> + val->intval = max17040_get_status(chip);
>> + break;
>> + case POWER_SUPPLY_PROP_ONLINE:
>> + val->intval = max17040_get_online(chip);
>> + break;
>> + case POWER_SUPPLY_PROP_VOLTAGE_NOW:
>> + val->intval = max17040_get_vcell(chip);
>> + break;
>> + case POWER_SUPPLY_PROP_CAPACITY:
>> + val->intval = max17040_get_soc(chip);
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> + return 0;
>> }
>>
>> +
>> static int max17040_get_of_data(struct max17040_chip *chip)
>> {
>> struct device *dev = &chip->client->dev;
>> + struct chip_data *data = &max17040_family[
>> + (enum chip_id) of_device_get_match_data(dev)];
>> + int rcomp_len;
>> + u8 rcomp[2];
>>
>> chip->low_soc_alert = MAX17040_ATHD_DEFAULT_POWER_UP;
>> device_property_read_u32(dev,
>> "maxim,alert-low-soc-level",
>> &chip->low_soc_alert);
>>
>> - if (chip->low_soc_alert <= 0 || chip->low_soc_alert >= 33)
>> + if (chip->low_soc_alert <= 0 || chip->low_soc_alert >= 33) {
>> + dev_err(dev, "maxim,alert-low-soc-level out of bounds\n");
>> return -EINVAL;
>> + }
>> +
>> + chip->quirk_double_soc = device_property_read_bool(dev,
>> + "maxim,double-soc");
>> + chip->quirk_skip_reset = device_property_read_bool(dev,
>> + "maxim,skip-reset");
>> + rcomp_len = device_property_count_u8(dev, "maxim,rcomp");
>> + chip->rcomp = MAX17040_RCOMP_DEFAULT;
>> + if (rcomp_len == data->rcomp_bytes) {
>> + device_property_read_u8_array(dev, "maxim,rcomp",
>> + rcomp, rcomp_len);
>> + chip->rcomp = rcomp_len == 2 ?
>> + rcomp[0] << 8 | rcomp[1] :
>> + rcomp[0] << 8;
>> + } else if (rcomp_len > 0) {
>> + dev_err(dev, "maxim,rcomp has incorrect length\n");
>> + return -EINVAL;
>> + }
>>
>> return 0;
>> }
>>
>> -static void max17040_check_changes(struct i2c_client *client)
>> +static void max17040_check_changes(struct max17040_chip *chip)
>> {
>> - max17040_get_vcell(client);
>> - max17040_get_soc(client);
>> - max17040_get_online(client);
>> - max17040_get_status(client);
>> + chip->soc = max17040_get_soc(chip);
>> + chip->status = max17040_get_status(chip);
>> +}
>> +
>> +static void max17040_queue_work(struct max17040_chip *chip)
>> +{
>> + queue_delayed_work(system_power_efficient_wq, &chip->work,
>> + MAX17040_DELAY);
>> }
>>
>> static void max17040_work(struct work_struct *work)
>> @@ -214,35 +363,42 @@ static void max17040_work(struct work_struct *work)
>> /* store SOC and status to check changes */
>> last_soc = chip->soc;
>> last_status = chip->status;
>> - max17040_check_changes(chip->client);
>> + max17040_check_changes(chip);
>>
>> /* check changes and send uevent */
>> if (last_soc != chip->soc || last_status != chip->status)
>> power_supply_changed(chip->battery);
>>
>> - queue_delayed_work(system_power_efficient_wq, &chip->work,
>> - MAX17040_DELAY);
>> + max17040_queue_work(chip);
>> +}
>> +
>> +static void max17040_stop_work(void *data)
>> +{
>> + struct max17040_chip *chip = data;
>> +
>> + cancel_delayed_work_sync(&chip->work);
>> }
>>
>> static irqreturn_t max17040_thread_handler(int id, void *dev)
>> {
>> struct max17040_chip *chip = dev;
>> - struct i2c_client *client = chip->client;
>>
>> - dev_warn(&client->dev, "IRQ: Alert battery low level");
>> + if (!(chip->data.has_soc_alert && max17040_handle_soc_alert(chip)))
>> + dev_warn(&chip->client->dev, "IRQ: Alert battery low level\n");
>> +
>> /* read registers */
>> - max17040_check_changes(chip->client);
>> + max17040_check_changes(chip);
>>
>> /* send uevent */
>> power_supply_changed(chip->battery);
>>
>> - /* reset alert bit */
>> - max17040_set_low_soc_alert(client, chip->low_soc_alert);
>> + /* reset low soc alert bit */
>> + max17040_set_low_soc_alert(chip, chip->low_soc_alert);
>>
>> return IRQ_HANDLED;
>> }
>>
>> -static int max17040_enable_alert_irq(struct max17040_chip *chip)
>> +static int max17040_setup_irq(struct max17040_chip *chip)
>> {
>> struct i2c_client *client = chip->client;
>> unsigned int flags;
>> @@ -256,6 +412,13 @@ static int max17040_enable_alert_irq(struct max17040_chip *chip)
>> return ret;
>> }
>>
>> +static const struct regmap_config max17040_regmap = {
>> + .reg_bits = 8,
>> + .reg_stride = 2,
>> + .val_bits = 16,
>> + .val_format_endian = REGMAP_ENDIAN_BIG,
>> +};
>> +
>> static enum power_supply_property max17040_battery_props[] = {
>> POWER_SUPPLY_PROP_STATUS,
>> POWER_SUPPLY_PROP_ONLINE,
>> @@ -277,6 +440,8 @@ static int max17040_probe(struct i2c_client *client,
>> struct i2c_adapter *adapter = client->adapter;
>> struct power_supply_config psy_cfg = {};
>> struct max17040_chip *chip;
>> + enum chip_id chip_id;
>> + bool enable_irq = false;
>> int ret;
>>
>> if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
>> @@ -287,38 +452,63 @@ static int max17040_probe(struct i2c_client *client,
>> return -ENOMEM;
>>
>> chip->client = client;
>> + chip->regmap = devm_regmap_init_i2c(client, &max17040_regmap);
>> chip->pdata = client->dev.platform_data;
>> - ret = max17040_get_of_data(chip);
>> - if (ret) {
>> - dev_err(&client->dev,
>> - "failed: low SOC alert OF data out of bounds\n");
>> - return ret;
>> + chip_id = (enum chip_id) id->driver_data;
>> + if (client->dev.of_node) {
>> + ret = max17040_get_of_data(chip);
>> + if (ret)
>> + return ret;
>> + chip_id = (enum chip_id) of_device_get_match_data(&client->dev);
>> }
>> + chip->data = max17040_family[chip_id];
>>
>> i2c_set_clientdata(client, chip);
>> psy_cfg.drv_data = chip;
>>
>> - chip->battery = power_supply_register(&client->dev,
>> - &max17040_battery_desc, &psy_cfg);
>> + chip->battery = devm_power_supply_register(&client->dev,
>> + &max17040_battery_desc, &psy_cfg);
>> if (IS_ERR(chip->battery)) {
>> dev_err(&client->dev, "failed: power supply register\n");
>> return PTR_ERR(chip->battery);
>> }
>>
>> - max17040_reset(client);
>> - max17040_get_version(client);
>> + if (!chip->quirk_skip_reset) {
>> + max17040_reset(chip);
>> + }
>> + max17040_get_version(chip);
>> + max17040_set_rcomp(chip, chip->rcomp);
>>
>> /* check interrupt */
>> - if (client->irq && of_device_is_compatible(client->dev.of_node,
>> - "maxim,max77836-battery")) {
>> - ret = max17040_set_low_soc_alert(client, chip->low_soc_alert);
>> + if (client->irq && chip->data.has_low_soc_alert) {
>> + ret = max17040_set_low_soc_alert(chip, chip->low_soc_alert);
>> if (ret) {
>> dev_err(&client->dev,
>> "Failed to set low SOC alert: err %d\n", ret);
>> return ret;
>> }
>> + enable_irq = true;
>> + }
>> +
>> + if (client->irq && chip->data.has_soc_alert) {
>> + ret = max17040_set_soc_alert(chip, 1);
>> + if (ret) {
>> + dev_err(&client->dev,
>> + "Failed to set SOC alert: err %d\n", ret);
>> + return ret;
>> + }
>> + enable_irq = true;
>> + } else {
>> + /* soc alerts negate the need for polling */
>> + INIT_DEFERRABLE_WORK(&chip->work, max17040_work);
>> + ret = devm_add_action(&client->dev, max17040_stop_work, chip);
>> + if (ret)
>> + return ret;
>> + max17040_queue_work(chip);
>> + }
>>
>> - ret = max17040_enable_alert_irq(chip);
>> + if (enable_irq) {
>> + ret = max17040_setup_irq(chip);
>> if (ret) {
>> client->irq = 0;
>> dev_warn(&client->dev,
>> @@ -326,19 +516,6 @@ static int max17040_probe(struct i2c_client *client,
>> }
>> }
>>
>> - INIT_DEFERRABLE_WORK(&chip->work, max17040_work);
>> - queue_delayed_work(system_power_efficient_wq, &chip->work,
>> - MAX17040_DELAY);
>> -
>> - return 0;
>> -}
>> -
>> -static int max17040_remove(struct i2c_client *client)
>> -{
>> - struct max17040_chip *chip = i2c_get_clientdata(client);
>> -
>> - power_supply_unregister(chip->battery);
>> - cancel_delayed_work(&chip->work);
>> return 0;
>> }
>>
>> @@ -349,10 +526,13 @@ static int max17040_suspend(struct device *dev)
>> struct i2c_client *client = to_i2c_client(dev);
>> struct max17040_chip *chip = i2c_get_clientdata(client);
>>
>> - cancel_delayed_work(&chip->work);
>> -
>> if (client->irq && device_may_wakeup(dev))
>> enable_irq_wake(client->irq);
>> + if (client->irq && chip->data.has_soc_alert)
>> + // disable soc alert to prevent wakeup
>> + max17040_set_soc_alert(chip, 0);
>> + else
>> + cancel_delayed_work(&chip->work);
>>
>> return 0;
>> }
>> @@ -362,11 +542,12 @@ static int max17040_resume(struct device *dev)
>> struct i2c_client *client = to_i2c_client(dev);
>> struct max17040_chip *chip = i2c_get_clientdata(client);
>>
>> - queue_delayed_work(system_power_efficient_wq, &chip->work,
>> - MAX17040_DELAY);
>> -
>> if (client->irq && device_may_wakeup(dev))
>> disable_irq_wake(client->irq);
>> + if (client->irq && chip->data.has_soc_alert)
>> + max17040_set_soc_alert(chip, 1);
>> + else
>> + max17040_queue_work(chip);
>>
>> return 0;
>> }
>> @@ -381,16 +562,30 @@ static SIMPLE_DEV_PM_OPS(max17040_pm_ops, max17040_suspend, max17040_resume);
>> #endif /* CONFIG_PM_SLEEP */
>>
>> static const struct i2c_device_id max17040_id[] = {
>> - { "max17040" },
>> - { "max77836-battery" },
>> - { }
>> + { "max17040", ID_MAX17040 },
>> + { "max17041", ID_MAX17041 },
>> + { "max17043", ID_MAX17043 },
>> + { "max77836-battery", ID_MAX17043 },
>> + { "max17044", ID_MAX17044 },
>> + { "max17048", ID_MAX17048 },
>> + { "max17049", ID_MAX17049 },
>> + { "max17058", ID_MAX17058 },
>> + { "max17059", ID_MAX17059 },
>> + { /* sentinel */ }
>> };
>> MODULE_DEVICE_TABLE(i2c, max17040_id);
>>
>> static const struct of_device_id max17040_of_match[] = {
>> - { .compatible = "maxim,max17040" },
>> - { .compatible = "maxim,max77836-battery" },
>> - { },
>> + { .compatible = "maxim,max17040", .data = (void *) ID_MAX17040 },
>> + { .compatible = "maxim,max17041", .data = (void *) ID_MAX17041 },
>> + { .compatible = "maxim,max17043", .data = (void *) ID_MAX17043 },
>> + { .compatible = "maxim,max77836-battery", .data = (void *) ID_MAX17043 },
>> + { .compatible = "maxim,max17044", .data = (void *) ID_MAX17044 },
>> + { .compatible = "maxim,max17048", .data = (void *) ID_MAX17048 },
>> + { .compatible = "maxim,max17049", .data = (void *) ID_MAX17049 },
>> + { .compatible = "maxim,max17058", .data = (void *) ID_MAX17058 },
>> + { .compatible = "maxim,max17059", .data = (void *) ID_MAX17059 },
>> + { /* sentinel */ },
>> };
>> MODULE_DEVICE_TABLE(of, max17040_of_match);
>>
>> @@ -401,7 +596,6 @@ static struct i2c_driver max17040_i2c_driver = {
>> .pm = MAX17040_PM_OPS,
>> },
>> .probe = max17040_probe,
>> - .remove = max17040_remove,
>> .id_table = max17040_id,
>> };
>> module_i2c_driver(max17040_i2c_driver);
>> --
>> 2.27.0
>>