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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
iio: bmg160: Use i2c regmap instead of direct i2c access
This patch introduces regmap usage into the driver. This is done to later easily support the SPI interface of this chip. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
parent
8548a63b37
commit
c6c9e995bc
2 changed files with 88 additions and 111 deletions
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@ -55,6 +55,7 @@ config BMG160
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depends on I2C
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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select REGMAP_I2C
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help
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Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
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driver. This driver also supports BMI055 gyroscope.
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@ -28,6 +28,7 @@
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#include <linux/iio/events.h>
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#include <linux/iio/trigger_consumer.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/regmap.h>
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#define BMG160_DRV_NAME "bmg160"
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#define BMG160_IRQ_NAME "bmg160_event"
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@ -98,6 +99,7 @@
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struct bmg160_data {
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struct i2c_client *client;
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struct regmap *regmap;
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struct iio_trigger *dready_trig;
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struct iio_trigger *motion_trig;
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struct mutex mutex;
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@ -134,12 +136,17 @@ static const struct {
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{ 133, BMG160_RANGE_250DPS},
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{ 66, BMG160_RANGE_125DPS} };
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static struct regmap_config bmg160_regmap_i2c_conf = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = 0x3f
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};
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static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
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{
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int ret;
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_PMU_LPW, mode);
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ret = regmap_write(data->regmap, BMG160_REG_PMU_LPW, mode);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n");
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return ret;
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@ -169,8 +176,7 @@ static int bmg160_set_bw(struct bmg160_data *data, int val)
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if (bw_bits < 0)
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return bw_bits;
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ret = i2c_smbus_write_byte_data(data->client, BMG160_REG_PMU_BW,
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bw_bits);
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ret = regmap_write(data->regmap, BMG160_REG_PMU_BW, bw_bits);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_pmu_bw\n");
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return ret;
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@ -184,16 +190,17 @@ static int bmg160_set_bw(struct bmg160_data *data, int val)
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static int bmg160_chip_init(struct bmg160_data *data)
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{
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int ret;
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unsigned int val;
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ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_CHIP_ID);
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ret = regmap_read(data->regmap, BMG160_REG_CHIP_ID, &val);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_chip_id\n");
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return ret;
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}
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dev_dbg(&data->client->dev, "Chip Id %x\n", ret);
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if (ret != BMG160_CHIP_ID_VAL) {
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dev_err(&data->client->dev, "invalid chip %x\n", ret);
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dev_dbg(&data->client->dev, "Chip Id %x\n", val);
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if (val != BMG160_CHIP_ID_VAL) {
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dev_err(&data->client->dev, "invalid chip %x\n", val);
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return -ENODEV;
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}
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@ -210,40 +217,31 @@ static int bmg160_chip_init(struct bmg160_data *data)
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return ret;
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/* Set Default Range */
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_RANGE,
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BMG160_RANGE_500DPS);
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ret = regmap_write(data->regmap, BMG160_REG_RANGE, BMG160_RANGE_500DPS);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_range\n");
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return ret;
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}
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data->dps_range = BMG160_RANGE_500DPS;
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ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_SLOPE_THRES);
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ret = regmap_read(data->regmap, BMG160_REG_SLOPE_THRES, &val);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_slope_thres\n");
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return ret;
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}
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data->slope_thres = ret;
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data->slope_thres = val;
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/* Set default interrupt mode */
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ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_EN_1);
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ret = regmap_update_bits(data->regmap, BMG160_REG_INT_EN_1,
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BMG160_INT1_BIT_OD, 0);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_int_en_1\n");
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return ret;
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}
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ret &= ~BMG160_INT1_BIT_OD;
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_EN_1, ret);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_int_en_1\n");
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dev_err(&data->client->dev, "Error updating bits in reg_int_en_1\n");
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return ret;
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}
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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if (ret < 0) {
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dev_err(&data->client->dev,
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"Error writing reg_motion_intr\n");
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@ -284,41 +282,28 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
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int ret;
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/* Enable/Disable INT_MAP0 mapping */
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ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_MAP_0);
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ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_0,
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BMG160_INT_MAP_0_BIT_ANY,
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(status ? BMG160_INT_MAP_0_BIT_ANY : 0));
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_int_map0\n");
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return ret;
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}
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if (status)
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ret |= BMG160_INT_MAP_0_BIT_ANY;
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else
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ret &= ~BMG160_INT_MAP_0_BIT_ANY;
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_MAP_0,
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ret);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_int_map0\n");
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dev_err(&data->client->dev, "Error updating bits reg_int_map0\n");
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return ret;
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}
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/* Enable/Disable slope interrupts */
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if (status) {
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/* Update slope thres */
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_SLOPE_THRES,
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data->slope_thres);
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ret = regmap_write(data->regmap, BMG160_REG_SLOPE_THRES,
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data->slope_thres);
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if (ret < 0) {
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dev_err(&data->client->dev,
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"Error writing reg_slope_thres\n");
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return ret;
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}
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_MOTION_INTR,
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BMG160_INT_MOTION_X |
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BMG160_INT_MOTION_Y |
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BMG160_INT_MOTION_Z);
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ret = regmap_write(data->regmap, BMG160_REG_MOTION_INTR,
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BMG160_INT_MOTION_X | BMG160_INT_MOTION_Y |
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BMG160_INT_MOTION_Z);
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if (ret < 0) {
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dev_err(&data->client->dev,
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"Error writing reg_motion_intr\n");
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@ -331,10 +316,10 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
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* to set latched mode, we will be flooded anyway with INTR
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*/
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if (!data->dready_trigger_on) {
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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ret = regmap_write(data->regmap,
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BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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if (ret < 0) {
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dev_err(&data->client->dev,
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"Error writing reg_rst_latch\n");
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@ -342,14 +327,12 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
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}
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}
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_EN_0,
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BMG160_DATA_ENABLE_INT);
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ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
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BMG160_DATA_ENABLE_INT);
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} else
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_EN_0,
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0);
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} else {
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ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
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}
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_int_en0\n");
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@ -365,55 +348,39 @@ static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
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int ret;
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/* Enable/Disable INT_MAP1 mapping */
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ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_MAP_1);
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ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_1,
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BMG160_INT_MAP_1_BIT_NEW_DATA,
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(status ? BMG160_INT_MAP_1_BIT_NEW_DATA : 0));
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_int_map1\n");
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return ret;
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}
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if (status)
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ret |= BMG160_INT_MAP_1_BIT_NEW_DATA;
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else
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ret &= ~BMG160_INT_MAP_1_BIT_NEW_DATA;
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_MAP_1,
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ret);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_int_map1\n");
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dev_err(&data->client->dev, "Error updating bits in reg_int_map1\n");
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return ret;
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}
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if (status) {
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_NON_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_NON_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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if (ret < 0) {
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dev_err(&data->client->dev,
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"Error writing reg_rst_latch\n");
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return ret;
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}
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_EN_0,
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BMG160_DATA_ENABLE_INT);
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ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
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BMG160_DATA_ENABLE_INT);
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} else {
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/* Restore interrupt mode */
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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if (ret < 0) {
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dev_err(&data->client->dev,
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"Error writing reg_rst_latch\n");
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return ret;
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}
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_EN_0,
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0);
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ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
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}
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if (ret < 0) {
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@ -444,10 +411,8 @@ static int bmg160_set_scale(struct bmg160_data *data, int val)
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for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
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if (bmg160_scale_table[i].scale == val) {
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ret = i2c_smbus_write_byte_data(
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data->client,
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BMG160_REG_RANGE,
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bmg160_scale_table[i].dps_range);
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ret = regmap_write(data->regmap, BMG160_REG_RANGE,
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bmg160_scale_table[i].dps_range);
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if (ret < 0) {
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dev_err(&data->client->dev,
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"Error writing reg_range\n");
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@ -464,6 +429,7 @@ static int bmg160_set_scale(struct bmg160_data *data, int val)
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static int bmg160_get_temp(struct bmg160_data *data, int *val)
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{
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int ret;
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unsigned int raw_val;
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mutex_lock(&data->mutex);
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ret = bmg160_set_power_state(data, true);
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@ -472,7 +438,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
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return ret;
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}
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ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_TEMP);
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ret = regmap_read(data->regmap, BMG160_REG_TEMP, &raw_val);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_temp\n");
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bmg160_set_power_state(data, false);
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@ -480,7 +446,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
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return ret;
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}
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*val = sign_extend32(ret, 7);
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*val = sign_extend32(raw_val, 7);
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ret = bmg160_set_power_state(data, false);
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mutex_unlock(&data->mutex);
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if (ret < 0)
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@ -492,6 +458,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
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static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
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{
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int ret;
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unsigned int raw_val;
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mutex_lock(&data->mutex);
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ret = bmg160_set_power_state(data, true);
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@ -500,7 +467,8 @@ static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
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return ret;
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}
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ret = i2c_smbus_read_word_data(data->client, BMG160_AXIS_TO_REG(axis));
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ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(axis), &raw_val,
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2);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading axis %d\n", axis);
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bmg160_set_power_state(data, false);
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@ -508,7 +476,7 @@ static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
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return ret;
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}
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*val = sign_extend32(ret, 15);
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*val = sign_extend32(raw_val, 15);
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ret = bmg160_set_power_state(data, false);
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mutex_unlock(&data->mutex);
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if (ret < 0)
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@ -807,12 +775,13 @@ static irqreturn_t bmg160_trigger_handler(int irq, void *p)
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struct iio_dev *indio_dev = pf->indio_dev;
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struct bmg160_data *data = iio_priv(indio_dev);
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int bit, ret, i = 0;
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unsigned int val;
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mutex_lock(&data->mutex);
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for_each_set_bit(bit, indio_dev->active_scan_mask,
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indio_dev->masklength) {
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ret = i2c_smbus_read_word_data(data->client,
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BMG160_AXIS_TO_REG(bit));
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ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(bit),
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&val, 2);
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if (ret < 0) {
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mutex_unlock(&data->mutex);
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goto err;
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@ -840,10 +809,9 @@ static int bmg160_trig_try_reen(struct iio_trigger *trig)
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return 0;
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/* Set latched mode interrupt and clear any latched interrupt */
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ret = i2c_smbus_write_byte_data(data->client,
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BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
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BMG160_INT_MODE_LATCH_INT |
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BMG160_INT_MODE_LATCH_RESET);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_rst_latch\n");
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return ret;
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@ -907,33 +875,34 @@ static irqreturn_t bmg160_event_handler(int irq, void *private)
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struct bmg160_data *data = iio_priv(indio_dev);
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int ret;
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int dir;
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unsigned int val;
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ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_STATUS_2);
|
||||
ret = regmap_read(data->regmap, BMG160_REG_INT_STATUS_2, &val);
|
||||
if (ret < 0) {
|
||||
dev_err(&data->client->dev, "Error reading reg_int_status2\n");
|
||||
goto ack_intr_status;
|
||||
}
|
||||
|
||||
if (ret & 0x08)
|
||||
if (val & 0x08)
|
||||
dir = IIO_EV_DIR_RISING;
|
||||
else
|
||||
dir = IIO_EV_DIR_FALLING;
|
||||
|
||||
if (ret & BMG160_ANY_MOTION_BIT_X)
|
||||
if (val & BMG160_ANY_MOTION_BIT_X)
|
||||
iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
|
||||
0,
|
||||
IIO_MOD_X,
|
||||
IIO_EV_TYPE_ROC,
|
||||
dir),
|
||||
iio_get_time_ns());
|
||||
if (ret & BMG160_ANY_MOTION_BIT_Y)
|
||||
if (val & BMG160_ANY_MOTION_BIT_Y)
|
||||
iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
|
||||
0,
|
||||
IIO_MOD_Y,
|
||||
IIO_EV_TYPE_ROC,
|
||||
dir),
|
||||
iio_get_time_ns());
|
||||
if (ret & BMG160_ANY_MOTION_BIT_Z)
|
||||
if (val & BMG160_ANY_MOTION_BIT_Z)
|
||||
iio_push_event(indio_dev, IIO_MOD_EVENT_CODE(IIO_ANGL_VEL,
|
||||
0,
|
||||
IIO_MOD_Z,
|
||||
|
@ -943,10 +912,9 @@ static irqreturn_t bmg160_event_handler(int irq, void *private)
|
|||
|
||||
ack_intr_status:
|
||||
if (!data->dready_trigger_on) {
|
||||
ret = i2c_smbus_write_byte_data(data->client,
|
||||
BMG160_REG_INT_RST_LATCH,
|
||||
BMG160_INT_MODE_LATCH_INT |
|
||||
BMG160_INT_MODE_LATCH_RESET);
|
||||
ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
|
||||
BMG160_INT_MODE_LATCH_INT |
|
||||
BMG160_INT_MODE_LATCH_RESET);
|
||||
if (ret < 0)
|
||||
dev_err(&data->client->dev,
|
||||
"Error writing reg_rst_latch\n");
|
||||
|
@ -1038,6 +1006,14 @@ static int bmg160_probe(struct i2c_client *client,
|
|||
struct iio_dev *indio_dev;
|
||||
int ret;
|
||||
const char *name = NULL;
|
||||
struct regmap *regmap;
|
||||
|
||||
regmap = devm_regmap_init_i2c(client, &bmg160_regmap_i2c_conf);
|
||||
if (IS_ERR(regmap)) {
|
||||
dev_err(&client->dev, "Failed to register i2c regmap %d\n",
|
||||
(int)PTR_ERR(regmap));
|
||||
return PTR_ERR(regmap);
|
||||
}
|
||||
|
||||
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
||||
if (!indio_dev)
|
||||
|
|
Loading…
Reference in a new issue