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750 lines
19 KiB
750 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Fuel gauge driver for CellWise 2013 / 2015 |
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* |
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* Copyright (C) 2012, RockChip |
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* Copyright (C) 2020, Tobias Schramm |
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* |
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* Authors: xuhuicong <[email protected]> |
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* Authors: Tobias Schramm <[email protected]> |
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*/ |
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#include <linux/bits.h> |
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#include <linux/delay.h> |
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#include <linux/i2c.h> |
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#include <linux/gfp.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/power_supply.h> |
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#include <linux/property.h> |
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#include <linux/regmap.h> |
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#include <linux/time.h> |
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#include <linux/workqueue.h> |
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#define CW2015_SIZE_BATINFO 64 |
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#define CW2015_RESET_TRIES 5 |
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#define CW2015_REG_VERSION 0x00 |
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#define CW2015_REG_VCELL 0x02 |
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#define CW2015_REG_SOC 0x04 |
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#define CW2015_REG_RRT_ALERT 0x06 |
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#define CW2015_REG_CONFIG 0x08 |
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#define CW2015_REG_MODE 0x0A |
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#define CW2015_REG_BATINFO 0x10 |
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#define CW2015_MODE_SLEEP_MASK GENMASK(7, 6) |
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#define CW2015_MODE_SLEEP (0x03 << 6) |
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#define CW2015_MODE_NORMAL (0x00 << 6) |
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#define CW2015_MODE_QUICK_START (0x03 << 4) |
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#define CW2015_MODE_RESTART (0x0f << 0) |
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#define CW2015_CONFIG_UPDATE_FLG (0x01 << 1) |
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#define CW2015_ATHD(x) ((x) << 3) |
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#define CW2015_MASK_ATHD GENMASK(7, 3) |
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#define CW2015_MASK_SOC GENMASK(12, 0) |
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/* reset gauge of no valid state of charge could be polled for 40s */ |
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#define CW2015_BAT_SOC_ERROR_MS (40 * MSEC_PER_SEC) |
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/* reset gauge if state of charge stuck for half an hour during charging */ |
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#define CW2015_BAT_CHARGING_STUCK_MS (1800 * MSEC_PER_SEC) |
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/* poll interval from CellWise GPL Android driver example */ |
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#define CW2015_DEFAULT_POLL_INTERVAL_MS 8000 |
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#define CW2015_AVERAGING_SAMPLES 3 |
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struct cw_battery { |
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struct device *dev; |
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struct workqueue_struct *battery_workqueue; |
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struct delayed_work battery_delay_work; |
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struct regmap *regmap; |
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struct power_supply *rk_bat; |
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struct power_supply_battery_info battery; |
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u8 *bat_profile; |
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bool charger_attached; |
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bool battery_changed; |
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int soc; |
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int voltage_mv; |
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int status; |
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int time_to_empty; |
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int charge_count; |
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u32 poll_interval_ms; |
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u8 alert_level; |
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unsigned int read_errors; |
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unsigned int charge_stuck_cnt; |
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}; |
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static int cw_read_word(struct cw_battery *cw_bat, u8 reg, u16 *val) |
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{ |
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__be16 value; |
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int ret; |
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ret = regmap_bulk_read(cw_bat->regmap, reg, &value, sizeof(value)); |
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if (ret) |
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return ret; |
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*val = be16_to_cpu(value); |
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return 0; |
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} |
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static int cw_update_profile(struct cw_battery *cw_bat) |
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{ |
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int ret; |
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unsigned int reg_val; |
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u8 reset_val; |
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/* make sure gauge is not in sleep mode */ |
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ret = regmap_read(cw_bat->regmap, CW2015_REG_MODE, ®_val); |
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if (ret) |
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return ret; |
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reset_val = reg_val; |
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if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) { |
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dev_err(cw_bat->dev, |
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"Gauge is in sleep mode, can't update battery info\n"); |
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return -EINVAL; |
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} |
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/* write new battery info */ |
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ret = regmap_raw_write(cw_bat->regmap, CW2015_REG_BATINFO, |
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cw_bat->bat_profile, |
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CW2015_SIZE_BATINFO); |
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if (ret) |
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return ret; |
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/* set config update flag */ |
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reg_val |= CW2015_CONFIG_UPDATE_FLG; |
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reg_val &= ~CW2015_MASK_ATHD; |
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reg_val |= CW2015_ATHD(cw_bat->alert_level); |
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ret = regmap_write(cw_bat->regmap, CW2015_REG_CONFIG, reg_val); |
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if (ret) |
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return ret; |
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/* reset gauge to apply new battery profile */ |
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reset_val &= ~CW2015_MODE_RESTART; |
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reg_val = reset_val | CW2015_MODE_RESTART; |
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reg_val); |
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if (ret) |
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return ret; |
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/* wait for gauge to reset */ |
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msleep(20); |
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/* clear reset flag */ |
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val); |
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if (ret) |
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return ret; |
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/* wait for gauge to become ready */ |
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ret = regmap_read_poll_timeout(cw_bat->regmap, CW2015_REG_SOC, |
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reg_val, reg_val <= 100, |
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10 * USEC_PER_MSEC, 10 * USEC_PER_SEC); |
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if (ret) |
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dev_err(cw_bat->dev, |
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"Gauge did not become ready after profile upload\n"); |
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else |
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dev_dbg(cw_bat->dev, "Battery profile updated\n"); |
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return ret; |
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} |
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static int cw_init(struct cw_battery *cw_bat) |
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{ |
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int ret; |
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unsigned int reg_val = CW2015_MODE_SLEEP; |
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if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) { |
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reg_val = CW2015_MODE_NORMAL; |
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reg_val); |
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if (ret) |
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return ret; |
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} |
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ret = regmap_read(cw_bat->regmap, CW2015_REG_CONFIG, ®_val); |
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if (ret) |
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return ret; |
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if ((reg_val & CW2015_MASK_ATHD) != CW2015_ATHD(cw_bat->alert_level)) { |
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dev_dbg(cw_bat->dev, "Setting new alert level\n"); |
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reg_val &= ~CW2015_MASK_ATHD; |
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reg_val |= ~CW2015_ATHD(cw_bat->alert_level); |
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ret = regmap_write(cw_bat->regmap, CW2015_REG_CONFIG, reg_val); |
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if (ret) |
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return ret; |
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} |
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ret = regmap_read(cw_bat->regmap, CW2015_REG_CONFIG, ®_val); |
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if (ret) |
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return ret; |
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if (!(reg_val & CW2015_CONFIG_UPDATE_FLG)) { |
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dev_dbg(cw_bat->dev, |
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"Battery profile not present, uploading battery profile\n"); |
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if (cw_bat->bat_profile) { |
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ret = cw_update_profile(cw_bat); |
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if (ret) { |
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dev_err(cw_bat->dev, |
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"Failed to upload battery profile\n"); |
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return ret; |
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} |
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} else { |
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dev_warn(cw_bat->dev, |
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"No profile specified, continuing without profile\n"); |
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} |
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} else if (cw_bat->bat_profile) { |
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u8 bat_info[CW2015_SIZE_BATINFO]; |
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ret = regmap_raw_read(cw_bat->regmap, CW2015_REG_BATINFO, |
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bat_info, CW2015_SIZE_BATINFO); |
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if (ret) { |
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dev_err(cw_bat->dev, |
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"Failed to read stored battery profile\n"); |
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return ret; |
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} |
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if (memcmp(bat_info, cw_bat->bat_profile, CW2015_SIZE_BATINFO)) { |
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dev_warn(cw_bat->dev, "Replacing stored battery profile\n"); |
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ret = cw_update_profile(cw_bat); |
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if (ret) |
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return ret; |
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} |
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} else { |
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dev_warn(cw_bat->dev, |
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"Can't check current battery profile, no profile provided\n"); |
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} |
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dev_dbg(cw_bat->dev, "Battery profile configured\n"); |
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return 0; |
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} |
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static int cw_power_on_reset(struct cw_battery *cw_bat) |
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{ |
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int ret; |
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unsigned char reset_val; |
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reset_val = CW2015_MODE_SLEEP; |
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val); |
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if (ret) |
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return ret; |
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/* wait for gauge to enter sleep */ |
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msleep(20); |
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reset_val = CW2015_MODE_NORMAL; |
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ret = regmap_write(cw_bat->regmap, CW2015_REG_MODE, reset_val); |
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if (ret) |
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return ret; |
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ret = cw_init(cw_bat); |
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if (ret) |
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return ret; |
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return 0; |
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} |
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#define HYSTERESIS(current, previous, up, down) \ |
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(((current) < (previous) + (up)) && ((current) > (previous) - (down))) |
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static int cw_get_soc(struct cw_battery *cw_bat) |
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{ |
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unsigned int soc; |
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int ret; |
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ret = regmap_read(cw_bat->regmap, CW2015_REG_SOC, &soc); |
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if (ret) |
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return ret; |
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if (soc > 100) { |
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int max_error_cycles = |
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CW2015_BAT_SOC_ERROR_MS / cw_bat->poll_interval_ms; |
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dev_err(cw_bat->dev, "Invalid SoC %d%%\n", soc); |
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cw_bat->read_errors++; |
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if (cw_bat->read_errors > max_error_cycles) { |
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dev_warn(cw_bat->dev, |
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"Too many invalid SoC reports, resetting gauge\n"); |
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cw_power_on_reset(cw_bat); |
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cw_bat->read_errors = 0; |
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} |
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return cw_bat->soc; |
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} |
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cw_bat->read_errors = 0; |
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/* Reset gauge if stuck while charging */ |
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if (cw_bat->status == POWER_SUPPLY_STATUS_CHARGING && soc == cw_bat->soc) { |
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int max_stuck_cycles = |
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CW2015_BAT_CHARGING_STUCK_MS / cw_bat->poll_interval_ms; |
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cw_bat->charge_stuck_cnt++; |
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if (cw_bat->charge_stuck_cnt > max_stuck_cycles) { |
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dev_warn(cw_bat->dev, |
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"SoC stuck @%u%%, resetting gauge\n", soc); |
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cw_power_on_reset(cw_bat); |
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cw_bat->charge_stuck_cnt = 0; |
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} |
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} else { |
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cw_bat->charge_stuck_cnt = 0; |
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} |
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/* Ignore voltage dips during charge */ |
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if (cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 0, 3)) |
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soc = cw_bat->soc; |
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/* Ignore voltage spikes during discharge */ |
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if (!cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 3, 0)) |
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soc = cw_bat->soc; |
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return soc; |
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} |
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static int cw_get_voltage(struct cw_battery *cw_bat) |
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{ |
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int ret, i, voltage_mv; |
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u16 reg_val; |
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u32 avg = 0; |
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for (i = 0; i < CW2015_AVERAGING_SAMPLES; i++) { |
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ret = cw_read_word(cw_bat, CW2015_REG_VCELL, ®_val); |
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if (ret) |
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return ret; |
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avg += reg_val; |
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} |
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avg /= CW2015_AVERAGING_SAMPLES; |
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/* |
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* 305 uV per ADC step |
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* Use 312 / 1024 as efficient approximation of 305 / 1000 |
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* Negligible error of 0.1% |
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*/ |
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voltage_mv = avg * 312 / 1024; |
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dev_dbg(cw_bat->dev, "Read voltage: %d mV, raw=0x%04x\n", |
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voltage_mv, reg_val); |
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return voltage_mv; |
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} |
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static int cw_get_time_to_empty(struct cw_battery *cw_bat) |
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{ |
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int ret; |
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u16 value16; |
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ret = cw_read_word(cw_bat, CW2015_REG_RRT_ALERT, &value16); |
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if (ret) |
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return ret; |
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return value16 & CW2015_MASK_SOC; |
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} |
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static void cw_update_charge_status(struct cw_battery *cw_bat) |
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{ |
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int ret; |
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ret = power_supply_am_i_supplied(cw_bat->rk_bat); |
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if (ret < 0) { |
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dev_warn(cw_bat->dev, "Failed to get supply state: %d\n", ret); |
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} else { |
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bool charger_attached; |
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charger_attached = !!ret; |
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if (cw_bat->charger_attached != charger_attached) { |
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cw_bat->battery_changed = true; |
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if (charger_attached) |
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cw_bat->charge_count++; |
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} |
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cw_bat->charger_attached = charger_attached; |
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} |
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} |
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static void cw_update_soc(struct cw_battery *cw_bat) |
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{ |
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int soc; |
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soc = cw_get_soc(cw_bat); |
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if (soc < 0) |
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dev_err(cw_bat->dev, "Failed to get SoC from gauge: %d\n", soc); |
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else if (cw_bat->soc != soc) { |
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cw_bat->soc = soc; |
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cw_bat->battery_changed = true; |
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} |
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} |
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static void cw_update_voltage(struct cw_battery *cw_bat) |
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{ |
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int voltage_mv; |
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voltage_mv = cw_get_voltage(cw_bat); |
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if (voltage_mv < 0) |
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dev_err(cw_bat->dev, "Failed to get voltage from gauge: %d\n", |
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voltage_mv); |
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else |
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cw_bat->voltage_mv = voltage_mv; |
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} |
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static void cw_update_status(struct cw_battery *cw_bat) |
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{ |
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int status = POWER_SUPPLY_STATUS_DISCHARGING; |
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if (cw_bat->charger_attached) { |
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if (cw_bat->soc >= 100) |
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status = POWER_SUPPLY_STATUS_FULL; |
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else |
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status = POWER_SUPPLY_STATUS_CHARGING; |
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} |
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if (cw_bat->status != status) |
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cw_bat->battery_changed = true; |
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cw_bat->status = status; |
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} |
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static void cw_update_time_to_empty(struct cw_battery *cw_bat) |
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{ |
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int time_to_empty; |
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time_to_empty = cw_get_time_to_empty(cw_bat); |
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if (time_to_empty < 0) |
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dev_err(cw_bat->dev, "Failed to get time to empty from gauge: %d\n", |
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time_to_empty); |
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else if (cw_bat->time_to_empty != time_to_empty) { |
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cw_bat->time_to_empty = time_to_empty; |
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cw_bat->battery_changed = true; |
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} |
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} |
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static void cw_bat_work(struct work_struct *work) |
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{ |
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struct delayed_work *delay_work; |
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struct cw_battery *cw_bat; |
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int ret; |
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unsigned int reg_val; |
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delay_work = to_delayed_work(work); |
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cw_bat = container_of(delay_work, struct cw_battery, battery_delay_work); |
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ret = regmap_read(cw_bat->regmap, CW2015_REG_MODE, ®_val); |
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if (ret) { |
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dev_err(cw_bat->dev, "Failed to read mode from gauge: %d\n", ret); |
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} else { |
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if ((reg_val & CW2015_MODE_SLEEP_MASK) == CW2015_MODE_SLEEP) { |
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int i; |
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for (i = 0; i < CW2015_RESET_TRIES; i++) { |
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if (!cw_power_on_reset(cw_bat)) |
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break; |
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} |
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} |
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cw_update_soc(cw_bat); |
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cw_update_voltage(cw_bat); |
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cw_update_charge_status(cw_bat); |
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cw_update_status(cw_bat); |
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cw_update_time_to_empty(cw_bat); |
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} |
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dev_dbg(cw_bat->dev, "charger_attached = %d\n", cw_bat->charger_attached); |
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dev_dbg(cw_bat->dev, "status = %d\n", cw_bat->status); |
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dev_dbg(cw_bat->dev, "soc = %d%%\n", cw_bat->soc); |
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dev_dbg(cw_bat->dev, "voltage = %dmV\n", cw_bat->voltage_mv); |
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if (cw_bat->battery_changed) |
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power_supply_changed(cw_bat->rk_bat); |
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cw_bat->battery_changed = false; |
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queue_delayed_work(cw_bat->battery_workqueue, |
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&cw_bat->battery_delay_work, |
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msecs_to_jiffies(cw_bat->poll_interval_ms)); |
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} |
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static bool cw_battery_valid_time_to_empty(struct cw_battery *cw_bat) |
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{ |
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return cw_bat->time_to_empty > 0 && |
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cw_bat->time_to_empty < CW2015_MASK_SOC && |
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cw_bat->status == POWER_SUPPLY_STATUS_DISCHARGING; |
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} |
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static int cw_battery_get_property(struct power_supply *psy, |
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enum power_supply_property psp, |
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union power_supply_propval *val) |
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{ |
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struct cw_battery *cw_bat; |
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cw_bat = power_supply_get_drvdata(psy); |
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switch (psp) { |
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case POWER_SUPPLY_PROP_CAPACITY: |
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val->intval = cw_bat->soc; |
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break; |
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case POWER_SUPPLY_PROP_STATUS: |
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val->intval = cw_bat->status; |
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break; |
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case POWER_SUPPLY_PROP_PRESENT: |
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val->intval = !!cw_bat->voltage_mv; |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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val->intval = cw_bat->voltage_mv * 1000; |
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break; |
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case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: |
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if (cw_battery_valid_time_to_empty(cw_bat)) |
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val->intval = cw_bat->time_to_empty; |
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else |
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val->intval = 0; |
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break; |
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case POWER_SUPPLY_PROP_TECHNOLOGY: |
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val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
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break; |
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case POWER_SUPPLY_PROP_CHARGE_COUNTER: |
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val->intval = cw_bat->charge_count; |
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break; |
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case POWER_SUPPLY_PROP_CHARGE_FULL: |
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case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
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if (cw_bat->battery.charge_full_design_uah > 0) |
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val->intval = cw_bat->battery.charge_full_design_uah; |
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else |
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val->intval = 0; |
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break; |
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case POWER_SUPPLY_PROP_CURRENT_NOW: |
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if (cw_battery_valid_time_to_empty(cw_bat) && |
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cw_bat->battery.charge_full_design_uah > 0) { |
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/* calculate remaining capacity */ |
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val->intval = cw_bat->battery.charge_full_design_uah; |
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val->intval = val->intval * cw_bat->soc / 100; |
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/* estimate current based on time to empty */ |
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val->intval = 60 * val->intval / cw_bat->time_to_empty; |
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} else { |
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val->intval = 0; |
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} |
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break; |
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default: |
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break; |
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} |
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return 0; |
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} |
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static enum power_supply_property cw_battery_properties[] = { |
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POWER_SUPPLY_PROP_CAPACITY, |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, |
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POWER_SUPPLY_PROP_TECHNOLOGY, |
|
POWER_SUPPLY_PROP_CHARGE_COUNTER, |
|
POWER_SUPPLY_PROP_CHARGE_FULL, |
|
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
|
POWER_SUPPLY_PROP_CURRENT_NOW, |
|
}; |
|
|
|
static const struct power_supply_desc cw2015_bat_desc = { |
|
.name = "cw2015-battery", |
|
.type = POWER_SUPPLY_TYPE_BATTERY, |
|
.properties = cw_battery_properties, |
|
.num_properties = ARRAY_SIZE(cw_battery_properties), |
|
.get_property = cw_battery_get_property, |
|
}; |
|
|
|
static int cw2015_parse_properties(struct cw_battery *cw_bat) |
|
{ |
|
struct device *dev = cw_bat->dev; |
|
int length; |
|
int ret; |
|
|
|
length = device_property_count_u8(dev, "cellwise,battery-profile"); |
|
if (length < 0) { |
|
dev_warn(cw_bat->dev, |
|
"No battery-profile found, using current flash contents\n"); |
|
} else if (length != CW2015_SIZE_BATINFO) { |
|
dev_err(cw_bat->dev, "battery-profile must be %d bytes\n", |
|
CW2015_SIZE_BATINFO); |
|
return -EINVAL; |
|
} else { |
|
cw_bat->bat_profile = devm_kzalloc(dev, length, GFP_KERNEL); |
|
if (!cw_bat->bat_profile) |
|
return -ENOMEM; |
|
|
|
ret = device_property_read_u8_array(dev, |
|
"cellwise,battery-profile", |
|
cw_bat->bat_profile, |
|
length); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
ret = device_property_read_u32(dev, "cellwise,monitor-interval-ms", |
|
&cw_bat->poll_interval_ms); |
|
if (ret) { |
|
dev_dbg(cw_bat->dev, "Using default poll interval\n"); |
|
cw_bat->poll_interval_ms = CW2015_DEFAULT_POLL_INTERVAL_MS; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct regmap_range regmap_ranges_rd_yes[] = { |
|
regmap_reg_range(CW2015_REG_VERSION, CW2015_REG_VERSION), |
|
regmap_reg_range(CW2015_REG_VCELL, CW2015_REG_CONFIG), |
|
regmap_reg_range(CW2015_REG_MODE, CW2015_REG_MODE), |
|
regmap_reg_range(CW2015_REG_BATINFO, |
|
CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1), |
|
}; |
|
|
|
static const struct regmap_access_table regmap_rd_table = { |
|
.yes_ranges = regmap_ranges_rd_yes, |
|
.n_yes_ranges = 4, |
|
}; |
|
|
|
static const struct regmap_range regmap_ranges_wr_yes[] = { |
|
regmap_reg_range(CW2015_REG_RRT_ALERT, CW2015_REG_CONFIG), |
|
regmap_reg_range(CW2015_REG_MODE, CW2015_REG_MODE), |
|
regmap_reg_range(CW2015_REG_BATINFO, |
|
CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1), |
|
}; |
|
|
|
static const struct regmap_access_table regmap_wr_table = { |
|
.yes_ranges = regmap_ranges_wr_yes, |
|
.n_yes_ranges = 3, |
|
}; |
|
|
|
static const struct regmap_range regmap_ranges_vol_yes[] = { |
|
regmap_reg_range(CW2015_REG_VCELL, CW2015_REG_SOC + 1), |
|
}; |
|
|
|
static const struct regmap_access_table regmap_vol_table = { |
|
.yes_ranges = regmap_ranges_vol_yes, |
|
.n_yes_ranges = 1, |
|
}; |
|
|
|
static const struct regmap_config cw2015_regmap_config = { |
|
.reg_bits = 8, |
|
.val_bits = 8, |
|
.rd_table = ®map_rd_table, |
|
.wr_table = ®map_wr_table, |
|
.volatile_table = ®map_vol_table, |
|
.max_register = CW2015_REG_BATINFO + CW2015_SIZE_BATINFO - 1, |
|
}; |
|
|
|
static int cw_bat_probe(struct i2c_client *client) |
|
{ |
|
int ret; |
|
struct cw_battery *cw_bat; |
|
struct power_supply_config psy_cfg = { 0 }; |
|
|
|
cw_bat = devm_kzalloc(&client->dev, sizeof(*cw_bat), GFP_KERNEL); |
|
if (!cw_bat) |
|
return -ENOMEM; |
|
|
|
i2c_set_clientdata(client, cw_bat); |
|
cw_bat->dev = &client->dev; |
|
cw_bat->soc = 1; |
|
|
|
ret = cw2015_parse_properties(cw_bat); |
|
if (ret) { |
|
dev_err(cw_bat->dev, "Failed to parse cw2015 properties\n"); |
|
return ret; |
|
} |
|
|
|
cw_bat->regmap = devm_regmap_init_i2c(client, &cw2015_regmap_config); |
|
if (IS_ERR(cw_bat->regmap)) { |
|
dev_err(cw_bat->dev, "Failed to allocate regmap: %ld\n", |
|
PTR_ERR(cw_bat->regmap)); |
|
return PTR_ERR(cw_bat->regmap); |
|
} |
|
|
|
ret = cw_init(cw_bat); |
|
if (ret) { |
|
dev_err(cw_bat->dev, "Init failed: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
psy_cfg.drv_data = cw_bat; |
|
psy_cfg.fwnode = dev_fwnode(cw_bat->dev); |
|
|
|
cw_bat->rk_bat = devm_power_supply_register(&client->dev, |
|
&cw2015_bat_desc, |
|
&psy_cfg); |
|
if (IS_ERR(cw_bat->rk_bat)) { |
|
dev_err(cw_bat->dev, "Failed to register power supply\n"); |
|
return PTR_ERR(cw_bat->rk_bat); |
|
} |
|
|
|
ret = power_supply_get_battery_info(cw_bat->rk_bat, &cw_bat->battery); |
|
if (ret) { |
|
dev_warn(cw_bat->dev, |
|
"No monitored battery, some properties will be missing\n"); |
|
} |
|
|
|
cw_bat->battery_workqueue = create_singlethread_workqueue("rk_battery"); |
|
INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work); |
|
queue_delayed_work(cw_bat->battery_workqueue, |
|
&cw_bat->battery_delay_work, msecs_to_jiffies(10)); |
|
return 0; |
|
} |
|
|
|
static int __maybe_unused cw_bat_suspend(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct cw_battery *cw_bat = i2c_get_clientdata(client); |
|
|
|
cancel_delayed_work_sync(&cw_bat->battery_delay_work); |
|
return 0; |
|
} |
|
|
|
static int __maybe_unused cw_bat_resume(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct cw_battery *cw_bat = i2c_get_clientdata(client); |
|
|
|
queue_delayed_work(cw_bat->battery_workqueue, |
|
&cw_bat->battery_delay_work, 0); |
|
return 0; |
|
} |
|
|
|
static SIMPLE_DEV_PM_OPS(cw_bat_pm_ops, cw_bat_suspend, cw_bat_resume); |
|
|
|
static int cw_bat_remove(struct i2c_client *client) |
|
{ |
|
struct cw_battery *cw_bat = i2c_get_clientdata(client); |
|
|
|
cancel_delayed_work_sync(&cw_bat->battery_delay_work); |
|
power_supply_put_battery_info(cw_bat->rk_bat, &cw_bat->battery); |
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id cw_bat_id_table[] = { |
|
{ "cw2015", 0 }, |
|
{ } |
|
}; |
|
|
|
static const struct of_device_id cw2015_of_match[] = { |
|
{ .compatible = "cellwise,cw2015" }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, cw2015_of_match); |
|
|
|
static struct i2c_driver cw_bat_driver = { |
|
.driver = { |
|
.name = "cw2015", |
|
.of_match_table = cw2015_of_match, |
|
.pm = &cw_bat_pm_ops, |
|
}, |
|
.probe_new = cw_bat_probe, |
|
.remove = cw_bat_remove, |
|
.id_table = cw_bat_id_table, |
|
}; |
|
|
|
module_i2c_driver(cw_bat_driver); |
|
|
|
MODULE_AUTHOR("xhc<[email protected]>"); |
|
MODULE_AUTHOR("Tobias Schramm <[email protected]>"); |
|
MODULE_DESCRIPTION("cw2015/cw2013 battery driver"); |
|
MODULE_LICENSE("GPL");
|
|
|