From: Chris Morgan <macromorgan@xxxxxxxxxxx>
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@xxxxxxxxxxx>
---
drivers/mfd/Kconfig | 11 ++++
drivers/mfd/Makefile | 1 +
drivers/mfd/bq257xx.c | 118 +++++++++++++++++++++++++++++++++++
include/linux/mfd/bq257xx.h | 120 ++++++++++++++++++++++++++++++++++++
4 files changed, 250 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 bc8be2e593b6..712951ae7341 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1537,6 +1537,17 @@ 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 02b651cd7535..90bc65d83c5f 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_CROS_EC_DEV) += cros_ec_dev.o
obj-$(CONFIG_MFD_CS42L43) += cs42l43.o
obj-$(CONFIG_MFD_CS42L43_I2C) += cs42l43-i2c.o
diff --git a/drivers/mfd/bq257xx.c b/drivers/mfd/bq257xx.c
new file mode 100644
index 000000000000..c612262f9a1e
--- /dev/null
+++ b/drivers/mfd/bq257xx.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0
+/* BQ257XX MFD Driver
+ * Copyright (C) 2024 Chris Morgan <macromorgan@xxxxxxxxxxx>
+ * Based off of BQ256XX Battery Charger Driver and
+ * Rockchip RK808 MFD Driver
+ */
+
+#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 device *dev = &client->dev;
+ struct bq257xx_device *bq;
+ const struct mfd_cell *cells;
+ int nr_cells;
+ int ret = 0;
+
+ bq = devm_kzalloc(dev, sizeof(*bq), GFP_KERNEL);
+ if (!bq)
+ return -ENOMEM;
+
+ bq->client = client;
+ bq->dev = dev;
+ bq->variant = (long)i2c_get_match_data(client);
+
+ switch (bq->variant) {
+ case BQ25703A:
+ bq->regmap_cfg = &bq25703_regmap_config;
+ cells = bq25703_cells;
+ nr_cells = ARRAY_SIZE(bq25703_cells);
+ break;
+ default:
+ dev_err(dev, "Unsupported BQ257XX ID %ld\n", bq->variant);
+ return -EINVAL;
+ }
+
+ bq->regmap = devm_regmap_init_i2c(client, bq->regmap_cfg);
+
+ if (IS_ERR(bq->regmap)) {
+ dev_err(dev, "Failed to allocate register map\n");
+ return PTR_ERR(bq->regmap);
+ }
+
+ i2c_set_clientdata(client, bq);
+
+ ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO,
+ cells, nr_cells, NULL, 0, NULL);
+ if (ret) {
+ dev_err(&client->dev, "failed to add MFD 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", .data = (void *)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 MFD driver");
+MODULE_AUTHOR("Chris Morgan <macromorgan@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/bq257xx.h b/include/linux/mfd/bq257xx.h
new file mode 100644
index 000000000000..51f6501c6441
--- /dev/null
+++ b/include/linux/mfd/bq257xx.h
@@ -0,0 +1,120 @@
+/* SPDX-License-Identifier: GPL-2.0
+ * Register definitions for TI BQ257XX
+ * Heavily based off of BQ256XX Battery Charger Driver
+ * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+#define BQ257XX_MANUFACTURER "Texas Instruments"
+
+#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 -
+ * @client: i2c client structure
+ * @regmap: register map structure
+ * @dev: device structure
+ * @regmap_cfg: device specific regmap cfg
+ */
+struct bq257xx_device {
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct device *dev;
+ const struct regmap_config *regmap_cfg;
+ long variant;
+};
--
2.34.1
