diff options
author | Markus Pargmann <mpa@pengutronix.de> | 2015-09-21 12:55:13 +0200 |
---|---|---|
committer | Jonathan Cameron <jic23@kernel.org> | 2015-10-03 12:05:52 +0100 |
commit | 4011eda6139b315af3483c6de7dbdded3b07aedf (patch) | |
tree | eeedc3fef35a29f96ae9f50c4723b8badb0f7b63 /drivers/iio/accel/bmc150-accel.c | |
parent | 0f0796509c07c1c7b77671c05b2955beb245e367 (diff) | |
download | op-kernel-dev-4011eda6139b315af3483c6de7dbdded3b07aedf.zip op-kernel-dev-4011eda6139b315af3483c6de7dbdded3b07aedf.tar.gz |
iio: bmc150: Use i2c regmap
This replaces all usage of direct i2c accesses with regmap accesses.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Tested-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/accel/bmc150-accel.c')
-rw-r--r-- | drivers/iio/accel/bmc150-accel.c | 225 |
1 files changed, 97 insertions, 128 deletions
diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c index 6d19d46..689b1e6 100644 --- a/drivers/iio/accel/bmc150-accel.c +++ b/drivers/iio/accel/bmc150-accel.c @@ -35,6 +35,7 @@ #include <linux/iio/trigger.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> +#include <linux/regmap.h> #define BMC150_ACCEL_DRV_NAME "bmc150_accel" #define BMC150_ACCEL_IRQ_NAME "bmc150_accel_event" @@ -185,6 +186,8 @@ enum bmc150_accel_trigger_id { struct bmc150_accel_data { struct i2c_client *client; + struct regmap *regmap; + struct device *dev; struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS]; atomic_t active_intr; struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS]; @@ -241,6 +244,12 @@ static const struct { {500000, BMC150_ACCEL_SLEEP_500_MS}, {1000000, BMC150_ACCEL_SLEEP_1_SEC} }; +static const struct regmap_config bmc150_i2c_regmap_conf = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x3f, +}; + static int bmc150_accel_set_mode(struct bmc150_accel_data *data, enum bmc150_power_modes mode, int dur_us) @@ -270,8 +279,7 @@ static int bmc150_accel_set_mode(struct bmc150_accel_data *data, dev_dbg(&data->client->dev, "Set Mode bits %x\n", lpw_bits); - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_PMU_LPW, lpw_bits); + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_LPW, lpw_bits); if (ret < 0) { dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n"); return ret; @@ -289,8 +297,7 @@ static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val, for (i = 0; i < ARRAY_SIZE(bmc150_accel_samp_freq_table); ++i) { if (bmc150_accel_samp_freq_table[i].val == val && bmc150_accel_samp_freq_table[i].val2 == val2) { - ret = i2c_smbus_write_byte_data( - data->client, + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_BW, bmc150_accel_samp_freq_table[i].bw_bits); if (ret < 0) @@ -307,26 +314,19 @@ static int bmc150_accel_set_bw(struct bmc150_accel_data *data, int val, static int bmc150_accel_update_slope(struct bmc150_accel_data *data) { - int ret, val; + int ret; - ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_6, + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_6, data->slope_thres); if (ret < 0) { dev_err(&data->client->dev, "Error writing reg_int_6\n"); return ret; } - ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_INT_5); + ret = regmap_update_bits(data->regmap, BMC150_ACCEL_REG_INT_5, + BMC150_ACCEL_SLOPE_DUR_MASK, data->slope_dur); if (ret < 0) { - dev_err(&data->client->dev, "Error reading reg_int_5\n"); - return ret; - } - - val = (ret & ~BMC150_ACCEL_SLOPE_DUR_MASK) | data->slope_dur; - ret = i2c_smbus_write_byte_data(data->client, BMC150_ACCEL_REG_INT_5, - val); - if (ret < 0) { - dev_err(&data->client->dev, "Error write reg_int_5\n"); + dev_err(&data->client->dev, "Error updating reg_int_5\n"); return ret; } @@ -469,38 +469,18 @@ static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, int i, return ret; /* map the interrupt to the appropriate pins */ - ret = i2c_smbus_read_byte_data(data->client, info->map_reg); + ret = regmap_update_bits(data->regmap, info->map_reg, info->map_bitmask, + (state ? info->map_bitmask : 0)); if (ret < 0) { - dev_err(&data->client->dev, "Error reading reg_int_map\n"); - goto out_fix_power_state; - } - if (state) - ret |= info->map_bitmask; - else - ret &= ~info->map_bitmask; - - ret = i2c_smbus_write_byte_data(data->client, info->map_reg, - ret); - if (ret < 0) { - dev_err(&data->client->dev, "Error writing reg_int_map\n"); + dev_err(&data->client->dev, "Error updating reg_int_map\n"); goto out_fix_power_state; } /* enable/disable the interrupt */ - ret = i2c_smbus_read_byte_data(data->client, info->en_reg); - if (ret < 0) { - dev_err(&data->client->dev, "Error reading reg_int_en\n"); - goto out_fix_power_state; - } - - if (state) - ret |= info->en_bitmask; - else - ret &= ~info->en_bitmask; - - ret = i2c_smbus_write_byte_data(data->client, info->en_reg, ret); + ret = regmap_update_bits(data->regmap, info->en_reg, info->en_bitmask, + (state ? info->en_bitmask : 0)); if (ret < 0) { - dev_err(&data->client->dev, "Error writing reg_int_en\n"); + dev_err(&data->client->dev, "Error updating reg_int_en\n"); goto out_fix_power_state; } @@ -522,8 +502,7 @@ static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int 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, + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_RANGE, data->chip_info->scale_table[i].reg_range); if (ret < 0) { @@ -543,16 +522,17 @@ static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val) static int bmc150_accel_get_temp(struct bmc150_accel_data *data, int *val) { int ret; + unsigned int value; mutex_lock(&data->mutex); - ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_TEMP); + ret = regmap_read(data->regmap, BMC150_ACCEL_REG_TEMP, &value); if (ret < 0) { dev_err(&data->client->dev, "Error reading reg_temp\n"); mutex_unlock(&data->mutex); return ret; } - *val = sign_extend32(ret, 7); + *val = sign_extend32(value, 7); mutex_unlock(&data->mutex); @@ -565,6 +545,7 @@ static int bmc150_accel_get_axis(struct bmc150_accel_data *data, { int ret; int axis = chan->scan_index; + unsigned int raw_val; mutex_lock(&data->mutex); ret = bmc150_accel_set_power_state(data, true); @@ -573,15 +554,15 @@ static int bmc150_accel_get_axis(struct bmc150_accel_data *data, return ret; } - ret = i2c_smbus_read_word_data(data->client, - BMC150_ACCEL_AXIS_TO_REG(axis)); + ret = regmap_bulk_read(data->regmap, BMC150_ACCEL_AXIS_TO_REG(axis), + &raw_val, 2); if (ret < 0) { dev_err(&data->client->dev, "Error reading axis %d\n", axis); bmc150_accel_set_power_state(data, false); mutex_unlock(&data->mutex); return ret; } - *val = sign_extend32(ret >> chan->scan_type.shift, + *val = sign_extend32(raw_val >> chan->scan_type.shift, chan->scan_type.realbits - 1); ret = bmc150_accel_set_power_state(data, false); mutex_unlock(&data->mutex); @@ -845,52 +826,34 @@ static int bmc150_accel_set_watermark(struct iio_dev *indio_dev, unsigned val) * We must read at least one full frame in one burst, otherwise the rest of the * frame data is discarded. */ -static int bmc150_accel_fifo_transfer(const struct i2c_client *client, +static int bmc150_accel_fifo_transfer(struct bmc150_accel_data *data, char *buffer, int samples) { int sample_length = 3 * 2; - u8 reg_fifo_data = BMC150_ACCEL_REG_FIFO_DATA; - int ret = -EIO; - - if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { - struct i2c_msg msg[2] = { - { - .addr = client->addr, - .flags = 0, - .buf = ®_fifo_data, - .len = sizeof(reg_fifo_data), - }, - { - .addr = client->addr, - .flags = I2C_M_RD, - .buf = (u8 *)buffer, - .len = samples * sample_length, - } - }; + int ret; + int total_length = samples * sample_length; + int i; + size_t step = regmap_get_raw_read_max(data->regmap); - ret = i2c_transfer(client->adapter, msg, 2); - if (ret != 2) - ret = -EIO; - else - ret = 0; - } else { - int i, step = I2C_SMBUS_BLOCK_MAX / sample_length; - - for (i = 0; i < samples * sample_length; i += step) { - ret = i2c_smbus_read_i2c_block_data(client, - reg_fifo_data, step, - &buffer[i]); - if (ret != step) { - ret = -EIO; - break; - } + if (!step || step > total_length) + step = total_length; + else if (step < total_length) + step = sample_length; - ret = 0; - } + /* + * Seems we have a bus with size limitation so we have to execute + * multiple reads + */ + for (i = 0; i < total_length; i += step) { + ret = regmap_raw_read(data->regmap, BMC150_ACCEL_REG_FIFO_DATA, + &buffer[i], step); + if (ret) + break; } if (ret) - dev_err(&client->dev, "Error transferring data from fifo\n"); + dev_err(data->dev, "Error transferring data from fifo in single steps of %zu\n", + step); return ret; } @@ -904,15 +867,15 @@ static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev, u16 buffer[BMC150_ACCEL_FIFO_LENGTH * 3]; int64_t tstamp; uint64_t sample_period; + unsigned int val; - ret = i2c_smbus_read_byte_data(data->client, - BMC150_ACCEL_REG_FIFO_STATUS); + ret = regmap_read(data->regmap, BMC150_ACCEL_REG_FIFO_STATUS, &val); if (ret < 0) { dev_err(&data->client->dev, "Error reading reg_fifo_status\n"); return ret; } - count = ret & 0x7F; + count = val & 0x7F; if (!count) return 0; @@ -951,7 +914,7 @@ static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev, if (samples && count > samples) count = samples; - ret = bmc150_accel_fifo_transfer(data->client, (u8 *)buffer, count); + ret = bmc150_accel_fifo_transfer(data, (u8 *)buffer, count); if (ret) return ret; @@ -1154,17 +1117,19 @@ static irqreturn_t bmc150_accel_trigger_handler(int irq, void *p) struct iio_dev *indio_dev = pf->indio_dev; struct bmc150_accel_data *data = iio_priv(indio_dev); int bit, ret, i = 0; + unsigned int raw_val; mutex_lock(&data->mutex); for_each_set_bit(bit, indio_dev->active_scan_mask, indio_dev->masklength) { - ret = i2c_smbus_read_word_data(data->client, - BMC150_ACCEL_AXIS_TO_REG(bit)); + ret = regmap_bulk_read(data->regmap, + BMC150_ACCEL_AXIS_TO_REG(bit), &raw_val, + 2); if (ret < 0) { mutex_unlock(&data->mutex); goto err_read; } - data->buffer[i++] = ret; + data->buffer[i++] = raw_val; } mutex_unlock(&data->mutex); @@ -1188,10 +1153,9 @@ static int bmc150_accel_trig_try_reen(struct iio_trigger *trig) mutex_lock(&data->mutex); /* clear any latched interrupt */ - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_RST_LATCH, - BMC150_ACCEL_INT_MODE_LATCH_INT | - BMC150_ACCEL_INT_MODE_LATCH_RESET); + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH, + BMC150_ACCEL_INT_MODE_LATCH_INT | + BMC150_ACCEL_INT_MODE_LATCH_RESET); mutex_unlock(&data->mutex); if (ret < 0) { dev_err(&data->client->dev, @@ -1248,20 +1212,20 @@ static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev) struct bmc150_accel_data *data = iio_priv(indio_dev); int dir; int ret; + unsigned int val; - ret = i2c_smbus_read_byte_data(data->client, - BMC150_ACCEL_REG_INT_STATUS_2); + ret = regmap_read(data->regmap, BMC150_ACCEL_REG_INT_STATUS_2, &val); if (ret < 0) { dev_err(&data->client->dev, "Error reading reg_int_status_2\n"); return ret; } - if (ret & BMC150_ACCEL_ANY_MOTION_BIT_SIGN) + if (val & BMC150_ACCEL_ANY_MOTION_BIT_SIGN) dir = IIO_EV_DIR_FALLING; else dir = IIO_EV_DIR_RISING; - if (ret & BMC150_ACCEL_ANY_MOTION_BIT_X) + if (val & BMC150_ACCEL_ANY_MOTION_BIT_X) iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, @@ -1270,7 +1234,7 @@ static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev) dir), data->timestamp); - if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Y) + if (val & BMC150_ACCEL_ANY_MOTION_BIT_Y) iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, @@ -1279,7 +1243,7 @@ static int bmc150_accel_handle_roc_event(struct iio_dev *indio_dev) dir), data->timestamp); - if (ret & BMC150_ACCEL_ANY_MOTION_BIT_Z) + if (val & BMC150_ACCEL_ANY_MOTION_BIT_Z) iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, @@ -1314,10 +1278,9 @@ static irqreturn_t bmc150_accel_irq_thread_handler(int irq, void *private) } if (ack) { - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_RST_LATCH, - BMC150_ACCEL_INT_MODE_LATCH_INT | - BMC150_ACCEL_INT_MODE_LATCH_RESET); + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH, + BMC150_ACCEL_INT_MODE_LATCH_INT | + BMC150_ACCEL_INT_MODE_LATCH_RESET); if (ret) dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n"); @@ -1432,7 +1395,7 @@ static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data) u8 reg = BMC150_ACCEL_REG_FIFO_CONFIG1; int ret; - ret = i2c_smbus_write_byte_data(data->client, reg, data->fifo_mode); + ret = regmap_write(data->regmap, reg, data->fifo_mode); if (ret < 0) { dev_err(&data->client->dev, "Error writing reg_fifo_config1\n"); return ret; @@ -1441,9 +1404,8 @@ static int bmc150_accel_fifo_set_mode(struct bmc150_accel_data *data) if (!data->fifo_mode) return 0; - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_FIFO_CONFIG0, - data->watermark); + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_FIFO_CONFIG0, + data->watermark); if (ret < 0) dev_err(&data->client->dev, "Error writing reg_fifo_config0\n"); @@ -1530,23 +1492,25 @@ static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = { static int bmc150_accel_chip_init(struct bmc150_accel_data *data) { int ret, i; + unsigned int val; - ret = i2c_smbus_read_byte_data(data->client, BMC150_ACCEL_REG_CHIP_ID); + ret = regmap_read(data->regmap, BMC150_ACCEL_REG_CHIP_ID, &val); if (ret < 0) { - dev_err(&data->client->dev, "Error: Reading chip id\n"); + dev_err(&data->client->dev, + "Error: Reading chip id\n"); return ret; } - dev_dbg(&data->client->dev, "Chip Id %x\n", ret); + dev_dbg(&data->client->dev, "Chip Id %x\n", val); for (i = 0; i < ARRAY_SIZE(bmc150_accel_chip_info_tbl); i++) { - if (bmc150_accel_chip_info_tbl[i].chip_id == ret) { + if (bmc150_accel_chip_info_tbl[i].chip_id == val) { data->chip_info = &bmc150_accel_chip_info_tbl[i]; break; } } if (!data->chip_info) { - dev_err(&data->client->dev, "Unsupported chip %x\n", ret); + dev_err(&data->client->dev, "Invalid chip %x\n", val); return -ENODEV; } @@ -1560,11 +1524,11 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data) return ret; /* Set Default Range */ - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_PMU_RANGE, - BMC150_ACCEL_DEF_RANGE_4G); + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_PMU_RANGE, + BMC150_ACCEL_DEF_RANGE_4G); if (ret < 0) { - dev_err(&data->client->dev, "Error writing reg_pmu_range\n"); + dev_err(&data->client->dev, + "Error writing reg_pmu_range\n"); return ret; } @@ -1578,10 +1542,9 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data) return ret; /* Set default as latched interrupts */ - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_RST_LATCH, - BMC150_ACCEL_INT_MODE_LATCH_INT | - BMC150_ACCEL_INT_MODE_LATCH_RESET); + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH, + BMC150_ACCEL_INT_MODE_LATCH_INT | + BMC150_ACCEL_INT_MODE_LATCH_RESET); if (ret < 0) { dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n"); @@ -1606,6 +1569,13 @@ static int bmc150_accel_probe(struct i2c_client *client, data = iio_priv(indio_dev); i2c_set_clientdata(client, indio_dev); data->client = client; + data->dev = &client->dev; + + data->regmap = devm_regmap_init_i2c(client, &bmc150_i2c_regmap_conf); + if (IS_ERR(data->regmap)) { + dev_err(&client->dev, "Failed to initialize i2c regmap\n"); + return PTR_ERR(data->regmap); + } if (id) name = id->name; @@ -1649,9 +1619,8 @@ static int bmc150_accel_probe(struct i2c_client *client, * want to use latch mode when we can to prevent interrupt * flooding. */ - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_RST_LATCH, - BMC150_ACCEL_INT_MODE_LATCH_RESET); + ret = regmap_write(data->regmap, BMC150_ACCEL_REG_INT_RST_LATCH, + BMC150_ACCEL_INT_MODE_LATCH_RESET); if (ret < 0) { dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n"); goto err_buffer_cleanup; |