Add a driver for the BCM59056 PMU multi-function device. The driver initially supports regmap initialization and instantiation of the voltage regulator device function of the PMU.
Signed-off-by: Matt Porter <[email protected]> Reviewed-by: Tim Kryger <[email protected]> Reviewed-by: Markus Mayer <[email protected]> --- drivers/mfd/Kconfig | 8 +++ drivers/mfd/Makefile | 1 + drivers/mfd/bcm59056.c | 119 +++++++++++++++++++++++++++++++++++++++++++ include/linux/mfd/bcm59056.h | 35 +++++++++++++ 4 files changed, 163 insertions(+) create mode 100644 drivers/mfd/bcm59056.c create mode 100644 include/linux/mfd/bcm59056.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 49bb445..36e96c2 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -59,6 +59,14 @@ config MFD_AAT2870_CORE additional drivers must be enabled in order to use the functionality of the device. +config MFD_BCM59056 + bool "Broadcom BCM59056 PMU" + select MFD_CORE + select REGMAP_I2C + depends on I2C=y + help + Support for the BCM59056 PMU from Broadcom + config MFD_CROS_EC tristate "ChromeOS Embedded Controller" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 5aea5ef..8d7e110 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_MFD_88PM800) += 88pm800.o 88pm80x.o obj-$(CONFIG_MFD_88PM805) += 88pm805.o 88pm80x.o obj-$(CONFIG_MFD_SM501) += sm501.o obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o +obj-$(CONFIG_MFD_BCM59056) += bcm59056.o obj-$(CONFIG_MFD_CROS_EC) += cros_ec.o obj-$(CONFIG_MFD_CROS_EC_I2C) += cros_ec_i2c.o obj-$(CONFIG_MFD_CROS_EC_SPI) += cros_ec_spi.o diff --git a/drivers/mfd/bcm59056.c b/drivers/mfd/bcm59056.c new file mode 100644 index 0000000..f193bfb --- /dev/null +++ b/drivers/mfd/bcm59056.c @@ -0,0 +1,119 @@ +/* + * Broadcom BCM59056 PMU + * + * Copyright 2014 Linaro Limited + * Author: Matt Porter <[email protected]> + * + * 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/err.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/mfd/bcm59056.h> +#include <linux/mfd/core.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +static struct mfd_cell bcm59056s[] = { + { + .name = "bcm59056-pmu", + }, +}; + +static const struct regmap_config bcm59056_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = BCM59056_MAX_REGISTER - 1, + .cache_type = REGCACHE_RBTREE, +}; + +static int bcm59056_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct bcm59056 *bcm59056; + int chip_id = id->driver_data; + int ret = 0; + + bcm59056 = devm_kzalloc(&i2c->dev, sizeof(*bcm59056), GFP_KERNEL); + if (!bcm59056) + return -ENOMEM; + + i2c_set_clientdata(i2c, bcm59056); + bcm59056->dev = &i2c->dev; + bcm59056->i2c_client = i2c; + bcm59056->id = chip_id; + + bcm59056->regmap = devm_regmap_init_i2c(i2c, &bcm59056_regmap_config); + if (IS_ERR(bcm59056->regmap)) { + ret = PTR_ERR(bcm59056->regmap); + dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); + return ret; + } + + ret = mfd_add_devices(bcm59056->dev, -1, + bcm59056s, ARRAY_SIZE(bcm59056s), + NULL, 0, NULL); + if (ret < 0) + dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret); + + return ret; +} + +static int bcm59056_i2c_remove(struct i2c_client *i2c) +{ + struct bcm59056 *bcm59056 = i2c_get_clientdata(i2c); + + mfd_remove_devices(bcm59056->dev); + + return 0; +} + +static const struct of_device_id bcm59056_of_match[] = { + { .compatible = "brcm,bcm59056", .data = (void *)BCM59056 }, + { } +}; + +static const struct i2c_device_id bcm59056_i2c_id[] = { + { "bcm59056", BCM59056 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, bcm59056_i2c_id); + +static struct i2c_driver bcm59056_i2c_driver = { + .driver = { + .name = "bcm59056", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(bcm59056_of_match), + }, + .probe = bcm59056_i2c_probe, + .remove = bcm59056_i2c_remove, + .id_table = bcm59056_i2c_id, +}; + +static int __init bcm59056_init(void) +{ + return i2c_add_driver(&bcm59056_i2c_driver); +} +subsys_initcall(bcm59056_init); + +static void __exit bcm59056_exit(void) +{ + i2c_del_driver(&bcm59056_i2c_driver); +} +module_exit(bcm59056_exit); + +MODULE_AUTHOR("Matt Porter <[email protected]>"); +MODULE_DESCRIPTION("BCM59056 multi-function driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:bcm59056"); diff --git a/include/linux/mfd/bcm59056.h b/include/linux/mfd/bcm59056.h new file mode 100644 index 0000000..967395d --- /dev/null +++ b/include/linux/mfd/bcm59056.h @@ -0,0 +1,35 @@ +/* + * Broadcom BCM59056 PMU + * + * Copyright 2014 Linaro Limited + * Author: Matt Porter <[email protected]> + * + * 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. + * + */ + +#ifndef __LINUX_MFD_BCM59056_H +#define __LINUX_MFD_BCM59056_H + +#include <linux/device.h> +#include <linux/i2c.h> +#include <linux/regmap.h> + +/* chip id */ +#define BCM59056 0 + +/* max register address */ +#define BCM59056_MAX_REGISTER 0xe8 + +/* bcm59056 chip access */ +struct bcm59056 { + struct device *dev; + struct i2c_client *i2c_client; + struct regmap *regmap; + unsigned int id; +}; + +#endif /* __LINUX_MFD_BCM59056_H */ -- 1.8.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
