Eric Lee / smarc-ti-linux-kernel

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Commit 037b60f2ca9403d02cbee60ad0a10f3806f9dc4b

Authored by Matt Porter
Committed by Lee Jones
1 parent c6215037ac
Exists in master and in 13 other branches dlt-processor-sdk-linux-03.00.00.04, processor-sdk-linux-02.00.01, smarc-ti-linux-3.15.y, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04, ti-linux-3.15.y, ti-lsk-linux-4.1.y

mfd: Add bcm590xx pmu driver 

Add a driver for the BCM590xx PMU multi-function devices. The driver
initially supports regmap initialization and instantiation of the
voltage regulator device function of the PMU.

Signed-off-by: Matt Porter <mporter@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

Showing 4 changed files with 133 additions and 0 deletions Side-by-side Diff

... ... @@ -59,6 +59,14 @@
59 59 additional drivers must be enabled in order to use the
60 60 functionality of the device.
61 61  
  62 +config MFD_BCM590XX
  63 + tristate "Broadcom BCM590xx PMUs"
  64 + select MFD_CORE
  65 + select REGMAP_I2C
  66 + depends on I2C
  67 + help
  68 + Support for the BCM590xx PMUs from Broadcom
  69 +
62 70 config MFD_CROS_EC
63 71 tristate "ChromeOS Embedded Controller"
64 72 select MFD_CORE
drivers/mfd/Makefile
Diff comments   View file @ 037b60f
... ... @@ -8,6 +8,7 @@
8 8 obj-$(CONFIG_MFD_88PM805) += 88pm805.o 88pm80x.o
9 9 obj-$(CONFIG_MFD_SM501) += sm501.o
10 10 obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o
  11 +obj-$(CONFIG_MFD_BCM590XX) += bcm590xx.o
11 12 obj-$(CONFIG_MFD_CROS_EC) += cros_ec.o
12 13 obj-$(CONFIG_MFD_CROS_EC_I2C) += cros_ec_i2c.o
13 14 obj-$(CONFIG_MFD_CROS_EC_SPI) += cros_ec_spi.o
drivers/mfd/bcm590xx.c
Diff comments   View file @ 037b60f
  1 +/*
  2 + * Broadcom BCM590xx PMU
  3 + *
  4 + * Copyright 2014 Linaro Limited
  5 + * Author: Matt Porter <mporter@linaro.org>
  6 + *
  7 + * This program is free software; you can redistribute it and/or modify it
  8 + * under the terms of the GNU General Public License as published by the
  9 + * Free Software Foundation; either version 2 of the License, or (at your
  10 + * option) any later version.
  11 + */
  12 +
  13 +#include <linux/err.h>
  14 +#include <linux/i2c.h>
  15 +#include <linux/init.h>
  16 +#include <linux/mfd/bcm590xx.h>
  17 +#include <linux/mfd/core.h>
  18 +#include <linux/module.h>
  19 +#include <linux/moduleparam.h>
  20 +#include <linux/of.h>
  21 +#include <linux/of_device.h>
  22 +#include <linux/regmap.h>
  23 +#include <linux/slab.h>
  24 +
  25 +static const struct mfd_cell bcm590xx_devs[] = {
  26 + {
  27 + .name = "bcm590xx-vregs",
  28 + },
  29 +};
  30 +
  31 +static const struct regmap_config bcm590xx_regmap_config = {
  32 + .reg_bits = 8,
  33 + .val_bits = 8,
  34 + .max_register = BCM590XX_MAX_REGISTER,
  35 + .cache_type = REGCACHE_RBTREE,
  36 +};
  37 +
  38 +static int bcm590xx_i2c_probe(struct i2c_client *i2c,
  39 + const struct i2c_device_id *id)
  40 +{
  41 + struct bcm590xx *bcm590xx;
  42 + int ret;
  43 +
  44 + bcm590xx = devm_kzalloc(&i2c->dev, sizeof(*bcm590xx), GFP_KERNEL);
  45 + if (!bcm590xx)
  46 + return -ENOMEM;
  47 +
  48 + i2c_set_clientdata(i2c, bcm590xx);
  49 + bcm590xx->dev = &i2c->dev;
  50 + bcm590xx->i2c_client = i2c;
  51 +
  52 + bcm590xx->regmap = devm_regmap_init_i2c(i2c, &bcm590xx_regmap_config);
  53 + if (IS_ERR(bcm590xx->regmap)) {
  54 + ret = PTR_ERR(bcm590xx->regmap);
  55 + dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
  56 + return ret;
  57 + }
  58 +
  59 + ret = mfd_add_devices(&i2c->dev, -1, bcm590xx_devs,
  60 + ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL);
  61 + if (ret < 0)
  62 + dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret);
  63 +
  64 + return ret;
  65 +}
  66 +
  67 +static const struct of_device_id bcm590xx_of_match[] = {
  68 + { .compatible = "brcm,bcm59056" },
  69 + { }
  70 +};
  71 +MODULE_DEVICE_TABLE(i2c, bcm590xx_of_match);
  72 +
  73 +static const struct i2c_device_id bcm590xx_i2c_id[] = {
  74 + { "bcm59056" },
  75 + { }
  76 +};
  77 +MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id);
  78 +
  79 +static struct i2c_driver bcm590xx_i2c_driver = {
  80 + .driver = {
  81 + .name = "bcm590xx",
  82 + .owner = THIS_MODULE,
  83 + .of_match_table = of_match_ptr(bcm590xx_of_match),
  84 + },
  85 + .probe = bcm590xx_i2c_probe,
  86 + .id_table = bcm590xx_i2c_id,
  87 +};
  88 +module_i2c_driver(bcm590xx_i2c_driver);
  89 +
  90 +MODULE_AUTHOR("Matt Porter <mporter@linaro.org>");
  91 +MODULE_DESCRIPTION("BCM590xx multi-function driver");
  92 +MODULE_LICENSE("GPL v2");
  93 +MODULE_ALIAS("platform:bcm590xx");
include/linux/mfd/bcm590xx.h
Diff comments   View file @ 037b60f
  1 +/*
  2 + * Broadcom BCM590xx PMU
  3 + *
  4 + * Copyright 2014 Linaro Limited
  5 + * Author: Matt Porter <mporter@linaro.org>
  6 + *
  7 + * This program is free software; you can redistribute it and/or modify it
  8 + * under the terms of the GNU General Public License as published by the
  9 + * Free Software Foundation; either version 2 of the License, or (at your
  10 + * option) any later version.
  11 + *
  12 + */
  13 +
  14 +#ifndef __LINUX_MFD_BCM590XX_H
  15 +#define __LINUX_MFD_BCM590XX_H
  16 +
  17 +#include <linux/device.h>
  18 +#include <linux/i2c.h>
  19 +#include <linux/regmap.h>
  20 +
  21 +/* max register address */
  22 +#define BCM590XX_MAX_REGISTER 0xe7
  23 +
  24 +struct bcm590xx {
  25 + struct device *dev;
  26 + struct i2c_client *i2c_client;
  27 + struct regmap *regmap;
  28 + unsigned int id;
  29 +};
  30 +
  31 +#endif /* __LINUX_MFD_BCM590XX_H */