MAX6650/MAX6651 chip is a multi-function device with I2C busses. The chip includes fan-speed regulators and monitors, GPIO, and alarm.
This patch is an initial release of a MAX6650/6651 MFD driver that supports to enable the chip with its primary I2C bus that will connect the hwmon, and then the gpio devices for now. Signed-off-by: Laszlo Papp <lp...@kde.org> --- drivers/mfd/Kconfig | 11 +++++ drivers/mfd/Makefile | 1 + drivers/mfd/max665x.c | 94 +++++++++++++++++++++++++++++++++++++ include/linux/mfd/max665x-private.h | 34 ++++++++++++++ 4 files changed, 140 insertions(+) create mode 100644 drivers/mfd/max665x.c create mode 100644 include/linux/mfd/max665x-private.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 49bb445..a6c3152 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -368,6 +368,17 @@ config MFD_MAX8907 accessing the device; additional drivers must be enabled in order to use the functionality of the device. +config MFD_MAX665X + bool "Maxim Semiconductor MAX6650/MAX6651 Support" + depends on I2C + select MFD_CORE + select REGMAP_I2C + help + Say yes here to add support for Maxim Semiconductor MAX6650/MAX6651. This + is a fan speed regulator and monitor IC. This driver provides common + support for accessing the device, additional drivers must be enabled in + order to use the functionality of the device. + config MFD_MAX8925 bool "Maxim Semiconductor MAX8925 PMIC Support" depends on I2C=y diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 5aea5ef..63668c5 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -111,6 +111,7 @@ obj-$(CONFIG_MFD_DA9055) += da9055.o da9063-objs := da9063-core.o da9063-irq.o da9063-i2c.o obj-$(CONFIG_MFD_DA9063) += da9063.o +obj-$(CONFIG_MFD_MAX665X) += max665x.o obj-$(CONFIG_MFD_MAX14577) += max14577.o obj-$(CONFIG_MFD_MAX77686) += max77686.o max77686-irq.o obj-$(CONFIG_MFD_MAX77693) += max77693.o max77693-irq.o diff --git a/drivers/mfd/max665x.c b/drivers/mfd/max665x.c new file mode 100644 index 0000000..80672d7 --- /dev/null +++ b/drivers/mfd/max665x.c @@ -0,0 +1,94 @@ +/* + * Device access for MAX6650-MAX6651 + * + * Copyright(c) 2013 Polatis Ltd. + * + * Author: Laszlo Papp <laszlo.p...@polatis.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/device.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/i2c.h> + +#include <linux/mfd/max665x-private.h> + +static struct mfd_cell max665x_devs[] = { + { .name = "max6651-gpio", }, + { .name = "max6650", }, /* hwmon driver */ + {}, +}; + +static const struct regmap_config max665x_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int max665x_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct max665x_dev *max665x; + int ret; + + max665x = devm_kzalloc(&i2c->dev, sizeof(*max665x), GFP_KERNEL); + if (!max665x) + return -ENOMEM; + + i2c_set_clientdata(i2c, max665x); + max665x->dev = &i2c->dev; + max665x->i2c = i2c; + max665x->map = devm_regmap_init_i2c(i2c, &max665x_regmap_config); + if (IS_ERR(max665x->map)) { + ret = PTR_ERR(max665x->map); + dev_err(max665x->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + mutex_init(&max665x->iolock); + + ret = mfd_add_devices(max665x->dev, -1, max665x_devs, + ARRAY_SIZE(max665x_devs), + NULL, 0, NULL); + + if (ret < 0) + dev_err(max665x->dev, "failed to register child devices\n"); + + return ret; +} + +static int max665x_remove(struct i2c_client *i2c) +{ + struct max665x_dev *max665x = i2c_get_clientdata(i2c); + + mfd_remove_devices(max665x->dev); + + return 0; +} + +static struct of_device_id max665x_dt_match[] = { + { .compatible = "maxim,max665x" }, + {}, +}; +MODULE_DEVICE_TABLE(of, max665x_dt_match); + +static struct i2c_driver max665x_driver = { + .driver = { + .name = "max665x", + .owner = THIS_MODULE, + .of_match_table = max665x_dt_match, + }, + .probe = max665x_probe, + .remove = max665x_remove, +}; + +module_i2c_driver(max665x_driver); + +MODULE_AUTHOR("Laszlo Papp <laszlo.p...@polatis.com>"); +MODULE_DESCRIPTION("MAX6650-MAX6651 MFD"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/max665x-private.h b/include/linux/mfd/max665x-private.h new file mode 100644 index 0000000..293db4b --- /dev/null +++ b/include/linux/mfd/max665x-private.h @@ -0,0 +1,34 @@ +/* + * max665x-private.h - Driver for the Maxim 6650/6651 + * + * Copyright 2013 Polatis Ltd. + * + * Author: Laszlo Papp <laszlo.p...@polatis.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __LINUX_MFD_MAX665X_PRIVATE_H +#define __LINUX_MFD_MAX665X_PRIVATE_H + +#include <linux/i2c.h> +#include <linux/regmap.h> + +struct max665x_dev { + struct device *dev; + struct mutex iolock; + struct i2c_client *i2c; + struct regmap *map; + int type; +}; + +#endif -- 1.8.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/