Merge tag 'staging-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO driver updates from Greg KH:
 "Here is the large set of staging and IIO driver changes for 5.8-rc1

  Nothing major, but a lot of new IIO drivers are included in here,
  along with other core iio cleanups and changes.

  On the staging driver front, again, nothing noticable. No new
  deletions or additions, just a ton of tiny cleanups all over the tree
  done by a lot of different people. Most coding style, but many actual
  real fixes and cleanups that are nice to see.

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

* tag 'staging-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (618 commits)
  staging: rtl8723bs: Use common packet header constants
  staging: sm750fb: Add names to proc_setBLANK args
  staging: most: usb: init return value in default path of switch/case expression
  staging: vchiq: Get rid of VCHIQ_SERVICE_OPENEND callback reason
  staging: vchiq: move vchiq_release_message() into vchiq
  staging: vchi: Get rid of C++ guards
  staging: vchi: Get rid of not implemented function declarations
  staging: vchi: Get rid of vchiq_status_to_vchi()
  staging: vchi: Get rid of vchi_service_set_option()
  staging: vchi: Merge vchi_msg_queue() into vchi_queue_kernel_message()
  staging: vchiq: Move copy callback handling into vchiq
  staging: vchi: Get rid of vchi_queue_user_message()
  staging: vchi: Get rid of vchi_service_destroy()
  staging: most: usb: use function sysfs_streq
  staging: most: usb: add missing put_device calls
  staging: most: usb: use correct error codes
  staging: most: usb: replace code to calculate array index
  staging: most: usb: don't use error path to exit function on success
  staging: most: usb: move allocation of URB out of critical section
  staging: most: usb: return 0 instead of variable
  ...

1 files changed, 85 insertions, 2 deletions

diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
index dd8219138c2e..2df67448f0d1 100644
--- a/include/linux/iio/imu/adis.h
+++ b/include/linux/iio/imu/adis.h
@@ -83,10 +83,13 @@ struct adis_data {
  * @trig: IIO trigger object data
  * @data: ADIS chip variant specific data
  * @burst: ADIS burst transfer information
+ * @burst_extra_len: Burst extra length. Should only be used by devices that can
+ *		     dynamically change their burst mode length.
  * @state_lock: Lock used by the device to protect state
  * @msg: SPI message object
  * @xfer: SPI transfer objects to be used for a @msg
  * @current_page: Some ADIS devices have registers, this selects current page
+ * @irq_flag: IRQ handling flags as passed to request_irq()
  * @buffer: Data buffer for information read from the device
  * @tx: DMA safe TX buffer for SPI transfers
  * @rx: DMA safe RX buffer for SPI transfers
@@ -97,7 +100,7 @@ struct adis {
 
 	const struct adis_data	*data;
 	struct adis_burst	*burst;
-
+	unsigned int		burst_extra_len;
 	/**
 	 * The state_lock is meant to be used during operations that require
 	 * a sequence of SPI R/W in order to protect the SPI transfer
@@ -113,6 +116,7 @@ struct adis {
 	struct spi_message	msg;
 	struct spi_transfer	*xfer;
 	unsigned int		current_page;
+	unsigned long		irq_flag;
 	void			*buffer;
 
 	uint8_t			tx[10] ____cacheline_aligned;
@@ -331,6 +335,65 @@ static inline int adis_read_reg_32(struct adis *adis, unsigned int reg,
 	return ret;
 }
 
+int __adis_update_bits_base(struct adis *adis, unsigned int reg, const u32 mask,
+			    const u32 val, u8 size);
+/**
+ * adis_update_bits_base() - ADIS Update bits function - Locked version
+ * @adis: The adis device
+ * @reg: The address of the lower of the two registers
+ * @mask: Bitmask to change
+ * @val: Value to be written
+ * @size: Size of the register to update
+ *
+ * Updates the desired bits of @reg in accordance with @mask and @val.
+ */
+static inline int adis_update_bits_base(struct adis *adis, unsigned int reg,
+					const u32 mask, const u32 val, u8 size)
+{
+	int ret;
+
+	mutex_lock(&adis->state_lock);
+	ret = __adis_update_bits_base(adis, reg, mask, val, size);
+	mutex_unlock(&adis->state_lock);
+	return ret;
+}
+
+/**
+ * adis_update_bits() - Wrapper macro for adis_update_bits_base - Locked version
+ * @adis: The adis device
+ * @reg: The address of the lower of the two registers
+ * @mask: Bitmask to change
+ * @val: Value to be written
+ *
+ * This macro evaluates the sizeof of @val at compile time and calls
+ * adis_update_bits_base() accordingly. Be aware that using MACROS/DEFINES for
+ * @val can lead to undesired behavior if the register to update is 16bit.
+ */
+#define adis_update_bits(adis, reg, mask, val) ({			\
+	BUILD_BUG_ON(sizeof(val) == 1 || sizeof(val) == 8);		\
+	__builtin_choose_expr(sizeof(val) == 4,				\
+		adis_update_bits_base(adis, reg, mask, val, 4),         \
+		adis_update_bits_base(adis, reg, mask, val, 2));	\
+})
+
+/**
+ * adis_update_bits() - Wrapper macro for adis_update_bits_base
+ * @adis: The adis device
+ * @reg: The address of the lower of the two registers
+ * @mask: Bitmask to change
+ * @val: Value to be written
+ *
+ * This macro evaluates the sizeof of @val at compile time and calls
+ * adis_update_bits_base() accordingly. Be aware that using MACROS/DEFINES for
+ * @val can lead to undesired behavior if the register to update is 16bit.
+ */
+#define __adis_update_bits(adis, reg, mask, val) ({			\
+	BUILD_BUG_ON(sizeof(val) == 1 || sizeof(val) == 8);		\
+	__builtin_choose_expr(sizeof(val) == 4,				\
+		__adis_update_bits_base(adis, reg, mask, val, 4),	\
+		__adis_update_bits_base(adis, reg, mask, val, 2));	\
+})
+
 int adis_enable_irq(struct adis *adis, bool enable);
 int __adis_check_status(struct adis *adis);
 int __adis_initial_startup(struct adis *adis);
@@ -441,18 +504,25 @@ int adis_single_conversion(struct iio_dev *indio_dev,
  * @en			burst mode enabled
  * @reg_cmd		register command that triggers burst
  * @extra_len		extra length to account in the SPI RX buffer
+ * @burst_max_len	holds the maximum burst size when the device supports
+ *			more than one burst mode with different sizes
  */
 struct adis_burst {
 	bool		en;
 	unsigned int	reg_cmd;
-	unsigned int	extra_len;
+	const u32	extra_len;
+	const u32	burst_max_len;
 };
 
+int
+devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
+				   irq_handler_t trigger_handler);
 int adis_setup_buffer_and_trigger(struct adis *adis,
 	struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void *));
 void adis_cleanup_buffer_and_trigger(struct adis *adis,
 	struct iio_dev *indio_dev);
 
+int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev);
 int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev);
 void adis_remove_trigger(struct adis *adis);
 
@@ -461,6 +531,13 @@ int adis_update_scan_mode(struct iio_dev *indio_dev,
 
 #else /* CONFIG_IIO_BUFFER */
 
+static inline int
+devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
+				   irq_handler_t trigger_handler)
+{
+	return 0;
+}
+
 static inline int adis_setup_buffer_and_trigger(struct adis *adis,
 	struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void *))
 {
@@ -472,6 +549,12 @@ static inline void adis_cleanup_buffer_and_trigger(struct adis *adis,
 {
 }
 
+static inline int devm_adis_probe_trigger(struct adis *adis,
+					  struct iio_dev *indio_dev)
+{
+	return 0;
+}
+
 static inline int adis_probe_trigger(struct adis *adis,
 	struct iio_dev *indio_dev)
 {