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author | Laurentiu Palcu <laurentiu.palcu@intel.com> | 2014-02-09 10:30:00 +0000 |
---|---|---|
committer | Jonathan Cameron <jic23@kernel.org> | 2014-09-13 21:35:46 +0100 |
commit | 8ecbb3c3c712d9c859586886d621e3b6175da972 (patch) | |
tree | e4ba972d22b5b2f1c202353fc5310d229850e4e2 /drivers/iio/accel | |
parent | dc4ecaf21c4a0c060f2728d31bf492ceb2c8daaf (diff) | |
download | linux-stable-8ecbb3c3c712d9c859586886d621e3b6175da972.tar.gz linux-stable-8ecbb3c3c712d9c859586886d621e3b6175da972.tar.bz2 linux-stable-8ecbb3c3c712d9c859586886d621e3b6175da972.zip |
iio: accel: BMC150: add support for other Bosch chips
The following chips are either similar or have only the resolution
different. Hence, change this driver to support these chips too:
BMI055 - combo chip (accelerometer part is identical to BMC150's)
BMA255 - identical to BMC150's accelerometer
BMA222E - 8 bit resolution
BMA250E - 10 bit resolution
BMA280 - 14 bit resolution
Additionally:
* add bmc150_accel_match_acpi_device() function to check that the device
has been enumerated through ACPI;
* rename bmc150_accel_acpi_gpio_probe() to bmc150_accel_gpio_probe()
since the ACPI matching has been moved to the new function. Also, this
will allow for the GPIO matching to be done against a device tree too, not only
ACPI tree;
* rename bmc150_scale_info struct member 'range' to 'reg_range' to be
consistent with the naming convention used elsewhere in the driver
and declare it u8, instead of int;
* change CONFIG description to list all supported chips;
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/accel')
-rw-r--r-- | drivers/iio/accel/Kconfig | 4 | ||||
-rw-r--r-- | drivers/iio/accel/bmc150-accel.c | 234 |
2 files changed, 178 insertions, 60 deletions
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index 01b857e2fcbd..01a2151677a9 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -23,7 +23,9 @@ config BMC150_ACCEL select IIO_BUFFER select IIO_TRIGGERED_BUFFER help - Say yes here to build support for the Bosch BMC150 accelerometer. + Say yes here to build support for the following Bosch accelerometers: + BMC150, BMI055, BMA250E, BMA222E, BMA255, BMA280. + Currently this only supports the device via an i2c interface. This is a combo module with both accelerometer and magnetometer. diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c index 0e6566adca24..22c096ce39ad 100644 --- a/drivers/iio/accel/bmc150-accel.c +++ b/drivers/iio/accel/bmc150-accel.c @@ -1,5 +1,12 @@ /* - * BMC150 3-axis accelerometer driver + * 3-axis accelerometer driver supporting following Bosch-Sensortec chips: + * - BMC150 + * - BMI055 + * - BMA255 + * - BMA250E + * - BMA222E + * - BMA280 + * * Copyright (c) 2014, Intel Corporation. * * This program is free software; you can redistribute it and/or modify it @@ -34,7 +41,6 @@ #define BMC150_ACCEL_GPIO_NAME "bmc150_accel_int" #define BMC150_ACCEL_REG_CHIP_ID 0x00 -#define BMC150_ACCEL_CHIP_ID_VAL 0xFA #define BMC150_ACCEL_REG_INT_STATUS_2 0x0B #define BMC150_ACCEL_ANY_MOTION_MASK 0x07 @@ -126,6 +132,18 @@ enum bmc150_power_modes { BMC150_ACCEL_SLEEP_MODE_SUSPEND = 0x04, }; +struct bmc150_scale_info { + int scale; + u8 reg_range; +}; + +struct bmc150_accel_chip_info { + u8 chip_id; + const struct iio_chan_spec *channels; + int num_channels; + const struct bmc150_scale_info scale_table[4]; +}; + struct bmc150_accel_data { struct i2c_client *client; struct iio_trigger *dready_trig; @@ -140,6 +158,7 @@ struct bmc150_accel_data { bool dready_trigger_on; bool motion_trigger_on; int64_t timestamp; + const struct bmc150_accel_chip_info *chip_info; }; static const struct { @@ -168,16 +187,8 @@ static const struct { {0x0F, 1} }; static const struct { - int scale; - int range; -} bmc150_accel_scale_table[] = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, - {19122, BMC150_ACCEL_DEF_RANGE_4G}, - {38344, BMC150_ACCEL_DEF_RANGE_8G}, - {76590, BMC150_ACCEL_DEF_RANGE_16G} }; - -static const struct { int sleep_dur; - int reg_value; + u8 reg_value; } bmc150_accel_sleep_value_table[] = { {0, 0}, {500, BMC150_ACCEL_SLEEP_500_MICRO}, {1000, BMC150_ACCEL_SLEEP_1_MS}, @@ -267,7 +278,7 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data) } dev_dbg(&data->client->dev, "Chip Id %x\n", ret); - if (ret != BMC150_ACCEL_CHIP_ID_VAL) { + if (ret != data->chip_info->chip_id) { dev_err(&data->client->dev, "Invalid chip %x\n", ret); return -ENODEV; } @@ -541,19 +552,19 @@ static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val) { int ret, i; - for (i = 0; i < ARRAY_SIZE(bmc150_accel_scale_table); ++i) { - if (bmc150_accel_scale_table[i].scale == val) { + for (i = 0; i < ARRAY_SIZE(data->chip_info->scale_table); ++i) { + if (data->chip_info->scale_table[i].scale == val) { ret = i2c_smbus_write_byte_data( - data->client, - BMC150_ACCEL_REG_PMU_RANGE, - bmc150_accel_scale_table[i].range); + data->client, + BMC150_ACCEL_REG_PMU_RANGE, + data->chip_info->scale_table[i].reg_range); if (ret < 0) { dev_err(&data->client->dev, "Error writing pmu_range\n"); return ret; } - data->range = bmc150_accel_scale_table[i].range; + data->range = data->chip_info->scale_table[i].reg_range; return 0; } } @@ -580,10 +591,12 @@ static int bmc150_accel_get_temp(struct bmc150_accel_data *data, int *val) return IIO_VAL_INT; } -static int bmc150_accel_get_axis(struct bmc150_accel_data *data, int axis, +static int bmc150_accel_get_axis(struct bmc150_accel_data *data, + struct iio_chan_spec const *chan, int *val) { int ret; + int axis = chan->scan_index; mutex_lock(&data->mutex); ret = bmc150_accel_set_power_state(data, true); @@ -600,7 +613,8 @@ static int bmc150_accel_get_axis(struct bmc150_accel_data *data, int axis, mutex_unlock(&data->mutex); return ret; } - *val = sign_extend32(ret >> 4, 11); + *val = sign_extend32(ret >> chan->scan_type.shift, + chan->scan_type.realbits - 1); ret = bmc150_accel_set_power_state(data, false); mutex_unlock(&data->mutex); if (ret < 0) @@ -625,9 +639,7 @@ static int bmc150_accel_read_raw(struct iio_dev *indio_dev, if (iio_buffer_enabled(indio_dev)) return -EBUSY; else - return bmc150_accel_get_axis(data, - chan->scan_index, - val); + return bmc150_accel_get_axis(data, chan, val); default: return -EINVAL; } @@ -646,13 +658,13 @@ static int bmc150_accel_read_raw(struct iio_dev *indio_dev, case IIO_ACCEL: { int i; + const struct bmc150_scale_info *si; + int st_size = ARRAY_SIZE(data->chip_info->scale_table); - for (i = 0; i < ARRAY_SIZE(bmc150_accel_scale_table); - ++i) { - if (bmc150_accel_scale_table[i].range == - data->range) { - *val2 = - bmc150_accel_scale_table[i].scale; + for (i = 0; i < st_size; ++i) { + si = &data->chip_info->scale_table[i]; + if (si->reg_range == data->range) { + *val2 = si->scale; return IIO_VAL_INT_PLUS_MICRO; } } @@ -840,7 +852,7 @@ static const struct iio_event_spec bmc150_accel_event = { BIT(IIO_EV_INFO_PERIOD) }; -#define BMC150_ACCEL_CHANNEL(_axis) { \ +#define BMC150_ACCEL_CHANNEL(_axis, bits) { \ .type = IIO_ACCEL, \ .modified = 1, \ .channel2 = IIO_MOD_##_axis, \ @@ -850,26 +862,101 @@ static const struct iio_event_spec bmc150_accel_event = { .scan_index = AXIS_##_axis, \ .scan_type = { \ .sign = 's', \ - .realbits = 12, \ + .realbits = (bits), \ .storagebits = 16, \ - .shift = 4, \ + .shift = 16 - (bits), \ }, \ .event_spec = &bmc150_accel_event, \ .num_event_specs = 1 \ } -static const struct iio_chan_spec bmc150_accel_channels[] = { - { - .type = IIO_TEMP, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | - BIT(IIO_CHAN_INFO_SCALE) | - BIT(IIO_CHAN_INFO_OFFSET), - .scan_index = -1, +#define BMC150_ACCEL_CHANNELS(bits) { \ + { \ + .type = IIO_TEMP, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_OFFSET), \ + .scan_index = -1, \ + }, \ + BMC150_ACCEL_CHANNEL(X, bits), \ + BMC150_ACCEL_CHANNEL(Y, bits), \ + BMC150_ACCEL_CHANNEL(Z, bits), \ + IIO_CHAN_SOFT_TIMESTAMP(3), \ +} + +static const struct iio_chan_spec bma222e_accel_channels[] = + BMC150_ACCEL_CHANNELS(8); +static const struct iio_chan_spec bma250e_accel_channels[] = + BMC150_ACCEL_CHANNELS(10); +static const struct iio_chan_spec bmc150_accel_channels[] = + BMC150_ACCEL_CHANNELS(12); +static const struct iio_chan_spec bma280_accel_channels[] = + BMC150_ACCEL_CHANNELS(14); + +enum { + bmc150, + bmi055, + bma255, + bma250e, + bma222e, + bma280, +}; + +static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = { + [bmc150] = { + .chip_id = 0xFA, + .channels = bmc150_accel_channels, + .num_channels = ARRAY_SIZE(bmc150_accel_channels), + .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, + {19122, BMC150_ACCEL_DEF_RANGE_4G}, + {38344, BMC150_ACCEL_DEF_RANGE_8G}, + {76590, BMC150_ACCEL_DEF_RANGE_16G} }, + }, + [bmi055] = { + .chip_id = 0xFA, + .channels = bmc150_accel_channels, + .num_channels = ARRAY_SIZE(bmc150_accel_channels), + .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, + {19122, BMC150_ACCEL_DEF_RANGE_4G}, + {38344, BMC150_ACCEL_DEF_RANGE_8G}, + {76590, BMC150_ACCEL_DEF_RANGE_16G} }, + }, + [bma255] = { + .chip_id = 0xFA, + .channels = bmc150_accel_channels, + .num_channels = ARRAY_SIZE(bmc150_accel_channels), + .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, + {19122, BMC150_ACCEL_DEF_RANGE_4G}, + {38344, BMC150_ACCEL_DEF_RANGE_8G}, + {76590, BMC150_ACCEL_DEF_RANGE_16G} }, + }, + [bma250e] = { + .chip_id = 0xF9, + .channels = bma250e_accel_channels, + .num_channels = ARRAY_SIZE(bma250e_accel_channels), + .scale_table = { {38344, BMC150_ACCEL_DEF_RANGE_2G}, + {76590, BMC150_ACCEL_DEF_RANGE_4G}, + {153277, BMC150_ACCEL_DEF_RANGE_8G}, + {306457, BMC150_ACCEL_DEF_RANGE_16G} }, + }, + [bma222e] = { + .chip_id = 0xF8, + .channels = bma222e_accel_channels, + .num_channels = ARRAY_SIZE(bma222e_accel_channels), + .scale_table = { {153277, BMC150_ACCEL_DEF_RANGE_2G}, + {306457, BMC150_ACCEL_DEF_RANGE_4G}, + {612915, BMC150_ACCEL_DEF_RANGE_8G}, + {1225831, BMC150_ACCEL_DEF_RANGE_16G} }, + }, + [bma280] = { + .chip_id = 0xFB, + .channels = bma280_accel_channels, + .num_channels = ARRAY_SIZE(bma280_accel_channels), + .scale_table = { {2392, BMC150_ACCEL_DEF_RANGE_2G}, + {4785, BMC150_ACCEL_DEF_RANGE_4G}, + {9581, BMC150_ACCEL_DEF_RANGE_8G}, + {19152, BMC150_ACCEL_DEF_RANGE_16G} }, }, - BMC150_ACCEL_CHANNEL(X), - BMC150_ACCEL_CHANNEL(Y), - BMC150_ACCEL_CHANNEL(Z), - IIO_CHAN_SOFT_TIMESTAMP(3), }; static const struct iio_info bmc150_accel_info = { @@ -1040,10 +1127,23 @@ static irqreturn_t bmc150_accel_data_rdy_trig_poll(int irq, void *private) return IRQ_HANDLED; } -static int bmc150_accel_acpi_gpio_probe(struct i2c_client *client, - struct bmc150_accel_data *data) +static const char *bmc150_accel_match_acpi_device(struct device *dev, int *data) { const struct acpi_device_id *id; + + id = acpi_match_device(dev->driver->acpi_match_table, dev); + + if (!id) + return NULL; + + *data = (int) id->driver_data; + + return dev_name(dev); +} + +static int bmc150_accel_gpio_probe(struct i2c_client *client, + struct bmc150_accel_data *data) +{ struct device *dev; struct gpio_desc *gpio; int ret; @@ -1052,17 +1152,11 @@ static int bmc150_accel_acpi_gpio_probe(struct i2c_client *client, return -EINVAL; dev = &client->dev; - if (!ACPI_HANDLE(dev)) - return -ENODEV; - - id = acpi_match_device(dev->driver->acpi_match_table, dev); - if (!id) - return -ENODEV; /* data ready gpio interrupt pin */ gpio = devm_gpiod_get_index(dev, BMC150_ACCEL_GPIO_NAME, 0); if (IS_ERR(gpio)) { - dev_err(dev, "Failed: acpi gpio get index\n"); + dev_err(dev, "Failed: gpio get index\n"); return PTR_ERR(gpio); } @@ -1083,6 +1177,8 @@ static int bmc150_accel_probe(struct i2c_client *client, struct bmc150_accel_data *data; struct iio_dev *indio_dev; int ret; + const char *name = NULL; + int chip_id = 0; indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); if (!indio_dev) @@ -1092,6 +1188,16 @@ static int bmc150_accel_probe(struct i2c_client *client, i2c_set_clientdata(client, indio_dev); data->client = client; + if (id) { + name = id->name; + chip_id = id->driver_data; + } + + if (ACPI_HANDLE(&client->dev)) + name = bmc150_accel_match_acpi_device(&client->dev, &chip_id); + + data->chip_info = &bmc150_accel_chip_info_tbl[chip_id]; + ret = bmc150_accel_chip_init(data); if (ret < 0) return ret; @@ -1099,14 +1205,14 @@ static int bmc150_accel_probe(struct i2c_client *client, mutex_init(&data->mutex); indio_dev->dev.parent = &client->dev; - indio_dev->channels = bmc150_accel_channels; - indio_dev->num_channels = ARRAY_SIZE(bmc150_accel_channels); - indio_dev->name = BMC150_ACCEL_DRV_NAME; + indio_dev->channels = data->chip_info->channels; + indio_dev->num_channels = data->chip_info->num_channels; + indio_dev->name = name; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &bmc150_accel_info; if (client->irq < 0) - client->irq = bmc150_accel_acpi_gpio_probe(client, data); + client->irq = bmc150_accel_gpio_probe(client, data); if (client->irq >= 0) { ret = devm_request_threaded_irq( @@ -1284,14 +1390,24 @@ static const struct dev_pm_ops bmc150_accel_pm_ops = { }; static const struct acpi_device_id bmc150_accel_acpi_match[] = { - {"BSBA0150", 0}, - {"BMC150A", 0}, + {"BSBA0150", bmc150}, + {"BMC150A", bmc150}, + {"BMI055A", bmi055}, + {"BMA0255", bma255}, + {"BMA250E", bma250e}, + {"BMA222E", bma222e}, + {"BMA0280", bma280}, { }, }; MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match); static const struct i2c_device_id bmc150_accel_id[] = { - {"bmc150_accel", 0}, + {"bmc150_accel", bmc150}, + {"bmi055_accel", bmi055}, + {"bma255", bma255}, + {"bma250e", bma250e}, + {"bma222e", bma222e}, + {"bma280", bma280}, {} }; 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