Initial support for the Silergy SY7636A Power Management chip. Signed-off-by: Alistair Francis <alistair@xxxxxxxxxxxxx> --- drivers/mfd/Kconfig | 9 +++++ drivers/mfd/Makefile | 1 + drivers/mfd/sy7636a.c | 72 +++++++++++++++++++++++++++++++++++++ include/linux/mfd/sy7636a.h | 45 +++++++++++++++++++++++ 4 files changed, 127 insertions(+) create mode 100644 drivers/mfd/sy7636a.c create mode 100644 include/linux/mfd/sy7636a.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 6a3fd2d75f96..b82208f0c79c 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1352,6 +1352,15 @@ config MFD_SYSCON Select this option to enable accessing system control registers via regmap. +config MFD_SY7636A + tristate "Silergy SY7636A Power Management IC" + select MFD_CORE + select REGMAP_I2C + depends on I2C + help + Select this option to enable support for the Silergy SY7636A + Power Management IC. + config MFD_DAVINCI_VOICECODEC tristate select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 8116c19d5fd4..cbe581e87fa9 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -266,6 +266,7 @@ obj-$(CONFIG_MFD_KHADAS_MCU) += khadas-mcu.o obj-$(CONFIG_MFD_ACER_A500_EC) += acer-ec-a500.o obj-$(CONFIG_MFD_QCOM_PM8008) += qcom-pm8008.o +obj-$(CONFIG_MFD_SY7636A) += sy7636a.o obj-$(CONFIG_SGI_MFD_IOC3) += ioc3.o obj-$(CONFIG_MFD_SIMPLE_MFD_I2C) += simple-mfd-i2c.o obj-$(CONFIG_MFD_INTEL_M10_BMC) += intel-m10-bmc.o diff --git a/drivers/mfd/sy7636a.c b/drivers/mfd/sy7636a.c new file mode 100644 index 000000000000..f3ff93c7395d --- /dev/null +++ b/drivers/mfd/sy7636a.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * MFD parent driver for SY7636A chip + * + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ + * + * Authors: Lars Ivar Miljeteig <lars.ivar.miljeteig@xxxxxxxxxxxxxx> + * Alistair Francis <alistair@xxxxxxxxxxxxx> + * + * Based on the lp87565 driver by Keerthy <j-keerthy@xxxxxx> + */ + +#include <linux/interrupt.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/of_device.h> + +#include <linux/mfd/sy7636a.h> + +static const struct regmap_config sy7636a_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct mfd_cell sy7636a_cells[] = { + { .name = "sy7636a-regulator", }, + { .name = "sy7636a-temperature", }, + { .name = "sy7636a-thermal", }, +}; + +static int sy7636a_probe(struct i2c_client *client) +{ + struct sy7636a *ddata; + int ret; + + ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL); + if (!ddata) + return -ENOMEM; + + ddata->regmap = devm_regmap_init_i2c(client, &sy7636a_regmap_config); + if (IS_ERR(ddata->regmap)) { + ret = PTR_ERR(ddata->regmap); + dev_err(&client->dev, + "Failed to initialize register map: %d\n", ret); + return ret; + } + + i2c_set_clientdata(client, ddata); + + return devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO, + sy7636a_cells, ARRAY_SIZE(sy7636a_cells), + NULL, 0, NULL); +} + +static const struct of_device_id of_sy7636a_match_table[] = { + { .compatible = "silergy,sy7636a", }, + {} +}; +MODULE_DEVICE_TABLE(of, of_sy7636a_match_table); + +static struct i2c_driver sy7636a_driver = { + .driver = { + .name = "sy7636a", + .of_match_table = of_sy7636a_match_table, + }, + .probe_new = sy7636a_probe, +}; +module_i2c_driver(sy7636a_driver); + +MODULE_AUTHOR("Lars Ivar Miljeteig <lars.ivar.miljeteig@xxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("Silergy SY7636A Multi-Function Device Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/mfd/sy7636a.h b/include/linux/mfd/sy7636a.h new file mode 100644 index 000000000000..5e9c537fee45 --- /dev/null +++ b/include/linux/mfd/sy7636a.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Functions to access SY3686A power management chip. + * + * Copyright (C) 2021 reMarkable AS - http://www.remarkable.com/ + */ + +#ifndef __MFD_SY7636A_H +#define __MFD_SY7636A_H + +#include <linux/i2c.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> + +#define SY7636A_REG_OPERATION_MODE_CRL 0x00 +#define SY7636A_OPERATION_MODE_CRL_VCOMCTL BIT(6) +#define SY7636A_OPERATION_MODE_CRL_ONOFF BIT(7) +#define SY7636A_REG_VCOM_ADJUST_CTRL_L 0x01 +#define SY7636A_REG_VCOM_ADJUST_CTRL_H 0x02 +#define SY7636A_REG_VCOM_ADJUST_CTRL_MASK 0x01ff +#define SY7636A_REG_VLDO_VOLTAGE_ADJULST_CTRL 0x03 +#define SY7636A_REG_POWER_ON_DELAY_TIME 0x06 +#define SY7636A_REG_FAULT_FLAG 0x07 +#define SY7636A_FAULT_FLAG_PG BIT(0) +#define SY7636A_REG_TERMISTOR_READOUT 0x08 + +#define SY7636A_REG_MAX 0x08 + +#define VCOM_MIN 0 +#define VCOM_MAX 5000 + +#define VCOM_ADJUST_CTRL_MASK 0x1ff +// Used to shift the high byte +#define VCOM_ADJUST_CTRL_SHIFT 8 +// Used to scale from VCOM_ADJUST_CTRL to mv +#define VCOM_ADJUST_CTRL_SCAL 10000 + +#define FAULT_FLAG_SHIFT 1 + +struct sy7636a { + struct regmap *regmap; +}; + +#endif /* __LINUX_MFD_SY7636A_H */ -- 2.31.1
