From: Keerthy <j-keerthy@xxxxxx> The TPS6594x chip is a PMIC, and contains the following components: - Regulators - GPIO controller - RTC However initially only RTC is supported. Signed-off-by: Keerthy <j-keerthy@xxxxxx> Signed-off-by: Matt Ranostay <mranostay@xxxxxx> --- drivers/mfd/Kconfig | 14 +++++ drivers/mfd/Makefile | 1 + drivers/mfd/tps6594x.c | 106 +++++++++++++++++++++++++++++++++++ include/linux/mfd/tps6594x.h | 66 ++++++++++++++++++++++ 4 files changed, 187 insertions(+) create mode 100644 drivers/mfd/tps6594x.c create mode 100644 include/linux/mfd/tps6594x.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index abb58ab1a1a4..cfb5b3d66b76 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1547,6 +1547,20 @@ config MFD_TI_LP873X This driver can also be built as a module. If so, the module will be called lp873x. +config MFD_TPS6594X + tristate "TI TPS6594X Power Management IC" + depends on I2C + select MFD_CORE + select REGMAP_I2C + help + If you say yes here then you get support for the TPS6594X series of + Power Management Integrated Circuits (PMIC). + These include voltage regulators, RTS, configurable + General Purpose Outputs (GPO) that are used in portable devices. + + This driver can also be built as a module. If so, the module + will be called tps7694x. + config MFD_TI_LP87565 tristate "TI LP87565 Power Management IC" depends on I2C && OF diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 858cacf659d6..7ff6a8a57d55 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -105,6 +105,7 @@ obj-$(CONFIG_MFD_TPS65910) += tps65910.o obj-$(CONFIG_MFD_TPS65912) += tps65912-core.o obj-$(CONFIG_MFD_TPS65912_I2C) += tps65912-i2c.o obj-$(CONFIG_MFD_TPS65912_SPI) += tps65912-spi.o +obj-$(CONFIG_MFD_TPS6594X) += tps6594x.o obj-$(CONFIG_MENELAUS) += menelaus.o obj-$(CONFIG_TWL4030_CORE) += twl-core.o twl4030-irq.o twl6030-irq.o diff --git a/drivers/mfd/tps6594x.c b/drivers/mfd/tps6594x.c new file mode 100644 index 000000000000..519162cc1fbe --- /dev/null +++ b/drivers/mfd/tps6594x.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * tps6594x.c -- TI TPS6594x chip family multi-function driver + * + * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/ + * + * Author: Keerthy <j-keerthy@xxxxxx> + */ + +#include <linux/interrupt.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/i2c.h> +#include <linux/regmap.h> + +#include <linux/mfd/tps6594x.h> + +static const struct regmap_config tps6594x_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = TPS6594X_REG_MAX, +}; + +static const struct mfd_cell tps6594x_cells[] = { + { .name = "tps6594x-rtc", }, +}; + +static struct tps6594x *tps; + +static void tps6594x_power_off(void) +{ + regmap_write(tps->regmap, TPS6594X_FSM_NSLEEP_TRIGGERS, 0x3); + regmap_write(tps->regmap, TPS6594X_INT_STARTUP, 0xff); + regmap_write(tps->regmap, TPS6594X_INT_MISC, 0xff); + regmap_write(tps->regmap, TPS6594X_CONFIG_1, 0xc0); + regmap_write(tps->regmap, TPS6594X_FSM_I2C_TRIGGERS, 0x1); +} + +static int tps6594x_probe(struct i2c_client *client, + const struct i2c_device_id *ids) +{ + struct tps6594x *tps6594; + int ret; + unsigned int otpid; + struct device_node *node = client->dev.of_node; + + tps6594 = devm_kzalloc(&client->dev, sizeof(*tps6594), GFP_KERNEL); + if (!tps6594) + return -ENOMEM; + + tps6594->dev = &client->dev; + + tps6594->regmap = devm_regmap_init_i2c(client, &tps6594x_regmap_config); + if (IS_ERR(tps6594->regmap)) { + ret = PTR_ERR(tps6594->regmap); + dev_err(tps6594->dev, + "Failed to initialize register map: %d\n", ret); + return ret; + } + + ret = regmap_read(tps6594->regmap, TPS6594X_REG_DEV_REV, &otpid); + if (ret) { + dev_err(tps6594->dev, "Failed to read OTP ID\n"); + return ret; + } + + tps6594->rev = otpid; + + i2c_set_clientdata(client, tps6594); + + ret = mfd_add_devices(tps6594->dev, PLATFORM_DEVID_AUTO, tps6594x_cells, + ARRAY_SIZE(tps6594x_cells), NULL, 0, NULL); + + tps = tps6594; + if (of_property_read_bool(node, "ti,system-power-controller")) + pm_power_off = tps6594x_power_off; + + return ret; +} + +static const struct of_device_id of_tps6594x_match_table[] = { + { .compatible = "ti,tps6594x", }, + {} +}; +MODULE_DEVICE_TABLE(of, of_tps6594x_match_table); + +static const struct i2c_device_id tps6594x_id_table[] = { + { "tps6594x", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, tps6594x_id_table); + +static struct i2c_driver tps6594x_driver = { + .driver = { + .name = "tps6594x", + .of_match_table = of_tps6594x_match_table, + }, + .probe = tps6594x_probe, + .id_table = tps6594x_id_table, +}; +module_i2c_driver(tps6594x_driver); + +MODULE_AUTHOR("J Keerthy <j-keerthy@xxxxxx>"); +MODULE_DESCRIPTION("TPS6594X chip family Multi-Function Device driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/tps6594x.h b/include/linux/mfd/tps6594x.h new file mode 100644 index 000000000000..41349f96f013 --- /dev/null +++ b/include/linux/mfd/tps6594x.h @@ -0,0 +1,66 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * tps6594x.h -- TI TPS6594x + * + * Copyright (C) 2016 Texas Instruments Incorporated - https://www.ti.com/ + */ + +#ifndef __LINUX_MFD_TPS6594X_H +#define __LINUX_MFD_TPS6594X_H + +#include <linux/bits.h> + +/* TPS6594x chip id list */ +#define TPS6594X 0x00 + +/* All register addresses */ +#define TPS6594X_REG_DEV_REV 0x01 +#define TPS6594X_INT_STARTUP 0x65 +#define TPS6594X_INT_MISC 0x66 +#define TPS6594X_CONFIG_1 0x7d +#define TPS6594X_FSM_I2C_TRIGGERS 0x85 +#define TPS6594X_FSM_NSLEEP_TRIGGERS 0x86 + +#define TPS6594X_RTC_SECONDS 0xb5 +#define TPS6594X_RTC_MINUTES 0xb6 +#define TPS6594X_RTC_HOURS 0xb7 +#define TPS6594X_RTC_DAYS 0xb8 +#define TPS6594X_RTC_MONTHS 0xb9 +#define TPS6594X_RTC_YEARS 0xba +#define TPS6594X_RTC_WEEKS 0xbb +#define TPS6594X_ALARM_SECONDS 0xbc +#define TPS6594X_ALARM_MINUTES 0xbd +#define TPS6594X_ALARM_HOURS 0xbe +#define TPS6594X_ALARM_DAYS 0xbf +#define TPS6594X_ALARM_MONTHS 0xc0 +#define TPS6594X_ALARM_YEARS 0xc1 +#define TPS6594X_RTC_CTRL_1 0xc2 +#define TPS6594X_RTC_CTRL_2 0xc3 +#define TPS6594X_RTC_STATUS 0xc4 +#define TPS6594X_RTC_INTERRUPTS 0xc5 +#define TPS6594X_REG_MAX 0xd0 + +/* Register field definitions */ +#define TPS6594X_DEV_REV_DEV_ID 0xff + +#define TPS6594X_RTC_CTRL_REG_GET_TIME BIT(6) +#define TPS6594X_RTC_CTRL_REG_STOP_RTC BIT(0) +#define TPS6594X_RTC_INTERRUPTS_REG_IT_ALARM BIT(3) + +#define TPS6594X_RTC_STATUS_RUN BIT(1) + +/** + * struct tps6594x - state holder for the tps6594x driver + * @dev: struct device pointer for MFD device + * @rev: revision of the tps6594x + * @lock: lock guarding the data structure + * @regmap: register map of the tps6594x PMIC + * + * Device data may be used to access the TPS6594X chip + */ +struct tps6594x { + struct device *dev; + u8 rev; + struct regmap *regmap; +}; +#endif /* __LINUX_MFD_TPS6594X_H */ -- 2.36.1
