[PATCH v4 2/4] MFD: TPS6594x: Add new PMIC device driver for TPS6594x chips

Matt Ranostay
2022-11-18T09:24:05Z

From: Keerthy <j-keerthy@ti.com>

The TPS6594x chip is a PMIC, and contains the following components:

- GPIO controller
- RTC

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Matt Ranostay <mranostay@ti.com>
---
drivers/mfd/Kconfig | 14 +++++
drivers/mfd/Makefile | 1 +
drivers/mfd/tps6594x.c | 113 +++++++++++++++++++++++++++++++++++
include/linux/mfd/tps6594x.h | 84 ++++++++++++++++++++++++++
4 files changed, 212 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 6653d03e0fe3..f19178cf9c61 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1596,6 +1596,20 @@ 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 && OF
+ 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 tps6594x.
+
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 4dd479212b3a..51d7bfcd0a27 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -101,6 +101,7 @@ 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..700e887a0966
--- /dev/null
+++ b/drivers/mfd/tps6594x.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for tps6594x PMIC chips
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+ * Author: Keerthy <j-keerthy@ti.com>
+ */
+
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps6594x.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/regmap.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 = "tps6594-gpio" },
+ { .name = "tps6594-rtc" },
+};
+
+static struct tps6594x *tps;
+
+static void tps6594x_power_off(void)
+{
+ regmap_write(tps->regmap, TPS6594X_FSM_NSLEEP_TRIGGERS,
+ TPS6594X_FSM_NSLEEP_NSLEEP1B | TPS6594X_FSM_NSLEEP_NSLEEP2B);
+
+ regmap_write(tps->regmap, TPS6594X_INT_STARTUP,
+ TPS6594X_INT_STARTUP_NPWRON_START_INT |
+ TPS6594X_INT_STARTUP_ENABLE_INT | TPS6594X_INT_STARTUP_RTC_INT |
+ TPS6594X_INT_STARTUP_SOFT_REBOOT_INT);
+
+ regmap_write(tps->regmap, TPS6594X_INT_MISC,
+ TPS6594X_INT_MISC_BIST_PASS_INT |
+ TPS6594X_INT_MISC_EXT_CLK_INT | TPS6594X_INT_MISC_TWARN_INT);
+
+ regmap_write(tps->regmap, TPS6594X_CONFIG_1,
+ TPS6594X_CONFIG_NSLEEP1_MASK | TPS6594X_CONFIG_NSLEEP2_MASK);
+
+ regmap_write(tps->regmap, TPS6594X_FSM_I2C_TRIGGERS,
+ TPS6594X_FSM_I2C_TRIGGERS_I2C0);
+}
+
+static int tps6594x_probe(struct i2c_client *client)
+{
+ struct tps6594x *ddata;
+ struct device_node *node = client->dev.of_node;
+ unsigned int otpid;
+ int ret;
+
+ ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ ddata->dev = &client->dev;
+
+ ddata->regmap = devm_regmap_init_i2c(client, &tps6594x_regmap_config);
+ if (IS_ERR(ddata->regmap))
+ return dev_err_probe(ddata->dev, PTR_ERR(ddata->regmap),
+ "Failed to initialize register map\n");
+
+ ret = regmap_read(ddata->regmap, TPS6594X_REG_DEV_REV, &otpid);
+ if (ret)
+ return dev_err_probe(ddata->dev, ret, "Failed to read OTP ID\n");
+
+ ddata->rev = otpid;
+ i2c_set_clientdata(client, ddata);
+
+ ret = mfd_add_devices(ddata->dev, PLATFORM_DEVID_AUTO, tps6594x_cells,
+ ARRAY_SIZE(tps6594x_cells), NULL, 0, NULL);
+ if (ret)
+ return dev_err_probe(ddata->dev, ret, "Failed to register cells\n");
+
+ tps = ddata;
+
+ if (of_property_read_bool(node, "ti,system-power-controller"))
+ pm_power_off = tps6594x_power_off;
+
+ return 0;
+}
+
+static const struct of_device_id of_tps6594x_match_table[] = {
+ { .compatible = "ti,tps6594", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, of_tps6594x_match_table);
+
+static const struct i2c_device_id tps6594x_id_table[] = {
+ { "tps6594", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, tps6594x_id_table);
+
+static struct i2c_driver tps6594x_driver = {
+ .driver = {
+ .name = "tps6594",
+ .of_match_table = of_tps6594x_match_table,
+ },
+ .probe_new = tps6594x_probe,
+ .id_table = tps6594x_id_table,
+};
+module_i2c_driver(tps6594x_driver);
+
+MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
+MODULE_DESCRIPTION("TPS6594X PMIC 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..5a6af0da9223
--- /dev/null
+++ b/include/linux/mfd/tps6594x.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Core driver interface for TI TPS6594x PMIC family
+ *
+ * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#ifndef __MFD_TPS6594X_H
+#define __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_INT_STARTUP_NPWRON_START_INT BIT(0)
+#define TPS6594X_INT_STARTUP_ENABLE_INT BIT(1)
+#define TPS6594X_INT_STARTUP_RTC_INT BIT(2)
+#define TPS6594X_INT_STARTUP_FSD_INT BIT(4)
+#define TPS6594X_INT_STARTUP_SOFT_REBOOT_INT BIT(5)
+
+#define TPS6594X_INT_MISC_BIST_PASS_INT BIT(0)
+#define TPS6594X_INT_MISC_EXT_CLK_INT BIT(1)
+#define TPS6594X_INT_MISC_TWARN_INT BIT(3)
+
+#define TPS6594X_CONFIG_NSLEEP1_MASK BIT(6)
+#define TPS6594X_CONFIG_NSLEEP2_MASK BIT(7)
+
+#define TPS6594X_FSM_I2C_TRIGGERS_I2C0 BIT(0)
+
+#define TPS6594X_FSM_NSLEEP_NSLEEP1B BIT(0)
+#define TPS6594X_FSM_NSLEEP_NSLEEP2B BIT(1)
+
+#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 /* __MFD_TPS6594X_H */
--
2.38.GIT