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Sat, 21 Jun 2025 11:03:48 -0700 (PDT) From: Chris Morgan To: linux-pm@vger.kernel.org Cc: linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, broonie@kernel.org, lgirdwood@gmail.com, sre@kernel.org, heiko@sntech.de, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, lee@kernel.org, Chris Morgan Subject: [PATCH V2 2/5] mfd: bq257xx: Add support for BQ25703A core driver Date: Sat, 21 Jun 2025 13:01:16 -0500 Message-ID: <20250621180119.163423-3-macroalpha82@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250621180119.163423-1-macroalpha82@gmail.com> References: <20250621180119.163423-1-macroalpha82@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Chris Morgan The Texas Instruments BQ25703A is an integrated charger manager and boost converter. The MFD driver initalizes the device for the regulator driver and power supply driver. Signed-off-by: Chris Morgan --- drivers/mfd/Kconfig | 11 ++++ drivers/mfd/Makefile | 1 + drivers/mfd/bq257xx.c | 104 ++++++++++++++++++++++++++++++++++ include/linux/mfd/bq257xx.h | 108 ++++++++++++++++++++++++++++++++++++ 4 files changed, 224 insertions(+) create mode 100644 drivers/mfd/bq257xx.c create mode 100644 include/linux/mfd/bq257xx.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 6fb3768e3d71..d8b39e8a8a17 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1585,6 +1585,17 @@ config MFD_TI_LMU LM36274. It consists of backlight, LED and regulator driver. It provides consistent device controls for lighting functions. +config MFD_BQ257XX + tristate "TI BQ257XX Buck/Boost Charge Controller" + depends on I2C + select MFD_CORE + select REGMAP_I2C + help + Support Texas Instruments BQ25703 Buck/Boost converter with + charge controller. It consists of regulators that provide + system voltage and OTG voltage, and a charger manager for + batteries containing one or more cells. + config MFD_OMAP_USB_HOST bool "TI OMAP USBHS core and TLL driver" depends on USB_EHCI_HCD_OMAP || USB_OHCI_HCD_OMAP3 diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 79495f9f3457..06da932cce5d 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_MFD_SM501) += sm501.o obj-$(CONFIG_ARCH_BCM2835) += bcm2835-pm.o obj-$(CONFIG_MFD_BCM590XX) += bcm590xx.o obj-$(CONFIG_MFD_BD9571MWV) += bd9571mwv.o +obj-$(CONFIG_MFD_BQ257XX) += bq257xx.o obj-$(CONFIG_MFD_CGBC) += cgbc-core.o obj-$(CONFIG_MFD_CROS_EC_DEV) += cros_ec_dev.o obj-$(CONFIG_MFD_CS42L43) += cs42l43.o diff --git a/drivers/mfd/bq257xx.c b/drivers/mfd/bq257xx.c new file mode 100644 index 000000000000..27fbb64110ed --- /dev/null +++ b/drivers/mfd/bq257xx.c @@ -0,0 +1,104 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * BQ257XX Core Driver + * Copyright (C) 2024 Chris Morgan + */ + +#include +#include +#include +#include +#include + +static const struct regmap_range bq25703_readonly_reg_ranges[] = { + regmap_reg_range(BQ25703_CHARGER_STATUS, BQ25703_MANUFACT_DEV_ID), +}; + +static const struct regmap_access_table bq25703_writeable_regs = { + .no_ranges = bq25703_readonly_reg_ranges, + .n_no_ranges = ARRAY_SIZE(bq25703_readonly_reg_ranges), +}; + +static const struct regmap_range bq25703_volatile_reg_ranges[] = { + regmap_reg_range(BQ25703_CHARGE_OPTION_0, BQ25703_IIN_HOST), + regmap_reg_range(BQ25703_CHARGER_STATUS, BQ25703_ADC_OPTION), +}; + +static const struct regmap_access_table bq25703_volatile_regs = { + .yes_ranges = bq25703_volatile_reg_ranges, + .n_yes_ranges = ARRAY_SIZE(bq25703_volatile_reg_ranges), +}; + +static const struct regmap_config bq25703_regmap_config = { + .reg_bits = 8, + .val_bits = 16, + .max_register = BQ25703_ADC_OPTION, + .cache_type = REGCACHE_RBTREE, + .wr_table = &bq25703_writeable_regs, + .volatile_table = &bq25703_volatile_regs, + .val_format_endian = REGMAP_ENDIAN_LITTLE, +}; + +static const struct mfd_cell bq25703_cells[] = { + MFD_CELL_NAME("bq257xx-regulator"), + MFD_CELL_NAME("bq257xx-charger"), +}; + +static int bq257xx_probe(struct i2c_client *client) +{ + struct bq257xx_device *ddata; + const struct mfd_cell *cells; + int nr_cells; + int ret; + + ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL); + if (!ddata) + return -ENOMEM; + + ddata->client = client; + + cells = bq25703_cells; + nr_cells = ARRAY_SIZE(bq25703_cells); + ddata->regmap = devm_regmap_init_i2c(client, &bq25703_regmap_config); + if (IS_ERR(ddata->regmap)) { + dev_err(&client->dev, "Failed to allocate register map\n"); + return PTR_ERR(ddata->regmap); + } + + i2c_set_clientdata(client, ddata); + + ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO, + cells, nr_cells, NULL, 0, NULL); + if (ret) { + dev_err(&client->dev, "Failed to register child devices %d\n", ret); + return ret; + } + + return ret; +} + +static const struct i2c_device_id bq257xx_i2c_ids[] = { + { "bq25703a" }, + {} +}; +MODULE_DEVICE_TABLE(i2c, bq257xx_i2c_ids); + +static const struct of_device_id bq257xx_of_match[] = { + { .compatible = "ti,bq25703a" }, + {} +}; +MODULE_DEVICE_TABLE(of, bq257xx_of_match); + +static struct i2c_driver bq257xx_driver = { + .driver = { + .name = "bq257xx", + .of_match_table = bq257xx_of_match, + }, + .probe = bq257xx_probe, + .id_table = bq257xx_i2c_ids, +}; +module_i2c_driver(bq257xx_driver); + +MODULE_DESCRIPTION("bq257xx buck/boost/charger driver"); +MODULE_AUTHOR("Chris Morgan "); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/bq257xx.h b/include/linux/mfd/bq257xx.h new file mode 100644 index 000000000000..153a96248f32 --- /dev/null +++ b/include/linux/mfd/bq257xx.h @@ -0,0 +1,108 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Register definitions for TI BQ257XX + * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/ + */ + +#define BQ25703_CHARGE_OPTION_0 0x00 +#define BQ25703_CHARGE_CURRENT 0x02 +#define BQ25703_MAX_CHARGE_VOLT 0x04 +#define BQ25703_OTG_VOLT 0x06 +#define BQ25703_OTG_CURRENT 0x08 +#define BQ25703_INPUT_VOLTAGE 0x0a +#define BQ25703_MIN_VSYS 0x0c +#define BQ25703_IIN_HOST 0x0e +#define BQ25703_CHARGER_STATUS 0x20 +#define BQ25703_PROCHOT_STATUS 0x22 +#define BQ25703_IIN_DPM 0x24 +#define BQ25703_ADCIBAT_CHG 0x28 +#define BQ25703_ADCIINCMPIN 0x2a +#define BQ25703_ADCVSYSVBAT 0x2c +#define BQ25703_MANUFACT_DEV_ID 0x2e +#define BQ25703_CHARGE_OPTION_1 0x30 +#define BQ25703_CHARGE_OPTION_2 0x32 +#define BQ25703_CHARGE_OPTION_3 0x34 +#define BQ25703_ADC_OPTION 0x3a + +#define BQ25703_EN_LWPWR BIT(15) +#define BQ25703_WDTMR_ADJ_MASK GENMASK(14, 13) +#define BQ25703_WDTMR_DISABLE 0 +#define BQ25703_WDTMR_5_SEC 1 +#define BQ25703_WDTMR_88_SEC 2 +#define BQ25703_WDTMR_175_SEC 3 + +#define BQ25703_ICHG_MASK GENMASK(12, 6) +#define BQ25703_ICHG_STEP_UA 64000 +#define BQ25703_ICHG_MIN_UA 64000 +#define BQ25703_ICHG_MAX_UA 8128000 + +#define BQ25703_MAX_CHARGE_VOLT_MASK GENMASK(15, 4) +#define BQ25703_VBATREG_STEP_UV 16000 +#define BQ25703_VBATREG_MIN_UV 1024000 +#define BQ25703_VBATREG_MAX_UV 19200000 + +#define BQ25703_OTG_VOLT_MASK GENMASK(13, 6) +#define BQ25703_OTG_VOLT_STEP_UV 64000 +#define BQ25703_OTG_VOLT_MIN_UV 4480000 +#define BQ25703_OTG_VOLT_MAX_UV 20800000 +#define BQ25703_OTG_VOLT_NUM_VOLT 256 + +#define BQ25703_OTG_CUR_MASK GENMASK(14, 8) +#define BQ25703_OTG_CUR_STEP_UA 50000 +#define BQ25703_OTG_CUR_MAX_UA 6350000 + +#define BQ25703_MINVSYS_MASK GENMASK(13, 8) +#define BQ25703_MINVSYS_STEP_UV 256000 +#define BQ25703_MINVSYS_MIN_UV 1024000 +#define BQ25703_MINVSYS_MAX_UV 16128000 + +#define BQ25703_STS_AC_STAT BIT(15) +#define BQ25703_STS_IN_FCHRG BIT(10) +#define BQ25703_STS_IN_PCHRG BIT(9) +#define BQ25703_STS_FAULT_ACOV BIT(7) +#define BQ25703_STS_FAULT_BATOC BIT(6) +#define BQ25703_STS_FAULT_ACOC BIT(5) + +#define BQ25703_IINDPM_MASK GENMASK(14, 8) +#define BQ25703_IINDPM_STEP_UA 50000 +#define BQ25703_IINDPM_MIN_UA 50000 +#define BQ25703_IINDPM_MAX_UA 6400000 +#define BQ25703_IINDPM_DEFAULT_UA 3300000 +#define BQ25703_IINDPM_OFFSET_UA 50000 + +#define BQ25703_ADCIBAT_DISCHG_MASK GENMASK(6, 0) +#define BQ25703_ADCIBAT_CHG_MASK GENMASK(14, 8) +#define BQ25703_ADCIBAT_CHG_STEP_UA 64000 +#define BQ25703_ADCIBAT_DIS_STEP_UA 256000 + +#define BQ25703_ADCIIN GENMASK(15, 8) +#define BQ25703_ADCIINCMPIN_STEP 50000 + +#define BQ25703_ADCVSYS_MASK GENMASK(15, 8) +#define BQ25703_ADCVBAT_MASK GENMASK(7, 0) +#define BQ25703_ADCVSYSVBAT_OFFSET_UV 2880000 +#define BQ25703_ADCVSYSVBAT_STEP 64000 + +#define BQ25703_ADC_CH_MASK GENMASK(7, 0) +#define BQ25703_ADC_CONV_EN BIT(15) +#define BQ25703_ADC_START BIT(14) +#define BQ25703_ADC_FULL_SCALE BIT(13) +#define BQ25703_ADC_CMPIN_EN BIT(7) +#define BQ25703_ADC_VBUS_EN BIT(6) +#define BQ25703_ADC_PSYS_EN BIT(5) +#define BQ25703_ADC_IIN_EN BIT(4) +#define BQ25703_ADC_IDCHG_EN BIT(3) +#define BQ25703_ADC_ICHG_EN BIT(2) +#define BQ25703_ADC_VSYS_EN BIT(1) +#define BQ25703_ADC_VBAT_EN BIT(0) + +#define BQ25703_EN_OTG_MASK BIT(12) + +enum bq257xx_id { + BQ25703A, +}; 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Sat, 21 Jun 2025 11:03:50 -0700 (PDT) Received: from localhost.localdomain ([2600:1700:fb0:1bc0::54]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-73a90ca8707sm782895a34.46.2025.06.21.11.03.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 21 Jun 2025 11:03:50 -0700 (PDT) From: Chris Morgan To: linux-pm@vger.kernel.org Cc: linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, broonie@kernel.org, lgirdwood@gmail.com, sre@kernel.org, heiko@sntech.de, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, lee@kernel.org, Chris Morgan Subject: [PATCH V2 4/5] regulator: bq257xx: Add bq257xx boost regulator driver Date: Sat, 21 Jun 2025 13:01:18 -0500 Message-ID: <20250621180119.163423-5-macroalpha82@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250621180119.163423-1-macroalpha82@gmail.com> References: <20250621180119.163423-1-macroalpha82@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Chris Morgan Add support for the boost regulator found in the Texas Instruments BQ25703. The boost regulator is capable of outputting between 4.48 and 20.8 volts and between 0 and 6.35 amps. Signed-off-by: Chris Morgan --- drivers/regulator/Kconfig | 8 ++ drivers/regulator/Makefile | 1 + drivers/regulator/bq257xx-regulator.c | 188 ++++++++++++++++++++++++++ 3 files changed, 197 insertions(+) create mode 100644 drivers/regulator/bq257xx-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 6d8988387da4..53cd33afe6d5 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -297,6 +297,14 @@ config REGULATOR_BD96801 This driver can also be built as a module. If so, the module will be called bd96801-regulator. +config REGULATOR_BQ257XX + tristate "TI BQ257XX regulator family" + depends on MFD_BQ257XX + depends on GPIOLIB || COMPILE_TEST + help + Say Y to enable support for the boost regulator function of + the BQ257XX family of charger circuits. + config REGULATOR_CPCAP tristate "Motorola CPCAP regulator" depends on MFD_CPCAP diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index c0bc7a0f4e67..d6024189a248 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -38,6 +38,7 @@ obj-$(CONFIG_REGULATOR_BD71828) += bd71828-regulator.o obj-$(CONFIG_REGULATOR_BD718XX) += bd718x7-regulator.o obj-$(CONFIG_REGULATOR_BD9571MWV) += bd9571mwv-regulator.o obj-$(CONFIG_REGULATOR_BD957XMUF) += bd9576-regulator.o +obj-$(CONFIG_REGULATOR_BQ257XX) += bq257xx-regulator.o obj-$(CONFIG_REGULATOR_DA903X) += da903x-regulator.o obj-$(CONFIG_REGULATOR_BD96801) += bd96801-regulator.o obj-$(CONFIG_REGULATOR_DA9052) += da9052-regulator.o diff --git a/drivers/regulator/bq257xx-regulator.c b/drivers/regulator/bq257xx-regulator.c new file mode 100644 index 000000000000..63bb61cb16a8 --- /dev/null +++ b/drivers/regulator/bq257xx-regulator.c @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0 +/* BQ257XX Battery Charger Driver + * Copyright (C) 2024 Chris Morgan + * Based off of BQ256XX Battery Charger driver and + * RK808 Regulator driver. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +struct bq257xx_reg_data { + struct bq257xx_device *bq; + struct regulator_dev *bq257xx_reg; + struct gpio_desc *otg_en_gpio; + struct regulator_desc desc; +}; + +static int bq25703_vbus_get_cur_limit(struct regulator_dev *rdev) +{ + struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev); + int ret; + unsigned int reg; + + ret = regmap_read(pdata->bq->regmap, BQ25703_OTG_CURRENT, ®); + if (ret) + return ret; + return FIELD_GET(BQ25703_OTG_CUR_MASK, reg) * BQ25703_OTG_CUR_STEP_UA; +} + +/* + * Check if the minimum current and maximum current requested are + * sane values, then set the register accordingly. + */ +static int bq25703_vbus_set_cur_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev); + unsigned int reg; + + if ((min_uA > BQ25703_OTG_CUR_MAX_UA) || (max_uA < 0)) + return -EINVAL; + + reg = (max_uA / BQ25703_OTG_CUR_STEP_UA); + + /* Catch rounding errors since our step is 50000uA. */ + if ((reg * BQ25703_OTG_CUR_STEP_UA) < min_uA) + return -EINVAL; + + return regmap_write(pdata->bq->regmap, BQ25703_OTG_CURRENT, + FIELD_PREP(BQ25703_OTG_CUR_MASK, reg)); +} + +static int bq25703_vbus_enable(struct regulator_dev *rdev) +{ + struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev); + + if (pdata->otg_en_gpio) + gpiod_set_value_cansleep(pdata->otg_en_gpio, 1); + return regulator_enable_regmap(rdev); +} + +static int bq25703_vbus_disable(struct regulator_dev *rdev) +{ + struct bq257xx_reg_data *pdata = rdev_get_drvdata(rdev); + + if (pdata->otg_en_gpio) + gpiod_set_value_cansleep(pdata->otg_en_gpio, 0); + return regulator_disable_regmap(rdev); +} + +static const struct regulator_ops bq25703_vbus_ops = { + .enable = bq25703_vbus_enable, + .disable = bq25703_vbus_disable, + .is_enabled = regulator_is_enabled_regmap, + .list_voltage = regulator_list_voltage_linear, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_current_limit = bq25703_vbus_get_cur_limit, + .set_current_limit = bq25703_vbus_set_cur_limit, +}; + +static const struct regulator_desc bq25703_vbus_desc = { + .name = "usb_otg_vbus", + .of_match = of_match_ptr("usb-otg-vbus"), + .regulators_node = of_match_ptr("regulators"), + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .ops = &bq25703_vbus_ops, + .min_uV = BQ25703_OTG_VOLT_MIN_UV, + .uV_step = BQ25703_OTG_VOLT_STEP_UV, + .n_voltages = BQ25703_OTG_VOLT_NUM_VOLT, + .enable_mask = BQ25703_EN_OTG_MASK, + .enable_reg = BQ25703_CHARGE_OPTION_3, + .enable_val = BQ25703_EN_OTG_MASK, + .disable_val = 0, + .vsel_reg = BQ25703_OTG_VOLT, + .vsel_mask = BQ25703_OTG_VOLT_MASK, +}; + +/* Get optional GPIO for OTG regulator enable. */ +static void bq257xx_reg_dt_parse_gpio(struct platform_device *pdev) +{ + struct device_node *child, *subchild; + struct bq257xx_reg_data *pdata = platform_get_drvdata(pdev); + + child = of_get_child_by_name(pdev->dev.of_node, + pdata->desc.regulators_node); + if (!child) + return; + + subchild = of_get_child_by_name(child, pdata->desc.of_match); + if (!subchild) + return; + + of_node_put(child); + + pdata->otg_en_gpio = devm_fwnode_gpiod_get_index(&pdev->dev, + of_fwnode_handle(subchild), + "enable", 0, + GPIOD_OUT_LOW, + pdata->desc.of_match); + + of_node_put(subchild); + + if (IS_ERR_OR_NULL(pdata->otg_en_gpio)) { + dev_err(&pdev->dev, "Error getting enable gpio: %ld\n", + PTR_ERR(pdata->otg_en_gpio)); + return; + } +} + +static int bq257xx_regulator_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct bq257xx_device *bq = dev_get_drvdata(pdev->dev.parent); + struct bq257xx_reg_data *pdata; + struct device_node *np = dev->of_node; + struct regulator_init_data *init_data; + struct regulator_config cfg = {}; + + pdev->dev.of_node = pdev->dev.parent->of_node; + pdev->dev.of_node_reused = true; + + pdata = devm_kzalloc(&pdev->dev, sizeof(struct bq257xx_reg_data), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + pdata->bq = bq; + pdata->desc = bq25703_vbus_desc; + + platform_set_drvdata(pdev, pdata); + bq257xx_reg_dt_parse_gpio(pdev); + + cfg.dev = &pdev->dev; + cfg.init_data = init_data; + cfg.driver_data = pdata; + cfg.of_node = np; + cfg.regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!cfg.regmap) + return -ENODEV; + + pdata->bq257xx_reg = devm_regulator_register(dev, &pdata->desc, &cfg); + if (IS_ERR(pdata->bq257xx_reg)) { + return dev_err_probe(&pdev->dev, PTR_ERR(pdata->bq257xx_reg), + "error registering bq257xx regulator"); + } + + return 0; +} + +static struct platform_driver bq257xx_reg_driver = { + .driver = { + .name = "bq257xx-regulator", + }, + .probe = bq257xx_regulator_probe, +}; + +module_platform_driver(bq257xx_reg_driver); + +MODULE_DESCRIPTION("bq257xx regulator driver"); +MODULE_AUTHOR("Chris Morgan "); +MODULE_LICENSE("GPL");