From patchwork Wed Jun 11 20:03:02 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Samuel Kayode via B4 Relay X-Patchwork-Id: 895630 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B3CB02BDC2C; Wed, 11 Jun 2025 20:03:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749672180; cv=none; b=HfxHFG8k2bVu9nF0kNontFHeBGAvllT61YHtt+xytUOfpx4B+Z2Y1XeAd+SxWqHr0yMkcwTXB/L7l+LPAPYAr9Sw6tcwc0zwA0cvBZg421xIsu3EB4uoDryRrle8O5pmCw9WAxkBQFcaH9len0sqm/C9g/OVEixGu+C9fSaCxG8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749672180; c=relaxed/simple; bh=r1nA62oWz+N6EEjGQzdjzsY2XJHCXjKbLuEGLust5tc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=fv+KFNkpHumZkjOgjW+SQEI3n0+tEMXpV4+jLLj2x7KDANFPrKkVNonRpheoDQfDSbdScpS/QUeS6CgkT9mnHAZ5bUkfN2tvhlHZT/WtfIDbV4JGkul1c099Q8j7LH/p3rjP1Yd7YJkwFeNGmAV4epsJ+Ylte3xqacGJYulD9b0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=INFLDrn5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="INFLDrn5" Received: by smtp.kernel.org (Postfix) with ESMTPS id 4DB0EC4CEF2; Wed, 11 Jun 2025 20:03:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1749672180; bh=r1nA62oWz+N6EEjGQzdjzsY2XJHCXjKbLuEGLust5tc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=INFLDrn5TJUl72n33htX/oQd1U64X/hd1BHiUCD5TxYpmPxSwMsv8FM0pWCGkD7Fi c4ZmSxcgtrsaFD1zhk36ajszYgFXqIc0Q+zWBwvbBX5eeVcwce7KAUr96ez4diooZj fM7X4HnltPc7Az+n8qNV+JycwJ71bydQvOzvDdamK7fv99cTRoFPrQMxm/izTumavM MgivS8eam1n/Bh6pmbRm7xLni0aRn4duadEpoyt9TSKgODwbBMDZd/MyadgOGWuIay HqKY+XtTo5MF4uO+F+7X4KTuQ5NK+asQ7czN3gAkOWajrtX+5ZH1YgXvPCDAI7TRaH 9HA9zf4FnmqfA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3EBBBC71135; Wed, 11 Jun 2025 20:03:00 +0000 (UTC) From: Samuel Kayode via B4 Relay Date: Wed, 11 Jun 2025 16:03:02 -0400 Subject: [PATCH v6 5/6] power: supply: pf1550: add battery charger support Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250611-pf1550-v6-5-34f2ddfe045e@savoirfairelinux.com> References: <20250611-pf1550-v6-0-34f2ddfe045e@savoirfairelinux.com> In-Reply-To: <20250611-pf1550-v6-0-34f2ddfe045e@savoirfairelinux.com> To: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Liam Girdwood , Mark Brown , Dmitry Torokhov , Sebastian Reichel , Frank Li Cc: imx@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, linux-pm@vger.kernel.org, Abel Vesa , Abel Vesa , Robin Gong , Robin Gong , Enric Balletbo i Serra , Samuel Kayode , Abel Vesa X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1749672178; l=19867; i=samuel.kayode@savoirfairelinux.com; s=20250527; h=from:subject:message-id; bh=4yYkIju5/6JTtXKzI0l2ngqVA1Sk+NA/4Cea/1m4Wjs=; b=EHb6XE+ong5mIeFLOGnStKre/zkjY6RvPo/x5QhJMGM2QgRcBrG7MK9tqcuF0ba396Y55fokZ DGn/SRN4Th6AxylpKD9R9MjBK7M1590Sx1csTPvlfrpliMzeFXfk0Fg X-Developer-Key: i=samuel.kayode@savoirfairelinux.com; a=ed25519; pk=TPSQGQ5kywnnPyGs0EQqLajLFbdDu17ahXz8/gxMfio= X-Endpoint-Received: by B4 Relay for samuel.kayode@savoirfairelinux.com/20250527 with auth_id=412 X-Original-From: Samuel Kayode Reply-To: samuel.kayode@savoirfairelinux.com From: Samuel Kayode Add support for the battery charger for pf1550 PMIC. Signed-off-by: Samuel Kayode --- v6: - Drop lock entirely - Reverse christmas tree order for variables defined in probe as suggested by Frank - return pf1550_reg_init v5: - Drop lock for battery and charger delayed_work - More conservative locking in vbus delayed_work - Apply lock when setting power supply type during register initialization v4: - Finish handling of some interrupts in threaded irq handler - Use platform_get_irq v3: - Use struct power_supply_get_battery_info to get constant charge voltage if specified - Use virqs mapped in MFD driver v2: - Address feedback from Enric Balletbo Serra --- drivers/power/supply/Kconfig | 11 + drivers/power/supply/Makefile | 1 + drivers/power/supply/pf1550-charger.c | 633 ++++++++++++++++++++++++++++++++++ 3 files changed, 645 insertions(+) diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 79ddb006e2dad6bf96b71ed570a37c006b5f9433..6d0c872edac1f45da314632e671af1aeda4c87b8 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -471,6 +471,17 @@ config CHARGER_88PM860X help Say Y here to enable charger for Marvell 88PM860x chip. +config CHARGER_PF1550 + tristate "NXP PF1550 battery charger driver" + depends on MFD_PF1550 + help + Say Y to enable support for the NXP PF1550 battery charger. + The device is a single cell Li-Ion/Li-Polymer battery charger for + portable application. + + This driver can also be built as a module. If so, the module will be + called pf1550-charger. + config BATTERY_RX51 tristate "Nokia RX-51 (N900) battery driver" depends on TWL4030_MADC diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 4f5f8e3507f80da02812f0d08c2d81ddff0a272f..7f68380099c59dab71b73120150612a23e16a745 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -64,6 +64,7 @@ obj-$(CONFIG_CHARGER_RT9467) += rt9467-charger.o obj-$(CONFIG_CHARGER_RT9471) += rt9471.o obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o obj-$(CONFIG_CHARGER_88PM860X) += 88pm860x_charger.o +obj-$(CONFIG_CHARGER_PF1550) += pf1550-charger.o obj-$(CONFIG_BATTERY_RX51) += rx51_battery.o obj-$(CONFIG_AB8500_BM) += ab8500_bmdata.o ab8500_charger.o ab8500_fg.o ab8500_btemp.o ab8500_chargalg.o obj-$(CONFIG_CHARGER_CPCAP) += cpcap-charger.o diff --git a/drivers/power/supply/pf1550-charger.c b/drivers/power/supply/pf1550-charger.c new file mode 100644 index 0000000000000000000000000000000000000000..3b4cdf4cab9659005f86ffb32e8457c7cb3065f9 --- /dev/null +++ b/drivers/power/supply/pf1550-charger.c @@ -0,0 +1,633 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// pf1550_charger.c - charger driver for the PF1550 +// +// Copyright (C) 2016 Freescale Semiconductor, Inc. +// Robin Gong +// +// Portions Copyright (c) 2025 Savoir-faire Linux Inc. +// Samuel Kayode +// + +#include +#include +#include +#include +#include + +#define PF1550_CHARGER_NAME "pf1550-charger" +#define PF1550_DEFAULT_CONSTANT_VOLT 4200000 +#define PF1550_DEFAULT_MIN_SYSTEM_VOLT 3500000 +#define PF1550_DEFAULT_THERMAL_TEMP 75 +#define PF1550_CHARGER_IRQ_NR 5 + +static const char *pf1550_charger_model = "PF1550"; +static const char *pf1550_charger_manufacturer = "NXP"; + +struct pf1550_charger { + struct device *dev; + const struct pf1550_dev *pf1550; + struct power_supply *charger; + struct power_supply_desc psy_desc; + struct delayed_work vbus_sense_work; + struct delayed_work chg_sense_work; + struct delayed_work bat_sense_work; + + u32 constant_volt; + u32 min_system_volt; + u32 thermal_regulation_temp; +}; + +static int pf1550_get_charger_state(struct regmap *regmap, int *val) +{ + int ret; + unsigned int data; + + ret = regmap_read(regmap, PF1550_CHARG_REG_CHG_SNS, &data); + if (ret < 0) + return ret; + + data &= PF1550_CHG_SNS_MASK; + + switch (data) { + case PF1550_CHG_PRECHARGE: + case PF1550_CHG_CONSTANT_CURRENT: + *val = POWER_SUPPLY_STATUS_CHARGING; + break; + case PF1550_CHG_CONSTANT_VOL: + *val = POWER_SUPPLY_STATUS_CHARGING; + break; + case PF1550_CHG_EOC: + *val = POWER_SUPPLY_STATUS_CHARGING; + break; + case PF1550_CHG_DONE: + *val = POWER_SUPPLY_STATUS_FULL; + break; + case PF1550_CHG_TIMER_FAULT: + case PF1550_CHG_SUSPEND: + *val = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + case PF1550_CHG_OFF_INV: + case PF1550_CHG_OFF_TEMP: + case PF1550_CHG_LINEAR_ONLY: + *val = POWER_SUPPLY_STATUS_DISCHARGING; + break; + default: + *val = POWER_SUPPLY_STATUS_UNKNOWN; + } + + return 0; +} + +static int pf1550_get_charge_type(struct regmap *regmap, int *val) +{ + int ret; + unsigned int data; + + ret = regmap_read(regmap, PF1550_CHARG_REG_CHG_SNS, &data); + if (ret < 0) + return ret; + + data &= PF1550_CHG_SNS_MASK; + + switch (data) { + case PF1550_CHG_SNS_MASK: + *val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; + break; + case PF1550_CHG_CONSTANT_CURRENT: + case PF1550_CHG_CONSTANT_VOL: + case PF1550_CHG_EOC: + *val = POWER_SUPPLY_CHARGE_TYPE_FAST; + break; + case PF1550_CHG_DONE: + case PF1550_CHG_TIMER_FAULT: + case PF1550_CHG_SUSPEND: + case PF1550_CHG_OFF_INV: + case PF1550_CHG_BAT_OVER: + case PF1550_CHG_OFF_TEMP: + case PF1550_CHG_LINEAR_ONLY: + *val = POWER_SUPPLY_CHARGE_TYPE_NONE; + break; + default: + *val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN; + } + + return 0; +} + +/* + * Supported health statuses: + * - POWER_SUPPLY_HEALTH_DEAD + * - POWER_SUPPLY_HEALTH_GOOD + * - POWER_SUPPLY_HEALTH_OVERVOLTAGE + * - POWER_SUPPLY_HEALTH_UNKNOWN + */ +static int pf1550_get_battery_health(struct regmap *regmap, int *val) +{ + int ret; + unsigned int data; + + ret = regmap_read(regmap, PF1550_CHARG_REG_BATT_SNS, &data); + if (ret < 0) + return ret; + + data &= PF1550_BAT_SNS_MASK; + + switch (data) { + case PF1550_BAT_NO_DETECT: + *val = POWER_SUPPLY_HEALTH_DEAD; + break; + case PF1550_BAT_NO_VBUS: + case PF1550_BAT_LOW_THAN_PRECHARG: + case PF1550_BAT_CHARG_FAIL: + case PF1550_BAT_HIGH_THAN_PRECHARG: + *val = POWER_SUPPLY_HEALTH_GOOD; + break; + case PF1550_BAT_OVER_VOL: + *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + break; + default: + *val = POWER_SUPPLY_HEALTH_UNKNOWN; + break; + } + + return 0; +} + +static int pf1550_get_present(struct regmap *regmap, int *val) +{ + unsigned int data; + int ret; + + ret = regmap_read(regmap, PF1550_CHARG_REG_BATT_SNS, &data); + if (ret < 0) + return ret; + + data &= PF1550_BAT_SNS_MASK; + *val = (data == PF1550_BAT_NO_DETECT) ? 0 : 1; + + return 0; +} + +static int pf1550_get_online(struct regmap *regmap, int *val) +{ + unsigned int data; + int ret; + + ret = regmap_read(regmap, PF1550_CHARG_REG_VBUS_SNS, &data); + if (ret < 0) + return ret; + + *val = (data & PF1550_VBUS_VALID) ? 1 : 0; + + return 0; +} + +static void pf1550_chg_bat_work(struct work_struct *work) +{ + struct pf1550_charger *chg = container_of(to_delayed_work(work), + struct pf1550_charger, + bat_sense_work); + unsigned int data; + + if (!chg->charger) + return; + + if (regmap_read(chg->pf1550->regmap, PF1550_CHARG_REG_BATT_SNS, &data)) { + dev_err(chg->dev, "Read BATT_SNS error.\n"); + return; + } + + switch (data & PF1550_BAT_SNS_MASK) { + case PF1550_BAT_NO_VBUS: + dev_dbg(chg->dev, "No valid VBUS input.\n"); + break; + case PF1550_BAT_LOW_THAN_PRECHARG: + dev_dbg(chg->dev, "VBAT < VPRECHG.LB.\n"); + break; + case PF1550_BAT_CHARG_FAIL: + dev_dbg(chg->dev, "Battery charging failed.\n"); + break; + case PF1550_BAT_HIGH_THAN_PRECHARG: + dev_dbg(chg->dev, "VBAT > VPRECHG.LB.\n"); + break; + case PF1550_BAT_OVER_VOL: + dev_dbg(chg->dev, "VBAT > VBATOV.\n"); + break; + case PF1550_BAT_NO_DETECT: + dev_dbg(chg->dev, "Battery not detected.\n"); + break; + default: + dev_err(chg->dev, "Unknown value read:%x\n", + data & PF1550_CHG_SNS_MASK); + } +} + +static void pf1550_chg_chg_work(struct work_struct *work) +{ + struct pf1550_charger *chg = container_of(to_delayed_work(work), + struct pf1550_charger, + chg_sense_work); + unsigned int data; + + if (!chg->charger) + return; + + if (regmap_read(chg->pf1550->regmap, PF1550_CHARG_REG_CHG_SNS, &data)) { + dev_err(chg->dev, "Read CHG_SNS error.\n"); + return; + } + + switch (data & PF1550_CHG_SNS_MASK) { + case PF1550_CHG_PRECHARGE: + dev_dbg(chg->dev, "In pre-charger mode.\n"); + break; + case PF1550_CHG_CONSTANT_CURRENT: + dev_dbg(chg->dev, "In fast-charge constant current mode.\n"); + break; + case PF1550_CHG_CONSTANT_VOL: + dev_dbg(chg->dev, "In fast-charge constant voltage mode.\n"); + break; + case PF1550_CHG_EOC: + dev_dbg(chg->dev, "In EOC mode.\n"); + break; + case PF1550_CHG_DONE: + dev_dbg(chg->dev, "In DONE mode.\n"); + break; + case PF1550_CHG_TIMER_FAULT: + dev_info(chg->dev, "In timer fault mode.\n"); + break; + case PF1550_CHG_SUSPEND: + dev_info(chg->dev, "In thermistor suspend mode.\n"); + break; + case PF1550_CHG_OFF_INV: + dev_info(chg->dev, "Input invalid, charger off.\n"); + break; + case PF1550_CHG_BAT_OVER: + dev_info(chg->dev, "Battery over-voltage.\n"); + break; + case PF1550_CHG_OFF_TEMP: + dev_info(chg->dev, "Temp high, charger off.\n"); + break; + case PF1550_CHG_LINEAR_ONLY: + dev_dbg(chg->dev, "In Linear mode, not charging.\n"); + break; + default: + dev_err(chg->dev, "Unknown value read:%x\n", + data & PF1550_CHG_SNS_MASK); + } +} + +static void pf1550_chg_vbus_work(struct work_struct *work) +{ + struct pf1550_charger *chg = container_of(to_delayed_work(work), + struct pf1550_charger, + vbus_sense_work); + unsigned int data; + bool psy_changed = false; + + if (!chg->charger) + return; + + if (regmap_read(chg->pf1550->regmap, PF1550_CHARG_REG_VBUS_SNS, &data)) { + dev_err(chg->dev, "Read VBUS_SNS error.\n"); + return; + } + + if (data & PF1550_VBUS_UVLO) { + chg->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY; + psy_changed = true; + dev_dbg(chg->dev, "VBUS detached.\n"); + } + if (data & PF1550_VBUS_IN2SYS) + dev_dbg(chg->dev, "VBUS_IN2SYS_SNS.\n"); + if (data & PF1550_VBUS_OVLO) + dev_dbg(chg->dev, "VBUS_OVLO_SNS.\n"); + if (data & PF1550_VBUS_VALID) { + chg->psy_desc.type = POWER_SUPPLY_TYPE_MAINS; + psy_changed = true; + dev_dbg(chg->dev, "VBUS attached.\n"); + } + + if (psy_changed) + power_supply_changed(chg->charger); +} + +static irqreturn_t pf1550_charger_irq_handler(int irq, void *data) +{ + struct pf1550_charger *chg = data; + struct device *dev = chg->dev; + struct platform_device *pdev = to_platform_device(dev); + int i, irq_type = -1; + + for (i = 0; i < PF1550_CHARGER_IRQ_NR; i++) + if (irq == platform_get_irq(pdev, i)) + irq_type = i; + + switch (irq_type) { + case PF1550_CHARG_IRQ_BAT2SOCI: + dev_info(dev, "BAT to SYS Overcurrent interrupt.\n"); + break; + case PF1550_CHARG_IRQ_BATI: + schedule_delayed_work(&chg->bat_sense_work, + msecs_to_jiffies(10)); + break; + case PF1550_CHARG_IRQ_CHGI: + schedule_delayed_work(&chg->chg_sense_work, + msecs_to_jiffies(10)); + break; + case PF1550_CHARG_IRQ_VBUSI: + schedule_delayed_work(&chg->vbus_sense_work, + msecs_to_jiffies(10)); + break; + case PF1550_CHARG_IRQ_THMI: + dev_info(dev, "Thermal interrupt.\n"); + break; + default: + dev_err(dev, "unknown interrupt occurred.\n"); + } + + return IRQ_HANDLED; +} + +static enum power_supply_property pf1550_charger_props[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_CHARGE_TYPE, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +static int pf1550_charger_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct pf1550_charger *chg = power_supply_get_drvdata(psy); + struct regmap *regmap = chg->pf1550->regmap; + int ret = 0; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + ret = pf1550_get_charger_state(regmap, &val->intval); + break; + case POWER_SUPPLY_PROP_CHARGE_TYPE: + ret = pf1550_get_charge_type(regmap, &val->intval); + break; + case POWER_SUPPLY_PROP_HEALTH: + ret = pf1550_get_battery_health(regmap, &val->intval); + break; + case POWER_SUPPLY_PROP_PRESENT: + ret = pf1550_get_present(regmap, &val->intval); + break; + case POWER_SUPPLY_PROP_ONLINE: + ret = pf1550_get_online(regmap, &val->intval); + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = pf1550_charger_model; + break; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = pf1550_charger_manufacturer; + break; + default: + return -EINVAL; + } + + return ret; +} + +static int pf1550_set_constant_volt(struct pf1550_charger *chg, + unsigned int uvolt) +{ + unsigned int data; + + if (uvolt >= 3500000 && uvolt <= 4440000) + data = 8 + (uvolt - 3500000) / 20000; + else + return dev_err_probe(chg->dev, -EINVAL, + "Wrong value for constant voltage\n"); + + dev_dbg(chg->dev, "Charging constant voltage: %u (0x%x)\n", uvolt, + data); + + return regmap_update_bits(chg->pf1550->regmap, + PF1550_CHARG_REG_BATT_REG, + PF1550_CHARG_REG_BATT_REG_CHGCV_MASK, data); +} + +static int pf1550_set_min_system_volt(struct pf1550_charger *chg, + unsigned int uvolt) +{ + unsigned int data; + + switch (uvolt) { + case 3500000: + data = 0x0; + break; + case 3700000: + data = 0x1; + break; + case 4300000: + data = 0x2; + break; + default: + return dev_err_probe(chg->dev, -EINVAL, + "Wrong value for minimum system voltage\n"); + } + + data <<= PF1550_CHARG_REG_BATT_REG_VMINSYS_SHIFT; + + dev_dbg(chg->dev, "Minimum system regulation voltage: %u (0x%x)\n", + uvolt, data); + + return regmap_update_bits(chg->pf1550->regmap, + PF1550_CHARG_REG_BATT_REG, + PF1550_CHARG_REG_BATT_REG_VMINSYS_MASK, data); +} + +static int pf1550_set_thermal_regulation_temp(struct pf1550_charger *chg, + unsigned int cells) +{ + unsigned int data; + + switch (cells) { + case 60: + data = 0x0; + break; + case 75: + data = 0x1; + break; + case 90: + data = 0x2; + break; + case 105: + data = 0x3; + break; + default: + return dev_err_probe(chg->dev, -EINVAL, + "Wrong value for thermal temperature\n"); + } + + data <<= PF1550_CHARG_REG_THM_REG_CNFG_REGTEMP_SHIFT; + + dev_dbg(chg->dev, "Thermal regulation loop temperature: %u (0x%x)\n", + cells, data); + + return regmap_update_bits(chg->pf1550->regmap, + PF1550_CHARG_REG_THM_REG_CNFG, + PF1550_CHARG_REG_THM_REG_CNFG_REGTEMP_MASK, + data); +} + +/* + * Sets charger registers to proper and safe default values. + */ +static int pf1550_reg_init(struct pf1550_charger *chg) +{ + struct device *dev = chg->dev; + int ret; + unsigned int data; + + /* Unmask charger interrupt, mask DPMI and reserved bit */ + ret = regmap_write(chg->pf1550->regmap, PF1550_CHARG_REG_CHG_INT_MASK, + PF1550_CHG_INT_MASK); + if (ret) + return dev_err_probe(dev, ret, + "Error unmask charger interrupt\n"); + + ret = regmap_read(chg->pf1550->regmap, PF1550_CHARG_REG_VBUS_SNS, + &data); + if (ret) + return dev_err_probe(dev, ret, "Read charg vbus_sns error\n"); + + if (data & PF1550_VBUS_VALID) + chg->psy_desc.type = POWER_SUPPLY_TYPE_MAINS; + + ret = pf1550_set_constant_volt(chg, chg->constant_volt); + if (ret) + return ret; + + ret = pf1550_set_min_system_volt(chg, chg->min_system_volt); + if (ret) + return ret; + + ret = pf1550_set_thermal_regulation_temp(chg, + chg->thermal_regulation_temp); + if (ret) + return ret; + + /* Turn on charger */ + ret = regmap_write(chg->pf1550->regmap, PF1550_CHARG_REG_CHG_OPER, + PF1550_CHG_TURNON); + if (ret) + return dev_err_probe(dev, ret, "Error turn on charger\n"); + + return 0; +} + +static void pf1550_dt_parse_dev_info(struct pf1550_charger *chg) +{ + struct device *dev = chg->dev; + struct power_supply_battery_info *info; + + if (device_property_read_u32(dev->parent, "nxp,min-system-microvolt", + &chg->min_system_volt)) + chg->min_system_volt = PF1550_DEFAULT_MIN_SYSTEM_VOLT; + + if (device_property_read_u32(dev->parent, + "nxp,thermal-regulation-celsius", + &chg->thermal_regulation_temp)) + chg->thermal_regulation_temp = PF1550_DEFAULT_THERMAL_TEMP; + + if (power_supply_get_battery_info(chg->charger, &info)) + chg->constant_volt = PF1550_DEFAULT_CONSTANT_VOLT; + else + chg->constant_volt = info->constant_charge_voltage_max_uv; +} + +static int pf1550_charger_probe(struct platform_device *pdev) +{ + const struct pf1550_dev *pf1550 = dev_get_drvdata(pdev->dev.parent); + struct power_supply_config psy_cfg = {}; + struct pf1550_charger *chg; + int i, irq, ret; + + chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL); + if (!chg) + return -ENOMEM; + + chg->dev = &pdev->dev; + chg->pf1550 = pf1550; + + if (!chg->pf1550->regmap) + return dev_err_probe(&pdev->dev, -ENODEV, + "failed to get regmap\n"); + + platform_set_drvdata(pdev, chg); + + INIT_DELAYED_WORK(&chg->vbus_sense_work, pf1550_chg_vbus_work); + INIT_DELAYED_WORK(&chg->chg_sense_work, pf1550_chg_chg_work); + INIT_DELAYED_WORK(&chg->bat_sense_work, pf1550_chg_bat_work); + + for (i = 0; i < PF1550_CHARGER_IRQ_NR; i++) { + irq = platform_get_irq(pdev, i); + if (irq < 0) + return irq; + + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + pf1550_charger_irq_handler, + IRQF_NO_SUSPEND, + "pf1550-charger", chg); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "failed irq request\n"); + } + + psy_cfg.drv_data = chg; + + chg->psy_desc.name = PF1550_CHARGER_NAME; + chg->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY; + chg->psy_desc.get_property = pf1550_charger_get_property; + chg->psy_desc.properties = pf1550_charger_props; + chg->psy_desc.num_properties = ARRAY_SIZE(pf1550_charger_props); + + chg->charger = devm_power_supply_register(&pdev->dev, &chg->psy_desc, + &psy_cfg); + if (IS_ERR(chg->charger)) + return dev_err_probe(&pdev->dev, PTR_ERR(chg->charger), + "failed: power supply register\n"); + + pf1550_dt_parse_dev_info(chg); + + return pf1550_reg_init(chg); +} + +static void pf1550_charger_remove(struct platform_device *pdev) +{ + struct pf1550_charger *chg = platform_get_drvdata(pdev); + + cancel_delayed_work_sync(&chg->bat_sense_work); + cancel_delayed_work_sync(&chg->chg_sense_work); + cancel_delayed_work_sync(&chg->vbus_sense_work); +} + +static const struct platform_device_id pf1550_charger_id[] = { + { "pf1550-charger", 0 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, pf1550_charger_id); + +static struct platform_driver pf1550_charger_driver = { + .driver = { + .name = "pf1550-charger", + }, + .probe = pf1550_charger_probe, + .remove = pf1550_charger_remove, + .id_table = pf1550_charger_id, +}; +module_platform_driver(pf1550_charger_driver); + +MODULE_AUTHOR("Robin Gong "); +MODULE_DESCRIPTION("PF1550 charger driver"); +MODULE_LICENSE("GPL");