Hi Peter, On Thu, Aug 28, 2014 at 11:26:19AM +0200, Peter Meerwald wrote: > > > 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 > > BMA222 - 8 bit resolution > > BMA250 - 10 bit resolution > > BMA280 - 14 bit resolution > > I recently proposed to add BMA250 support to the BMA180 IIO driver; > according to the datasheet, the chip ID value for the BMA180 and (!) > BMA250 is 0x03, while your patch claims that it is 0xf9 Actually, this driver is for BMA250E and BMA222E. I didn't even notice there are other versions of these chips... :/ That's why I ignored the 'E' in the IDs. I will fix the comments and the other IDs in the next patchset version.
I looked closer now, on the Bosch-Sensortec web page and, apparently, BMA222 and BMA250 are older versions, 'not recommended for new designs'. > > see > http://ae-bst.resource.bosch.com/media/products/dokumente/bma250/bst-bma250-ds002-05.pdf, > > page 37 (and it really is on my chip :) > > the question is whether to add further Bosch accelerometer chips to the > BMA180 driver or the BMC150 driver and what explains the different chip IDs Clearly, in terms of register compatibility, the chips I mentioned are completely compatible with BMC150 accelerometer, AFAICS, except for the data registers which have different resolutions. However, the 'non-E' versions are a little different and they seem to match BMA180. laurentiu > > need to check if these are really so similar and what driver provides / > exposes more features > > p. > > > 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; > > > > Signed-off-by: Laurentiu Palcu <[email protected]> > > --- > > drivers/iio/accel/bmc150-accel.c | 231 > > ++++++++++++++++++++++++++++++--------- > > 1 file changed, 177 insertions(+), 54 deletions(-) > > > > diff --git a/drivers/iio/accel/bmc150-accel.c > > b/drivers/iio/accel/bmc150-accel.c > > index 0e6566a..07e10fc 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 > > + * - BMA250 > > + * - BMA222 > > + * - BMA280 > > + * > > * Copyright (c) 2014, Intel Corporation. > > * > > * This program is free software; you can redistribute it and/or modify it > > @@ -35,6 +42,11 @@ > > > > #define BMC150_ACCEL_REG_CHIP_ID 0x00 > > #define BMC150_ACCEL_CHIP_ID_VAL 0xFA > > +#define BMA255_ACCEL_CHIP_ID_VAL 0xFA > > +#define BMI055_ACCEL_CHIP_ID_VAL 0xFA > > +#define BMA222_ACCEL_CHIP_ID_VAL 0xF8 > > +#define BMA250_ACCEL_CHIP_ID_VAL 0xF9 > > +#define BMA280_ACCEL_CHIP_ID_VAL 0xFB > > > > #define BMC150_ACCEL_REG_INT_STATUS_2 0x0B > > #define BMC150_ACCEL_ANY_MOTION_MASK 0x07 > > @@ -126,6 +138,18 @@ enum bmc150_power_modes { > > BMC150_ACCEL_SLEEP_MODE_SUSPEND = 0x04, > > }; > > > > +struct bmc150_scale_info { > > + int scale; > > + int 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 +164,7 @@ 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 { > > @@ -168,14 +193,6 @@ 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; > > } bmc150_accel_sleep_value_table[] = { {0, 0}, > > @@ -267,7 +284,7 @@ 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 +558,19 @@ 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->chip_info->scale_table[i].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].range; > > return 0; > > } > > } > > @@ -580,10 +597,12 @@ 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 +619,8 @@ 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 +645,7 @@ 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; > > } > > @@ -647,12 +665,13 @@ static int bmc150_accel_read_raw(struct iio_dev > > *indio_dev, > > { > > int i; > > > > - for (i = 0; i < ARRAY_SIZE(bmc150_accel_scale_table); > > - ++i) { > > - if (bmc150_accel_scale_table[i].range == > > + for (i = 0; > > + i < ARRAY_SIZE(data->chip_info->scale_table); > > + ++i) { > > + if (data->chip_info->scale_table[i].range == > > data->range) { > > *val2 = > > - bmc150_accel_scale_table[i].scale; > > + data->chip_info->scale_table[i].scale; > > return IIO_VAL_INT_PLUS_MICRO; > > } > > } > > @@ -840,7 +859,7 @@ 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, \ > > @@ -850,28 +869,103 @@ 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, > > - }, > > - BMC150_ACCEL_CHANNEL(X), > > - BMC150_ACCEL_CHANNEL(Y), > > - BMC150_ACCEL_CHANNEL(Z), > > - IIO_CHAN_SOFT_TIMESTAMP(3), > > +#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 bma222_accel_channels[] = > > + BMC150_ACCEL_CHANNELS(8); > > +static const struct iio_chan_spec bma250_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, > > + bma250, > > + bma222, > > + bma280, > > }; > > > > +static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = { > > + [bmc150] = { > > + .chip_id = BMC150_ACCEL_CHIP_ID_VAL, > > + .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}, > > + {75590, BMC150_ACCEL_DEF_RANGE_16G} }, > > + }, > > + [bmi055] = { > > + .chip_id = BMI055_ACCEL_CHIP_ID_VAL, > > + .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}, > > + {75590, BMC150_ACCEL_DEF_RANGE_16G} }, > > + }, > > + [bma255] = { > > + .chip_id = BMA255_ACCEL_CHIP_ID_VAL, > > + .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}, > > + {75590, BMC150_ACCEL_DEF_RANGE_16G} }, > > + }, > > + [bma250] = { > > + .chip_id = BMA250_ACCEL_CHIP_ID_VAL, > > + .channels = bma250_accel_channels, > > + .num_channels = ARRAY_SIZE(bma250_accel_channels), > > + .scale_table = { {38344, BMC150_ACCEL_DEF_RANGE_2G}, > > + {75590, BMC150_ACCEL_DEF_RANGE_4G}, > > + {153277, BMC150_ACCEL_DEF_RANGE_8G}, > > + {306457, BMC150_ACCEL_DEF_RANGE_16G} }, > > + }, > > + [bma222] = { > > + .chip_id = BMA222_ACCEL_CHIP_ID_VAL, > > + .channels = bma222_accel_channels, > > + .num_channels = ARRAY_SIZE(bma222_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 = BMA280_ACCEL_CHIP_ID_VAL, > > + .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} }, > > + }, > > +}; > > + > > static const struct iio_info bmc150_accel_info = { > > .attrs = &bmc150_accel_attrs_group, > > .read_raw = bmc150_accel_read_raw, > > @@ -1040,10 +1134,23 @@ 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 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 (char *) 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 +1159,11 @@ 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 +1184,8 @@ static int bmc150_accel_probe(struct i2c_client > > *client, > > struct bmc150_accel_data *data; > > struct iio_dev *indio_dev; > > int ret; > > + char *name = NULL; > > + int chip_id = 0; > > > > indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); > > if (!indio_dev) > > @@ -1092,6 +1195,16 @@ static int bmc150_accel_probe(struct i2c_client > > *client, > > i2c_set_clientdata(client, indio_dev); > > data->client = client; > > > > + if (id) { > > + name = (char *) 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 +1212,14 @@ 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 +1397,24 @@ 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}, > > + {"BMA0250", bma250}, > > + {"BMA0222", bma222}, > > + {"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}, > > + {"bma250", bma250}, > > + {"bma222", bma222}, > > + {"bma280", bma280}, > > {} > > }; > > > > > > -- > > Peter Meerwald > +43-664-2444418 (mobile) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
