[PATCH v2 0/6] iio: bmg160: Add SPI connection

[PATCH v2 0/6] iio: bmg160: Add SPI connection

[Markus Pargmann]

Hi,

bmg160 and bmi055 can be used via I2C and SPI. This series converts the driver
to regmap and splits core driver and I2C/SPI.

Changes in v2:
 - Added the id->name from the SPI driver to be used as iio device name
 - Fixed Kconfig in patch 2 to add selects for REGMAP_I2C
 - Fixed regmap configs to be static const

Best regards,

Markus


Markus Pargmann (6):
  iio: bmg160: Use i2c regmap instead of direct i2c access
  iio: bmg160: Remove i2c_client from data struct
  iio: bmg160: Use generic dev_drvdata
  iio: bmg160: Remove remaining uses of i2c_client
  iio: bmg160: Separate i2c and core driver
  iio: bmg160: Add SPI driver

 drivers/iio/gyro/Kconfig                     |  29 ++-
 drivers/iio/gyro/Makefile                    |   4 +-
 drivers/iio/gyro/bmg160.h                    |  10 +
 drivers/iio/gyro/{bmg160.c => bmg160_core.c} | 356 +++++++++++----------------
 drivers/iio/gyro/bmg160_i2c.c                |  73 ++++++
 drivers/iio/gyro/bmg160_spi.c                |  60 +++++
 6 files changed, 311 insertions(+), 221 deletions(-)
 create mode 100644 drivers/iio/gyro/bmg160.h
 rename drivers/iio/gyro/{bmg160.c => bmg160_core.c} (74%)
 create mode 100644 drivers/iio/gyro/bmg160_i2c.c
 create mode 100644 drivers/iio/gyro/bmg160_spi.c

-- 
2.1.4

[PATCH v2 1/6] iio: bmg160: Use i2c regmap instead of direct i2c access

[Markus Pargmann]

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>
---
 drivers/iio/gyro/Kconfig  |   2 +
 drivers/iio/gyro/bmg160.c | 200 +++++++++++++++++++++-------------------------
 2 files changed, 91 insertions(+), 111 deletions(-)

diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
index 8d2439345673..b44984b3bb24 100644
--- a/drivers/iio/gyro/Kconfig
+++ b/drivers/iio/gyro/Kconfig
@@ -55,6 +55,8 @@ config BMG160
 	depends on I2C
 	select IIO_BUFFER
 	select IIO_TRIGGERED_BUFFER
+	select REGMAP
+	select REGMAP_I2C
 	help
 	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
 	  driver. This driver also supports BMI055 gyroscope.
diff --git a/drivers/iio/gyro/bmg160.c b/drivers/iio/gyro/bmg160.c
index 460bf715d541..626f5c98dde8 100644
--- a/drivers/iio/gyro/bmg160.c
+++ b/drivers/iio/gyro/bmg160.c
@@ -28,6 +28,7 @@
 #include <linux/iio/events.h>
 #include <linux/iio/trigger_consumer.h>
 #include <linux/iio/triggered_buffer.h>
+#include <linux/regmap.h>
 
 #define BMG160_DRV_NAME		"bmg160"
 #define BMG160_IRQ_NAME		"bmg160_event"
@@ -98,6 +99,7 @@
 
 struct bmg160_data {
 	struct i2c_client *client;
+	struct regmap *regmap;
 	struct iio_trigger *dready_trig;
 	struct iio_trigger *motion_trig;
 	struct mutex mutex;
@@ -134,12 +136,19 @@ static const struct {
 			   { 133, BMG160_RANGE_250DPS},
 			   { 66, BMG160_RANGE_125DPS} };
 
+struct regmap_config bmg160_regmap_i2c_conf = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.use_single_rw = true,
+	.cache_type = REGCACHE_NONE,
+};
+
 static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
 {
 	int ret;
 
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMG160_REG_PMU_LPW, mode);
+	ret = regmap_write(data->regmap, BMG160_REG_PMU_LPW, mode);
 	if (ret < 0) {
 		dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n");
 		return ret;
@@ -169,8 +178,7 @@ static int bmg160_set_bw(struct bmg160_data *data, int val)
 	if (bw_bits < 0)
 		return bw_bits;
 
-	ret = i2c_smbus_write_byte_data(data->client, BMG160_REG_PMU_BW,
-					bw_bits);
+	ret = regmap_write(data->regmap, BMG160_REG_PMU_BW, bw_bits);
 	if (ret < 0) {
 		dev_err(&data->client->dev, "Error writing reg_pmu_bw\n");
 		return ret;
@@ -184,16 +192,17 @@ static int bmg160_set_bw(struct bmg160_data *data, int val)
 static int bmg160_chip_init(struct bmg160_data *data)
 {
 	int ret;
+	unsigned int val;
 
-	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_CHIP_ID);
+	ret = regmap_read(data->regmap, BMG160_REG_CHIP_ID, &val);
 	if (ret < 0) {
 		dev_err(&data->client->dev, "Error reading reg_chip_id\n");
 		return ret;
 	}
 
-	dev_dbg(&data->client->dev, "Chip Id %x\n", ret);
-	if (ret != BMG160_CHIP_ID_VAL) {
-		dev_err(&data->client->dev, "invalid chip %x\n", ret);
+	dev_dbg(&data->client->dev, "Chip Id %x\n", val);
+	if (val != BMG160_CHIP_ID_VAL) {
+		dev_err(&data->client->dev, "invalid chip %x\n", val);
 		return -ENODEV;
 	}
 
@@ -210,40 +219,31 @@ static int bmg160_chip_init(struct bmg160_data *data)
 		return ret;
 
 	/* Set Default Range */
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMG160_REG_RANGE,
-					BMG160_RANGE_500DPS);
+	ret = regmap_write(data->regmap, BMG160_REG_RANGE, BMG160_RANGE_500DPS);
 	if (ret < 0) {
 		dev_err(&data->client->dev, "Error writing reg_range\n");
 		return ret;
 	}
 	data->dps_range = BMG160_RANGE_500DPS;
 
-	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_SLOPE_THRES);
+	ret = regmap_read(data->regmap, BMG160_REG_SLOPE_THRES, &val);
 	if (ret < 0) {
 		dev_err(&data->client->dev, "Error reading reg_slope_thres\n");
 		return ret;
 	}
-	data->slope_thres = ret;
+	data->slope_thres = val;
 
 	/* Set default interrupt mode */
-	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_EN_1);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading reg_int_en_1\n");
-		return ret;
-	}
-	ret &= ~BMG160_INT1_BIT_OD;
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMG160_REG_INT_EN_1, ret);
+	ret = regmap_update_bits(data->regmap, BMG160_REG_INT_EN_1,
+				 BMG160_INT1_BIT_OD, 0);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_en_1\n");
+		dev_err(&data->client->dev, "Error updating bits in reg_int_en_1\n");
 		return ret;
 	}
 
-	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_motion_intr\n");
@@ -284,41 +284,28 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
 	int ret;
 
 	/* Enable/Disable INT_MAP0 mapping */
-	ret = i2c_smbus_read_byte_data(data->client,  BMG160_REG_INT_MAP_0);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading reg_int_map0\n");
-		return ret;
-	}
-	if (status)
-		ret |= BMG160_INT_MAP_0_BIT_ANY;
-	else
-		ret &= ~BMG160_INT_MAP_0_BIT_ANY;
-
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMG160_REG_INT_MAP_0,
-					ret);
+	ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_0,
+				 BMG160_INT_MAP_0_BIT_ANY,
+				 (status ? BMG160_INT_MAP_0_BIT_ANY : 0));
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_map0\n");
+		dev_err(&data->client->dev, "Error updating bits reg_int_map0\n");
 		return ret;
 	}
 
 	/* Enable/Disable slope interrupts */
 	if (status) {
 		/* Update slope thres */
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMG160_REG_SLOPE_THRES,
-						data->slope_thres);
+		ret = regmap_write(data->regmap, BMG160_REG_SLOPE_THRES,
+				   data->slope_thres);
 		if (ret < 0) {
 			dev_err(&data->client->dev,
 				"Error writing reg_slope_thres\n");
 			return ret;
 		}
 
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMG160_REG_MOTION_INTR,
-						BMG160_INT_MOTION_X |
-						BMG160_INT_MOTION_Y |
-						BMG160_INT_MOTION_Z);
+		ret = regmap_write(data->regmap, BMG160_REG_MOTION_INTR,
+				   BMG160_INT_MOTION_X | BMG160_INT_MOTION_Y |
+				   BMG160_INT_MOTION_Z);
 		if (ret < 0) {
 			dev_err(&data->client->dev,
 				"Error writing reg_motion_intr\n");
@@ -331,10 +318,10 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
 		 * to set latched mode, we will be flooded anyway with INTR
 		 */
 		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");
@@ -342,14 +329,12 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
 			}
 		}
 
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMG160_REG_INT_EN_0,
-						BMG160_DATA_ENABLE_INT);
+		ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
+				   BMG160_DATA_ENABLE_INT);
 
-	} else
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMG160_REG_INT_EN_0,
-						0);
+	} else {
+		ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
+	}
 
 	if (ret < 0) {
 		dev_err(&data->client->dev, "Error writing reg_int_en0\n");
@@ -365,55 +350,39 @@ static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
 	int ret;
 
 	/* Enable/Disable INT_MAP1 mapping */
-	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_MAP_1);
-	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading reg_int_map1\n");
-		return ret;
-	}
-
-	if (status)
-		ret |= BMG160_INT_MAP_1_BIT_NEW_DATA;
-	else
-		ret &= ~BMG160_INT_MAP_1_BIT_NEW_DATA;
-
-	ret = i2c_smbus_write_byte_data(data->client,
-					BMG160_REG_INT_MAP_1,
-					ret);
+	ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_1,
+				 BMG160_INT_MAP_1_BIT_NEW_DATA,
+				 (status ? BMG160_INT_MAP_1_BIT_NEW_DATA : 0));
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_map1\n");
+		dev_err(&data->client->dev, "Error updating bits in reg_int_map1\n");
 		return ret;
 	}
 
 	if (status) {
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMG160_REG_INT_RST_LATCH,
-						BMG160_INT_MODE_NON_LATCH_INT |
-						BMG160_INT_MODE_LATCH_RESET);
+		ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
+				   BMG160_INT_MODE_NON_LATCH_INT |
+				   BMG160_INT_MODE_LATCH_RESET);
 		if (ret < 0) {
 			dev_err(&data->client->dev,
 				"Error writing reg_rst_latch\n");
 				return ret;
 		}
 
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMG160_REG_INT_EN_0,
-						BMG160_DATA_ENABLE_INT);
+		ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
+				   BMG160_DATA_ENABLE_INT);
 
 	} else {
 		/* Restore interrupt mode */
-		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");
 				return ret;
 		}
 
-		ret = i2c_smbus_write_byte_data(data->client,
-						BMG160_REG_INT_EN_0,
-						0);
+		ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
 	}
 
 	if (ret < 0) {
@@ -444,10 +413,8 @@ static int bmg160_set_scale(struct bmg160_data *data, int val)
 
 	for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
 		if (bmg160_scale_table[i].scale == val) {
-			ret = i2c_smbus_write_byte_data(
-					data->client,
-					BMG160_REG_RANGE,
-					bmg160_scale_table[i].dps_range);
+			ret = regmap_write(data->regmap, BMG160_REG_RANGE,
+					   bmg160_scale_table[i].dps_range);
 			if (ret < 0) {
 				dev_err(&data->client->dev,
 					"Error writing reg_range\n");
@@ -464,6 +431,7 @@ static int bmg160_set_scale(struct bmg160_data *data, int val)
 static int bmg160_get_temp(struct bmg160_data *data, int *val)
 {
 	int ret;
+	unsigned int raw_val;
 
 	mutex_lock(&data->mutex);
 	ret = bmg160_set_power_state(data, true);
@@ -472,7 +440,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
 		return ret;
 	}
 
-	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_TEMP);
+	ret = regmap_read(data->regmap, BMG160_REG_TEMP, &raw_val);
 	if (ret < 0) {
 		dev_err(&data->client->dev, "Error reading reg_temp\n");
 		bmg160_set_power_state(data, false);
@@ -480,7 +448,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
 		return ret;
 	}
 
-	*val = sign_extend32(ret, 7);
+	*val = sign_extend32(raw_val, 7);
 	ret = bmg160_set_power_state(data, false);
 	mutex_unlock(&data->mutex);
 	if (ret < 0)
@@ -492,6 +460,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
 static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
 {
 	int ret;
+	unsigned int raw_val;
 
 	mutex_lock(&data->mutex);
 	ret = bmg160_set_power_state(data, true);
@@ -500,7 +469,8 @@ static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
 		return ret;
 	}
 
-	ret = i2c_smbus_read_word_data(data->client, BMG160_AXIS_TO_REG(axis));
+	ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(axis), &raw_val,
+			       2);
 	if (ret < 0) {
 		dev_err(&data->client->dev, "Error reading axis %d\n", axis);
 		bmg160_set_power_state(data, false);
@@ -508,7 +478,7 @@ static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
 		return ret;
 	}
 
-	*val = sign_extend32(ret, 15);
+	*val = sign_extend32(raw_val, 15);
 	ret = bmg160_set_power_state(data, false);
 	mutex_unlock(&data->mutex);
 	if (ret < 0)
@@ -807,12 +777,13 @@ static irqreturn_t bmg160_trigger_handler(int irq, void *p)
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct bmg160_data *data = iio_priv(indio_dev);
 	int bit, ret, i = 0;
+	unsigned int 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,
-					       BMG160_AXIS_TO_REG(bit));
+		ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(bit),
+				       &val, 2);
 		if (ret < 0) {
 			mutex_unlock(&data->mutex);
 			goto err;
@@ -840,10 +811,9 @@ static int bmg160_trig_try_reen(struct iio_trigger *trig)
 		return 0;
 
 	/* Set latched mode interrupt and clear any latched interrupt */
-	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");
 		return ret;
@@ -907,33 +877,34 @@ static irqreturn_t bmg160_event_handler(int irq, void *private)
 	struct bmg160_data *data = iio_priv(indio_dev);
 	int ret;
 	int dir;
+	unsigned int val;
 
-	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 +914,9 @@ 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 +1008,14 @@ 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)
-- 
2.1.4

[PATCH v2 2/6] iio: bmg160: Remove i2c_client from data struct

[Markus Pargmann]

i2c_client variable is not really used anymore in the core driver. It is
only used to get the device to make proper outputs.

This patch replaces all i2c_client usage through direct usage of the
device pointer.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
 drivers/iio/gyro/bmg160.c | 64 +++++++++++++++++++++++------------------------
 1 file changed, 32 insertions(+), 32 deletions(-)

diff --git a/drivers/iio/gyro/bmg160.c b/drivers/iio/gyro/bmg160.c
index 626f5c98dde8..71c605ea85ad 100644
--- a/drivers/iio/gyro/bmg160.c
+++ b/drivers/iio/gyro/bmg160.c
@@ -98,7 +98,7 @@
 #define BMG160_AUTO_SUSPEND_DELAY_MS	2000
 
 struct bmg160_data {
-	struct i2c_client *client;
+	struct device *dev;
 	struct regmap *regmap;
 	struct iio_trigger *dready_trig;
 	struct iio_trigger *motion_trig;
@@ -150,7 +150,7 @@ static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
 
 	ret = regmap_write(data->regmap, BMG160_REG_PMU_LPW, mode);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n");
+		dev_err(data->dev, "Error writing reg_pmu_lpw\n");
 		return ret;
 	}
 
@@ -180,7 +180,7 @@ static int bmg160_set_bw(struct bmg160_data *data, int val)
 
 	ret = regmap_write(data->regmap, BMG160_REG_PMU_BW, bw_bits);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_pmu_bw\n");
+		dev_err(data->dev, "Error writing reg_pmu_bw\n");
 		return ret;
 	}
 
@@ -196,13 +196,13 @@ static int bmg160_chip_init(struct bmg160_data *data)
 
 	ret = regmap_read(data->regmap, BMG160_REG_CHIP_ID, &val);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading reg_chip_id\n");
+		dev_err(data->dev, "Error reading reg_chip_id\n");
 		return ret;
 	}
 
-	dev_dbg(&data->client->dev, "Chip Id %x\n", val);
+	dev_dbg(data->dev, "Chip Id %x\n", val);
 	if (val != BMG160_CHIP_ID_VAL) {
-		dev_err(&data->client->dev, "invalid chip %x\n", val);
+		dev_err(data->dev, "invalid chip %x\n", val);
 		return -ENODEV;
 	}
 
@@ -221,14 +221,14 @@ static int bmg160_chip_init(struct bmg160_data *data)
 	/* Set Default Range */
 	ret = regmap_write(data->regmap, BMG160_REG_RANGE, BMG160_RANGE_500DPS);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_range\n");
+		dev_err(data->dev, "Error writing reg_range\n");
 		return ret;
 	}
 	data->dps_range = BMG160_RANGE_500DPS;
 
 	ret = regmap_read(data->regmap, BMG160_REG_SLOPE_THRES, &val);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading reg_slope_thres\n");
+		dev_err(data->dev, "Error reading reg_slope_thres\n");
 		return ret;
 	}
 	data->slope_thres = val;
@@ -237,7 +237,7 @@ static int bmg160_chip_init(struct bmg160_data *data)
 	ret = regmap_update_bits(data->regmap, BMG160_REG_INT_EN_1,
 				 BMG160_INT1_BIT_OD, 0);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error updating bits in reg_int_en_1\n");
+		dev_err(data->dev, "Error updating bits in reg_int_en_1\n");
 		return ret;
 	}
 
@@ -245,7 +245,7 @@ static int bmg160_chip_init(struct bmg160_data *data)
 			   BMG160_INT_MODE_LATCH_INT |
 			   BMG160_INT_MODE_LATCH_RESET);
 	if (ret < 0) {
-		dev_err(&data->client->dev,
+		dev_err(data->dev,
 			"Error writing reg_motion_intr\n");
 		return ret;
 	}
@@ -259,17 +259,17 @@ static int bmg160_set_power_state(struct bmg160_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: bmg160_set_power_state for %d\n", on);
 		if (on)
-			pm_runtime_put_noidle(&data->client->dev);
+			pm_runtime_put_noidle(data->dev);
 
 		return ret;
 	}
@@ -288,7 +288,7 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
 				 BMG160_INT_MAP_0_BIT_ANY,
 				 (status ? BMG160_INT_MAP_0_BIT_ANY : 0));
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error updating bits reg_int_map0\n");
+		dev_err(data->dev, "Error updating bits reg_int_map0\n");
 		return ret;
 	}
 
@@ -298,7 +298,7 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
 		ret = regmap_write(data->regmap, BMG160_REG_SLOPE_THRES,
 				   data->slope_thres);
 		if (ret < 0) {
-			dev_err(&data->client->dev,
+			dev_err(data->dev,
 				"Error writing reg_slope_thres\n");
 			return ret;
 		}
@@ -307,7 +307,7 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
 				   BMG160_INT_MOTION_X | BMG160_INT_MOTION_Y |
 				   BMG160_INT_MOTION_Z);
 		if (ret < 0) {
-			dev_err(&data->client->dev,
+			dev_err(data->dev,
 				"Error writing reg_motion_intr\n");
 			return ret;
 		}
@@ -323,7 +323,7 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
 					   BMG160_INT_MODE_LATCH_INT |
 					   BMG160_INT_MODE_LATCH_RESET);
 			if (ret < 0) {
-				dev_err(&data->client->dev,
+				dev_err(data->dev,
 					"Error writing reg_rst_latch\n");
 				return ret;
 			}
@@ -337,7 +337,7 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
 	}
 
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_en0\n");
+		dev_err(data->dev, "Error writing reg_int_en0\n");
 		return ret;
 	}
 
@@ -354,7 +354,7 @@ static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
 				 BMG160_INT_MAP_1_BIT_NEW_DATA,
 				 (status ? BMG160_INT_MAP_1_BIT_NEW_DATA : 0));
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error updating bits in reg_int_map1\n");
+		dev_err(data->dev, "Error updating bits in reg_int_map1\n");
 		return ret;
 	}
 
@@ -363,7 +363,7 @@ static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
 				   BMG160_INT_MODE_NON_LATCH_INT |
 				   BMG160_INT_MODE_LATCH_RESET);
 		if (ret < 0) {
-			dev_err(&data->client->dev,
+			dev_err(data->dev,
 				"Error writing reg_rst_latch\n");
 				return ret;
 		}
@@ -377,7 +377,7 @@ static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
 				   BMG160_INT_MODE_LATCH_INT |
 				   BMG160_INT_MODE_LATCH_RESET);
 		if (ret < 0) {
-			dev_err(&data->client->dev,
+			dev_err(data->dev,
 				"Error writing reg_rst_latch\n");
 				return ret;
 		}
@@ -386,7 +386,7 @@ static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
 	}
 
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_int_en0\n");
+		dev_err(data->dev, "Error writing reg_int_en0\n");
 		return ret;
 	}
 
@@ -416,7 +416,7 @@ static int bmg160_set_scale(struct bmg160_data *data, int val)
 			ret = regmap_write(data->regmap, BMG160_REG_RANGE,
 					   bmg160_scale_table[i].dps_range);
 			if (ret < 0) {
-				dev_err(&data->client->dev,
+				dev_err(data->dev,
 					"Error writing reg_range\n");
 				return ret;
 			}
@@ -442,7 +442,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
 
 	ret = regmap_read(data->regmap, BMG160_REG_TEMP, &raw_val);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading reg_temp\n");
+		dev_err(data->dev, "Error reading reg_temp\n");
 		bmg160_set_power_state(data, false);
 		mutex_unlock(&data->mutex);
 		return ret;
@@ -472,7 +472,7 @@ static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
 	ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(axis), &raw_val,
 			       2);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error reading axis %d\n", axis);
+		dev_err(data->dev, "Error reading axis %d\n", axis);
 		bmg160_set_power_state(data, false);
 		mutex_unlock(&data->mutex);
 		return ret;
@@ -815,7 +815,7 @@ static int bmg160_trig_try_reen(struct iio_trigger *trig)
 			   BMG160_INT_MODE_LATCH_INT |
 			   BMG160_INT_MODE_LATCH_RESET);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "Error writing reg_rst_latch\n");
+		dev_err(data->dev, "Error writing reg_rst_latch\n");
 		return ret;
 	}
 
@@ -881,7 +881,7 @@ static irqreturn_t bmg160_event_handler(int irq, void *private)
 
 	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");
+		dev_err(data->dev, "Error reading reg_int_status2\n");
 		goto ack_intr_status;
 	}
 
@@ -918,7 +918,7 @@ ack_intr_status:
 				   BMG160_INT_MODE_LATCH_INT |
 				   BMG160_INT_MODE_LATCH_RESET);
 		if (ret < 0)
-			dev_err(&data->client->dev,
+			dev_err(data->dev,
 				"Error writing reg_rst_latch\n");
 	}
 
@@ -1023,7 +1023,7 @@ static int bmg160_probe(struct i2c_client *client,
 
 	data = iio_priv(indio_dev);
 	i2c_set_clientdata(client, indio_dev);
-	data->client = client;
+	data->dev = &client->dev;
 
 	ret = bmg160_chip_init(data);
 	if (ret < 0)
@@ -1190,7 +1190,7 @@ static int bmg160_runtime_suspend(struct device *dev)
 
 	ret = bmg160_set_mode(data, BMG160_MODE_SUSPEND);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "set mode failed\n");
+		dev_err(data->dev, "set mode failed\n");
 		return -EAGAIN;
 	}
 
-- 
2.1.4

[PATCH v2 3/6] iio: bmg160: Use generic dev_drvdata

[Markus Pargmann]

i2c_get_clientdata() is specifically for i2c. Replace it with the
generic dev_get/set_drvdata() to support different protocols.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
 drivers/iio/gyro/bmg160.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/gyro/bmg160.c b/drivers/iio/gyro/bmg160.c
index 71c605ea85ad..b47b7af19e32 100644
--- a/drivers/iio/gyro/bmg160.c
+++ b/drivers/iio/gyro/bmg160.c
@@ -1022,7 +1022,7 @@ static int bmg160_probe(struct i2c_client *client,
 		return -ENOMEM;
 
 	data = iio_priv(indio_dev);
-	i2c_set_clientdata(client, indio_dev);
+	dev_set_drvdata(&client->dev, indio_dev);
 	data->dev = &client->dev;
 
 	ret = bmg160_chip_init(data);
@@ -1156,7 +1156,7 @@ static int bmg160_remove(struct i2c_client *client)
 #ifdef CONFIG_PM_SLEEP
 static int bmg160_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 bmg160_data *data = iio_priv(indio_dev);
 
 	mutex_lock(&data->mutex);
@@ -1168,7 +1168,7 @@ static int bmg160_suspend(struct device *dev)
 
 static int bmg160_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 bmg160_data *data = iio_priv(indio_dev);
 
 	mutex_lock(&data->mutex);
@@ -1184,7 +1184,7 @@ static int bmg160_resume(struct device *dev)
 #ifdef CONFIG_PM
 static int bmg160_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 bmg160_data *data = iio_priv(indio_dev);
 	int ret;
 
@@ -1199,7 +1199,7 @@ static int bmg160_runtime_suspend(struct device *dev)
 
 static int bmg160_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 bmg160_data *data = iio_priv(indio_dev);
 	int ret;
 
-- 
2.1.4

[PATCH v2 4/6] iio: bmg160: Remove remaining uses of i2c_client

[Markus Pargmann]

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
 drivers/iio/gyro/bmg160.c | 55 +++++++++++++++++++++++------------------------
 1 file changed, 27 insertions(+), 28 deletions(-)

diff --git a/drivers/iio/gyro/bmg160.c b/drivers/iio/gyro/bmg160.c
index b47b7af19e32..865ef4c1c43f 100644
--- a/drivers/iio/gyro/bmg160.c
+++ b/drivers/iio/gyro/bmg160.c
@@ -110,6 +110,7 @@ struct bmg160_data {
 	int slope_thres;
 	bool dready_trigger_on;
 	bool motion_trigger_on;
+	int irq;
 };
 
 enum bmg160_axis {
@@ -963,18 +964,14 @@ static const struct iio_buffer_setup_ops bmg160_buffer_setup_ops = {
 	.postdisable = bmg160_buffer_postdisable,
 };
 
-static int bmg160_gpio_probe(struct i2c_client *client,
-			     struct bmg160_data *data)
+static int bmg160_gpio_probe(struct bmg160_data *data)
 
 {
 	struct device *dev;
 	struct gpio_desc *gpio;
 	int ret;
 
-	if (!client)
-		return -EINVAL;
-
-	dev = &client->dev;
+	dev = data->dev;
 
 	/* data ready gpio interrupt pin */
 	gpio = devm_gpiod_get_index(dev, BMG160_GPIO_NAME, 0, GPIOD_IN);
@@ -983,11 +980,11 @@ static int bmg160_gpio_probe(struct i2c_client *client,
 		return PTR_ERR(gpio);
 	}
 
-	ret = gpiod_to_irq(gpio);
+	data->irq = gpiod_to_irq(gpio);
 
 	dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
 
-	return ret;
+	return 0;
 }
 
 static const char *bmg160_match_acpi_device(struct device *dev)
@@ -1009,6 +1006,7 @@ static int bmg160_probe(struct i2c_client *client,
 	int ret;
 	const char *name = NULL;
 	struct regmap *regmap;
+	struct device *dev = &client->dev;
 
 	regmap = devm_regmap_init_i2c(client, &bmg160_regmap_i2c_conf);
 	if (IS_ERR(regmap)) {
@@ -1022,8 +1020,9 @@ static int bmg160_probe(struct i2c_client *client,
 		return -ENOMEM;
 
 	data = iio_priv(indio_dev);
-	dev_set_drvdata(&client->dev, indio_dev);
-	data->dev = &client->dev;
+	dev_set_drvdata(dev, indio_dev);
+	data->dev = dev;
+	data->irq = client->irq;
 
 	ret = bmg160_chip_init(data);
 	if (ret < 0)
@@ -1034,22 +1033,22 @@ static int bmg160_probe(struct i2c_client *client,
 	if (id)
 		name = id->name;
 
-	if (ACPI_HANDLE(&client->dev))
-		name = bmg160_match_acpi_device(&client->dev);
+	if (ACPI_HANDLE(dev))
+		name = bmg160_match_acpi_device(dev);
 
-	indio_dev->dev.parent = &client->dev;
+	indio_dev->dev.parent = dev;
 	indio_dev->channels = bmg160_channels;
 	indio_dev->num_channels = ARRAY_SIZE(bmg160_channels);
 	indio_dev->name = name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &bmg160_info;
 
-	if (client->irq <= 0)
-		client->irq = bmg160_gpio_probe(client, data);
+	if (data->irq <= 0)
+		bmg160_gpio_probe(data);
 
-	if (client->irq > 0) {
-		ret = devm_request_threaded_irq(&client->dev,
-						client->irq,
+	if (data->irq > 0) {
+		ret = devm_request_threaded_irq(dev,
+						data->irq,
 						bmg160_data_rdy_trig_poll,
 						bmg160_event_handler,
 						IRQF_TRIGGER_RISING,
@@ -1058,28 +1057,28 @@ static int bmg160_probe(struct i2c_client *client,
 		if (ret)
 			return ret;
 
-		data->dready_trig = devm_iio_trigger_alloc(&client->dev,
+		data->dready_trig = devm_iio_trigger_alloc(dev,
 							   "%s-dev%d",
 							   indio_dev->name,
 							   indio_dev->id);
 		if (!data->dready_trig)
 			return -ENOMEM;
 
-		data->motion_trig = devm_iio_trigger_alloc(&client->dev,
+		data->motion_trig = devm_iio_trigger_alloc(dev,
 							  "%s-any-motion-dev%d",
 							  indio_dev->name,
 							  indio_dev->id);
 		if (!data->motion_trig)
 			return -ENOMEM;
 
-		data->dready_trig->dev.parent = &client->dev;
+		data->dready_trig->dev.parent = dev;
 		data->dready_trig->ops = &bmg160_trigger_ops;
 		iio_trigger_set_drvdata(data->dready_trig, indio_dev);
 		ret = iio_trigger_register(data->dready_trig);
 		if (ret)
 			return ret;
 
-		data->motion_trig->dev.parent = &client->dev;
+		data->motion_trig->dev.parent = dev;
 		data->motion_trig->ops = &bmg160_trigger_ops;
 		iio_trigger_set_drvdata(data->motion_trig, indio_dev);
 		ret = iio_trigger_register(data->motion_trig);
@@ -1094,25 +1093,25 @@ static int bmg160_probe(struct i2c_client *client,
 					 bmg160_trigger_handler,
 					 &bmg160_buffer_setup_ops);
 	if (ret < 0) {
-		dev_err(&client->dev,
+		dev_err(dev,
 			"iio triggered buffer setup failed\n");
 		goto err_trigger_unregister;
 	}
 
 	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;
 	}
 
-	ret = pm_runtime_set_active(&client->dev);
+	ret = pm_runtime_set_active(dev);
 	if (ret)
 		goto err_iio_unregister;
 
-	pm_runtime_enable(&client->dev);
-	pm_runtime_set_autosuspend_delay(&client->dev,
+	pm_runtime_enable(dev);
+	pm_runtime_set_autosuspend_delay(dev,
 					 BMG160_AUTO_SUSPEND_DELAY_MS);
-	pm_runtime_use_autosuspend(&client->dev);
+	pm_runtime_use_autosuspend(dev);
 
 	return 0;
 
-- 
2.1.4

[PATCH v2 5/6] iio: bmg160: Separate i2c and core driver

[Markus Pargmann]

This patch separates the core driver using regmap and the i2c driver
which creates the i2c regmap. Also in the Kconfig file BMG160 and
BMG160_I2C are separate now.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
 drivers/iio/gyro/Kconfig                     | 18 +++++--
 drivers/iio/gyro/Makefile                    |  3 +-
 drivers/iio/gyro/bmg160.h                    | 10 ++++
 drivers/iio/gyro/{bmg160.c => bmg160_core.c} | 77 ++++------------------------
 drivers/iio/gyro/bmg160_i2c.c                | 73 ++++++++++++++++++++++++++
 5 files changed, 110 insertions(+), 71 deletions(-)
 create mode 100644 drivers/iio/gyro/bmg160.h
 rename drivers/iio/gyro/{bmg160.c => bmg160_core.c} (94%)
 create mode 100644 drivers/iio/gyro/bmg160_i2c.c

diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
index b44984b3bb24..1e6cfff5546f 100644
--- a/drivers/iio/gyro/Kconfig
+++ b/drivers/iio/gyro/Kconfig
@@ -51,18 +51,28 @@ config ADXRS450
 	  will be called adxrs450.
 
 config BMG160
-	tristate "BOSCH BMG160 Gyro Sensor"
-	depends on I2C
+	bool "BOSCH BMG160 Gyro Sensor"
 	select IIO_BUFFER
 	select IIO_TRIGGERED_BUFFER
 	select REGMAP
-	select REGMAP_I2C
 	help
 	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
 	  driver. This driver also supports BMI055 gyroscope.
 
+if BMG160
+
+config BMG160_I2C
+	tristate "Driver for connection via I2C"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
+	  driver connected via I2C. This driver also supports BMI055 gyroscope.
+
 	  This driver can also be built as a module.  If so, the module
-	  will be called bmg160.
+	  will be called bmg160_i2c.
+
+endif
 
 config HID_SENSOR_GYRO_3D
 	depends on HID_SENSOR_HUB
diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile
index f46341b39139..608401041550 100644
--- a/drivers/iio/gyro/Makefile
+++ b/drivers/iio/gyro/Makefile
@@ -8,7 +8,8 @@ obj-$(CONFIG_ADIS16130) += adis16130.o
 obj-$(CONFIG_ADIS16136) += adis16136.o
 obj-$(CONFIG_ADIS16260) += adis16260.o
 obj-$(CONFIG_ADXRS450) += adxrs450.o
-obj-$(CONFIG_BMG160) += bmg160.o
+obj-$(CONFIG_BMG160) += bmg160_core.o
+obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
 
 obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
 
diff --git a/drivers/iio/gyro/bmg160.h b/drivers/iio/gyro/bmg160.h
new file mode 100644
index 000000000000..72db723c8fb6
--- /dev/null
+++ b/drivers/iio/gyro/bmg160.h
@@ -0,0 +1,10 @@
+#ifndef BMG160_H_
+#define BMG160_H_
+
+extern const struct dev_pm_ops bmg160_pm_ops;
+
+int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
+		      const char *name);
+void bmg160_core_remove(struct device *dev);
+
+#endif  /* BMG160_H_ */
diff --git a/drivers/iio/gyro/bmg160.c b/drivers/iio/gyro/bmg160_core.c
similarity index 94%
rename from drivers/iio/gyro/bmg160.c
rename to drivers/iio/gyro/bmg160_core.c
index 865ef4c1c43f..ba37db5d491a 100644
--- a/drivers/iio/gyro/bmg160.c
+++ b/drivers/iio/gyro/bmg160_core.c
@@ -13,7 +13,6 @@
  */
 
 #include <linux/module.h>
-#include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
@@ -30,7 +29,6 @@
 #include <linux/iio/triggered_buffer.h>
 #include <linux/regmap.h>
 
-#define BMG160_DRV_NAME		"bmg160"
 #define BMG160_IRQ_NAME		"bmg160_event"
 #define BMG160_GPIO_NAME		"gpio_int"
 
@@ -137,14 +135,6 @@ static const struct {
 			   { 133, BMG160_RANGE_250DPS},
 			   { 66, BMG160_RANGE_125DPS} };
 
-struct regmap_config bmg160_regmap_i2c_conf = {
-	.reg_bits = 8,
-	.val_bits = 8,
-
-	.use_single_rw = true,
-	.cache_type = REGCACHE_NONE,
-};
-
 static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
 {
 	int ret;
@@ -998,31 +988,22 @@ static const char *bmg160_match_acpi_device(struct device *dev)
 	return dev_name(dev);
 }
 
-static int bmg160_probe(struct i2c_client *client,
-			const struct i2c_device_id *id)
+int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
+		      const char *name)
 {
 	struct bmg160_data *data;
 	struct iio_dev *indio_dev;
 	int ret;
-	const char *name = NULL;
-	struct regmap *regmap;
-	struct device *dev = &client->dev;
-
-	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));
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
 	if (!indio_dev)
 		return -ENOMEM;
 
 	data = iio_priv(indio_dev);
 	dev_set_drvdata(dev, indio_dev);
 	data->dev = dev;
-	data->irq = client->irq;
+	data->irq = irq;
+	data->regmap = regmap;
 
 	ret = bmg160_chip_init(data);
 	if (ret < 0)
@@ -1030,9 +1011,6 @@ static int bmg160_probe(struct i2c_client *client,
 
 	mutex_init(&data->mutex);
 
-	if (id)
-		name = id->name;
-
 	if (ACPI_HANDLE(dev))
 		name = bmg160_match_acpi_device(dev);
 
@@ -1128,14 +1106,14 @@ err_trigger_unregister:
 	return ret;
 }
 
-static int bmg160_remove(struct i2c_client *client)
+void bmg160_core_remove(struct device *dev)
 {
-	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct bmg160_data *data = iio_priv(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_device_unregister(indio_dev);
 	iio_triggered_buffer_cleanup(indio_dev);
@@ -1148,8 +1126,6 @@ static int bmg160_remove(struct i2c_client *client)
 	mutex_lock(&data->mutex);
 	bmg160_set_mode(data, BMG160_MODE_DEEP_SUSPEND);
 	mutex_unlock(&data->mutex);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -1212,40 +1188,9 @@ static int bmg160_runtime_resume(struct device *dev)
 }
 #endif
 
-static const struct dev_pm_ops bmg160_pm_ops = {
+const struct dev_pm_ops bmg160_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(bmg160_suspend, bmg160_resume)
 	SET_RUNTIME_PM_OPS(bmg160_runtime_suspend,
 			   bmg160_runtime_resume, NULL)
 };
 
-static const struct acpi_device_id bmg160_acpi_match[] = {
-	{"BMG0160", 0},
-	{"BMI055B", 0},
-	{},
-};
-
-MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
-
-static const struct i2c_device_id bmg160_id[] = {
-	{"bmg160", 0},
-	{"bmi055_gyro", 0},
-	{}
-};
-
-MODULE_DEVICE_TABLE(i2c, bmg160_id);
-
-static struct i2c_driver bmg160_driver = {
-	.driver = {
-		.name	= BMG160_DRV_NAME,
-		.acpi_match_table = ACPI_PTR(bmg160_acpi_match),
-		.pm	= &bmg160_pm_ops,
-	},
-	.probe		= bmg160_probe,
-	.remove		= bmg160_remove,
-	.id_table	= bmg160_id,
-};
-module_i2c_driver(bmg160_driver);
-
-MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("BMG160 Gyro driver");
diff --git a/drivers/iio/gyro/bmg160_i2c.c b/drivers/iio/gyro/bmg160_i2c.c
new file mode 100644
index 000000000000..4a39dff13cf2
--- /dev/null
+++ b/drivers/iio/gyro/bmg160_i2c.c
@@ -0,0 +1,73 @@
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+
+#include "bmg160.h"
+
+static const struct regmap_config bmg160_regmap_i2c_conf = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.use_single_rw = true,
+	.cache_type = REGCACHE_NONE,
+};
+
+static int bmg160_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, &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);
+	}
+
+	if (id)
+		name = id->name;
+
+	return bmg160_core_probe(&client->dev, regmap, client->irq, name);
+}
+
+static int bmg160_i2c_remove(struct i2c_client *client)
+{
+	bmg160_core_remove(&client->dev);
+
+	return 0;
+}
+
+static const struct acpi_device_id bmg160_acpi_match[] = {
+	{"BMG0160", 0},
+	{"BMI055B", 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
+
+static const struct i2c_device_id bmg160_i2c_id[] = {
+	{"bmg160", 0},
+	{"bmi055_gyro", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, bmg160_i2c_id);
+
+static struct i2c_driver bmg160_i2c_driver = {
+	.driver = {
+		.name	= "bmg160_i2c",
+		.acpi_match_table = ACPI_PTR(bmg160_acpi_match),
+		.pm	= &bmg160_pm_ops,
+	},
+	.probe		= bmg160_i2c_probe,
+	.remove		= bmg160_i2c_remove,
+	.id_table	= bmg160_i2c_id,
+};
+module_i2c_driver(bmg160_i2c_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMG160 I2C Gyro driver");
-- 
2.1.4

[PATCH v2 6/6] iio: bmg160: Add SPI driver

[Markus Pargmann]

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
 drivers/iio/gyro/Kconfig      | 11 ++++++++
 drivers/iio/gyro/Makefile     |  1 +
 drivers/iio/gyro/bmg160_spi.c | 60 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+)
 create mode 100644 drivers/iio/gyro/bmg160_spi.c

diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
index 1e6cfff5546f..420aea844216 100644
--- a/drivers/iio/gyro/Kconfig
+++ b/drivers/iio/gyro/Kconfig
@@ -72,6 +72,17 @@ config BMG160_I2C
 	  This driver can also be built as a module.  If so, the module
 	  will be called bmg160_i2c.
 
+config BMG160_SPI
+	tristate "Driver for connection via SPI"
+	depends on SPI
+	select REGMAP_SPI
+	help
+	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
+	  driver connected via SPI. This driver also supports BMI055 gyroscope.
+
+	  This driver can also be built as a module.  If so, the module
+	  will be called bmg160_spi.
+
 endif
 
 config HID_SENSOR_GYRO_3D
diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile
index 608401041550..f866a4be0667 100644
--- a/drivers/iio/gyro/Makefile
+++ b/drivers/iio/gyro/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_ADIS16260) += adis16260.o
 obj-$(CONFIG_ADXRS450) += adxrs450.o
 obj-$(CONFIG_BMG160) += bmg160_core.o
 obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
+obj-$(CONFIG_BMG160_SPI) += bmg160_spi.o
 
 obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
 
diff --git a/drivers/iio/gyro/bmg160_spi.c b/drivers/iio/gyro/bmg160_spi.c
new file mode 100644
index 000000000000..4dcef65f3476
--- /dev/null
+++ b/drivers/iio/gyro/bmg160_spi.c
@@ -0,0 +1,60 @@
+#include <linux/spi/spi.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+
+#include <bmg160.h>
+
+static const struct regmap_config bmg160_regmap_spi_conf = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.read_flag_mask = 0x80,
+
+	.use_single_rw = true,
+	.cache_type = REGCACHE_NONE,
+};
+
+static int bmg160_spi_probe(struct spi_device *spi)
+{
+	struct regmap *regmap;
+	const struct spi_device_id *id = spi_get_device_id(spi);
+
+	regmap = devm_regmap_init_spi(spi, &bmg160_regmap_spi_conf);
+	if (IS_ERR(regmap)) {
+		dev_err(&spi->dev, "Failed to register spi regmap %d\n",
+			(int)PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
+
+	return bmg160_core_probe(&spi->dev, regmap, spi->irq, id->name);
+}
+
+static int bmg160_spi_remove(struct spi_device *spi)
+{
+	bmg160_core_remove(&spi->dev);
+
+	return 0;
+}
+
+static const struct spi_device_id bmg160_spi_id[] = {
+	{"bmg160", 0},
+	{"bmi055_gyro", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(spi, bmg160_spi_id);
+
+static struct spi_driver bmg160_spi_driver = {
+	.driver = {
+		.name	= "bmg160_spi",
+		.pm	= &bmg160_pm_ops,
+	},
+	.probe		= bmg160_spi_probe,
+	.remove		= bmg160_spi_remove,
+	.id_table	= bmg160_spi_id,
+};
+module_spi_driver(bmg160_spi_driver);
+
+MODULE_AUTHOR("Markus Pargmann <mpa@pengutronix.de>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMG160 SPI Gyro driver");
-- 
2.1.4

Re: [PATCH v2 5/6] iio: bmg160: Separate i2c and core driver

[Jonathan Cameron]

On 04/08/15 12:02, Markus Pargmann wrote:
> This patch separates the core driver using regmap and the i2c driver
> which creates the i2c regmap. Also in the Kconfig file BMG160 and
> BMG160_I2C are separate now.
> 
> Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Don't you need to EXPORT the various functions to be used
across the modules?
> ---
>  drivers/iio/gyro/Kconfig                     | 18 +++++--
>  drivers/iio/gyro/Makefile                    |  3 +-
>  drivers/iio/gyro/bmg160.h                    | 10 ++++
>  drivers/iio/gyro/{bmg160.c => bmg160_core.c} | 77 ++++------------------------
>  drivers/iio/gyro/bmg160_i2c.c                | 73 ++++++++++++++++++++++++++
>  5 files changed, 110 insertions(+), 71 deletions(-)
>  create mode 100644 drivers/iio/gyro/bmg160.h
>  rename drivers/iio/gyro/{bmg160.c => bmg160_core.c} (94%)
>  create mode 100644 drivers/iio/gyro/bmg160_i2c.c
> 
> diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
> index b44984b3bb24..1e6cfff5546f 100644
> --- a/drivers/iio/gyro/Kconfig
> +++ b/drivers/iio/gyro/Kconfig
> @@ -51,18 +51,28 @@ config ADXRS450
>  	  will be called adxrs450.
>  
>  config BMG160
> -	tristate "BOSCH BMG160 Gyro Sensor"
> -	depends on I2C
> +	bool "BOSCH BMG160 Gyro Sensor"
>  	select IIO_BUFFER
>  	select IIO_TRIGGERED_BUFFER
>  	select REGMAP
> -	select REGMAP_I2C
>  	help
>  	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
>  	  driver. This driver also supports BMI055 gyroscope.
>  
> +if BMG160
> +
> +config BMG160_I2C
> +	tristate "Driver for connection via I2C"
> +	depends on I2C
> +	select REGMAP_I2C
> +	help
> +	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
> +	  driver connected via I2C. This driver also supports BMI055 gyroscope.
> +
>  	  This driver can also be built as a module.  If so, the module
> -	  will be called bmg160.
> +	  will be called bmg160_i2c.
> +
> +endif
>  
>  config HID_SENSOR_GYRO_3D
>  	depends on HID_SENSOR_HUB
> diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile
> index f46341b39139..608401041550 100644
> --- a/drivers/iio/gyro/Makefile
> +++ b/drivers/iio/gyro/Makefile
> @@ -8,7 +8,8 @@ obj-$(CONFIG_ADIS16130) += adis16130.o
>  obj-$(CONFIG_ADIS16136) += adis16136.o
>  obj-$(CONFIG_ADIS16260) += adis16260.o
>  obj-$(CONFIG_ADXRS450) += adxrs450.o
> -obj-$(CONFIG_BMG160) += bmg160.o
> +obj-$(CONFIG_BMG160) += bmg160_core.o
> +obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
>  
>  obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
>  
> diff --git a/drivers/iio/gyro/bmg160.h b/drivers/iio/gyro/bmg160.h
> new file mode 100644
> index 000000000000..72db723c8fb6
> --- /dev/null
> +++ b/drivers/iio/gyro/bmg160.h
> @@ -0,0 +1,10 @@
> +#ifndef BMG160_H_
> +#define BMG160_H_
> +
> +extern const struct dev_pm_ops bmg160_pm_ops;
> +
> +int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
> +		      const char *name);
> +void bmg160_core_remove(struct device *dev);
> +
> +#endif  /* BMG160_H_ */
> diff --git a/drivers/iio/gyro/bmg160.c b/drivers/iio/gyro/bmg160_core.c
> similarity index 94%
> rename from drivers/iio/gyro/bmg160.c
> rename to drivers/iio/gyro/bmg160_core.c
> index 865ef4c1c43f..ba37db5d491a 100644
> --- a/drivers/iio/gyro/bmg160.c
> +++ b/drivers/iio/gyro/bmg160_core.c
> @@ -13,7 +13,6 @@
>   */
>  
>  #include <linux/module.h>
> -#include <linux/i2c.h>
>  #include <linux/interrupt.h>
>  #include <linux/delay.h>
>  #include <linux/slab.h>
> @@ -30,7 +29,6 @@
>  #include <linux/iio/triggered_buffer.h>
>  #include <linux/regmap.h>
>  
> -#define BMG160_DRV_NAME		"bmg160"
>  #define BMG160_IRQ_NAME		"bmg160_event"
>  #define BMG160_GPIO_NAME		"gpio_int"
>  
> @@ -137,14 +135,6 @@ static const struct {
>  			   { 133, BMG160_RANGE_250DPS},
>  			   { 66, BMG160_RANGE_125DPS} };
>  
> -struct regmap_config bmg160_regmap_i2c_conf = {
> -	.reg_bits = 8,
> -	.val_bits = 8,
> -
> -	.use_single_rw = true,
> -	.cache_type = REGCACHE_NONE,
> -};
> -
>  static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
>  {
>  	int ret;
> @@ -998,31 +988,22 @@ static const char *bmg160_match_acpi_device(struct device *dev)
>  	return dev_name(dev);
>  }
>  
> -static int bmg160_probe(struct i2c_client *client,
> -			const struct i2c_device_id *id)
> +int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
> +		      const char *name)
>  {
>  	struct bmg160_data *data;
>  	struct iio_dev *indio_dev;
>  	int ret;
> -	const char *name = NULL;
> -	struct regmap *regmap;
> -	struct device *dev = &client->dev;
> -
> -	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));
> +	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
>  	if (!indio_dev)
>  		return -ENOMEM;
>  
>  	data = iio_priv(indio_dev);
>  	dev_set_drvdata(dev, indio_dev);
>  	data->dev = dev;
> -	data->irq = client->irq;
> +	data->irq = irq;
> +	data->regmap = regmap;
>  
>  	ret = bmg160_chip_init(data);
>  	if (ret < 0)
> @@ -1030,9 +1011,6 @@ static int bmg160_probe(struct i2c_client *client,
>  
>  	mutex_init(&data->mutex);
>  
> -	if (id)
> -		name = id->name;
> -
>  	if (ACPI_HANDLE(dev))
>  		name = bmg160_match_acpi_device(dev);
>  
> @@ -1128,14 +1106,14 @@ err_trigger_unregister:
>  	return ret;
>  }
>  
> -static int bmg160_remove(struct i2c_client *client)
> +void bmg160_core_remove(struct device *dev)
>  {
> -	struct iio_dev *indio_dev = i2c_get_clientdata(client);
> +	struct iio_dev *indio_dev = dev_get_drvdata(dev);
>  	struct bmg160_data *data = iio_priv(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_device_unregister(indio_dev);
>  	iio_triggered_buffer_cleanup(indio_dev);
> @@ -1148,8 +1126,6 @@ static int bmg160_remove(struct i2c_client *client)
>  	mutex_lock(&data->mutex);
>  	bmg160_set_mode(data, BMG160_MODE_DEEP_SUSPEND);
>  	mutex_unlock(&data->mutex);
> -
> -	return 0;
>  }
GIven use across a module boundary I'd have thought an EXPORT was needed.
>  
>  #ifdef CONFIG_PM_SLEEP
> @@ -1212,40 +1188,9 @@ static int bmg160_runtime_resume(struct device *dev)
>  }
>  #endif
>  
> -static const struct dev_pm_ops bmg160_pm_ops = {
> +const struct dev_pm_ops bmg160_pm_ops = {
>  	SET_SYSTEM_SLEEP_PM_OPS(bmg160_suspend, bmg160_resume)
>  	SET_RUNTIME_PM_OPS(bmg160_runtime_suspend,
>  			   bmg160_runtime_resume, NULL)
>  };
>  
> -static const struct acpi_device_id bmg160_acpi_match[] = {
> -	{"BMG0160", 0},
> -	{"BMI055B", 0},
> -	{},
> -};
> -
> -MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
> -
> -static const struct i2c_device_id bmg160_id[] = {
> -	{"bmg160", 0},
> -	{"bmi055_gyro", 0},
> -	{}
> -};
> -
> -MODULE_DEVICE_TABLE(i2c, bmg160_id);
> -
> -static struct i2c_driver bmg160_driver = {
> -	.driver = {
> -		.name	= BMG160_DRV_NAME,
> -		.acpi_match_table = ACPI_PTR(bmg160_acpi_match),
> -		.pm	= &bmg160_pm_ops,
> -	},
> -	.probe		= bmg160_probe,
> -	.remove		= bmg160_remove,
> -	.id_table	= bmg160_id,
> -};
> -module_i2c_driver(bmg160_driver);
> -
> -MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
> -MODULE_LICENSE("GPL v2");
> -MODULE_DESCRIPTION("BMG160 Gyro driver");
> diff --git a/drivers/iio/gyro/bmg160_i2c.c b/drivers/iio/gyro/bmg160_i2c.c
> new file mode 100644
> index 000000000000..4a39dff13cf2
> --- /dev/null
> +++ b/drivers/iio/gyro/bmg160_i2c.c
> @@ -0,0 +1,73 @@
> +#include <linux/i2c.h>
> +#include <linux/regmap.h>
> +#include <linux/iio/iio.h>
> +#include <linux/module.h>
> +#include <linux/acpi.h>
> +
> +#include "bmg160.h"
> +
> +static const struct regmap_config bmg160_regmap_i2c_conf = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +
> +	.use_single_rw = true,
> +	.cache_type = REGCACHE_NONE,
> +};
> +
> +static int bmg160_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, &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);
> +	}
> +
> +	if (id)
> +		name = id->name;
> +
> +	return bmg160_core_probe(&client->dev, regmap, client->irq, name);
> +}
> +
> +static int bmg160_i2c_remove(struct i2c_client *client)
> +{
> +	bmg160_core_remove(&client->dev);
> +
> +	return 0;
> +}
> +
> +static const struct acpi_device_id bmg160_acpi_match[] = {
> +	{"BMG0160", 0},
> +	{"BMI055B", 0},
> +	{},
> +};
> +
> +MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
> +
> +static const struct i2c_device_id bmg160_i2c_id[] = {
> +	{"bmg160", 0},
> +	{"bmi055_gyro", 0},
> +	{}
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, bmg160_i2c_id);
> +
> +static struct i2c_driver bmg160_i2c_driver = {
> +	.driver = {
> +		.name	= "bmg160_i2c",
> +		.acpi_match_table = ACPI_PTR(bmg160_acpi_match),
> +		.pm	= &bmg160_pm_ops,
> +	},
> +	.probe		= bmg160_i2c_probe,
> +	.remove		= bmg160_i2c_remove,
> +	.id_table	= bmg160_i2c_id,
> +};
> +module_i2c_driver(bmg160_i2c_driver);
> +
> +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("BMG160 I2C Gyro driver");
> 

Re: [PATCH v2 0/6] iio: bmg160: Add SPI connection

[Jonathan Cameron]

On 04/08/15 12:02, Markus Pargmann wrote:
> Hi,
> 
> bmg160 and bmi055 can be used via I2C and SPI. This series converts the driver
> to regmap and splits core driver and I2C/SPI.
> 
> Changes in v2:
>  - Added the id->name from the SPI driver to be used as iio device name
>  - Fixed Kconfig in patch 2 to add selects for REGMAP_I2C
>  - Fixed regmap configs to be static const
> 
> Best regards,
> 
> Markus
I am more or less happy with these, but want a reviewed-by/acked-by from
Srinivas.
> 
> 
> Markus Pargmann (6):
>   iio: bmg160: Use i2c regmap instead of direct i2c access
>   iio: bmg160: Remove i2c_client from data struct
>   iio: bmg160: Use generic dev_drvdata
>   iio: bmg160: Remove remaining uses of i2c_client
>   iio: bmg160: Separate i2c and core driver
>   iio: bmg160: Add SPI driver
> 
>  drivers/iio/gyro/Kconfig                     |  29 ++-
>  drivers/iio/gyro/Makefile                    |   4 +-
>  drivers/iio/gyro/bmg160.h                    |  10 +
>  drivers/iio/gyro/{bmg160.c => bmg160_core.c} | 356 +++++++++++----------------
>  drivers/iio/gyro/bmg160_i2c.c                |  73 ++++++
>  drivers/iio/gyro/bmg160_spi.c                |  60 +++++
>  6 files changed, 311 insertions(+), 221 deletions(-)
>  create mode 100644 drivers/iio/gyro/bmg160.h
>  rename drivers/iio/gyro/{bmg160.c => bmg160_core.c} (74%)
>  create mode 100644 drivers/iio/gyro/bmg160_i2c.c
>  create mode 100644 drivers/iio/gyro/bmg160_spi.c
> 

Re: [PATCH v2 5/6] iio: bmg160: Separate i2c and core driver

[Markus Pargmann]

[-- Attachment #1: Type: text/plain, Size: 10989 bytes --]

On Sat, Aug 08, 2015 at 05:11:02PM +0100, Jonathan Cameron wrote:
> On 04/08/15 12:02, Markus Pargmann wrote:
> > This patch separates the core driver using regmap and the i2c driver
> > which creates the i2c regmap. Also in the Kconfig file BMG160 and
> > BMG160_I2C are separate now.
> > 
> > Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
> Don't you need to EXPORT the various functions to be used
> across the modules?

Yes, thanks. Will fix it.

Best Regards,

Markus

> > ---
> >  drivers/iio/gyro/Kconfig                     | 18 +++++--
> >  drivers/iio/gyro/Makefile                    |  3 +-
> >  drivers/iio/gyro/bmg160.h                    | 10 ++++
> >  drivers/iio/gyro/{bmg160.c => bmg160_core.c} | 77 ++++------------------------
> >  drivers/iio/gyro/bmg160_i2c.c                | 73 ++++++++++++++++++++++++++
> >  5 files changed, 110 insertions(+), 71 deletions(-)
> >  create mode 100644 drivers/iio/gyro/bmg160.h
> >  rename drivers/iio/gyro/{bmg160.c => bmg160_core.c} (94%)
> >  create mode 100644 drivers/iio/gyro/bmg160_i2c.c
> > 
> > diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
> > index b44984b3bb24..1e6cfff5546f 100644
> > --- a/drivers/iio/gyro/Kconfig
> > +++ b/drivers/iio/gyro/Kconfig
> > @@ -51,18 +51,28 @@ config ADXRS450
> >  	  will be called adxrs450.
> >  
> >  config BMG160
> > -	tristate "BOSCH BMG160 Gyro Sensor"
> > -	depends on I2C
> > +	bool "BOSCH BMG160 Gyro Sensor"
> >  	select IIO_BUFFER
> >  	select IIO_TRIGGERED_BUFFER
> >  	select REGMAP
> > -	select REGMAP_I2C
> >  	help
> >  	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
> >  	  driver. This driver also supports BMI055 gyroscope.
> >  
> > +if BMG160
> > +
> > +config BMG160_I2C
> > +	tristate "Driver for connection via I2C"
> > +	depends on I2C
> > +	select REGMAP_I2C
> > +	help
> > +	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
> > +	  driver connected via I2C. This driver also supports BMI055 gyroscope.
> > +
> >  	  This driver can also be built as a module.  If so, the module
> > -	  will be called bmg160.
> > +	  will be called bmg160_i2c.
> > +
> > +endif
> >  
> >  config HID_SENSOR_GYRO_3D
> >  	depends on HID_SENSOR_HUB
> > diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile
> > index f46341b39139..608401041550 100644
> > --- a/drivers/iio/gyro/Makefile
> > +++ b/drivers/iio/gyro/Makefile
> > @@ -8,7 +8,8 @@ obj-$(CONFIG_ADIS16130) += adis16130.o
> >  obj-$(CONFIG_ADIS16136) += adis16136.o
> >  obj-$(CONFIG_ADIS16260) += adis16260.o
> >  obj-$(CONFIG_ADXRS450) += adxrs450.o
> > -obj-$(CONFIG_BMG160) += bmg160.o
> > +obj-$(CONFIG_BMG160) += bmg160_core.o
> > +obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
> >  
> >  obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
> >  
> > diff --git a/drivers/iio/gyro/bmg160.h b/drivers/iio/gyro/bmg160.h
> > new file mode 100644
> > index 000000000000..72db723c8fb6
> > --- /dev/null
> > +++ b/drivers/iio/gyro/bmg160.h
> > @@ -0,0 +1,10 @@
> > +#ifndef BMG160_H_
> > +#define BMG160_H_
> > +
> > +extern const struct dev_pm_ops bmg160_pm_ops;
> > +
> > +int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
> > +		      const char *name);
> > +void bmg160_core_remove(struct device *dev);
> > +
> > +#endif  /* BMG160_H_ */
> > diff --git a/drivers/iio/gyro/bmg160.c b/drivers/iio/gyro/bmg160_core.c
> > similarity index 94%
> > rename from drivers/iio/gyro/bmg160.c
> > rename to drivers/iio/gyro/bmg160_core.c
> > index 865ef4c1c43f..ba37db5d491a 100644
> > --- a/drivers/iio/gyro/bmg160.c
> > +++ b/drivers/iio/gyro/bmg160_core.c
> > @@ -13,7 +13,6 @@
> >   */
> >  
> >  #include <linux/module.h>
> > -#include <linux/i2c.h>
> >  #include <linux/interrupt.h>
> >  #include <linux/delay.h>
> >  #include <linux/slab.h>
> > @@ -30,7 +29,6 @@
> >  #include <linux/iio/triggered_buffer.h>
> >  #include <linux/regmap.h>
> >  
> > -#define BMG160_DRV_NAME		"bmg160"
> >  #define BMG160_IRQ_NAME		"bmg160_event"
> >  #define BMG160_GPIO_NAME		"gpio_int"
> >  
> > @@ -137,14 +135,6 @@ static const struct {
> >  			   { 133, BMG160_RANGE_250DPS},
> >  			   { 66, BMG160_RANGE_125DPS} };
> >  
> > -struct regmap_config bmg160_regmap_i2c_conf = {
> > -	.reg_bits = 8,
> > -	.val_bits = 8,
> > -
> > -	.use_single_rw = true,
> > -	.cache_type = REGCACHE_NONE,
> > -};
> > -
> >  static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
> >  {
> >  	int ret;
> > @@ -998,31 +988,22 @@ static const char *bmg160_match_acpi_device(struct device *dev)
> >  	return dev_name(dev);
> >  }
> >  
> > -static int bmg160_probe(struct i2c_client *client,
> > -			const struct i2c_device_id *id)
> > +int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
> > +		      const char *name)
> >  {
> >  	struct bmg160_data *data;
> >  	struct iio_dev *indio_dev;
> >  	int ret;
> > -	const char *name = NULL;
> > -	struct regmap *regmap;
> > -	struct device *dev = &client->dev;
> > -
> > -	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));
> > +	indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
> >  	if (!indio_dev)
> >  		return -ENOMEM;
> >  
> >  	data = iio_priv(indio_dev);
> >  	dev_set_drvdata(dev, indio_dev);
> >  	data->dev = dev;
> > -	data->irq = client->irq;
> > +	data->irq = irq;
> > +	data->regmap = regmap;
> >  
> >  	ret = bmg160_chip_init(data);
> >  	if (ret < 0)
> > @@ -1030,9 +1011,6 @@ static int bmg160_probe(struct i2c_client *client,
> >  
> >  	mutex_init(&data->mutex);
> >  
> > -	if (id)
> > -		name = id->name;
> > -
> >  	if (ACPI_HANDLE(dev))
> >  		name = bmg160_match_acpi_device(dev);
> >  
> > @@ -1128,14 +1106,14 @@ err_trigger_unregister:
> >  	return ret;
> >  }
> >  
> > -static int bmg160_remove(struct i2c_client *client)
> > +void bmg160_core_remove(struct device *dev)
> >  {
> > -	struct iio_dev *indio_dev = i2c_get_clientdata(client);
> > +	struct iio_dev *indio_dev = dev_get_drvdata(dev);
> >  	struct bmg160_data *data = iio_priv(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_device_unregister(indio_dev);
> >  	iio_triggered_buffer_cleanup(indio_dev);
> > @@ -1148,8 +1126,6 @@ static int bmg160_remove(struct i2c_client *client)
> >  	mutex_lock(&data->mutex);
> >  	bmg160_set_mode(data, BMG160_MODE_DEEP_SUSPEND);
> >  	mutex_unlock(&data->mutex);
> > -
> > -	return 0;
> >  }
> GIven use across a module boundary I'd have thought an EXPORT was needed.
> >  
> >  #ifdef CONFIG_PM_SLEEP
> > @@ -1212,40 +1188,9 @@ static int bmg160_runtime_resume(struct device *dev)
> >  }
> >  #endif
> >  
> > -static const struct dev_pm_ops bmg160_pm_ops = {
> > +const struct dev_pm_ops bmg160_pm_ops = {
> >  	SET_SYSTEM_SLEEP_PM_OPS(bmg160_suspend, bmg160_resume)
> >  	SET_RUNTIME_PM_OPS(bmg160_runtime_suspend,
> >  			   bmg160_runtime_resume, NULL)
> >  };
> >  
> > -static const struct acpi_device_id bmg160_acpi_match[] = {
> > -	{"BMG0160", 0},
> > -	{"BMI055B", 0},
> > -	{},
> > -};
> > -
> > -MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
> > -
> > -static const struct i2c_device_id bmg160_id[] = {
> > -	{"bmg160", 0},
> > -	{"bmi055_gyro", 0},
> > -	{}
> > -};
> > -
> > -MODULE_DEVICE_TABLE(i2c, bmg160_id);
> > -
> > -static struct i2c_driver bmg160_driver = {
> > -	.driver = {
> > -		.name	= BMG160_DRV_NAME,
> > -		.acpi_match_table = ACPI_PTR(bmg160_acpi_match),
> > -		.pm	= &bmg160_pm_ops,
> > -	},
> > -	.probe		= bmg160_probe,
> > -	.remove		= bmg160_remove,
> > -	.id_table	= bmg160_id,
> > -};
> > -module_i2c_driver(bmg160_driver);
> > -
> > -MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
> > -MODULE_LICENSE("GPL v2");
> > -MODULE_DESCRIPTION("BMG160 Gyro driver");
> > diff --git a/drivers/iio/gyro/bmg160_i2c.c b/drivers/iio/gyro/bmg160_i2c.c
> > new file mode 100644
> > index 000000000000..4a39dff13cf2
> > --- /dev/null
> > +++ b/drivers/iio/gyro/bmg160_i2c.c
> > @@ -0,0 +1,73 @@
> > +#include <linux/i2c.h>
> > +#include <linux/regmap.h>
> > +#include <linux/iio/iio.h>
> > +#include <linux/module.h>
> > +#include <linux/acpi.h>
> > +
> > +#include "bmg160.h"
> > +
> > +static const struct regmap_config bmg160_regmap_i2c_conf = {
> > +	.reg_bits = 8,
> > +	.val_bits = 8,
> > +
> > +	.use_single_rw = true,
> > +	.cache_type = REGCACHE_NONE,
> > +};
> > +
> > +static int bmg160_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, &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);
> > +	}
> > +
> > +	if (id)
> > +		name = id->name;
> > +
> > +	return bmg160_core_probe(&client->dev, regmap, client->irq, name);
> > +}
> > +
> > +static int bmg160_i2c_remove(struct i2c_client *client)
> > +{
> > +	bmg160_core_remove(&client->dev);
> > +
> > +	return 0;
> > +}
> > +
> > +static const struct acpi_device_id bmg160_acpi_match[] = {
> > +	{"BMG0160", 0},
> > +	{"BMI055B", 0},
> > +	{},
> > +};
> > +
> > +MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
> > +
> > +static const struct i2c_device_id bmg160_i2c_id[] = {
> > +	{"bmg160", 0},
> > +	{"bmi055_gyro", 0},
> > +	{}
> > +};
> > +
> > +MODULE_DEVICE_TABLE(i2c, bmg160_i2c_id);
> > +
> > +static struct i2c_driver bmg160_i2c_driver = {
> > +	.driver = {
> > +		.name	= "bmg160_i2c",
> > +		.acpi_match_table = ACPI_PTR(bmg160_acpi_match),
> > +		.pm	= &bmg160_pm_ops,
> > +	},
> > +	.probe		= bmg160_i2c_probe,
> > +	.remove		= bmg160_i2c_remove,
> > +	.id_table	= bmg160_i2c_id,
> > +};
> > +module_i2c_driver(bmg160_i2c_driver);
> > +
> > +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
> > +MODULE_LICENSE("GPL v2");
> > +MODULE_DESCRIPTION("BMG160 I2C Gyro driver");
> > 
> 
> 

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Re: [PATCH v2 1/6] iio: bmg160: Use i2c regmap instead of direct i2c access

[Markus Pargmann]

[-- Attachment #1: Type: text/plain, Size: 17144 bytes --]

On Tue, Aug 04, 2015 at 01:02:54PM +0200, Markus Pargmann wrote:
> 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>
> ---
>  drivers/iio/gyro/Kconfig  |   2 +
>  drivers/iio/gyro/bmg160.c | 200 +++++++++++++++++++++-------------------------
>  2 files changed, 91 insertions(+), 111 deletions(-)
> 
> diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
> index 8d2439345673..b44984b3bb24 100644
> --- a/drivers/iio/gyro/Kconfig
> +++ b/drivers/iio/gyro/Kconfig
> @@ -55,6 +55,8 @@ config BMG160
>  	depends on I2C
>  	select IIO_BUFFER
>  	select IIO_TRIGGERED_BUFFER
> +	select REGMAP
> +	select REGMAP_I2C
>  	help
>  	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
>  	  driver. This driver also supports BMI055 gyroscope.
> diff --git a/drivers/iio/gyro/bmg160.c b/drivers/iio/gyro/bmg160.c
> index 460bf715d541..626f5c98dde8 100644
> --- a/drivers/iio/gyro/bmg160.c
> +++ b/drivers/iio/gyro/bmg160.c
> @@ -28,6 +28,7 @@
>  #include <linux/iio/events.h>
>  #include <linux/iio/trigger_consumer.h>
>  #include <linux/iio/triggered_buffer.h>
> +#include <linux/regmap.h>
>  
>  #define BMG160_DRV_NAME		"bmg160"
>  #define BMG160_IRQ_NAME		"bmg160_event"
> @@ -98,6 +99,7 @@
>  
>  struct bmg160_data {
>  	struct i2c_client *client;
> +	struct regmap *regmap;
>  	struct iio_trigger *dready_trig;
>  	struct iio_trigger *motion_trig;
>  	struct mutex mutex;
> @@ -134,12 +136,19 @@ static const struct {
>  			   { 133, BMG160_RANGE_250DPS},
>  			   { 66, BMG160_RANGE_125DPS} };
>  
> +struct regmap_config bmg160_regmap_i2c_conf = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +
> +	.use_single_rw = true,

This should not be necessary, we should be able to read multiple
registers at once. This is the same for the spi regmap config.

Also a max_register is missing. Will fix it.

Regards,

Markus

> +	.cache_type = REGCACHE_NONE,
> +};
> +
>  static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
>  {
>  	int ret;
>  
> -	ret = i2c_smbus_write_byte_data(data->client,
> -					BMG160_REG_PMU_LPW, mode);
> +	ret = regmap_write(data->regmap, BMG160_REG_PMU_LPW, mode);
>  	if (ret < 0) {
>  		dev_err(&data->client->dev, "Error writing reg_pmu_lpw\n");
>  		return ret;
> @@ -169,8 +178,7 @@ static int bmg160_set_bw(struct bmg160_data *data, int val)
>  	if (bw_bits < 0)
>  		return bw_bits;
>  
> -	ret = i2c_smbus_write_byte_data(data->client, BMG160_REG_PMU_BW,
> -					bw_bits);
> +	ret = regmap_write(data->regmap, BMG160_REG_PMU_BW, bw_bits);
>  	if (ret < 0) {
>  		dev_err(&data->client->dev, "Error writing reg_pmu_bw\n");
>  		return ret;
> @@ -184,16 +192,17 @@ static int bmg160_set_bw(struct bmg160_data *data, int val)
>  static int bmg160_chip_init(struct bmg160_data *data)
>  {
>  	int ret;
> +	unsigned int val;
>  
> -	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_CHIP_ID);
> +	ret = regmap_read(data->regmap, BMG160_REG_CHIP_ID, &val);
>  	if (ret < 0) {
>  		dev_err(&data->client->dev, "Error reading reg_chip_id\n");
>  		return ret;
>  	}
>  
> -	dev_dbg(&data->client->dev, "Chip Id %x\n", ret);
> -	if (ret != BMG160_CHIP_ID_VAL) {
> -		dev_err(&data->client->dev, "invalid chip %x\n", ret);
> +	dev_dbg(&data->client->dev, "Chip Id %x\n", val);
> +	if (val != BMG160_CHIP_ID_VAL) {
> +		dev_err(&data->client->dev, "invalid chip %x\n", val);
>  		return -ENODEV;
>  	}
>  
> @@ -210,40 +219,31 @@ static int bmg160_chip_init(struct bmg160_data *data)
>  		return ret;
>  
>  	/* Set Default Range */
> -	ret = i2c_smbus_write_byte_data(data->client,
> -					BMG160_REG_RANGE,
> -					BMG160_RANGE_500DPS);
> +	ret = regmap_write(data->regmap, BMG160_REG_RANGE, BMG160_RANGE_500DPS);
>  	if (ret < 0) {
>  		dev_err(&data->client->dev, "Error writing reg_range\n");
>  		return ret;
>  	}
>  	data->dps_range = BMG160_RANGE_500DPS;
>  
> -	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_SLOPE_THRES);
> +	ret = regmap_read(data->regmap, BMG160_REG_SLOPE_THRES, &val);
>  	if (ret < 0) {
>  		dev_err(&data->client->dev, "Error reading reg_slope_thres\n");
>  		return ret;
>  	}
> -	data->slope_thres = ret;
> +	data->slope_thres = val;
>  
>  	/* Set default interrupt mode */
> -	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_EN_1);
> -	if (ret < 0) {
> -		dev_err(&data->client->dev, "Error reading reg_int_en_1\n");
> -		return ret;
> -	}
> -	ret &= ~BMG160_INT1_BIT_OD;
> -	ret = i2c_smbus_write_byte_data(data->client,
> -					BMG160_REG_INT_EN_1, ret);
> +	ret = regmap_update_bits(data->regmap, BMG160_REG_INT_EN_1,
> +				 BMG160_INT1_BIT_OD, 0);
>  	if (ret < 0) {
> -		dev_err(&data->client->dev, "Error writing reg_int_en_1\n");
> +		dev_err(&data->client->dev, "Error updating bits in reg_int_en_1\n");
>  		return ret;
>  	}
>  
> -	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_motion_intr\n");
> @@ -284,41 +284,28 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
>  	int ret;
>  
>  	/* Enable/Disable INT_MAP0 mapping */
> -	ret = i2c_smbus_read_byte_data(data->client,  BMG160_REG_INT_MAP_0);
> -	if (ret < 0) {
> -		dev_err(&data->client->dev, "Error reading reg_int_map0\n");
> -		return ret;
> -	}
> -	if (status)
> -		ret |= BMG160_INT_MAP_0_BIT_ANY;
> -	else
> -		ret &= ~BMG160_INT_MAP_0_BIT_ANY;
> -
> -	ret = i2c_smbus_write_byte_data(data->client,
> -					BMG160_REG_INT_MAP_0,
> -					ret);
> +	ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_0,
> +				 BMG160_INT_MAP_0_BIT_ANY,
> +				 (status ? BMG160_INT_MAP_0_BIT_ANY : 0));
>  	if (ret < 0) {
> -		dev_err(&data->client->dev, "Error writing reg_int_map0\n");
> +		dev_err(&data->client->dev, "Error updating bits reg_int_map0\n");
>  		return ret;
>  	}
>  
>  	/* Enable/Disable slope interrupts */
>  	if (status) {
>  		/* Update slope thres */
> -		ret = i2c_smbus_write_byte_data(data->client,
> -						BMG160_REG_SLOPE_THRES,
> -						data->slope_thres);
> +		ret = regmap_write(data->regmap, BMG160_REG_SLOPE_THRES,
> +				   data->slope_thres);
>  		if (ret < 0) {
>  			dev_err(&data->client->dev,
>  				"Error writing reg_slope_thres\n");
>  			return ret;
>  		}
>  
> -		ret = i2c_smbus_write_byte_data(data->client,
> -						BMG160_REG_MOTION_INTR,
> -						BMG160_INT_MOTION_X |
> -						BMG160_INT_MOTION_Y |
> -						BMG160_INT_MOTION_Z);
> +		ret = regmap_write(data->regmap, BMG160_REG_MOTION_INTR,
> +				   BMG160_INT_MOTION_X | BMG160_INT_MOTION_Y |
> +				   BMG160_INT_MOTION_Z);
>  		if (ret < 0) {
>  			dev_err(&data->client->dev,
>  				"Error writing reg_motion_intr\n");
> @@ -331,10 +318,10 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
>  		 * to set latched mode, we will be flooded anyway with INTR
>  		 */
>  		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");
> @@ -342,14 +329,12 @@ static int bmg160_setup_any_motion_interrupt(struct bmg160_data *data,
>  			}
>  		}
>  
> -		ret = i2c_smbus_write_byte_data(data->client,
> -						BMG160_REG_INT_EN_0,
> -						BMG160_DATA_ENABLE_INT);
> +		ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
> +				   BMG160_DATA_ENABLE_INT);
>  
> -	} else
> -		ret = i2c_smbus_write_byte_data(data->client,
> -						BMG160_REG_INT_EN_0,
> -						0);
> +	} else {
> +		ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
> +	}
>  
>  	if (ret < 0) {
>  		dev_err(&data->client->dev, "Error writing reg_int_en0\n");
> @@ -365,55 +350,39 @@ static int bmg160_setup_new_data_interrupt(struct bmg160_data *data,
>  	int ret;
>  
>  	/* Enable/Disable INT_MAP1 mapping */
> -	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_INT_MAP_1);
> -	if (ret < 0) {
> -		dev_err(&data->client->dev, "Error reading reg_int_map1\n");
> -		return ret;
> -	}
> -
> -	if (status)
> -		ret |= BMG160_INT_MAP_1_BIT_NEW_DATA;
> -	else
> -		ret &= ~BMG160_INT_MAP_1_BIT_NEW_DATA;
> -
> -	ret = i2c_smbus_write_byte_data(data->client,
> -					BMG160_REG_INT_MAP_1,
> -					ret);
> +	ret = regmap_update_bits(data->regmap, BMG160_REG_INT_MAP_1,
> +				 BMG160_INT_MAP_1_BIT_NEW_DATA,
> +				 (status ? BMG160_INT_MAP_1_BIT_NEW_DATA : 0));
>  	if (ret < 0) {
> -		dev_err(&data->client->dev, "Error writing reg_int_map1\n");
> +		dev_err(&data->client->dev, "Error updating bits in reg_int_map1\n");
>  		return ret;
>  	}
>  
>  	if (status) {
> -		ret = i2c_smbus_write_byte_data(data->client,
> -						BMG160_REG_INT_RST_LATCH,
> -						BMG160_INT_MODE_NON_LATCH_INT |
> -						BMG160_INT_MODE_LATCH_RESET);
> +		ret = regmap_write(data->regmap, BMG160_REG_INT_RST_LATCH,
> +				   BMG160_INT_MODE_NON_LATCH_INT |
> +				   BMG160_INT_MODE_LATCH_RESET);
>  		if (ret < 0) {
>  			dev_err(&data->client->dev,
>  				"Error writing reg_rst_latch\n");
>  				return ret;
>  		}
>  
> -		ret = i2c_smbus_write_byte_data(data->client,
> -						BMG160_REG_INT_EN_0,
> -						BMG160_DATA_ENABLE_INT);
> +		ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0,
> +				   BMG160_DATA_ENABLE_INT);
>  
>  	} else {
>  		/* Restore interrupt mode */
> -		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");
>  				return ret;
>  		}
>  
> -		ret = i2c_smbus_write_byte_data(data->client,
> -						BMG160_REG_INT_EN_0,
> -						0);
> +		ret = regmap_write(data->regmap, BMG160_REG_INT_EN_0, 0);
>  	}
>  
>  	if (ret < 0) {
> @@ -444,10 +413,8 @@ static int bmg160_set_scale(struct bmg160_data *data, int val)
>  
>  	for (i = 0; i < ARRAY_SIZE(bmg160_scale_table); ++i) {
>  		if (bmg160_scale_table[i].scale == val) {
> -			ret = i2c_smbus_write_byte_data(
> -					data->client,
> -					BMG160_REG_RANGE,
> -					bmg160_scale_table[i].dps_range);
> +			ret = regmap_write(data->regmap, BMG160_REG_RANGE,
> +					   bmg160_scale_table[i].dps_range);
>  			if (ret < 0) {
>  				dev_err(&data->client->dev,
>  					"Error writing reg_range\n");
> @@ -464,6 +431,7 @@ static int bmg160_set_scale(struct bmg160_data *data, int val)
>  static int bmg160_get_temp(struct bmg160_data *data, int *val)
>  {
>  	int ret;
> +	unsigned int raw_val;
>  
>  	mutex_lock(&data->mutex);
>  	ret = bmg160_set_power_state(data, true);
> @@ -472,7 +440,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
>  		return ret;
>  	}
>  
> -	ret = i2c_smbus_read_byte_data(data->client, BMG160_REG_TEMP);
> +	ret = regmap_read(data->regmap, BMG160_REG_TEMP, &raw_val);
>  	if (ret < 0) {
>  		dev_err(&data->client->dev, "Error reading reg_temp\n");
>  		bmg160_set_power_state(data, false);
> @@ -480,7 +448,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
>  		return ret;
>  	}
>  
> -	*val = sign_extend32(ret, 7);
> +	*val = sign_extend32(raw_val, 7);
>  	ret = bmg160_set_power_state(data, false);
>  	mutex_unlock(&data->mutex);
>  	if (ret < 0)
> @@ -492,6 +460,7 @@ static int bmg160_get_temp(struct bmg160_data *data, int *val)
>  static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
>  {
>  	int ret;
> +	unsigned int raw_val;
>  
>  	mutex_lock(&data->mutex);
>  	ret = bmg160_set_power_state(data, true);
> @@ -500,7 +469,8 @@ static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
>  		return ret;
>  	}
>  
> -	ret = i2c_smbus_read_word_data(data->client, BMG160_AXIS_TO_REG(axis));
> +	ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(axis), &raw_val,
> +			       2);
>  	if (ret < 0) {
>  		dev_err(&data->client->dev, "Error reading axis %d\n", axis);
>  		bmg160_set_power_state(data, false);
> @@ -508,7 +478,7 @@ static int bmg160_get_axis(struct bmg160_data *data, int axis, int *val)
>  		return ret;
>  	}
>  
> -	*val = sign_extend32(ret, 15);
> +	*val = sign_extend32(raw_val, 15);
>  	ret = bmg160_set_power_state(data, false);
>  	mutex_unlock(&data->mutex);
>  	if (ret < 0)
> @@ -807,12 +777,13 @@ static irqreturn_t bmg160_trigger_handler(int irq, void *p)
>  	struct iio_dev *indio_dev = pf->indio_dev;
>  	struct bmg160_data *data = iio_priv(indio_dev);
>  	int bit, ret, i = 0;
> +	unsigned int 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,
> -					       BMG160_AXIS_TO_REG(bit));
> +		ret = regmap_bulk_read(data->regmap, BMG160_AXIS_TO_REG(bit),
> +				       &val, 2);
>  		if (ret < 0) {
>  			mutex_unlock(&data->mutex);
>  			goto err;
> @@ -840,10 +811,9 @@ static int bmg160_trig_try_reen(struct iio_trigger *trig)
>  		return 0;
>  
>  	/* Set latched mode interrupt and clear any latched interrupt */
> -	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");
>  		return ret;
> @@ -907,33 +877,34 @@ static irqreturn_t bmg160_event_handler(int irq, void *private)
>  	struct bmg160_data *data = iio_priv(indio_dev);
>  	int ret;
>  	int dir;
> +	unsigned int val;
>  
> -	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 +914,9 @@ 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 +1008,14 @@ 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)
> -- 
> 2.1.4
> 
> 
> 

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

[-- Attachment #2: Digital signature --]
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Re: [PATCH v2 6/6] iio: bmg160: Add SPI driver

[Markus Pargmann]

[-- Attachment #1: Type: text/plain, Size: 3934 bytes --]

On Tue, Aug 04, 2015 at 01:02:59PM +0200, Markus Pargmann wrote:
> Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
> ---
>  drivers/iio/gyro/Kconfig      | 11 ++++++++
>  drivers/iio/gyro/Makefile     |  1 +
>  drivers/iio/gyro/bmg160_spi.c | 60 +++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 72 insertions(+)
>  create mode 100644 drivers/iio/gyro/bmg160_spi.c
> 
> diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
> index 1e6cfff5546f..420aea844216 100644
> --- a/drivers/iio/gyro/Kconfig
> +++ b/drivers/iio/gyro/Kconfig
> @@ -72,6 +72,17 @@ config BMG160_I2C
>  	  This driver can also be built as a module.  If so, the module
>  	  will be called bmg160_i2c.
>  
> +config BMG160_SPI
> +	tristate "Driver for connection via SPI"
> +	depends on SPI
> +	select REGMAP_SPI
> +	help
> +	  Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
> +	  driver connected via SPI. This driver also supports BMI055 gyroscope.
> +
> +	  This driver can also be built as a module.  If so, the module
> +	  will be called bmg160_spi.
> +
>  endif
>  
>  config HID_SENSOR_GYRO_3D
> diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile
> index 608401041550..f866a4be0667 100644
> --- a/drivers/iio/gyro/Makefile
> +++ b/drivers/iio/gyro/Makefile
> @@ -10,6 +10,7 @@ obj-$(CONFIG_ADIS16260) += adis16260.o
>  obj-$(CONFIG_ADXRS450) += adxrs450.o
>  obj-$(CONFIG_BMG160) += bmg160_core.o
>  obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
> +obj-$(CONFIG_BMG160_SPI) += bmg160_spi.o
>  
>  obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
>  
> diff --git a/drivers/iio/gyro/bmg160_spi.c b/drivers/iio/gyro/bmg160_spi.c
> new file mode 100644
> index 000000000000..4dcef65f3476
> --- /dev/null
> +++ b/drivers/iio/gyro/bmg160_spi.c
> @@ -0,0 +1,60 @@
> +#include <linux/spi/spi.h>
> +#include <linux/regmap.h>
> +#include <linux/iio/iio.h>
> +#include <linux/module.h>
> +
> +#include <bmg160.h>
> +
> +static const struct regmap_config bmg160_regmap_spi_conf = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +	.read_flag_mask = 0x80,

This read_flag_mask seems to be the default for spi. The regmap spi bus
driver already defines this so it is not necessary here, will remove it.

Best regards,

Markus

> +
> +	.use_single_rw = true,
> +	.cache_type = REGCACHE_NONE,
> +};
> +
> +static int bmg160_spi_probe(struct spi_device *spi)
> +{
> +	struct regmap *regmap;
> +	const struct spi_device_id *id = spi_get_device_id(spi);
> +
> +	regmap = devm_regmap_init_spi(spi, &bmg160_regmap_spi_conf);
> +	if (IS_ERR(regmap)) {
> +		dev_err(&spi->dev, "Failed to register spi regmap %d\n",
> +			(int)PTR_ERR(regmap));
> +		return PTR_ERR(regmap);
> +	}
> +
> +	return bmg160_core_probe(&spi->dev, regmap, spi->irq, id->name);
> +}
> +
> +static int bmg160_spi_remove(struct spi_device *spi)
> +{
> +	bmg160_core_remove(&spi->dev);
> +
> +	return 0;
> +}
> +
> +static const struct spi_device_id bmg160_spi_id[] = {
> +	{"bmg160", 0},
> +	{"bmi055_gyro", 0},
> +	{}
> +};
> +
> +MODULE_DEVICE_TABLE(spi, bmg160_spi_id);
> +
> +static struct spi_driver bmg160_spi_driver = {
> +	.driver = {
> +		.name	= "bmg160_spi",
> +		.pm	= &bmg160_pm_ops,
> +	},
> +	.probe		= bmg160_spi_probe,
> +	.remove		= bmg160_spi_remove,
> +	.id_table	= bmg160_spi_id,
> +};
> +module_spi_driver(bmg160_spi_driver);
> +
> +MODULE_AUTHOR("Markus Pargmann <mpa@pengutronix.de>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("BMG160 SPI Gyro driver");
> -- 
> 2.1.4
> 
> 
> 

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