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[178.122.232.167]) by smtp.googlemail.com with ESMTPSA id 4fb4d7f45d1cf-57cb72da156sm7731278a12.22.2024.06.18.07.00.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Jun 2024 07:00:19 -0700 (PDT) From: Dzmitry Sankouski Date: Tue, 18 Jun 2024 16:59:48 +0300 Subject: [PATCH v3 14/23] power: supply: max77705: Add charger driver for Maxim 77705 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240618-starqltechn_integration_upstream-v3-14-e3f6662017ac@gmail.com> References: <20240618-starqltechn_integration_upstream-v3-0-e3f6662017ac@gmail.com> In-Reply-To: <20240618-starqltechn_integration_upstream-v3-0-e3f6662017ac@gmail.com> To: Sebastian Reichel , Bjorn Andersson , Michael Turquette , Stephen Boyd , Neil Armstrong , Jessica Zhang , Sam Ravnborg , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lee Jones , Dmitry Torokhov , Pavel Machek , Liam Girdwood , Mark Brown , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Krzysztof Kozlowski , Konrad Dybcio , Chanwoo Choi , phone-devel@vger.kernel.org Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-leds@vger.kernel.org, linux-pwm@vger.kernel.org, linux-samsung-soc@vger.kernel.org, Dzmitry Sankouski X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1718719185; l=34495; i=dsankouski@gmail.com; s=20240618; h=from:subject:message-id; bh=hKVjmHg9fPappw6Ge/EdwOBFJeuWIpNZ6cWmDemYKw8=; b=xfxQadM+f4Z/jGSyjeHbx9fCbIOIfVRWeUMeqh1I4IKNwLQMEIYvF/fRaLke7MY7m6tZWyLC2 d+pny78wduhDySBTNMcMO8qTJZwEYPVeMZvR8QkjYBQVAnu01+bjNvI X-Developer-Key: i=dsankouski@gmail.com; a=ed25519; pk=6pMMVVDDReSiRgPCbMOUauN5nS3ty4Sf5b7a2gi4x0M= Add driver for Maxim 77705 switch-mode charger (part of max77705 MFD driver) providing power supply class information to userspace. The driver is configured through DTS (battery and system related settings). Also, POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE property is writable, which allows to configure charge end at less than 100% Signed-off-by: Dzmitry Sankouski --- drivers/power/supply/Kconfig | 6 + drivers/power/supply/Makefile | 1 + drivers/power/supply/max77705_charger.c | 772 ++++++++++++++++++++++++++++++++ include/linux/mfd/max77705_charger.h | 225 ++++++++++ 4 files changed, 1004 insertions(+) diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 3e31375491d5..47ca8cc00a80 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -552,6 +552,12 @@ config CHARGER_MAX77693 help Say Y to enable support for the Maxim MAX77693 battery charger. +config CHARGER_MAX77705 + tristate "Maxim MAX77705 battery charger driver" + depends on MFD_MAX77705 + help + Say Y to enable support for the Maxim MAX77705 battery charger. + config CHARGER_MAX77976 tristate "Maxim MAX77976 battery charger driver" depends on I2C diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 58b567278034..dbec648c78c9 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_MAX77693) += max77693_charger.o +obj-$(CONFIG_CHARGER_MAX77705) += max77705_charger.o obj-$(CONFIG_CHARGER_MAX77976) += max77976_charger.o obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o diff --git a/drivers/power/supply/max77705_charger.c b/drivers/power/supply/max77705_charger.c new file mode 100644 index 000000000000..2b3e836d4c55 --- /dev/null +++ b/drivers/power/supply/max77705_charger.c @@ -0,0 +1,772 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * max77705_charger.c - Battery charger driver for the Maxim 77705 + * + * Copyright (C) 2014 Samsung Electronics + * Krzysztof Kozlowski + * Copyright (C) 2024 Dzmitry Sankouski + */ + +#include +#include +#include +#include +#include + +#include +#include +#include + +#define MAX77705_CHARGER_NAME "max77705-charger" +static const char *max77705_charger_model = "max77705"; +static const char *max77705_charger_manufacturer = "Maxim Integrated"; +static struct dentry *debugfs_file; + +static enum power_supply_property max77705_charger_props[] = { + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, + POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, +}; + +static int max77705_get_online(struct regmap *regmap, int *val) +{ + unsigned int data; + int ret; + + ret = regmap_read(regmap, MAX77705_CHG_REG_INT_OK, &data); + if (ret < 0) + return ret; + + *val = !!(data & MAX77705_CHGIN_OK); + + return 0; +} + +static int max77705_get_charger_state(struct max77705_charger_data *charger) +{ + struct regmap *regmap = charger->max77705->regmap_charger; + int status = POWER_SUPPLY_STATUS_UNKNOWN; + unsigned int reg_data; + + regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, ®_data); + + pr_debug("%s: charger status (0x%02x)\n", __func__, reg_data); + + reg_data &= 0x0f; + + switch (reg_data) { + case 0x0: + case MAX77705_CHARGER_CONSTANT_CURRENT: + case MAX77705_CHARGER_CONSTANT_VOLTAGE: + status = POWER_SUPPLY_STATUS_CHARGING; + break; + case MAX77705_CHARGER_END_OF_CHARGE: + case MAX77705_CHARGER_DONE: + status = POWER_SUPPLY_STATUS_FULL; + break; + case 0x05: + case 0x06: + case 0x07: + status = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + case 0x08: + case 0xA: + case 0xB: + status = POWER_SUPPLY_STATUS_DISCHARGING; + break; + default: + status = POWER_SUPPLY_STATUS_UNKNOWN; + break; + } + + return (int)status; +} + +static int max77705_get_battery_health(struct regmap *regmap, int *value) +{ + unsigned int bat_dtls; + + regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, &bat_dtls); + bat_dtls = ((bat_dtls & MAX77705_BAT_DTLS) >> MAX77705_BAT_DTLS_SHIFT); + + pr_debug("%s: bat_dtls(0x%x)\n", __func__, bat_dtls); + + switch (bat_dtls) { + case MAX77705_BATTERY_NOBAT: + pr_debug("%s: No battery and the charger is suspended\n", __func__); + *value = POWER_SUPPLY_HEALTH_NO_BATTERY; + break; + case MAX77705_BATTERY_PREQUALIFICATION: + pr_debug("%s: battery is okay but its voltage is low(~VPQLB)\n", __func__); + break; + case MAX77705_BATTERY_DEAD: + pr_debug("%s: battery dead\n", __func__); + *value = POWER_SUPPLY_HEALTH_DEAD; + break; + case MAX77705_BATTERY_GOOD: + case MAX77705_BATTERY_LOWVOLTAGE: + *value = POWER_SUPPLY_HEALTH_GOOD; + break; + case MAX77705_BATTERY_OVERVOLTAGE: + pr_debug("%s: battery ovp\n", __func__); + *value = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + break; + default: + pr_debug("%s: battery unknown\n", __func__); + *value = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; + break; + } + + return 0; +} + +static int max77705_get_vbus_state(struct regmap *regmap, int *value) +{ + int ret; + unsigned int charge_dtls; + + ret = regmap_read(regmap, MAX77705_CHG_REG_DETAILS_00, &charge_dtls); + if (ret) + return ret; + + charge_dtls = ((charge_dtls & MAX77705_CHGIN_DTLS) >> + MAX77705_CHGIN_DTLS_SHIFT); + + switch (charge_dtls) { + case 0x00: + *value = POWER_SUPPLY_HEALTH_UNDERVOLTAGE; + break; + case 0x01: + *value = POWER_SUPPLY_HEALTH_UNDERVOLTAGE; + break; + case 0x02: + *value = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + break; + case 0x03: + *value = POWER_SUPPLY_HEALTH_GOOD; + break; + default: + return 0; + } + return 0; +} + +static int max77705_get_health(struct regmap *regmap, int *value) +{ + int ret, is_online = 0; + + ret = max77705_get_online(regmap, &is_online); + if (ret) + return ret; + if (is_online) { + ret = max77705_get_vbus_state(regmap, value); + if (ret || (*value != POWER_SUPPLY_HEALTH_GOOD)) + return ret; + } + ret = max77705_get_battery_health(regmap, value); + if (ret) + return ret; + return ret; +} + +static int max77705_get_input_current(struct max77705_charger_data *charger) +{ + unsigned int reg_data; + int get_current = 0; + struct regmap *regmap = charger->max77705->regmap_charger; + + regmap_read(regmap, + MAX77705_CHG_REG_CNFG_09, ®_data); + /* AND operation for removing the formal 1bit */ + reg_data &= MAX77705_CHG_CHGIN_LIM_MASK; + + if (reg_data <= 0x3) + get_current = 100; + else if (reg_data >= 0x7F) + get_current = 3200; + else + get_current = (reg_data + 0x01) * 25; + + dev_dbg(charger->dev, "reg:(0x%x), charging_current:(%d)\n", + reg_data, get_current); + + return get_current; +} + +static void max77705_set_input_current(struct max77705_charger_data *charger, + int input_current) +{ + int curr_step = 25; + u8 set_reg, set_mask, reg_data = 0; + struct regmap *regmap = charger->max77705->regmap_charger; + + mutex_lock(&charger->charger_mutex); + + + set_reg = MAX77705_CHG_REG_CNFG_09; + set_mask = MAX77705_CHG_CHGIN_LIM_MASK; + + if (input_current < 100) { + reg_data = 0x00; + regmap_update_bits(regmap, set_reg, set_mask, reg_data); + } else { + input_current = (input_current > 3200) ? 3200 : input_current; + reg_data = (input_current / curr_step) - 0x01; + regmap_update_bits(regmap, set_reg, set_mask, reg_data); + } + + mutex_unlock(&charger->charger_mutex); + dev_dbg(charger->dev, "REG(0x%02x) DATA(0x%02x), CURRENT(%d)\n", + set_reg, reg_data, input_current); +} + +static int max77705_get_float_voltage(struct max77705_charger_data *charger) +{ + unsigned int reg_data = 0; + int float_voltage; + struct regmap *regmap = charger->max77705->regmap_charger; + + regmap_read(regmap, MAX77705_CHG_REG_CNFG_04, ®_data); + reg_data &= 0x3F; + float_voltage = reg_data <= 0x04 ? reg_data * 50 + 4000 : + (reg_data - 4) * 10 + 4200; + dev_dbg(charger->dev, "battery cv reg : 0x%x, float voltage val : %d\n", + reg_data, float_voltage); + + return float_voltage; +} + +static void max77705_set_float_voltage(struct max77705_charger_data *charger, + int float_voltage) +{ + int float_voltage_mv; + unsigned int reg_data = 0; + struct regmap *regmap = charger->max77705->regmap_charger; + + float_voltage_mv = float_voltage / 1000; + reg_data = float_voltage_mv <= 4000 ? 0x0 : + float_voltage_mv >= 4500 ? 0x23 : + (float_voltage_mv <= 4200) ? (float_voltage_mv - 4000) / 50 : + (((float_voltage_mv - 4200) / 10) + 0x04); + + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_04, + CHG_CNFG_04_CHG_CV_PRM_MASK, + (reg_data << CHG_CNFG_04_CHG_CV_PRM_SHIFT)); + + regmap_read(regmap, MAX77705_CHG_REG_CNFG_04, ®_data); + dev_dbg(charger->dev, "battery cv voltage 0x%x\n", reg_data); +} + +static bool max77705_check_battery(struct max77705_charger_data *charger) +{ + unsigned int reg_data; + unsigned int reg_data2; + struct regmap *regmap = charger->max77705->regmap_charger; + + + regmap_read(regmap, MAX77705_CHG_REG_INT_OK, ®_data); + + dev_dbg(charger->dev, "CHG_INT_OK(0x%x)\n", reg_data); + + regmap_read(regmap, + MAX77705_CHG_REG_DETAILS_00, ®_data2); + + dev_dbg(charger->dev, "CHG_DETAILS00(0x%x)\n", reg_data2); + + if ((reg_data & MAX77705_BATP_OK) || !(reg_data2 & MAX77705_BATP_DTLS)) + return true; + else + return false; +} + +static int max77705_get_charge_type(struct regmap *regmap, + union power_supply_propval *val) +{ + unsigned int reg_data; + + regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, ®_data); + reg_data &= 0x0F; + switch (reg_data) { + case MAX77705_CHARGER_CONSTANT_CURRENT: + val->strval = "CC Mode"; + break; + case MAX77705_CHARGER_CONSTANT_VOLTAGE: + val->strval = "CV Mode"; + break; + case MAX77705_CHARGER_END_OF_CHARGE: + val->strval = "EOC"; + break; + case MAX77705_CHARGER_DONE: + val->strval = "DONE"; + break; + default: + val->strval = "NONE"; + break; + } + + return 0; +} + +static int max77705_get_charge_current(struct max77705_charger_data *charger) +{ + unsigned int reg_data; + int get_current = 0; + struct regmap *regmap = charger->max77705->regmap_charger; + + + regmap_read(regmap, MAX77705_CHG_REG_CNFG_02, ®_data); + reg_data &= MAX77705_CHG_CC; + + get_current = reg_data <= 0x2 ? 100 : reg_data * 50; + + dev_dbg(charger->dev, "reg:(0x%x), charging_current:(%d)\n", + reg_data, get_current); + return get_current; +} + +static void max77705_set_charge_current(struct max77705_charger_data *charger, + int fast_charging_current) +{ + int curr_step = 50; + u8 set_mask, reg_data = 0; + struct regmap *regmap = charger->max77705->regmap_charger; + + set_mask = MAX77705_CHG_CC; + + if (fast_charging_current < 100) { + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_02, set_mask, 0x00); + } else { + fast_charging_current = + (fast_charging_current > 3150) ? 3150 : fast_charging_current; + + reg_data |= (fast_charging_current / curr_step); + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_02, set_mask, reg_data); + } + + dev_dbg(charger->dev, "REG(0x%02x) DATA(0x%02x), CURRENT(%d)\n", + MAX77705_CHG_REG_CNFG_02, + reg_data, fast_charging_current); +} + +static int max77705_chg_set_wdtmr_en(struct max77705_charger_data *charger, bool enable) +{ + dev_dbg(charger->dev, "WDT en = %d\n", enable); + struct regmap *regmap = charger->max77705->regmap_charger; + + if (enable) { + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00, + CHG_CNFG_00_WDTEN_MASK, CHG_CNFG_00_WDTEN_MASK); + } else { + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00, + CHG_CNFG_00_WDTEN_MASK, 0); + } + + return 0; +} + +static void max77705_charger_initialize(struct max77705_charger_data *charger) +{ + u8 reg_data; + struct power_supply_battery_info *info; + struct regmap *regmap = charger->max77705->regmap_charger; + + if (power_supply_get_battery_info(charger->psy_chg, &info) < 0) + return; + + charger->bat_info = info; + + /* unlock charger setting protect + * slowest LX slope + */ + reg_data = MAX77705_CHGPROT_MASK | MAX77705_SLOWEST_LX_SLOPE; + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_06, reg_data, + reg_data); + + /* + * fast charge timer disable + * restart threshold disable + * pre-qual charge disable + */ + reg_data = (MAX77705_FCHGTIME_DISABLE << CHG_CNFG_01_FCHGTIME_SHIFT) | + (MAX77705_CHG_RSTRT_DISABLE << CHG_CNFG_01_CHG_RSTRT_SHIFT) | + (MAX77705_CHG_PQEN_DISABLE << CHG_CNFG_01_PQEN_SHIFT); + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_01, + (CHG_CNFG_01_FCHGTIME_MASK | + CHG_CNFG_01_CHG_RSTRT_MASK | + CHG_CNFG_01_PQEN_MASK), + reg_data); + + /* + * OTG off(UNO on), boost off + */ + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00, + CHG_CNFG_00_OTG_CTRL, 0); + + /* + * charge current 450mA(default) + * otg current limit 900mA + */ + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_02, + CHG_CNFG_02_OTG_ILIM_MASK, + MAX77705_OTG_ILIM_900 << CHG_CNFG_02_OTG_ILIM_SHIFT); + + /* BAT to SYS OCP 4.80A */ + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_05, + CHG_CNFG_05_REG_B2SOVRC_MASK, + MAX77705_B2SOVRC_4_8A << CHG_CNFG_05_REG_B2SOVRC_SHIFT); + /* + * top off current 150mA + * top off timer 30min + */ + reg_data = (MAX77705_TO_ITH_150MA << CHG_CNFG_03_TO_ITH_SHIFT) | + (MAX77705_TO_TIME_30M << CHG_CNFG_03_TO_TIME_SHIFT) | + (MAX77705_SYS_TRACK_DISABLE << CHG_CNFG_03_SYS_TRACK_DIS_SHIFT); + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_03, + (CHG_CNFG_03_TO_ITH_MASK | + CHG_CNFG_03_TO_TIME_MASK | + CHG_CNFG_03_SYS_TRACK_DIS_MASK), reg_data); + + /* + * cv voltage 4.2V or 4.35V + * MINVSYS 3.6V(default) + */ + if (info->voltage_max_design_uv < 0) { + dev_warn(charger->dev, "missing battery:voltage-max-design-microvolt\n"); + max77705_set_float_voltage(charger, 4200000); + } else { + max77705_set_float_voltage(charger, info->voltage_max_design_uv); + } + + /* VCHGIN : REG=4.5V, UVLO=4.7V, WCHGIN : REG=4.5V, UVLO=4.7V */ + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12, + CHG_CNFG_12_VCHGIN_REG_MASK | CHG_CNFG_12_WCIN_REG_MASK, 0); + + /* Boost mode possible in FACTORY MODE */ + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_07, + CHG_CNFG_07_REG_FMBST_MASK, MAX77705_CHG_FMBST); + + /* Watchdog timer */ + max77705_chg_set_wdtmr_en(charger, 0); + + /* Active Discharge Enable */ + regmap_update_bits(regmap, MAX77705_PMIC_REG_MAINCTRL1, 1, 1); + + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_09, MAX77705_CHG_EN, MAX77705_CHG_EN); + + /* VBYPSET=5.0V */ + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_11, CHG_CNFG_11_VBYPSET_MASK, 0); + + /* Switching Frequency : 1.5MHz */ + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_08, CHG_CNFG_08_REG_FSW_MASK, + (MAX77705_CHG_FSW_1_5MHz << CHG_CNFG_08_REG_FSW_SHIFT)); + + /* Auto skip mode */ + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12, CHG_CNFG_12_REG_DISKIP_MASK, + (MAX77705_AUTO_SKIP << CHG_CNFG_12_REG_DISKIP_SHIFT)); +} + +static bool max77705_charger_unlock(struct max77705_charger_data *charger) +{ + unsigned int reg_data; + unsigned int chgprot; + int retry_cnt = 0; + bool need_init = false; + struct regmap *regmap = charger->max77705->regmap_charger; + + do { + regmap_read(regmap, MAX77705_CHG_REG_CNFG_06, + ®_data); + chgprot = (reg_data & MAX77705_CHGPROT_MASK); + if (chgprot != MAX77705_CHGPROT_UNLOCKED) { + dev_err(charger->dev, "unlock err, chgprot(0x%x), retry(%d)\n", + chgprot, retry_cnt); + regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_06, + MAX77705_CHGPROT_MASK, MAX77705_CHGPROT_MASK); + need_init = true; + msleep(20); + } else + break; + } while ((chgprot != MAX77705_CHGPROT_UNLOCKED) && (++retry_cnt < 10)); + + return need_init; +} + +static int max77705_prop_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + return (psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT) || + (psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN) || + (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) || + (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE); +} + +static int max77705_chg_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct max77705_charger_data *charger = power_supply_get_drvdata(psy); + + /* check unlock status before does set the register */ + max77705_charger_unlock(charger); + switch (psp) { + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + max77705_set_input_current(charger, val->intval); + break; + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + max77705_set_charge_current(charger, val->intval); + break; + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + if (val->intval > charger->bat_info->voltage_max_design_uv) { + dev_err(charger->dev, "%d voltage higher than max", + val->intval); + return -EINVAL; + } + max77705_set_float_voltage(charger, val->intval); + break; + default: + return -EINVAL; + } + return 0; +} + +static int max77705_chg_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + int ret = 0; + struct max77705_charger_data *charger = power_supply_get_drvdata(psy); + struct regmap *regmap = charger->max77705->regmap_charger; + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + max77705_get_online(regmap, &val->intval); + break; + case POWER_SUPPLY_PROP_PRESENT: + val->intval = max77705_check_battery(charger); + break; + case POWER_SUPPLY_PROP_STATUS: + val->intval = max77705_get_charger_state(charger); + break; + case POWER_SUPPLY_PROP_HEALTH: + ret = max77705_get_health(regmap, &val->intval); + break; + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: + val->intval = max77705_get_input_current(charger); + break; + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: + val->intval = max77705_get_charge_current(charger); + break; + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: + val->intval = max77705_get_float_voltage(charger); + break; + case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: + val->intval = charger->bat_info->voltage_max_design_uv; + break; + case POWER_SUPPLY_PROP_CHARGE_TYPE: + ret = max77705_get_charge_type(regmap, val); + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = max77705_charger_model; + break; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = max77705_charger_manufacturer; + break; + default: + return -EINVAL; + } + return ret; +} + +static void max77705_chgin_isr_work(struct work_struct *work) +{ + struct max77705_charger_data *charger = + container_of(work, struct max77705_charger_data, chgin_work); + regmap_update_bits(charger->max77705->regmap_charger, + MAX77705_CHG_REG_INT_MASK, + MAX77705_CHGIN_IM, MAX77705_CHGIN_IM); + power_supply_changed(charger->psy_chg); + regmap_update_bits(charger->max77705->regmap_charger, + MAX77705_CHG_REG_INT_MASK, + MAX77705_CHGIN_IM, 0); +} + +static irqreturn_t max77705_chgin_irq(int irq, void *data) +{ + struct max77705_charger_data *charger = data; + + queue_work(charger->wqueue, &charger->chgin_work); + + return IRQ_HANDLED; +} + +static int max77705_debugfs_show(struct seq_file *s, void *data) +{ + struct max77705_charger_data *charger = s->private; + struct regmap *regmap = charger->max77705->regmap_charger; + unsigned int reg, reg_data; + + seq_printf(s, "MAX77705 CHARGER IC, ver.0x%x\n", charger->pmic_ver); + seq_puts(s, "===================\n"); + for (reg = 0xB0; reg <= 0xC3; reg++) { + regmap_read(regmap, reg, ®_data); + seq_printf(s, "0x%02x:\t0x%02x\n", reg, reg_data); + } + + seq_puts(s, "\n"); + return 0; +} + +static int max77705_debugfs_open(struct inode *inode, struct file *file) +{ + return single_open(file, max77705_debugfs_show, inode->i_private); +} + +static const struct file_operations max77705_debugfs_fops = { + .open = max77705_debugfs_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static const struct power_supply_desc max77705_charger_power_supply_desc = { + .name = MAX77705_CHARGER_NAME, + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = max77705_charger_props, + .num_properties = ARRAY_SIZE(max77705_charger_props), + .get_property = max77705_chg_get_property, + .set_property = max77705_chg_set_property, + .property_is_writeable = max77705_prop_writeable, +}; + +static int max77705_charger_probe(struct platform_device *pdev) +{ + struct max77705_dev *max77705 = dev_get_drvdata(pdev->dev.parent); + struct max77705_platform_data *pdata = dev_get_platdata(max77705->dev); + struct max77705_charger_data *charger; + struct regmap *regmap = max77705->regmap_charger; + struct power_supply_config charger_cfg = { }; + int ret = 0; + unsigned int reg_data; + + charger = kzalloc(sizeof(*charger), GFP_KERNEL); + if (!charger) + return -ENOMEM; + + mutex_init(&charger->charger_mutex); + + charger->dev = &pdev->dev; + charger->max77705 = max77705; + charger->max77705_pdata = pdata; + + platform_set_drvdata(pdev, charger); + + regmap_read(regmap, MAX77705_CHG_REG_INT_OK, ®_data); + + if (regmap_read + (max77705->regmap, MAX77705_PMIC_REG_PMICREV, ®_data) < 0) { + dev_err(charger->dev, + "device not found on this channel (this is not an error)\n"); + ret = -ENOMEM; + } else { + charger->pmic_ver = (reg_data & 0x7); + dev_dbg(charger->dev, "device found : ver.0x%x\n", charger->pmic_ver); + } + + debugfs_file = debugfs_create_file("max77705-charger-regs", + 0664, NULL, (void *)charger, + &max77705_debugfs_fops); + if (!debugfs_file) + dev_err(charger->dev, "Failed to create debugfs file\n"); + + charger_cfg.drv_data = charger; + charger_cfg.of_node = charger->dev->of_node; + + charger->psy_chg = + devm_power_supply_register(&pdev->dev, + &max77705_charger_power_supply_desc, + &charger_cfg); + if (IS_ERR(charger->psy_chg)) { + dev_err(charger->dev, "Failed to Register psy_chg\n"); + goto err_free; + } + + max77705_charger_initialize(charger); + + charger->wqueue = create_singlethread_workqueue(dev_name(&pdev->dev)); + if (!charger->wqueue) { + pr_err("%s: Fail to Create Workqueue\n", __func__); + goto err_free; + } + INIT_WORK(&charger->chgin_work, max77705_chgin_isr_work); + + charger->irq_chgin = max77705->irq_base + MAX77705_CHG_IRQ_CHGIN_I; + ret = devm_request_threaded_irq(charger->dev, charger->irq_chgin, NULL, + max77705_chgin_irq, 0, "chgin-irq", charger); + if (ret < 0) { + pr_err("%s: fail to request chgin IRQ: %d: %d\n", + __func__, charger->irq_chgin, ret); + } else { + max77705_irq_unmask_subdevice(max77705, MAX77705_IRQSRC_CHG); + } + + return 0; + +err_free: + kfree(charger); + + return ret; +} + +static void max77705_charger_remove(struct platform_device *pdev) +{ + struct max77705_charger_data *charger = platform_get_drvdata(pdev); + struct regmap *regmap = charger->max77705->regmap_charger; + + max77705_irq_mask_subdevice(charger->max77705, MAX77705_IRQSRC_CHG); + + if (regmap) { + u8 reg_data; + + reg_data = CHG_CNFG_00_BUCK_MASK; + regmap_write(regmap, MAX77705_CHG_REG_CNFG_00, reg_data); + reg_data = max77705_convert_ma_to_chgin_ilim_value(500); + regmap_write(regmap, MAX77705_CHG_REG_CNFG_09, reg_data); + reg_data = max77705_convert_ma_to_wcin_ilim_value(320); + regmap_write(regmap, MAX77705_CHG_REG_CNFG_10, reg_data); + reg_data = CHG_CNFG_12_CHGINSEL_MASK | CHG_CNFG_12_WCINSEL_MASK; + regmap_write(regmap, MAX77705_CHG_REG_CNFG_12, reg_data); + } else { + dev_err(charger->dev, "no max77705 i2c client\n"); + } + + if (debugfs_file) + debugfs_remove(debugfs_file); + + kfree(charger); +} + +static const struct platform_device_id max77705_charger_id[] = { + { "max77705-charger", 0, }, + { } +}; +MODULE_DEVICE_TABLE(platform, max77705_charger_id); + +static struct platform_driver max77705_charger_driver = { + .driver = { + .name = "max77705-charger", + }, + .probe = max77705_charger_probe, + .remove_new = max77705_charger_remove, + .id_table = max77705_charger_id, +}; +module_platform_driver(max77705_charger_driver); + +MODULE_AUTHOR("Dzmitry Sankouski "); +MODULE_DESCRIPTION("Maxim 77705 charger driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/max77705_charger.h b/include/linux/mfd/max77705_charger.h new file mode 100644 index 000000000000..816bb63d9583 --- /dev/null +++ b/include/linux/mfd/max77705_charger.h @@ -0,0 +1,225 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * max77705_charger.h + * Samsung max77705 Charger Header + * + * Copyright (C) 2015 Samsung Electronics, Inc. + * + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#ifndef __MAX77705_CHARGER_H +#define __MAX77705_CHARGER_H __FILE__ + +#include +#include +#include +#include + +/* MAX77705_CHG_REG_CHG_INT */ +#define MAX77705_BYP_I BIT(0) +#define MAX77705_INP_LIMIT_I BIT(1) +#define MAX77705_BATP_I BIT(2) +#define MAX77705_BAT_I BIT(3) +#define MAX77705_CHG_I BIT(4) +#define MAX77705_WCIN_I BIT(5) +#define MAX77705_CHGIN_I BIT(6) +#define MAX77705_AICL_I BIT(7) + +/* MAX77705_CHG_REG_CHG_INT_MASK */ +#define MAX77705_BYP_IM BIT(0) +#define MAX77705_INP_LIMIT_IM BIT(1) +#define MAX77705_BATP_IM BIT(2) +#define MAX77705_BAT_IM BIT(3) +#define MAX77705_CHG_IM BIT(4) +#define MAX77705_WCIN_IM BIT(5) +#define MAX77705_CHGIN_IM BIT(6) +#define MAX77705_AICL_IM BIT(7) + +/* MAX77705_CHG_REG_CHG_INT_OK */ +#define MAX77705_BYP_OK BIT(0) +#define MAX77705_DISQBAT_OK BIT(1) +#define MAX77705_BATP_OK BIT(2) +#define MAX77705_BAT_OK BIT(3) +#define MAX77705_CHG_OK BIT(4) +#define MAX77705_WCIN_OK BIT(5) +#define MAX77705_CHGIN_OK BIT(6) +#define MAX77705_AICL_OK BIT(7) + +/* MAX77705_CHG_REG_CHG_DTLS_00 */ +#define MAX77705_BATP_DTLS BIT(0) +#define MAX77705_WCIN_DTLS (BIT(3) | BIT(4)) +#define MAX77705_WCIN_DTLS_SHIFT 3 +#define MAX77705_CHGIN_DTLS (BIT(5) | BIT(6)) +#define MAX77705_CHGIN_DTLS_SHIFT 5 + +/* MAX77705_CHG_REG_CHG_DTLS_01 */ +#define MAX77705_CHG_DTLS (BIT(0) | BIT(1) | BIT(2) | BIT(3)) +#define MAX77705_CHG_DTLS_SHIFT 0 +#define MAX77705_BAT_DTLS (BIT(4) | BIT(5) | BIT(6)) +#define MAX77705_BAT_DTLS_SHIFT 4 + +/* MAX77705_CHG_REG_CHG_DTLS_02 */ +#define MAX77705_BYP_DTLS (BIT(0) | BIT(1) | BIT(2) | BIT(3)) +#define MAX77705_BYP_DTLS_SHIFT 0 + +/* MAX77705_CHG_REG_CHG_CNFG_00 */ +#define CHG_CNFG_00_MODE_SHIFT 0 +#define CHG_CNFG_00_CHG_SHIFT 0 +#define CHG_CNFG_00_UNO_SHIFT 1 +#define CHG_CNFG_00_OTG_SHIFT 1 +#define CHG_CNFG_00_BUCK_SHIFT 2 +#define CHG_CNFG_00_BOOST_SHIFT 3 +#define CHG_CNFG_00_WDTEN_SHIFT 4 +#define CHG_CNFG_00_MODE_MASK (0x0F << CHG_CNFG_00_MODE_SHIFT) +#define CHG_CNFG_00_CHG_MASK BIT(CHG_CNFG_00_CHG_SHIFT) +#define CHG_CNFG_00_UNO_MASK BIT(CHG_CNFG_00_UNO_SHIFT) +#define CHG_CNFG_00_OTG_MASK BIT(CHG_CNFG_00_OTG_SHIFT) +#define CHG_CNFG_00_BUCK_MASK BIT(CHG_CNFG_00_BUCK_SHIFT) +#define CHG_CNFG_00_BOOST_MASK BIT(CHG_CNFG_00_BOOST_SHIFT) +#define CHG_CNFG_00_WDTEN_MASK BIT(CHG_CNFG_00_WDTEN_SHIFT) +#define CHG_CNFG_00_UNO_CTRL (CHG_CNFG_00_UNO_MASK | CHG_CNFG_00_BOOST_MASK) +#define CHG_CNFG_00_OTG_CTRL (CHG_CNFG_00_OTG_MASK | CHG_CNFG_00_BOOST_MASK) + +/* MAX77705_CHG_REG_CHG_CNFG_01 */ +#define CHG_CNFG_01_FCHGTIME_SHIFT 0 +#define CHG_CNFG_01_FCHGTIME_MASK (0x7 << CHG_CNFG_01_FCHGTIME_SHIFT) +#define MAX77705_FCHGTIME_DISABLE 0x0 + +#define CHG_CNFG_01_CHG_RSTRT_SHIFT 4 +#define CHG_CNFG_01_CHG_RSTRT_MASK (0x3 << CHG_CNFG_01_CHG_RSTRT_SHIFT) +#define MAX77705_CHG_RSTRT_DISABLE 0x3 + +#define CHG_CNFG_01_PQEN_SHIFT 7 +#define CHG_CNFG_01_PQEN_MASK (0x1 << CHG_CNFG_01_PQEN_SHIFT) +#define MAX77705_CHG_PQEN_DISABLE 0x0 +#define MAX77705_CHG_PQEN_ENABLE 0x1 + +/* MAX77705_CHG_REG_CHG_CNFG_02 */ +#define CHG_CNFG_02_OTG_ILIM_SHIFT 6 +#define CHG_CNFG_02_OTG_ILIM_MASK (0x3 << CHG_CNFG_02_OTG_ILIM_SHIFT) +#define MAX77705_OTG_ILIM_500 0x0 +#define MAX77705_OTG_ILIM_900 0x1 +#define MAX77705_OTG_ILIM_1200 0x2 +#define MAX77705_OTG_ILIM_1500 0x3 +#define MAX77705_CHG_CC 0x3F + +/* MAX77705_CHG_REG_CHG_CNFG_03 */ +#define CHG_CNFG_03_TO_ITH_SHIFT 0 +#define CHG_CNFG_03_TO_ITH_MASK (0x7 << CHG_CNFG_03_TO_ITH_SHIFT) +#define MAX77705_TO_ITH_150MA 0x0 + +#define CHG_CNFG_03_TO_TIME_SHIFT 3 +#define CHG_CNFG_03_TO_TIME_MASK (0x7 << CHG_CNFG_03_TO_TIME_SHIFT) +#define MAX77705_TO_TIME_30M 0x3 + +#define CHG_CNFG_03_SYS_TRACK_DIS_SHIFT 7 +#define CHG_CNFG_03_SYS_TRACK_DIS_MASK (0x1 << CHG_CNFG_03_SYS_TRACK_DIS_SHIFT) +#define MAX77705_SYS_TRACK_ENABLE 0x0 +#define MAX77705_SYS_TRACK_DISABLE 0x1 + +/* MAX77705_CHG_REG_CHG_CNFG_04 */ +#define MAX77705_CHG_MINVSYS_MASK 0xC0 +#define MAX77705_CHG_MINVSYS_SHIFT 6 +#define MAX77705_CHG_PRM_MASK 0x1F +#define MAX77705_CHG_PRM_SHIFT 0 + +#define CHG_CNFG_04_CHG_CV_PRM_SHIFT 0 +#define CHG_CNFG_04_CHG_CV_PRM_MASK (0x3F << CHG_CNFG_04_CHG_CV_PRM_SHIFT) + +/* MAX77705_CHG_REG_CHG_CNFG_05 */ +#define CHG_CNFG_05_REG_B2SOVRC_SHIFT 0 +#define CHG_CNFG_05_REG_B2SOVRC_MASK (0xF << CHG_CNFG_05_REG_B2SOVRC_SHIFT) +#define MAX77705_B2SOVRC_DISABLE 0x0 +#define MAX77705_B2SOVRC_4_5A 0x6 +#define MAX77705_B2SOVRC_4_8A 0x8 +#define MAX77705_B2SOVRC_5_0A 0x9 + +/* MAX77705_CHG_CNFG_06 */ +#define CHG_CNFG_01_WDTCLR_SHIFT 0 +#define CHG_CNFG_01_WDTCLR_MASK (0x3 << CHG_CNFG_01_WDTCLR_SHIFT) +#define MAX77705_WDTCLR 0x01 +#define MAX77705_CHGPROT_MASK (BIT(2) | BIT(3)) +#define MAX77705_CHGPROT_UNLOCKED (BIT(2) | BIT(3)) +#define MAX77705_SLOWEST_LX_SLOPE (BIT(5) | BIT(6)) + +/* MAX77705_CHG_REG_CHG_CNFG_07 */ +#define MAX77705_CHG_FMBST 0x04 +#define CHG_CNFG_07_REG_FMBST_SHIFT 2 +#define CHG_CNFG_07_REG_FMBST_MASK (0x1 << CHG_CNFG_07_REG_FMBST_SHIFT) +#define CHG_CNFG_07_REG_FGSRC_SHIFT 1 +#define CHG_CNFG_07_REG_FGSRC_MASK (0x1 << CHG_CNFG_07_REG_FGSRC_SHIFT) + +/* MAX77705_CHG_REG_CHG_CNFG_08 */ +#define CHG_CNFG_08_REG_FSW_SHIFT 0 +#define CHG_CNFG_08_REG_FSW_MASK (0x3 << CHG_CNFG_08_REG_FSW_SHIFT) +#define MAX77705_CHG_FSW_3MHz 0x00 +#define MAX77705_CHG_FSW_2MHz 0x01 +#define MAX77705_CHG_FSW_1_5MHz 0x02 + +/* MAX77705_CHG_REG_CHG_CNFG_09 */ +#define MAX77705_CHG_CHGIN_LIM_MASK 0x7F +#define MAX77705_CHG_EN 0x80 + +/* MAX77705_CHG_REG_CHG_CNFG_10 */ +#define MAX77705_CHG_WCIN_LIM 0x3F + +/* MAX77705_CHG_REG_CHG_CNFG_11 */ +#define CHG_CNFG_11_VBYPSET_SHIFT 0 +#define CHG_CNFG_11_VBYPSET_MASK (0x7F << CHG_CNFG_11_VBYPSET_SHIFT) + +/* MAX77705_CHG_REG_CHG_CNFG_12 */ +#define CHG_CNFG_12_CHGINSEL_SHIFT 5 +#define MAX77705_CHG_WCINSEL BIT(CHG_CNFG_12_CHGINSEL_SHIFT) +#define CHG_CNFG_12_CHGINSEL_MASK BIT(CHG_CNFG_12_CHGINSEL_SHIFT) +#define CHG_CNFG_12_WCINSEL_SHIFT 6 +#define CHG_CNFG_12_WCINSEL_MASK BIT(CHG_CNFG_12_WCINSEL_SHIFT) +#define CHG_CNFG_12_VCHGIN_REG_MASK (0x3 << 3) +#define CHG_CNFG_12_WCIN_REG_MASK (0x3 << 1) +#define CHG_CNFG_12_REG_DISKIP_SHIFT 0 +#define CHG_CNFG_12_REG_DISKIP_MASK (0x1 << CHG_CNFG_12_REG_DISKIP_SHIFT) +#define MAX77705_DISABLE_SKIP 0x1 +#define MAX77705_AUTO_SKIP 0x0 + +/* Convert current in mA to corresponding CNFG09 value */ +inline u8 max77705_convert_ma_to_chgin_ilim_value(int cur) +{ + if (unlikely(cur < 0 && cur > 4000)) + return 0; + return (((cur - 100) / 33) + 3); +} + +/* Convert current in mA to corresponding CNFG10 value */ +inline u8 max77705_convert_ma_to_wcin_ilim_value(int cur) +{ + if (unlikely(cur < 0 && cur > 4000)) + return 0; + return (((cur - 60) / 20) + 3); +} + +struct max77705_charger_data { + struct device *dev; + struct mutex charger_mutex; + + struct max77705_platform_data *max77705_pdata; + struct max77705_dev *max77705; + struct power_supply_battery_info *bat_info; + struct workqueue_struct *wqueue; + struct work_struct chgin_work; + int irq_chgin; + + struct power_supply *psy_chg; + + int pmic_ver; +}; + +#endif /* __MAX77705_CHARGER_H */