1 files changed, 19 insertions, 47 deletions

diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h
index 2948ac99e2da..686be532f4cb 100644
--- a/include/linux/iio/common/st_sensors.h
+++ b/include/linux/iio/common/st_sensors.h
@@ -16,11 +16,16 @@
 #include <linux/iio/trigger.h>
 #include <linux/bitops.h>
 #include <linux/regulator/consumer.h>
+#include <linux/regmap.h>
 
 #include <linux/platform_data/st_sensors_pdata.h>
 
-#define ST_SENSORS_TX_MAX_LENGTH		2
-#define ST_SENSORS_RX_MAX_LENGTH		6
+/*
+ * Buffer size max case: 2bytes per channel, 3 channels in total +
+ *			 8bytes timestamp channel (s64)
+ */
+#define ST_SENSORS_MAX_BUFFER_SIZE		(ALIGN(2 * 3, sizeof(s64)) + \
+						 sizeof(s64))
 
 #define ST_SENSORS_ODR_LIST_MAX			10
 #define ST_SENSORS_FULLSCALE_AVL_MAX		10
@@ -170,36 +175,6 @@ struct st_sensor_data_ready_irq {
 };
 
 /**
- * struct st_sensor_transfer_buffer - ST sensor device I/O buffer
- * @buf_lock: Mutex to protect rx and tx buffers.
- * @tx_buf: Buffer used by SPI transfer function to send data to the sensors.
- *	This buffer is used to avoid DMA not-aligned issue.
- * @rx_buf: Buffer used by SPI transfer to receive data from sensors.
- *	This buffer is used to avoid DMA not-aligned issue.
- */
-struct st_sensor_transfer_buffer {
-	struct mutex buf_lock;
-	u8 rx_buf[ST_SENSORS_RX_MAX_LENGTH];
-	u8 tx_buf[ST_SENSORS_TX_MAX_LENGTH] ____cacheline_aligned;
-};
-
-/**
- * struct st_sensor_transfer_function - ST sensor device I/O function
- * @read_byte: Function used to read one byte.
- * @write_byte: Function used to write one byte.
- * @read_multiple_byte: Function used to read multiple byte.
- */
-struct st_sensor_transfer_function {
-	int (*read_byte) (struct st_sensor_transfer_buffer *tb,
-				struct device *dev, u8 reg_addr, u8 *res_byte);
-	int (*write_byte) (struct st_sensor_transfer_buffer *tb,
-				struct device *dev, u8 reg_addr, u8 data);
-	int (*read_multiple_byte) (struct st_sensor_transfer_buffer *tb,
-		struct device *dev, u8 reg_addr, int len, u8 *data,
-							bool multiread_bit);
-};
-
-/**
  * struct st_sensor_settings - ST specific sensor settings
  * @wai: Contents of WhoAmI register.
  * @wai_addr: The address of WhoAmI register.
@@ -242,19 +217,17 @@ struct st_sensor_settings {
  * @current_fullscale: Maximum range of measure by the sensor.
  * @vdd: Pointer to sensor's Vdd power supply
  * @vdd_io: Pointer to sensor's Vdd-IO power supply
+ * @regmap: Pointer to specific sensor regmap configuration.
  * @enabled: Status of the sensor (false->off, true->on).
- * @multiread_bit: Use or not particular bit for [I2C/SPI] multiread.
- * @buffer_data: Data used by buffer part.
  * @odr: Output data rate of the sensor [Hz].
  * num_data_channels: Number of data channels used in buffer.
  * @drdy_int_pin: Redirect DRDY on pin 1 (1) or pin 2 (2).
  * @int_pin_open_drain: Set the interrupt/DRDY to open drain.
- * @get_irq_data_ready: Function to get the IRQ used for data ready signal.
- * @tf: Transfer function structure used by I/O operations.
- * @tb: Transfer buffers and mutex used by I/O operations.
+ * @irq: the IRQ number.
  * @edge_irq: the IRQ triggers on edges and need special handling.
  * @hw_irq_trigger: if we're using the hardware interrupt on the sensor.
  * @hw_timestamp: Latest timestamp from the interrupt handler, when in use.
+ * @buffer_data: Data used by buffer part.
  */
 struct st_sensor_data {
 	struct device *dev;
@@ -264,26 +237,22 @@ struct st_sensor_data {
 	struct st_sensor_fullscale_avl *current_fullscale;
 	struct regulator *vdd;
 	struct regulator *vdd_io;
+	struct regmap *regmap;
 
 	bool enabled;
-	bool multiread_bit;
-
-	char *buffer_data;
 
 	unsigned int odr;
 	unsigned int num_data_channels;
 
 	u8 drdy_int_pin;
 	bool int_pin_open_drain;
-
-	unsigned int (*get_irq_data_ready) (struct iio_dev *indio_dev);
-
-	const struct st_sensor_transfer_function *tf;
-	struct st_sensor_transfer_buffer tb;
+	int irq;
 
 	bool edge_irq;
 	bool hw_irq_trigger;
 	s64 hw_timestamp;
+
+	char buffer_data[ST_SENSORS_MAX_BUFFER_SIZE] ____cacheline_aligned;
 };
 
 #ifdef CONFIG_IIO_BUFFER
@@ -334,8 +303,11 @@ int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale);
 int st_sensors_read_info_raw(struct iio_dev *indio_dev,
 				struct iio_chan_spec const *ch, int *val);
 
-int st_sensors_check_device_support(struct iio_dev *indio_dev,
-	int num_sensors_list, const struct st_sensor_settings *sensor_settings);
+int st_sensors_get_settings_index(const char *name,
+				  const struct st_sensor_settings *list,
+				  const int list_length);
+
+int st_sensors_verify_id(struct iio_dev *indio_dev);
 
 ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev,
 				struct device_attribute *attr, char *buf);