* [PATCH V2 2/5] mfd: bq257xx: Add support for BQ25703A core driver
2025-06-21 18:01 [PATCH V2 0/5] Add Texas Instruments BQ25703A Charger Chris Morgan
2025-06-21 18:01 ` [PATCH V2 1/5] dt-bindings: mfd: ti,bq25703a: Add TI " Chris Morgan
@ 2025-06-21 18:01 ` Chris Morgan
2025-06-21 18:01 ` [PATCH V2 3/5] power: supply: bq257xx: Add support for BQ257XX charger manager Chris Morgan
` (2 subsequent siblings)
4 siblings, 0 replies; 10+ messages in thread
From: Chris Morgan @ 2025-06-21 18:01 UTC (permalink / raw)
To: linux-pm
Cc: linux-rockchip, devicetree, broonie, lgirdwood, sre, heiko,
conor+dt, krzk+dt, robh, lee, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
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 <macromorgan@hotmail.com>
---
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 <macromorgan@hotmail.com>
+ */
+
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/mfd/bq257xx.h>
+#include <linux/mfd/core.h>
+#include <linux/regmap.h>
+
+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 <macromorgan@hotmail.com>");
+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,
+};
+
+struct bq257xx_device {
+ struct i2c_client *client;
+ struct regmap *regmap;
+};
--
2.43.0
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH V2 3/5] power: supply: bq257xx: Add support for BQ257XX charger manager
2025-06-21 18:01 [PATCH V2 0/5] Add Texas Instruments BQ25703A Charger Chris Morgan
2025-06-21 18:01 ` [PATCH V2 1/5] dt-bindings: mfd: ti,bq25703a: Add TI " Chris Morgan
2025-06-21 18:01 ` [PATCH V2 2/5] mfd: bq257xx: Add support for BQ25703A core driver Chris Morgan
@ 2025-06-21 18:01 ` Chris Morgan
2025-06-22 12:59 ` kernel test robot
2025-06-22 22:37 ` Sebastian Reichel
2025-06-21 18:01 ` [PATCH V2 4/5] regulator: bq257xx: Add bq257xx boost regulator driver Chris Morgan
2025-06-21 18:01 ` [PATCH V2 5/5] arm64: dts: rockchip: Add USB and charger to Gameforce Ace Chris Morgan
4 siblings, 2 replies; 10+ messages in thread
From: Chris Morgan @ 2025-06-21 18:01 UTC (permalink / raw)
To: linux-pm
Cc: linux-rockchip, devicetree, broonie, lgirdwood, sre, heiko,
conor+dt, krzk+dt, robh, lee, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
Add support for the charger function of the BQ257XX. The device is
capable of charging batteries with a layout of 1 to 4 cells in
series.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
drivers/power/supply/Kconfig | 7 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/bq257xx_charger.c | 754 +++++++++++++++++++++++++
3 files changed, 762 insertions(+)
create mode 100644 drivers/power/supply/bq257xx_charger.c
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 79ddb006e2da..11893c50c5d2 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -767,6 +767,13 @@ config CHARGER_BQ2515X
rail, ADC for battery and system monitoring, and push-button
controller.
+config CHARGER_BQ257XX
+ tristate "TI BQ257XX battery charger family"
+ depends on MFD_BQ257XX
+ help
+ Say Y to enable support for the TI BQ257XX family of battery
+ charging integrated circuits.
+
config CHARGER_BQ25890
tristate "TI BQ25890 battery charger driver"
depends on I2C
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 4f5f8e3507f8..425caeb31fc2 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -97,6 +97,7 @@ obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
obj-$(CONFIG_CHARGER_BQ24257) += bq24257_charger.o
obj-$(CONFIG_CHARGER_BQ24735) += bq24735-charger.o
obj-$(CONFIG_CHARGER_BQ2515X) += bq2515x_charger.o
+obj-$(CONFIG_CHARGER_BQ257XX) += bq257xx_charger.o
obj-$(CONFIG_CHARGER_BQ25890) += bq25890_charger.o
obj-$(CONFIG_CHARGER_BQ25980) += bq25980_charger.o
obj-$(CONFIG_CHARGER_BQ256XX) += bq256xx_charger.o
diff --git a/drivers/power/supply/bq257xx_charger.c b/drivers/power/supply/bq257xx_charger.c
new file mode 100644
index 000000000000..3d7ea423d2df
--- /dev/null
+++ b/drivers/power/supply/bq257xx_charger.c
@@ -0,0 +1,754 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * BQ257XX Battery Charger Driver
+ * Copyright (C) 2024 Chris Morgan <macromorgan@hotmail.com>
+ * Based off of BQ256XX Battery Charger Driver
+ * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+#include <linux/bitfield.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/bq257xx.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+
+/* Forward declaration of driver data. */
+struct bq257xx_chg;
+
+/**
+ * struct bq257xx_chip_info - chip specific routines
+ * @bq257xx_hw_init: init function for hw
+ * @bq257xx_hw_shutdown: shutdown function for hw
+ * @bq257xx_get_state: get and update state of hardware
+ * @bq257xx_set_ichg: set maximum charge current (in uA)
+ * @bq257xx_set_vbatreg: set maximum charge voltage (in uV)
+ * @bq257xx_set_iindpm: set maximum input current (in uA)
+ */
+struct bq257xx_chip_info {
+ int (*bq257xx_hw_init)(struct bq257xx_chg *pdata);
+ void (*bq257xx_hw_shutdown)(struct bq257xx_chg *pdata);
+ int (*bq257xx_get_state)(struct bq257xx_chg *pdata);
+ int (*bq257xx_set_ichg)(struct bq257xx_chg *pdata, int ichg);
+ int (*bq257xx_set_vbatreg)(struct bq257xx_chg *pdata, int vbatreg);
+ int (*bq257xx_set_iindpm)(struct bq257xx_chg *pdata, int iindpm);
+};
+
+/**
+ * struct bq257xx_chg - driver data for charger
+ * @bq257xx_chip_info: hw specific functions
+ * @bq257xx_device: parent MFD device
+ * @charger: power supply device
+ * @online: charger input is present
+ * @fast_charge: charger is in fast charge mode
+ * @pre_charge: charger is in pre-charge mode
+ * @ov_fault: charger reports over voltage fault
+ * @batoc_fault: charger reports battery over current fault
+ * @oc_fault: charger reports over current fault
+ * @usb_type: USB type reported from parent power supply
+ * @supplied: Status of parent power supply
+ * @iindpm_max: maximum input current limit (uA)
+ * @vbat_max: maximum charge voltage (uV)
+ * @ichg_max: maximum charge current (uA)
+ * @vsys_min: minimum system voltage (uV)
+ */
+struct bq257xx_chg {
+ const struct bq257xx_chip_info *chip;
+ struct bq257xx_device *bq;
+ struct power_supply *charger;
+ bool online;
+ bool fast_charge;
+ bool pre_charge;
+ bool ov_fault;
+ bool batoc_fault;
+ bool oc_fault;
+ int usb_type;
+ int supplied;
+ u32 iindpm_max;
+ u32 vbat_max;
+ u32 ichg_max;
+ u32 vsys_min;
+};
+
+/**
+ * bq25703_get_state() - Get the current state of the device
+ * @pdata: driver platform data
+ *
+ * Get the current state of the charger. Check if the charger is
+ * powered, what kind of charge state (if any) the device is in,
+ * and if there are any active faults.
+ *
+ * Return: Returns 0 on success, or error on failure to read device.
+ */
+static int bq25703_get_state(struct bq257xx_chg *pdata)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(pdata->bq->regmap, BQ25703_CHARGER_STATUS, ®);
+ if (ret)
+ return ret;
+
+ pdata->online = reg & BQ25703_STS_AC_STAT;
+ pdata->fast_charge = reg & BQ25703_STS_IN_FCHRG;
+ pdata->pre_charge = reg & BQ25703_STS_IN_PCHRG;
+ pdata->ov_fault = reg & BQ25703_STS_FAULT_ACOV;
+ pdata->batoc_fault = reg & BQ25703_STS_FAULT_BATOC;
+ pdata->oc_fault = reg & BQ25703_STS_FAULT_ACOC;
+
+ return 0;
+}
+
+/**
+ * bq25703_get_min_vsys() - Get the minimum system voltage
+ * @pdata: driver platform data
+ * @intval: value for minimum voltage
+ *
+ * Return: Returns 0 on success or error on failure to read.
+ */
+static int bq25703_get_min_vsys(struct bq257xx_chg *pdata, int *intval)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(pdata->bq->regmap, BQ25703_MIN_VSYS,
+ ®);
+ if (ret)
+ return ret;
+
+ reg = FIELD_GET(BQ25703_MINVSYS_MASK, reg);
+ *intval = (reg * BQ25703_MINVSYS_STEP_UV) + BQ25703_MINVSYS_MIN_UV;
+
+ return ret;
+}
+
+/**
+ * bq25703_set_min_vsys() - Set the minimum system voltage
+ * @pdata: driver platform data
+ * @ichg: voltage value to set in uV.
+ *
+ * This function takes a requested minimum system voltage value, clamps
+ * it between the minimum supported value by the charger and a user
+ * defined minimum system value, and then writes the value to the
+ * appropriate register.
+ *
+ * Return: Returns 0 on success or error if an error occurs.
+ */
+static int bq25703_set_min_vsys(struct bq257xx_chg *pdata, int vsys)
+{
+ unsigned int reg;
+ int vsys_min = pdata->vsys_min;
+
+ vsys = clamp(vsys, BQ25703_MINVSYS_MIN_UV, vsys_min);
+ reg = ((vsys - BQ25703_MINVSYS_MIN_UV) / BQ25703_MINVSYS_STEP_UV);
+ reg = FIELD_PREP(BQ25703_MINVSYS_MASK, reg);
+
+ return regmap_write(pdata->bq->regmap, BQ25703_MIN_VSYS,
+ reg);
+}
+
+/**
+ * bq25703_get_cur() - Get the reported current from the battery
+ * @pdata: driver platform data
+ * @intval: value of reported battery current
+ *
+ * Read the reported current from the battery. Since value is always
+ * positive set sign to negative if discharging.
+ *
+ * Return: Returns 0 on success or error if unable to read value.
+ */
+static int bq25703_get_cur(struct bq257xx_chg *pdata, int *intval)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(pdata->bq->regmap, BQ25703_ADCIBAT_CHG, ®);
+ if (ret < 0)
+ return ret;
+
+ if (pdata->online)
+ *intval = FIELD_GET(BQ25703_ADCIBAT_CHG_MASK, reg) *
+ BQ25703_ADCIBAT_CHG_STEP_UA;
+ else
+ *intval = -(FIELD_GET(BQ25703_ADCIBAT_DISCHG_MASK, reg) *
+ BQ25703_ADCIBAT_DIS_STEP_UA);
+
+ return ret;
+}
+
+/**
+ * bq25703_get_ichg_cur() - Get the maximum reported charge current
+ * @pdata: driver platform data
+ * @intval: value of maximum reported charge current
+ *
+ * Get the maximum reported charge current from the battery.
+ *
+ * Return: Returns 0 on success or error if unable to read value.
+ */
+static int bq25703_get_ichg_cur(struct bq257xx_chg *pdata, int *intval)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(pdata->bq->regmap, BQ25703_CHARGE_CURRENT, ®);
+ if (ret)
+ return ret;
+
+ *intval = FIELD_GET(BQ25703_ICHG_MASK, reg) * BQ25703_ICHG_STEP_UA;
+
+ return ret;
+}
+
+/**
+ * bq25703_set_ichg_cur() - Set the maximum charge current
+ * @pdata: driver platform data
+ * @ichg: current value to set in uA.
+ *
+ * This function takes a requested maximum charge current value, clamps
+ * it between the minimum supported value by the charger and a user
+ * defined maximum charging value, and then writes the value to the
+ * appropriate register.
+ *
+ * Return: Returns 0 on success or error if an error occurs.
+ */
+static int bq25703_set_ichg_cur(struct bq257xx_chg *pdata, int ichg)
+{
+ unsigned int reg;
+ int ichg_max = pdata->ichg_max;
+
+ ichg = clamp(ichg, BQ25703_ICHG_MIN_UA, ichg_max);
+ reg = FIELD_PREP(BQ25703_ICHG_MASK, (ichg / BQ25703_ICHG_STEP_UA));
+
+ return regmap_write(pdata->bq->regmap, BQ25703_CHARGE_CURRENT,
+ reg);
+}
+
+/**
+ * bq25703_get_chrg_volt() - Get the maximum set charge voltage
+ * @pdata: driver platform data
+ * @intval: maximum charge voltage value
+ *
+ * Return: Returns 0 on success or error if unable to read value.
+ */
+static int bq25703_get_chrg_volt(struct bq257xx_chg *pdata, int *intval)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(pdata->bq->regmap, BQ25703_MAX_CHARGE_VOLT,
+ ®);
+ if (ret)
+ return ret;
+
+ *intval = FIELD_GET(BQ25703_MAX_CHARGE_VOLT_MASK, reg) *
+ BQ25703_VBATREG_STEP_UV;
+
+ return ret;
+}
+
+/**
+ * bq25703_set_chrg_volt() - Set the maximum charge voltage
+ * @pdata: driver platform data
+ * @vbat: voltage value to set in uV.
+ *
+ * This function takes a requested maximum charge voltage value, clamps
+ * it between the minimum supported value by the charger and a user
+ * defined maximum charging value, and then writes the value to the
+ * appropriate register.
+ *
+ * Return: Returns 0 on success or error if an error occurs.
+ */
+static int bq25703_set_chrg_volt(struct bq257xx_chg *pdata, int vbat)
+{
+ unsigned int reg;
+ int vbat_max = pdata->vbat_max;
+
+ vbat = clamp(vbat, BQ25703_VBATREG_MIN_UV, vbat_max);
+
+ reg = FIELD_PREP(BQ25703_MAX_CHARGE_VOLT_MASK,
+ (vbat / BQ25703_VBATREG_STEP_UV));
+
+ return regmap_write(pdata->bq->regmap, BQ25703_MAX_CHARGE_VOLT,
+ reg);
+}
+
+/**
+ * bq25703_get_iindpm() - Get the maximum set input current
+ * @pdata: driver platform data
+ * @intval: maximum input current value
+ *
+ * Read the actual input current limit from the device into intval.
+ * This can differ from the value programmed due to some autonomous
+ * functions that may be enabled (but are not currently). This is why
+ * there is a different register used.
+ *
+ * Return: Returns 0 on success or error if unable to read register
+ * value.
+ */
+static int bq25703_get_iindpm(struct bq257xx_chg *pdata, int *intval)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(pdata->bq->regmap, BQ25703_IIN_DPM, ®);
+ if (ret)
+ return ret;
+
+ reg = FIELD_GET(BQ25703_IINDPM_MASK, reg);
+ *intval = (reg * BQ25703_IINDPM_STEP_UA) + BQ25703_IINDPM_OFFSET_UA;
+
+ return ret;
+}
+
+/**
+ * bq25703_set_iindpm() - Set the maximum input current
+ * @pdata: driver platform data
+ * @iindpm: current value in uA.
+ *
+ * This function takes a requested maximum input current value, clamps
+ * it between the minimum supported value by the charger and a user
+ * defined maximum input value, and then writes the value to the
+ * appropriate register.
+ *
+ * Return: Returns 0 on success or error if an error occurs.
+ */
+static int bq25703_set_iindpm(struct bq257xx_chg *pdata, int iindpm)
+{
+ unsigned int reg;
+ int iindpm_max = pdata->iindpm_max;
+
+ iindpm = clamp(iindpm, BQ25703_IINDPM_MIN_UA, iindpm_max);
+
+ reg = ((iindpm - BQ25703_IINDPM_OFFSET_UA) / BQ25703_IINDPM_STEP_UA);
+
+ return regmap_write(pdata->bq->regmap, BQ25703_IIN_HOST,
+ FIELD_PREP(BQ25703_IINDPM_MASK, reg));
+}
+
+/**
+ * bq25703_get_vbat() - Get the reported voltage from the battery
+ * @pdata: driver platform data
+ * @intval: value of reported battery voltage
+ *
+ * Read value of battery voltage into intval.
+ *
+ * Return: Returns 0 on success or error if unable to read value.
+ */
+static int bq25703_get_vbat(struct bq257xx_chg *pdata, int *intval)
+{
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(pdata->bq->regmap, BQ25703_ADCVSYSVBAT, ®);
+ if (ret)
+ return ret;
+
+ reg = FIELD_GET(BQ25703_ADCVBAT_MASK, reg);
+ *intval = (reg * BQ25703_ADCVSYSVBAT_STEP) + BQ25703_ADCVSYSVBAT_OFFSET_UV;
+
+ return ret;
+}
+
+/**
+ * bq25703_hw_init() - Set all the required registers to init the charger
+ * @pdata: driver platform data
+ *
+ * Initialize the BQ25703 by first disabling the watchdog timer (which
+ * shuts off the charger in the absence of periodic writes). Then, set
+ * the charge current, charge voltage, minimum system voltage, and
+ * input current limit. Disable low power mode to allow ADCs and
+ * interrupts. Enable the ADC, start the ADC, set the ADC scale to
+ * full, and enable each individual ADC channel.
+ *
+ * Return: Returns 0 on success or error code on error.
+ */
+static int bq25703_hw_init(struct bq257xx_chg *pdata)
+{
+ struct regmap *regmap = pdata->bq->regmap;
+ int ret = 0;
+
+ regmap_update_bits(regmap, BQ25703_CHARGE_OPTION_0,
+ BQ25703_WDTMR_ADJ_MASK,
+ FIELD_PREP(BQ25703_WDTMR_ADJ_MASK,
+ BQ25703_WDTMR_DISABLE));
+
+ ret = pdata->chip->bq257xx_set_ichg(pdata, pdata->ichg_max);
+ if (ret)
+ return ret;
+
+ ret = pdata->chip->bq257xx_set_vbatreg(pdata, pdata->vbat_max);
+ if (ret)
+ return ret;
+
+ ret = bq25703_set_min_vsys(pdata, pdata->vsys_min);
+ if (ret)
+ return ret;
+
+ ret = pdata->chip->bq257xx_set_iindpm(pdata, pdata->iindpm_max);
+ if (ret)
+ return ret;
+
+ regmap_update_bits(regmap, BQ25703_CHARGE_OPTION_0,
+ BQ25703_EN_LWPWR, !BQ25703_EN_LWPWR);
+
+ regmap_update_bits(regmap, BQ25703_ADC_OPTION,
+ BQ25703_ADC_CONV_EN, BQ25703_ADC_CONV_EN);
+
+ regmap_update_bits(regmap, BQ25703_ADC_OPTION,
+ BQ25703_ADC_START, BQ25703_ADC_START);
+
+ regmap_update_bits(regmap, BQ25703_ADC_OPTION,
+ BQ25703_ADC_FULL_SCALE, BQ25703_ADC_FULL_SCALE);
+
+ regmap_update_bits(regmap, BQ25703_ADC_OPTION,
+ BQ25703_ADC_CH_MASK,
+ (BQ25703_ADC_CMPIN_EN | BQ25703_ADC_VBUS_EN |
+ BQ25703_ADC_PSYS_EN | BQ25703_ADC_IIN_EN |
+ BQ25703_ADC_IDCHG_EN | BQ25703_ADC_ICHG_EN |
+ BQ25703_ADC_VSYS_EN | BQ25703_ADC_VBAT_EN));
+
+ return ret;
+}
+
+/**
+ * bq25703_hw_shutdown() - Set registers for shutdown
+ * @pdata: driver platform data
+ *
+ * Enable low power mode for the device while in shutdown.
+ */
+static void bq25703_hw_shutdown(struct bq257xx_chg *pdata)
+{
+ regmap_update_bits(pdata->bq->regmap, BQ25703_CHARGE_OPTION_0,
+ BQ25703_EN_LWPWR, BQ25703_EN_LWPWR);
+}
+
+static int bq257xx_set_charger_property(struct power_supply *psy,
+ enum power_supply_property prop,
+ const union power_supply_propval *val)
+{
+ struct bq257xx_chg *pdata = power_supply_get_drvdata(psy);
+
+ switch (prop) {
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return pdata->chip->bq257xx_set_iindpm(pdata, val->intval);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ return pdata->chip->bq257xx_set_vbatreg(pdata, val->intval);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ return pdata->chip->bq257xx_set_ichg(pdata, val->intval);
+
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static int bq257xx_get_charger_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct bq257xx_chg *pdata = power_supply_get_drvdata(psy);
+ int ret = 0;
+
+ ret = pdata->chip->bq257xx_get_state(pdata);
+ if (ret)
+ return ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (!pdata->online)
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ else if (pdata->fast_charge || pdata->pre_charge)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ if (pdata->ov_fault || pdata->batoc_fault)
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ else if (pdata->oc_fault)
+ val->intval = POWER_SUPPLY_HEALTH_OVERCURRENT;
+ else
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = "Texas Instruments";
+ break;
+
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = pdata->online;
+ break;
+
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return bq25703_get_iindpm(pdata, &val->intval);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ return bq25703_get_chrg_volt(pdata, &val->intval);
+
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ return bq25703_get_cur(pdata, &val->intval);
+
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ return bq25703_get_vbat(pdata, &val->intval);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ return bq25703_get_ichg_cur(pdata, &val->intval);
+
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+ return bq25703_get_min_vsys(pdata, &val->intval);
+
+ case POWER_SUPPLY_PROP_USB_TYPE:
+ val->intval = pdata->usb_type;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property bq257xx_power_supply_props[] = {
+ POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN,
+ POWER_SUPPLY_PROP_USB_TYPE,
+};
+
+static int bq257xx_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property prop)
+{
+ switch (prop) {
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/**
+ * bq257xx_external_power_changed() - Handler for external power change
+ * @psy: Power supply data
+ *
+ * When the external power into the charger is changed, check the USB
+ * type so that it can be reported. Additionally, update the max input
+ * current and max charging current to the value reported if it is a
+ * USB PD charger, otherwise use the default value. Note that each time
+ * a charger is removed the max charge current register is erased, so
+ * it must be set again each time the input changes or the device will
+ * not charge.
+ */
+static void bq257xx_external_power_changed(struct power_supply *psy)
+{
+ struct bq257xx_chg *pdata = power_supply_get_drvdata(psy);
+ union power_supply_propval val;
+ int ret;
+ int imax = pdata->iindpm_max;
+
+ pdata->chip->bq257xx_get_state(pdata);
+
+ pdata->supplied = power_supply_am_i_supplied(pdata->charger);
+ if (pdata->supplied < 0)
+ return;
+
+ if (pdata->supplied == 0)
+ goto out;
+
+ ret = power_supply_get_property_from_supplier(psy,
+ POWER_SUPPLY_PROP_USB_TYPE,
+ &val);
+ if (ret)
+ return;
+
+ pdata->usb_type = val.intval;
+
+ if ((pdata->usb_type == POWER_SUPPLY_USB_TYPE_PD) ||
+ (pdata->usb_type == POWER_SUPPLY_USB_TYPE_PD_DRP) ||
+ (pdata->usb_type == POWER_SUPPLY_USB_TYPE_PD)) {
+ ret = power_supply_get_property_from_supplier(psy,
+ POWER_SUPPLY_PROP_CURRENT_MAX,
+ &val);
+ if (ret)
+ return;
+
+ if (val.intval)
+ imax = val.intval;
+ }
+
+ if (pdata->supplied) {
+ pdata->chip->bq257xx_set_ichg(pdata, imax);
+ pdata->chip->bq257xx_set_iindpm(pdata, imax);
+ pdata->chip->bq257xx_set_vbatreg(pdata, pdata->vbat_max);
+ }
+
+out:
+ power_supply_changed(psy);
+}
+
+static irqreturn_t bq257xx_irq_handler_thread(int irq, void *private)
+{
+ struct bq257xx_chg *pdata = private;
+
+ bq257xx_external_power_changed(pdata->charger);
+ return IRQ_HANDLED;
+}
+
+static const struct power_supply_desc bq257xx_power_supply_desc = {
+ .name = "bq257xx-charger",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .usb_types = BIT(POWER_SUPPLY_USB_TYPE_C) |
+ BIT(POWER_SUPPLY_USB_TYPE_PD) |
+ BIT(POWER_SUPPLY_USB_TYPE_PD_DRP) |
+ BIT(POWER_SUPPLY_USB_TYPE_PD_PPS) |
+ BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN),
+ .properties = bq257xx_power_supply_props,
+ .num_properties = ARRAY_SIZE(bq257xx_power_supply_props),
+ .get_property = bq257xx_get_charger_property,
+ .set_property = bq257xx_set_charger_property,
+ .property_is_writeable = bq257xx_property_is_writeable,
+ .external_power_changed = bq257xx_external_power_changed,
+};
+
+static const struct bq257xx_chip_info bq25703_chip_info = {
+ .bq257xx_hw_init = &bq25703_hw_init,
+ .bq257xx_hw_shutdown = &bq25703_hw_shutdown,
+ .bq257xx_get_state = &bq25703_get_state,
+ .bq257xx_set_ichg = &bq25703_set_ichg_cur,
+ .bq257xx_set_vbatreg = &bq25703_set_chrg_volt,
+ .bq257xx_set_iindpm = &bq25703_set_iindpm,
+};
+
+/**
+ * bq257xx_parse_dt() - Parse the device tree for required properties
+ * @pdata: driver platform data
+ * @psy_cfg: power supply config data
+ * @dev: device struct
+ *
+ * Read the device tree to identify the minimum system voltage, the
+ * maximum charge current, the maximum charge voltage, and the maximum
+ * input current.
+ *
+ * Return: Returns 0 on success or error code on error.
+ */
+static int bq257xx_parse_dt(struct bq257xx_chg *pdata,
+ struct power_supply_config *psy_cfg, struct device *dev)
+{
+ struct power_supply_battery_info *bat_info;
+ int ret;
+
+ ret = power_supply_get_battery_info(pdata->charger,
+ &bat_info);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Unable to get battery info\n");
+
+ if ((bat_info->voltage_min_design_uv <= 0) ||
+ (bat_info->constant_charge_voltage_max_uv <= 0) ||
+ (bat_info->constant_charge_current_max_ua <= 0))
+ return dev_err_probe(dev, -EINVAL,
+ "Required bat info missing or invalid\n");
+
+ pdata->vsys_min = bat_info->voltage_min_design_uv;
+ pdata->vbat_max = bat_info->constant_charge_voltage_max_uv;
+ pdata->ichg_max = bat_info->constant_charge_current_max_ua;
+
+ power_supply_put_battery_info(pdata->charger, bat_info);
+
+ ret = device_property_read_u32(dev,
+ "input-current-limit-microamp",
+ &pdata->iindpm_max);
+ if (ret)
+ pdata->iindpm_max = BQ25703_IINDPM_DEFAULT_UA;
+
+ return 0;
+}
+
+static int bq257xx_charger_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct bq257xx_device *bq = dev_get_drvdata(pdev->dev.parent);
+ struct bq257xx_chg *pdata;
+ struct power_supply_config psy_cfg = { };
+ int ret;
+
+ device_set_of_node_from_dev(dev, pdev->dev.parent);
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ pdata->bq = bq;
+ pdata->chip = &bq25703_chip_info;
+
+ platform_set_drvdata(pdev, pdata);
+
+ psy_cfg.drv_data = pdata;
+ psy_cfg.fwnode = dev_fwnode(dev);
+
+ pdata->charger = devm_power_supply_register(dev,
+ &bq257xx_power_supply_desc,
+ &psy_cfg);
+ if (IS_ERR(pdata->charger))
+ return dev_err_probe(dev, PTR_ERR(pdata->charger),
+ "Power supply register charger failed\n");
+
+ ret = bq257xx_parse_dt(pdata, &psy_cfg, dev);
+ if (ret)
+ return ret;
+
+ ret = pdata->chip->bq257xx_hw_init(pdata);
+ if (ret)
+ return dev_err_probe(dev, ret, "Cannot initialize the charger\n");
+
+ platform_set_drvdata(pdev, pdata);
+
+ if (bq->client->irq) {
+ ret = devm_request_threaded_irq(dev, bq->client->irq, NULL,
+ bq257xx_irq_handler_thread,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ dev_name(&bq->client->dev), pdata);
+ if (ret < 0) {
+ dev_err(dev, "get irq fail: %d\n", ret);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static void bq257xx_charger_shutdown(struct platform_device *pdev)
+{
+ struct bq257xx_chg *pdata = platform_get_drvdata(pdev);
+
+ pdata->chip->bq257xx_hw_shutdown(pdata);
+}
+
+static struct platform_driver bq257xx_chg_driver = {
+ .driver = {
+ .name = "bq257xx-charger",
+ },
+ .probe = bq257xx_charger_probe,
+ .shutdown = bq257xx_charger_shutdown,
+};
+module_platform_driver(bq257xx_chg_driver);
+
+MODULE_DESCRIPTION("bq257xx charger driver");
+MODULE_AUTHOR("Chris Morgan <macromorgan@hotmail.com>");
+MODULE_LICENSE("GPL");
--
2.43.0
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH V2 4/5] regulator: bq257xx: Add bq257xx boost regulator driver
2025-06-21 18:01 [PATCH V2 0/5] Add Texas Instruments BQ25703A Charger Chris Morgan
` (2 preceding siblings ...)
2025-06-21 18:01 ` [PATCH V2 3/5] power: supply: bq257xx: Add support for BQ257XX charger manager Chris Morgan
@ 2025-06-21 18:01 ` Chris Morgan
2025-06-22 14:11 ` kernel test robot
2025-06-21 18:01 ` [PATCH V2 5/5] arm64: dts: rockchip: Add USB and charger to Gameforce Ace Chris Morgan
4 siblings, 1 reply; 10+ messages in thread
From: Chris Morgan @ 2025-06-21 18:01 UTC (permalink / raw)
To: linux-pm
Cc: linux-rockchip, devicetree, broonie, lgirdwood, sre, heiko,
conor+dt, krzk+dt, robh, lee, Chris Morgan
From: Chris Morgan <macromorgan@hotmail.com>
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 <macromorgan@hotmail.com>
---
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 <macromorgan@hotmail.com>
+ * Based off of BQ256XX Battery Charger driver and
+ * RK808 Regulator driver.
+ */
+
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mfd/bq257xx.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+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 <macromorgan@hotmail.com>");
+MODULE_LICENSE("GPL");
--
2.43.0
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