On 15/04/16 15:13, Daniel Baluta wrote:
> This is useful for easily adding SPI support in later patches.
>
> Now bmc150_magn exports core functions to be used by I2C/SPI drivers
> instances. For the moment only I2C driver is supported.
>
> Signed-off-by: Daniel Baluta <daniel.baluta@xxxxxxxxx>
This looks good to me - all mechanistic stuff so I doubt anything nasty
has snuck in. Ideally I'd like an Ack from Irina on this but it'll probably
be in my testing tree for a few days so I can add one if it comes in.
Applied to the togreg branch of iio.git - pushed out as testing for the
autobuilders to mess with it.
Thanks,
Jonathan
> ---
> drivers/iio/magnetometer/Kconfig | 17 ++--
> drivers/iio/magnetometer/Makefile | 2 +
> drivers/iio/magnetometer/bmc150_magn.c | 155 ++++++++++++-----------------
> drivers/iio/magnetometer/bmc150_magn.h | 11 ++
> drivers/iio/magnetometer/bmc150_magn_i2c.c | 77 ++++++++++++++
> 5 files changed, 163 insertions(+), 99 deletions(-)
> create mode 100644 drivers/iio/magnetometer/bmc150_magn.h
> create mode 100644 drivers/iio/magnetometer/bmc150_magn_i2c.c
>
> diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig
> index 021dc53..e916005 100644
> --- a/drivers/iio/magnetometer/Kconfig
> +++ b/drivers/iio/magnetometer/Kconfig
> @@ -25,22 +25,25 @@ config AK09911
> Deprecated: AK09911 is now supported by AK8975 driver.
>
> config BMC150_MAGN
> - tristate "Bosch BMC150 Magnetometer Driver"
> - depends on I2C
> - select REGMAP_I2C
> + tristate
> select IIO_BUFFER
> select IIO_TRIGGERED_BUFFER
> - help
> - Say yes here to build support for the BMC150 magnetometer.
>
> - Currently this only supports the device via an i2c interface.
> +config BMC150_MAGN_I2C
> + tristate "Bosch BMC150 I2C Magnetometer Driver"
> + depends on I2C
> + select BMC150_MAGN
> + select REGMAP_I2C
> + help
> + Say yes here to build support for the BMC150 magnetometer with
> + I2C interface.
>
> This is a combo module with both accelerometer and magnetometer.
> This driver is only implementing magnetometer part, which has
> its own address and register map.
>
> To compile this driver as a module, choose M here: the module will be
> - called bmc150_magn.
> + called bmc150_magn_i2c.
>
> config MAG3110
> tristate "Freescale MAG3110 3-Axis Magnetometer"
> diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/Makefile
> index dd03fe5..5647773 100644
> --- a/drivers/iio/magnetometer/Makefile
> +++ b/drivers/iio/magnetometer/Makefile
> @@ -5,6 +5,8 @@
> # When adding new entries keep the list in alphabetical order
> obj-$(CONFIG_AK8975) += ak8975.o
> obj-$(CONFIG_BMC150_MAGN) += bmc150_magn.o
> +obj-$(CONFIG_BMC150_MAGN_I2C) += bmc150_magn_i2c.o
> +
> obj-$(CONFIG_MAG3110) += mag3110.o
> obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o
> obj-$(CONFIG_MMC35240) += mmc35240.o
> diff --git a/drivers/iio/magnetometer/bmc150_magn.c b/drivers/iio/magnetometer/bmc150_magn.c
> index 0e9da18..d104fb8 100644
> --- a/drivers/iio/magnetometer/bmc150_magn.c
> +++ b/drivers/iio/magnetometer/bmc150_magn.c
> @@ -34,6 +34,8 @@
> #include <linux/iio/triggered_buffer.h>
> #include <linux/regmap.h>
>
> +#include "bmc150_magn.h"
> +
> #define BMC150_MAGN_DRV_NAME "bmc150_magn"
> #define BMC150_MAGN_IRQ_NAME "bmc150_magn_event"
>
> @@ -134,7 +136,7 @@ struct bmc150_magn_trim_regs {
> } __packed;
>
> struct bmc150_magn_data {
> - struct i2c_client *client;
> + struct device *dev;
> /*
> * 1. Protect this structure.
> * 2. Serialize sequences that power on/off the device and access HW.
> @@ -146,6 +148,7 @@ struct bmc150_magn_data {
> struct iio_trigger *dready_trig;
> bool dready_trigger_on;
> int max_odr;
> + int irq;
> };
>
> static const struct {
> @@ -215,7 +218,7 @@ static bool bmc150_magn_is_volatile_reg(struct device *dev, unsigned int reg)
> }
> }
>
> -static const struct regmap_config bmc150_magn_regmap_config = {
> +const struct regmap_config bmc150_magn_regmap_config = {
> .reg_bits = 8,
> .val_bits = 8,
>
> @@ -225,6 +228,7 @@ static const struct regmap_config bmc150_magn_regmap_config = {
> .writeable_reg = bmc150_magn_is_writeable_reg,
> .volatile_reg = bmc150_magn_is_volatile_reg,
> };
> +EXPORT_SYMBOL(bmc150_magn_regmap_config);
>
> static int bmc150_magn_set_power_mode(struct bmc150_magn_data *data,
> enum bmc150_magn_power_modes mode,
> @@ -263,17 +267,17 @@ static int bmc150_magn_set_power_state(struct bmc150_magn_data *data, bool on)
> int ret;
>
> if (on) {
> - ret = pm_runtime_get_sync(&data->client->dev);
> + ret = pm_runtime_get_sync(data->dev);
> } else {
> - pm_runtime_mark_last_busy(&data->client->dev);
> - ret = pm_runtime_put_autosuspend(&data->client->dev);
> + pm_runtime_mark_last_busy(data->dev);
> + ret = pm_runtime_put_autosuspend(data->dev);
> }
>
> if (ret < 0) {
> - dev_err(&data->client->dev,
> + dev_err(data->dev,
> "failed to change power state to %d\n", on);
> if (on)
> - pm_runtime_put_noidle(&data->client->dev);
> + pm_runtime_put_noidle(data->dev);
>
> return ret;
> }
> @@ -350,7 +354,7 @@ static int bmc150_magn_set_max_odr(struct bmc150_magn_data *data, int rep_xy,
> /* the maximum selectable read-out frequency from datasheet */
> max_odr = 1000000 / (145 * rep_xy + 500 * rep_z + 980);
> if (odr > max_odr) {
> - dev_err(&data->client->dev,
> + dev_err(data->dev,
> "Can't set oversampling with sampling freq %d\n",
> odr);
> return -EINVAL;
> @@ -684,27 +688,27 @@ static int bmc150_magn_init(struct bmc150_magn_data *data)
> ret = bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_SUSPEND,
> false);
> if (ret < 0) {
> - dev_err(&data->client->dev,
> + dev_err(data->dev,
> "Failed to bring up device from suspend mode\n");
> return ret;
> }
>
> ret = regmap_read(data->regmap, BMC150_MAGN_REG_CHIP_ID, &chip_id);
> if (ret < 0) {
> - dev_err(&data->client->dev, "Failed reading chip id\n");
> + dev_err(data->dev, "Failed reading chip id\n");
> goto err_poweroff;
> }
> if (chip_id != BMC150_MAGN_CHIP_ID_VAL) {
> - dev_err(&data->client->dev, "Invalid chip id 0x%x\n", chip_id);
> + dev_err(data->dev, "Invalid chip id 0x%x\n", chip_id);
> ret = -ENODEV;
> goto err_poweroff;
> }
> - dev_dbg(&data->client->dev, "Chip id %x\n", chip_id);
> + dev_dbg(data->dev, "Chip id %x\n", chip_id);
>
> preset = bmc150_magn_presets_table[BMC150_MAGN_DEFAULT_PRESET];
> ret = bmc150_magn_set_odr(data, preset.odr);
> if (ret < 0) {
> - dev_err(&data->client->dev, "Failed to set ODR to %d\n",
> + dev_err(data->dev, "Failed to set ODR to %d\n",
> preset.odr);
> goto err_poweroff;
> }
> @@ -712,7 +716,7 @@ static int bmc150_magn_init(struct bmc150_magn_data *data)
> ret = regmap_write(data->regmap, BMC150_MAGN_REG_REP_XY,
> BMC150_MAGN_REPXY_TO_REGVAL(preset.rep_xy));
> if (ret < 0) {
> - dev_err(&data->client->dev, "Failed to set REP XY to %d\n",
> + dev_err(data->dev, "Failed to set REP XY to %d\n",
> preset.rep_xy);
> goto err_poweroff;
> }
> @@ -720,7 +724,7 @@ static int bmc150_magn_init(struct bmc150_magn_data *data)
> ret = regmap_write(data->regmap, BMC150_MAGN_REG_REP_Z,
> BMC150_MAGN_REPZ_TO_REGVAL(preset.rep_z));
> if (ret < 0) {
> - dev_err(&data->client->dev, "Failed to set REP Z to %d\n",
> + dev_err(data->dev, "Failed to set REP Z to %d\n",
> preset.rep_z);
> goto err_poweroff;
> }
> @@ -733,7 +737,7 @@ static int bmc150_magn_init(struct bmc150_magn_data *data)
> ret = bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_NORMAL,
> true);
> if (ret < 0) {
> - dev_err(&data->client->dev, "Failed to power on device\n");
> + dev_err(data->dev, "Failed to power on device\n");
> goto err_poweroff;
> }
>
> @@ -842,41 +846,33 @@ static const char *bmc150_magn_match_acpi_device(struct device *dev)
> return dev_name(dev);
> }
>
> -static int bmc150_magn_probe(struct i2c_client *client,
> - const struct i2c_device_id *id)
> +int bmc150_magn_probe(struct device *dev, struct regmap *regmap,
> + int irq, const char *name)
> {
> struct bmc150_magn_data *data;
> struct iio_dev *indio_dev;
> - const char *name = NULL;
> int ret;
>
> - indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
> + indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
> if (!indio_dev)
> return -ENOMEM;
>
> data = iio_priv(indio_dev);
> - i2c_set_clientdata(client, indio_dev);
> - data->client = client;
> + dev_set_drvdata(dev, indio_dev);
> + data->regmap = regmap;
> + data->irq = irq;
> + data->dev = dev;
>
> - if (id)
> - name = id->name;
> - else if (ACPI_HANDLE(&client->dev))
> - name = bmc150_magn_match_acpi_device(&client->dev);
> - else
> - return -ENOSYS;
> + if (!name && ACPI_HANDLE(dev))
> + name = bmc150_magn_match_acpi_device(dev);
>
> mutex_init(&data->mutex);
> - data->regmap = devm_regmap_init_i2c(client, &bmc150_magn_regmap_config);
> - if (IS_ERR(data->regmap)) {
> - dev_err(&client->dev, "Failed to allocate register map\n");
> - return PTR_ERR(data->regmap);
> - }
>
> ret = bmc150_magn_init(data);
> if (ret < 0)
> return ret;
>
> - indio_dev->dev.parent = &client->dev;
> + indio_dev->dev.parent = dev;
> indio_dev->channels = bmc150_magn_channels;
> indio_dev->num_channels = ARRAY_SIZE(bmc150_magn_channels);
> indio_dev->available_scan_masks = bmc150_magn_scan_masks;
> @@ -884,35 +880,34 @@ static int bmc150_magn_probe(struct i2c_client *client,
> indio_dev->modes = INDIO_DIRECT_MODE;
> indio_dev->info = &bmc150_magn_info;
>
> - if (client->irq > 0) {
> - data->dready_trig = devm_iio_trigger_alloc(&client->dev,
> + if (irq > 0) {
> + data->dready_trig = devm_iio_trigger_alloc(dev,
> "%s-dev%d",
> indio_dev->name,
> indio_dev->id);
> if (!data->dready_trig) {
> ret = -ENOMEM;
> - dev_err(&client->dev, "iio trigger alloc failed\n");
> + dev_err(dev, "iio trigger alloc failed\n");
> goto err_poweroff;
> }
>
> - data->dready_trig->dev.parent = &client->dev;
> + data->dready_trig->dev.parent = dev;
> data->dready_trig->ops = &bmc150_magn_trigger_ops;
> iio_trigger_set_drvdata(data->dready_trig, indio_dev);
> ret = iio_trigger_register(data->dready_trig);
> if (ret) {
> - dev_err(&client->dev, "iio trigger register failed\n");
> + dev_err(dev, "iio trigger register failed\n");
> goto err_poweroff;
> }
>
> - ret = request_threaded_irq(client->irq,
> + ret = request_threaded_irq(irq,
> iio_trigger_generic_data_rdy_poll,
> NULL,
> IRQF_TRIGGER_RISING | IRQF_ONESHOT,
> BMC150_MAGN_IRQ_NAME,
> data->dready_trig);
> if (ret < 0) {
> - dev_err(&client->dev, "request irq %d failed\n",
> - client->irq);
> + dev_err(dev, "request irq %d failed\n", irq);
> goto err_trigger_unregister;
> }
> }
> @@ -922,34 +917,33 @@ static int bmc150_magn_probe(struct i2c_client *client,
> bmc150_magn_trigger_handler,
> &bmc150_magn_buffer_setup_ops);
> if (ret < 0) {
> - dev_err(&client->dev,
> - "iio triggered buffer setup failed\n");
> + dev_err(dev, "iio triggered buffer setup failed\n");
> goto err_free_irq;
> }
>
> - ret = pm_runtime_set_active(&client->dev);
> + ret = pm_runtime_set_active(dev);
> if (ret)
> goto err_buffer_cleanup;
>
> - pm_runtime_enable(&client->dev);
> - pm_runtime_set_autosuspend_delay(&client->dev,
> + pm_runtime_enable(dev);
> + pm_runtime_set_autosuspend_delay(dev,
> BMC150_MAGN_AUTO_SUSPEND_DELAY_MS);
> - pm_runtime_use_autosuspend(&client->dev);
> + pm_runtime_use_autosuspend(dev);
>
> ret = iio_device_register(indio_dev);
> if (ret < 0) {
> - dev_err(&client->dev, "unable to register iio device\n");
> + dev_err(dev, "unable to register iio device\n");
> goto err_buffer_cleanup;
> }
>
> - dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
> + dev_dbg(dev, "Registered device %s\n", name);
> return 0;
>
> err_buffer_cleanup:
> iio_triggered_buffer_cleanup(indio_dev);
> err_free_irq:
> - if (client->irq > 0)
> - free_irq(client->irq, data->dready_trig);
> + if (irq > 0)
> + free_irq(irq, data->dready_trig);
> err_trigger_unregister:
> if (data->dready_trig)
> iio_trigger_unregister(data->dready_trig);
> @@ -957,22 +951,23 @@ err_poweroff:
> bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_SUSPEND, true);
> return ret;
> }
> +EXPORT_SYMBOL(bmc150_magn_probe);
>
> -static int bmc150_magn_remove(struct i2c_client *client)
> +int bmc150_magn_remove(struct device *dev)
> {
> - struct iio_dev *indio_dev = i2c_get_clientdata(client);
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> struct bmc150_magn_data *data = iio_priv(indio_dev);
>
> iio_device_unregister(indio_dev);
>
> - pm_runtime_disable(&client->dev);
> - pm_runtime_set_suspended(&client->dev);
> - pm_runtime_put_noidle(&client->dev);
> + pm_runtime_disable(dev);
> + pm_runtime_set_suspended(dev);
> + pm_runtime_put_noidle(dev);
>
> iio_triggered_buffer_cleanup(indio_dev);
>
> - if (client->irq > 0)
> - free_irq(data->client->irq, data->dready_trig);
> + if (data->irq > 0)
> + free_irq(data->irq, data->dready_trig);
>
> if (data->dready_trig)
> iio_trigger_unregister(data->dready_trig);
> @@ -983,11 +978,12 @@ static int bmc150_magn_remove(struct i2c_client *client)
>
> return 0;
> }
> +EXPORT_SYMBOL(bmc150_magn_remove);
>
> #ifdef CONFIG_PM
> static int bmc150_magn_runtime_suspend(struct device *dev)
> {
> - struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> struct bmc150_magn_data *data = iio_priv(indio_dev);
> int ret;
>
> @@ -996,7 +992,7 @@ static int bmc150_magn_runtime_suspend(struct device *dev)
> true);
> mutex_unlock(&data->mutex);
> if (ret < 0) {
> - dev_err(&data->client->dev, "powering off device failed\n");
> + dev_err(dev, "powering off device failed\n");
> return ret;
> }
> return 0;
> @@ -1007,7 +1003,7 @@ static int bmc150_magn_runtime_suspend(struct device *dev)
> */
> static int bmc150_magn_runtime_resume(struct device *dev)
> {
> - struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> struct bmc150_magn_data *data = iio_priv(indio_dev);
>
> return bmc150_magn_set_power_mode(data, BMC150_MAGN_POWER_MODE_NORMAL,
> @@ -1018,7 +1014,7 @@ static int bmc150_magn_runtime_resume(struct device *dev)
> #ifdef CONFIG_PM_SLEEP
> static int bmc150_magn_suspend(struct device *dev)
> {
> - struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> struct bmc150_magn_data *data = iio_priv(indio_dev);
> int ret;
>
> @@ -1032,7 +1028,7 @@ static int bmc150_magn_suspend(struct device *dev)
>
> static int bmc150_magn_resume(struct device *dev)
> {
> - struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> struct bmc150_magn_data *data = iio_priv(indio_dev);
> int ret;
>
> @@ -1045,38 +1041,13 @@ static int bmc150_magn_resume(struct device *dev)
> }
> #endif
>
> -static const struct dev_pm_ops bmc150_magn_pm_ops = {
> +const struct dev_pm_ops bmc150_magn_pm_ops = {
> SET_SYSTEM_SLEEP_PM_OPS(bmc150_magn_suspend, bmc150_magn_resume)
> SET_RUNTIME_PM_OPS(bmc150_magn_runtime_suspend,
> bmc150_magn_runtime_resume, NULL)
> };
> -
> -static const struct acpi_device_id bmc150_magn_acpi_match[] = {
> - {"BMC150B", 0},
> - {"BMC156B", 0},
> - {},
> -};
> -MODULE_DEVICE_TABLE(acpi, bmc150_magn_acpi_match);
> -
> -static const struct i2c_device_id bmc150_magn_id[] = {
> - {"bmc150_magn", 0},
> - {"bmc156_magn", 0},
> - {},
> -};
> -MODULE_DEVICE_TABLE(i2c, bmc150_magn_id);
> -
> -static struct i2c_driver bmc150_magn_driver = {
> - .driver = {
> - .name = BMC150_MAGN_DRV_NAME,
> - .acpi_match_table = ACPI_PTR(bmc150_magn_acpi_match),
> - .pm = &bmc150_magn_pm_ops,
> - },
> - .probe = bmc150_magn_probe,
> - .remove = bmc150_magn_remove,
> - .id_table = bmc150_magn_id,
> -};
> -module_i2c_driver(bmc150_magn_driver);
> +EXPORT_SYMBOL(bmc150_magn_pm_ops);
>
> MODULE_AUTHOR("Irina Tirdea <irina.tirdea@xxxxxxxxx>");
> MODULE_LICENSE("GPL v2");
> -MODULE_DESCRIPTION("BMC150 magnetometer driver");
> +MODULE_DESCRIPTION("BMC150 magnetometer core driver");
> diff --git a/drivers/iio/magnetometer/bmc150_magn.h b/drivers/iio/magnetometer/bmc150_magn.h
> new file mode 100644
> index 0000000..9a8e268
> --- /dev/null
> +++ b/drivers/iio/magnetometer/bmc150_magn.h
> @@ -0,0 +1,11 @@
> +#ifndef _BMC150_MAGN_H_
> +#define _BMC150_MAGN_H_
> +
> +extern const struct regmap_config bmc150_magn_regmap_config;
> +extern const struct dev_pm_ops bmc150_magn_pm_ops;
> +
> +int bmc150_magn_probe(struct device *dev, struct regmap *regmap, int irq,
> + const char *name);
> +int bmc150_magn_remove(struct device *dev);
> +
> +#endif /* _BMC150_MAGN_H_ */
> diff --git a/drivers/iio/magnetometer/bmc150_magn_i2c.c b/drivers/iio/magnetometer/bmc150_magn_i2c.c
> new file mode 100644
> index 0000000..eddc7f0
> --- /dev/null
> +++ b/drivers/iio/magnetometer/bmc150_magn_i2c.c
> @@ -0,0 +1,77 @@
> +/*
> + * 3-axis magnetometer driver supporting following I2C Bosch-Sensortec chips:
> + * - BMC150
> + * - BMC156
> + *
> + * Copyright (c) 2016, Intel Corporation.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope 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.
> + */
> +#include <linux/device.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/acpi.h>
> +#include <linux/regmap.h>
> +
> +#include "bmc150_magn.h"
> +
> +static int bmc150_magn_i2c_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct regmap *regmap;
> + const char *name = NULL;
> +
> + regmap = devm_regmap_init_i2c(client, &bmc150_magn_regmap_config);
> + if (IS_ERR(regmap)) {
> + dev_err(&client->dev, "Failed to initialize i2c regmap\n");
> + return PTR_ERR(regmap);
> + }
> +
> + if (id)
> + name = id->name;
> +
> + return bmc150_magn_probe(&client->dev, regmap, client->irq, name);
> +}
> +
> +static int bmc150_magn_i2c_remove(struct i2c_client *client)
> +{
> + return bmc150_magn_remove(&client->dev);
> +}
> +
> +static const struct acpi_device_id bmc150_magn_acpi_match[] = {
> + {"BMC150B", 0},
> + {"BMC156B", 0},
> + {},
> +};
> +MODULE_DEVICE_TABLE(acpi, bmc150_magn_acpi_match);
> +
> +static const struct i2c_device_id bmc150_magn_i2c_id[] = {
> + {"bmc150_magn", 0},
> + {"bmc156_magn", 0},
> + {}
> +};
> +MODULE_DEVICE_TABLE(i2c, bmc150_magn_i2c_id);
> +
> +static struct i2c_driver bmc150_magn_driver = {
> + .driver = {
> + .name = "bmc150_magn_i2c",
> + .acpi_match_table = ACPI_PTR(bmc150_magn_acpi_match),
> + .pm = &bmc150_magn_pm_ops,
> + },
> + .probe = bmc150_magn_i2c_probe,
> + .remove = bmc150_magn_i2c_remove,
> + .id_table = bmc150_magn_i2c_id,
> +};
> +module_i2c_driver(bmc150_magn_driver);
> +
> +MODULE_AUTHOR("Daniel Baluta <daniel.baluta@xxxxxxxxx");
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("BMC150 I2C magnetometer driver");
>
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