On Thu, 08 Jul 2021, Alistair Francis wrote: > 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 | 81 +++++++++++++++++++++++++++++++++++++ > include/linux/mfd/sy7636a.h | 47 +++++++++++++++++++++ > 4 files changed, 138 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..7b59aa0fd3f2 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 chip" s/chip/IC/ > + select MFD_CORE > + select REGMAP_I2C > + depends on I2C > + help > + Select this option to enable support for the Silergy SY7636A > + Power Management chip. As above. > 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..345892e11221 > --- /dev/null > +++ b/drivers/mfd/sy7636a.c > @@ -0,0 +1,81 @@ > +// 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> Only C++ comments for the SPDX please. > +// 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", }, > +}; If you put these in the Device Tree, you can use "simple-mfd-i2c" > +static const struct of_device_id of_sy7636a_match_table[] = { > + { .compatible = "silergy,sy7636a", }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, of_sy7636a_match_table); Place this near the i2c_device_id table please. > +static int sy7636a_probe(struct i2c_client *client, > + const struct i2c_device_id *ids) > +{ > + struct sy7636a *sy7636a; Please call this ddata. > + int ret; > + > + sy7636a = devm_kzalloc(&client->dev, sizeof(*sy7636a), GFP_KERNEL); > + if (!sy7636a) > + return -ENOMEM; > + > + sy7636a->dev = &client->dev; What are you using 'dev' for? You can normally just use 'dev->parent' from the child device. > + sy7636a->regmap = devm_regmap_init_i2c(client, &sy7636a_regmap_config); > + if (IS_ERR(sy7636a->regmap)) { > + ret = PTR_ERR(sy7636a->regmap); > + dev_err(sy7636a->dev, > + "Failed to initialize register map: %d\n", ret); > + return ret; > + } > + > + i2c_set_clientdata(client, sy7636a); > + > + return devm_mfd_add_devices(sy7636a->dev, PLATFORM_DEVID_AUTO, > + sy7636a_cells, ARRAY_SIZE(sy7636a_cells), > + NULL, 0, NULL); > +} > + > +static const struct i2c_device_id sy7636a_id_table[] = { > + { "sy7636a", 0 }, > + { }, > +}; > +MODULE_DEVICE_TABLE(i2c, sy7636a_id_table); Use probe_new below, then you can omit this table. > +static struct i2c_driver sy7636a_driver = { > + .driver = { > + .name = "sy7636a", > + .of_match_table = of_sy7636a_match_table, > + }, > + .probe = sy7636a_probe, > + .id_table = sy7636a_id_table, > +}; > +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..b6845a3572b8 > --- /dev/null > +++ b/include/linux/mfd/sy7636a.h > @@ -0,0 +1,47 @@ > +/* 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 device *dev; > + struct regmap *regmap; > + struct gpio_desc *pgood_gpio; This looks unused? > +}; > + > +#endif /* __LINUX_MFD_SY7636A_H */ -- Lee Jones [李琼斯] Senior Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog
