5 files changed, 38 insertions, 2 deletions
diff --git a/include/linux/iio/buffer-dma.h b/include/linux/iio/buffer-dma.h
index 5eb66a399002..4f33e6a39797 100644
--- a/include/linux/iio/buffer-dma.h
+++ b/include/linux/iio/buffer-dma.h
@@ -174,5 +174,6 @@ int iio_dma_buffer_enqueue_dmabuf(struct iio_buffer *buffer,
 				  size_t size, bool cyclic);
 void iio_dma_buffer_lock_queue(struct iio_buffer *buffer);
 void iio_dma_buffer_unlock_queue(struct iio_buffer *buffer);
+struct device *iio_dma_buffer_get_dma_dev(struct iio_buffer *buffer);
 
 #endif
diff --git a/include/linux/iio/buffer_impl.h b/include/linux/iio/buffer_impl.h
index e72552e026f3..8d770ced66b2 100644
--- a/include/linux/iio/buffer_impl.h
+++ b/include/linux/iio/buffer_impl.h
@@ -50,6 +50,7 @@ struct sg_table;
  * @enqueue_dmabuf:	called from userspace via ioctl to queue this DMABUF
  *			object to this buffer. Requires a valid DMABUF fd, that
  *			was previouly attached to this buffer.
+ * @get_dma_dev:	called to get the DMA channel associated with this buffer.
  * @lock_queue:		called when the core needs to lock the buffer queue;
  *                      it is used when enqueueing DMABUF objects.
  * @unlock_queue:       used to unlock a previously locked buffer queue
@@ -90,6 +91,7 @@ struct iio_buffer_access_funcs {
 			      struct iio_dma_buffer_block *block,
 			      struct dma_fence *fence, struct sg_table *sgt,
 			      size_t size, bool cyclic);
+	struct device * (*get_dma_dev)(struct iio_buffer *buffer);
 	void (*lock_queue)(struct iio_buffer *buffer);
 	void (*unlock_queue)(struct iio_buffer *buffer);
 
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index a8f0070c7aa9..9914dcd33e2d 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -78,6 +78,16 @@ struct cmdq_pkt {
 	void			*cl;
 };
 
+/**
+ * cmdq_get_shift_pa() - get the shift bits of physical address
+ * @chan: mailbox channel
+ *
+ * GCE can only fetch the command buffer address from a 32-bit register.
+ * Some SOCs support more than 32-bit command buffer address for GCE, which
+ * requires some shift bits to make the address fit into the 32-bit register.
+ *
+ * Return: the shift bits of physical address
+ */
 u8 cmdq_get_shift_pa(struct mbox_chan *chan);
 
 #endif /* __MTK_CMDQ_MAILBOX_H__ */
diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h
index f866d5c8ed32..c7a7719c2648 100644
--- a/include/linux/spi/spi-mem.h
+++ b/include/linux/spi/spi-mem.h
@@ -68,6 +68,9 @@ enum spi_mem_data_dir {
 	SPI_MEM_DATA_OUT,
 };
 
+#define SPI_MEM_OP_MAX_FREQ(__freq)				\
+	.max_freq = __freq
+
 /**
  * struct spi_mem_op - describes a SPI memory operation
  * @cmd.nbytes: number of opcode bytes (only 1 or 2 are valid). The opcode is
@@ -90,11 +93,16 @@ enum spi_mem_data_dir {
  * @data.buswidth: number of IO lanes used to send/receive the data
  * @data.dtr: whether the data should be sent in DTR mode or not
  * @data.ecc: whether error correction is required or not
+ * @data.swap16: whether the byte order of 16-bit words is swapped when read
+ *		 or written in Octal DTR mode compared to STR mode.
  * @data.dir: direction of the transfer
  * @data.nbytes: number of data bytes to send/receive. Can be zero if the
  *		 operation does not involve transferring data
  * @data.buf.in: input buffer (must be DMA-able)
  * @data.buf.out: output buffer (must be DMA-able)
+ * @max_freq: frequency limitation wrt this operation. 0 means there is no
+ *	      specific constraint and the highest achievable frequency can be
+ *	      attempted.
  */
 struct spi_mem_op {
 	struct {
@@ -124,7 +132,8 @@ struct spi_mem_op {
 		u8 buswidth;
 		u8 dtr : 1;
 		u8 ecc : 1;
-		u8 __pad : 6;
+		u8 swap16 : 1;
+		u8 __pad : 5;
 		enum spi_mem_data_dir dir;
 		unsigned int nbytes;
 		union {
@@ -132,14 +141,17 @@ struct spi_mem_op {
 			const void *out;
 		} buf;
 	} data;
+
+	unsigned int max_freq;
 };
 
-#define SPI_MEM_OP(__cmd, __addr, __dummy, __data)		\
+#define SPI_MEM_OP(__cmd, __addr, __dummy, __data, ...)		\
 	{							\
 		.cmd = __cmd,					\
 		.addr = __addr,					\
 		.dummy = __dummy,				\
 		.data = __data,					\
+		__VA_ARGS__					\
 	}
 
 /**
@@ -297,10 +309,15 @@ struct spi_controller_mem_ops {
  * struct spi_controller_mem_caps - SPI memory controller capabilities
  * @dtr: Supports DTR operations
  * @ecc: Supports operations with error correction
+ * @swap16: Supports swapping bytes on a 16 bit boundary when configured in
+ *	    Octal DTR
+ * @per_op_freq: Supports per operation frequency switching
  */
 struct spi_controller_mem_caps {
 	bool dtr;
 	bool ecc;
+	bool swap16;
+	bool per_op_freq;
 };
 
 #define spi_mem_controller_is_capable(ctlr, cap)	\
@@ -365,6 +382,7 @@ bool spi_mem_default_supports_op(struct spi_mem *mem,
 #endif /* CONFIG_SPI_MEM */
 
 int spi_mem_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op);
+void spi_mem_adjust_op_freq(struct spi_mem *mem, struct spi_mem_op *op);
 
 bool spi_mem_supports_op(struct spi_mem *mem,
 			 const struct spi_mem_op *op);
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index da4309f3cea3..b5d9a1d91e39 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -376,6 +376,9 @@ struct usb_gadget_ops {
  *	can handle. The UDC must support this and all slower speeds and lower
  *	number of lanes.
  * @state: the state we are now (attached, suspended, configured, etc)
+ * @state_lock: Spinlock protecting the `state` and `teardown` members.
+ * @teardown: True if the device is undergoing teardown, used to prevent
+ *	new work from being scheduled during cleanup.
  * @name: Identifies the controller hardware type.  Used in diagnostics
  *	and sometimes configuration.
  * @dev: Driver model state for this abstract device.
@@ -451,6 +454,8 @@ struct usb_gadget {
 	enum usb_ssp_rate		max_ssp_rate;
 
 	enum usb_device_state		state;
+	spinlock_t			state_lock;
+	bool				teardown;
 	const char			*name;
 	struct device			dev;
 	unsigned			isoch_delay;