From: Josef Gajdusek Date: Tue, 22 Jul 2014 15:01:00 +0000 (+0100) Subject: staging:iio:hmc5843: Split hmc5843.c to multiple files X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=fc35a91b2e348d7aa2de177812e2e78c5276b338;p=linux-beck.git staging:iio:hmc5843: Split hmc5843.c to multiple files This patch splits hmc5843.c to multiple files - the interface-agnostic hmc5843_core.c, i2c specific hmc5843_i2c.c and header file hmc5843.h. This is another step to add support of SPI-enabled hmc5983. Signed-off-by: Josef Gajdusek Signed-off-by: Jonathan Cameron --- diff --git a/drivers/staging/iio/magnetometer/Kconfig b/drivers/staging/iio/magnetometer/Kconfig index ad88d615b642..0a27f987c201 100644 --- a/drivers/staging/iio/magnetometer/Kconfig +++ b/drivers/staging/iio/magnetometer/Kconfig @@ -4,16 +4,22 @@ menu "Magnetometer sensors" config SENSORS_HMC5843 - tristate "Honeywell HMC5843/5883/5883L 3-Axis Magnetometer" - depends on I2C + tristate select IIO_BUFFER select IIO_TRIGGERED_BUFFER + +config SENSORS_HMC5843_I2C + tristate "Honeywell HMC5843/5883/5883L 3-Axis Magnetometer (I2C)" + depends on I2C + select SENSORS_HMC5843 select REGMAP_I2C help Say Y here to add support for the Honeywell HMC5843, HMC5883 and HMC5883L 3-Axis Magnetometer (digital compass). - To compile this driver as a module, choose M here: the module - will be called hmc5843. + This driver can also be compiled as a set of modules. + If so, these modules will be created: + - hmc5843_core (core functions) + - hmc5843_i2c (support for HMC5843, HMC5883 and HMC5883L) endmenu diff --git a/drivers/staging/iio/magnetometer/Makefile b/drivers/staging/iio/magnetometer/Makefile index f9bfb2e11d7d..65baf1c4da42 100644 --- a/drivers/staging/iio/magnetometer/Makefile +++ b/drivers/staging/iio/magnetometer/Makefile @@ -2,4 +2,5 @@ # Makefile for industrial I/O Magnetometer sensors # -obj-$(CONFIG_SENSORS_HMC5843) += hmc5843.o +obj-$(CONFIG_SENSORS_HMC5843) += hmc5843_core.o +obj-$(CONFIG_SENSORS_HMC5843_I2C) += hmc5843_i2c.o diff --git a/drivers/staging/iio/magnetometer/hmc5843.h b/drivers/staging/iio/magnetometer/hmc5843.h new file mode 100644 index 000000000000..06b2712a67fd --- /dev/null +++ b/drivers/staging/iio/magnetometer/hmc5843.h @@ -0,0 +1,58 @@ +/* + * Header file for hmc5843 driver + * + * Split from hmc5843.c + * Copyright (C) Josef Gajdusek + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * */ + + +#ifndef HMC5843_CORE_H +#define HMC5843_CORE_H + +#include +#include + +#define HMC5843_CONFIG_REG_A 0x00 +#define HMC5843_CONFIG_REG_B 0x01 +#define HMC5843_MODE_REG 0x02 +#define HMC5843_DATA_OUT_MSB_REGS 0x03 +#define HMC5843_STATUS_REG 0x09 +#define HMC5843_ID_REG 0x0a +#define HMC5843_ID_END 0x0c + +enum hmc5843_ids { + HMC5843_ID, + HMC5883_ID, + HMC5883L_ID, +}; + +struct hmc5843_data { + struct device *dev; + struct mutex lock; + struct regmap *regmap; + const struct hmc5843_chip_info *variant; + __be16 buffer[8]; /* 3x 16-bit channels + padding + 64-bit timestamp */ +}; + +int hmc5843_common_probe(struct device *dev, struct regmap *regmap, + enum hmc5843_ids id); +int hmc5843_common_remove(struct device *dev); + +int hmc5843_common_suspend(struct device *dev); +int hmc5843_common_resume(struct device *dev); + +#ifdef CONFIG_PM_SLEEP +static SIMPLE_DEV_PM_OPS(hmc5843_pm_ops, + hmc5843_common_suspend, + hmc5843_common_resume); +#define HMC5843_PM_OPS (&hmc5843_pm_ops) +#else +#define HMC5843_PM_OPS NULL +#endif + +#endif /* HMC5843_CORE_H */ diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843_core.c similarity index 79% rename from drivers/staging/iio/magnetometer/hmc5843.c rename to drivers/staging/iio/magnetometer/hmc5843_core.c index 6f06f98a5260..bdeaf431db12 100644 --- a/drivers/staging/iio/magnetometer/hmc5843.c +++ b/drivers/staging/iio/magnetometer/hmc5843_core.c @@ -4,6 +4,8 @@ Support for HMC5883 and HMC5883L by Peter Meerwald . + Split to multiple files by Josef Gajdusek - 2014 + 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 @@ -20,7 +22,6 @@ */ #include -#include #include #include #include @@ -29,19 +30,7 @@ #include #include -#define HMC5843_CONFIG_REG_A 0x00 -#define HMC5843_CONFIG_REG_B 0x01 -#define HMC5843_MODE_REG 0x02 -#define HMC5843_DATA_OUT_MSB_REGS 0x03 -#define HMC5843_STATUS_REG 0x09 -#define HMC5843_ID_REG 0x0a -#define HMC5843_ID_END 0x0c - -enum hmc5843_ids { - HMC5843_ID, - HMC5883_ID, - HMC5883L_ID, -}; +#include "hmc5843.h" /* * Range gain settings in (+-)Ga @@ -121,15 +110,6 @@ struct hmc5843_chip_info { const int *regval_to_nanoscale; }; -/* Each client has this additional data */ -struct hmc5843_data { - struct i2c_client *client; - struct mutex lock; - struct regmap *regmap; - const struct hmc5843_chip_info *variant; - __be16 buffer[8]; /* 3x 16-bit channels + padding + 64-bit timestamp */ -}; - /* The lower two bits contain the current conversion mode */ static s32 hmc5843_set_mode(struct hmc5843_data *data, u8 operating_mode) { @@ -159,7 +139,7 @@ static int hmc5843_wait_measurement(struct hmc5843_data *data) } if (tries < 0) { - dev_err(&data->client->dev, "data not ready\n"); + dev_err(data->dev, "data not ready\n"); return -EIO; } @@ -524,7 +504,7 @@ static int hmc5843_init(struct hmc5843_data *data) if (ret < 0) return ret; if (id[0] != 'H' || id[1] != '4' || id[2] != '3') { - dev_err(&data->client->dev, "no HMC5843/5883/5883L sensor\n"); + dev_err(data->dev, "no HMC5843/5883/5883L sensor\n"); return -ENODEV; } @@ -550,66 +530,43 @@ static const struct iio_info hmc5843_info = { static const unsigned long hmc5843_scan_masks[] = {0x7, 0}; -static const struct regmap_range hmc5843_readable_ranges[] = { - regmap_reg_range(0, HMC5843_ID_END), -}; - -static struct regmap_access_table hmc5843_readable_table = { - .yes_ranges = hmc5843_readable_ranges, - .n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges), -}; -static const struct regmap_range hmc5843_writable_ranges[] = { - regmap_reg_range(0, HMC5843_MODE_REG), -}; - -static struct regmap_access_table hmc5843_writable_table = { - .yes_ranges = hmc5843_writable_ranges, - .n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges), -}; - -static const struct regmap_range hmc5843_volatile_ranges[] = { - regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG), -}; - -static struct regmap_access_table hmc5843_volatile_table = { - .yes_ranges = hmc5843_volatile_ranges, - .n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges), -}; - -static struct regmap_config hmc5843_regmap_config = { - .reg_bits = 8, - .val_bits = 8, - - .rd_table = &hmc5843_readable_table, - .wr_table = &hmc5843_writable_table, - .volatile_table = &hmc5843_volatile_table, +int hmc5843_common_suspend(struct device *dev) +{ + return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)), + HMC5843_MODE_CONVERSION_CONTINUOUS); +} +EXPORT_SYMBOL(hmc5843_common_suspend); - .cache_type = REGCACHE_RBTREE, -}; +int hmc5843_common_resume(struct device *dev) +{ + return hmc5843_set_mode(iio_priv(dev_get_drvdata(dev)), + HMC5843_MODE_SLEEP); +} +EXPORT_SYMBOL(hmc5843_common_resume); -static int hmc5843_probe(struct i2c_client *client, - const struct i2c_device_id *id) +int hmc5843_common_probe(struct device *dev, struct regmap *regmap, + enum hmc5843_ids id) { struct hmc5843_data *data; struct iio_dev *indio_dev; int ret; - indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); if (indio_dev == NULL) return -ENOMEM; + dev_set_drvdata(dev, indio_dev); + /* default settings at probe */ data = iio_priv(indio_dev); - data->client = client; - data->variant = &hmc5843_chip_info_tbl[id->driver_data]; - data->regmap = devm_regmap_init_i2c(client, &hmc5843_regmap_config); + data->dev = dev; + data->regmap = regmap; + data->variant = &hmc5843_chip_info_tbl[id]; mutex_init(&data->lock); - i2c_set_clientdata(client, indio_dev); + indio_dev->dev.parent = dev; indio_dev->info = &hmc5843_info; - indio_dev->name = id->name; - indio_dev->dev.parent = &client->dev; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->channels = data->variant->channels; indio_dev->num_channels = 4; @@ -634,10 +591,11 @@ buffer_cleanup: iio_triggered_buffer_cleanup(indio_dev); return ret; } +EXPORT_SYMBOL(hmc5843_common_probe); -static int hmc5843_remove(struct i2c_client *client) +int hmc5843_common_remove(struct device *dev) { - struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct iio_dev *indio_dev = dev_get_drvdata(dev); iio_device_unregister(indio_dev); iio_triggered_buffer_cleanup(indio_dev); @@ -647,58 +605,8 @@ static int hmc5843_remove(struct i2c_client *client) return 0; } - -#ifdef CONFIG_PM_SLEEP -static int hmc5843_suspend(struct device *dev) -{ - struct hmc5843_data *data = iio_priv(i2c_get_clientdata( - to_i2c_client(dev))); - - return hmc5843_set_mode(data, HMC5843_MODE_SLEEP); -} - -static int hmc5843_resume(struct device *dev) -{ - struct hmc5843_data *data = iio_priv(i2c_get_clientdata( - to_i2c_client(dev))); - - return hmc5843_set_mode(data, HMC5843_MODE_CONVERSION_CONTINUOUS); -} - -static SIMPLE_DEV_PM_OPS(hmc5843_pm_ops, hmc5843_suspend, hmc5843_resume); -#define HMC5843_PM_OPS (&hmc5843_pm_ops) -#else -#define HMC5843_PM_OPS NULL -#endif - -static const struct i2c_device_id hmc5843_id[] = { - { "hmc5843", HMC5843_ID }, - { "hmc5883", HMC5883_ID }, - { "hmc5883l", HMC5883L_ID }, - { } -}; -MODULE_DEVICE_TABLE(i2c, hmc5843_id); - -static const struct of_device_id hmc5843_of_match[] = { - { .compatible = "honeywell,hmc5843", .data = (void *)HMC5843_ID }, - { .compatible = "honeywell,hmc5883", .data = (void *)HMC5883_ID }, - { .compatible = "honeywell,hmc5883l", .data = (void *)HMC5883L_ID }, - {} -}; -MODULE_DEVICE_TABLE(of, hmc5843_of_match); - -static struct i2c_driver hmc5843_driver = { - .driver = { - .name = "hmc5843", - .pm = HMC5843_PM_OPS, - .of_match_table = hmc5843_of_match, - }, - .id_table = hmc5843_id, - .probe = hmc5843_probe, - .remove = hmc5843_remove, -}; -module_i2c_driver(hmc5843_driver); +EXPORT_SYMBOL(hmc5843_common_remove); MODULE_AUTHOR("Shubhrajyoti Datta "); -MODULE_DESCRIPTION("HMC5843/5883/5883L driver"); +MODULE_DESCRIPTION("HMC5843/5883/5883L core driver"); MODULE_LICENSE("GPL"); diff --git a/drivers/staging/iio/magnetometer/hmc5843_i2c.c b/drivers/staging/iio/magnetometer/hmc5843_i2c.c new file mode 100644 index 000000000000..5593a7d93a1b --- /dev/null +++ b/drivers/staging/iio/magnetometer/hmc5843_i2c.c @@ -0,0 +1,102 @@ +/* + * i2c driver for hmc5843/5843/5883/5883l + * + * Split from hmc5843.c + * Copyright (C) Josef Gajdusek + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * */ + +#include +#include +#include +#include +#include + +#include "hmc5843.h" + +static const struct regmap_range hmc5843_readable_ranges[] = { + regmap_reg_range(0, HMC5843_ID_END), +}; + +static struct regmap_access_table hmc5843_readable_table = { + .yes_ranges = hmc5843_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges), +}; + +static const struct regmap_range hmc5843_writable_ranges[] = { + regmap_reg_range(0, HMC5843_MODE_REG), +}; + +static struct regmap_access_table hmc5843_writable_table = { + .yes_ranges = hmc5843_writable_ranges, + .n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges), +}; + +static const struct regmap_range hmc5843_volatile_ranges[] = { + regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG), +}; + +static struct regmap_access_table hmc5843_volatile_table = { + .yes_ranges = hmc5843_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges), +}; + +static struct regmap_config hmc5843_i2c_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + + .rd_table = &hmc5843_readable_table, + .wr_table = &hmc5843_writable_table, + .volatile_table = &hmc5843_volatile_table, + + .cache_type = REGCACHE_RBTREE, +}; + +static int hmc5843_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + return hmc5843_common_probe(&client->dev, + devm_regmap_init_i2c(client, &hmc5843_i2c_regmap_config), + id->driver_data); +} + +static int hmc5843_i2c_remove(struct i2c_client *client) +{ + return hmc5843_common_remove(&client->dev); +} + +static const struct i2c_device_id hmc5843_id[] = { + { "hmc5843", HMC5843_ID }, + { "hmc5883", HMC5883_ID }, + { "hmc5883l", HMC5883L_ID }, + { } +}; +MODULE_DEVICE_TABLE(i2c, hmc5843_id); + +static const struct of_device_id hmc5843_of_match[] = { + { .compatible = "honeywell,hmc5843", .data = (void *)HMC5843_ID }, + { .compatible = "honeywell,hmc5883", .data = (void *)HMC5883_ID }, + { .compatible = "honeywell,hmc5883l", .data = (void *)HMC5883L_ID }, + {} +}; +MODULE_DEVICE_TABLE(of, hmc5843_of_match); + +static struct i2c_driver hmc5843_driver = { + .driver = { + .name = "hmc5843", + .pm = HMC5843_PM_OPS, + .of_match_table = hmc5843_of_match, + }, + .id_table = hmc5843_id, + .probe = hmc5843_i2c_probe, + .remove = hmc5843_i2c_remove, +}; +module_i2c_driver(hmc5843_driver); + +MODULE_AUTHOR("Josef Gajdusek "); +MODULE_DESCRIPTION("HMC5843/5883/5883L i2c driver"); +MODULE_LICENSE("GPL");