Merge tag 'staging-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging and IIO driver updates from Greg KH:
 "Here is the big staging/iio driver update for 5.4-rc1.

  Lots of churn here, with a few driver/filesystems moving out of
  staging finally:

     - erofs moved out of staging

     - greybus core code moved out of staging

  Along with that, a new filesytem has been added:

     - extfat

  to provide support for those devices requiring that filesystem (i.e.
  transfer devices to/from windows systems or printers)

  Other than that, there a number of new IIO drivers, and lots and lots
  and lots of staging driver cleanups and minor fixes as people continue
  to dig into those for easy changes.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'staging-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (453 commits)
  Staging: gasket: Use temporaries to reduce line length.
  Staging: octeon: Avoid several usecases of strcpy
  staging: vhciq_core: replace snprintf with scnprintf
  staging: wilc1000: avoid twice IRQ handler execution for each single interrupt
  staging: wilc1000: remove unused interrupt status handling code
  staging: fbtft: make several arrays static const, makes object smaller
  staging: rtl8188eu: make two arrays static const, makes object smaller
  staging: rtl8723bs: core: Remove Macro "IS_MAC_ADDRESS_BROADCAST"
  dt-bindings: anybus-controller: move to staging/ tree
  staging: emxx_udc: remove local TRUE/FALSE definition
  staging: wilc1000: look for rtc_clk clock
  staging: dt-bindings: wilc1000: add optional rtc_clk property
  staging: nvec: make use of devm_platform_ioremap_resource
  staging: exfat: drop unused function parameter
  Staging: exfat: Avoid use of strcpy
  staging: exfat: use integer constants
  staging: exfat: cleanup spacing for casts
  staging: exfat: cleanup spacing for operators
  staging: rtl8723bs: hal: remove redundant variable n
  staging: pi433: Fix typo in documentation
  ...

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);