Merge tag 'spi-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "This release sees some exciting changes from David Lechner which
  implements some optimisations that have been talked about for a long
  time which allows client drivers to pre-prepare SPI messages for
  repeated or low latency use. This lets us move work out of latency
  sensitive paths and avoid repeating work for frequently performed
  operations. As well as being useful in itself this will also be used
  in future to allow controllers to directly trigger SPI operations (eg,
  from interrupts).

  Otherwise this release has mostly been focused on cleanups, plus a
  couple of new devices:

   - Support for pre-optimising messages

   - A big set of updates from Uwe Kleine-König moving drivers to use
     APIs with more modern terminology for controllers

   - Major overhaul of the s3c64xx driver

   - Support for Google GS101 and Samsung Exynos850"

* tag 'spi-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (122 commits)
  spi: Introduce SPI_INVALID_CS and is_valid_cs()
  spi: Fix types of the last chip select storage variables
  spi: Consistently use BIT for cs_index_mask
  spi: Exctract spi_dev_check_cs() helper
  spi: Exctract spi_set_all_cs_unused() helper
  spi: s3c64xx: switch exynos850 to new port config data
  spi: s3c64xx: switch gs101 to new port config data
  spi: s3c64xx: deprecate fifo_lvl_mask, rx_lvl_offset and port_id
  spi: s3c64xx: get rid of the OF alias ID dependency
  spi: s3c64xx: introduce s3c64xx_spi_set_port_id()
  spi: s3c64xx: let the SPI core determine the bus number
  spi: s3c64xx: allow FIFO depth to be determined from the compatible
  spi: s3c64xx: retrieve the FIFO depth from the device tree
  spi: s3c64xx: determine the fifo depth only once
  spi: s3c64xx: allow full FIFO masks
  spi: s3c64xx: define a magic value
  spi: dt-bindings: introduce FIFO depth properties
  spi: axi-spi-engine: use struct_size() macro
  spi: axi-spi-engine: use __counted_by() attribute
  spi: axi-spi-engine: remove p from struct spi_engine_message_state
  ...

Author: torvalds

Documentation/devicetree/bindings/spi/atmel,at91rm9200-spi.yaml

@@ -22,7 +22,6 @@ properties:
           - const: atmel,at91rm9200-spi
       - items:
           - const: microchip,sam9x7-spi
-          - const: microchip,sam9x60-spi
           - const: atmel,at91rm9200-spi
 
   reg:

Documentation/devicetree/bindings/spi/samsung,spi.yaml

@@ -17,11 +17,13 @@ properties:
   compatible:
     oneOf:
       - enum:
+          - google,gs101-spi
           - samsung,s3c2443-spi # for S3C2443, S3C2416 and S3C2450
           - samsung,s3c6410-spi
           - samsung,s5pv210-spi # for S5PV210 and S5PC110
           - samsung,exynos4210-spi
           - samsung,exynos5433-spi
+          - samsung,exynos850-spi
           - samsung,exynosautov9-spi
           - tesla,fsd-spi
       - const: samsung,exynos7-spi
@@ -74,8 +76,6 @@ required:
   - compatible
   - clocks
   - clock-names
-  - dmas
-  - dma-names
   - interrupts
   - reg
 

Documentation/devicetree/bindings/spi/spi-controller.yaml

@@ -69,6 +69,21 @@ properties:
          Should be generally avoided and be replaced by
          spi-cs-high + ACTIVE_HIGH.
 
+  fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Size of the RX and TX data FIFOs in bytes.
+
+  rx-fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Size of the RX data FIFO in bytes.
+
+  tx-fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Size of the TX data FIFO in bytes.
+
   num-cs:
     $ref: /schemas/types.yaml#/definitions/uint32
     description:
@@ -116,6 +131,10 @@ patternProperties:
       - compatible
       - reg
 
+dependencies:
+  rx-fifo-depth: [ tx-fifo-depth ]
+  tx-fifo-depth: [ rx-fifo-depth ]
+
 allOf:
   - if:
       not:
@@ -129,6 +148,14 @@ allOf:
       properties:
         "#address-cells":
           const: 0
+  - not:
+      required:
+        - fifo-depth
+        - rx-fifo-depth
+  - not:
+      required:
+        - fifo-depth
+        - tx-fifo-depth
 
 additionalProperties: true
 

Documentation/devicetree/bindings/spi/spi-fsl-lpspi.yaml

@@ -22,6 +22,7 @@ properties:
           - enum:
               - fsl,imx8ulp-spi
               - fsl,imx93-spi
+              - fsl,imx95-spi
           - const: fsl,imx7ulp-spi
   reg:
     maxItems: 1

Documentation/devicetree/bindings/spi/spi-nxp-fspi.yaml

@@ -15,12 +15,18 @@ allOf:
 
 properties:
   compatible:
-    enum:
-      - nxp,imx8dxl-fspi
-      - nxp,imx8mm-fspi
-      - nxp,imx8mp-fspi
-      - nxp,imx8qxp-fspi
-      - nxp,lx2160a-fspi
+    oneOf:
+      - enum:
+          - nxp,imx8dxl-fspi
+          - nxp,imx8mm-fspi
+          - nxp,imx8mp-fspi
+          - nxp,imx8qxp-fspi
+          - nxp,lx2160a-fspi
+      - items:
+          - enum:
+              - nxp,imx93-fspi
+              - nxp,imx95-fspi
+          - const: nxp,imx8mm-fspi
 
   reg:
     items:

Documentation/driver-api/driver-model/devres.rst

@@ -463,7 +463,7 @@ SLAVE DMA ENGINE
 SPI
   devm_spi_alloc_master()
   devm_spi_alloc_slave()
-  devm_spi_register_master()
+  devm_spi_register_controller()
 
 WATCHDOG
   devm_watchdog_register_device()

Documentation/spi/spi-summary.rst

@@ -9,7 +9,7 @@ What is SPI?
 The "Serial Peripheral Interface" (SPI) is a synchronous four wire serial
 link used to connect microcontrollers to sensors, memory, and peripherals.
 It's a simple "de facto" standard, not complicated enough to acquire a
-standardization body.  SPI uses a master/slave configuration.
+standardization body.  SPI uses a host/target configuration.
 
 The three signal wires hold a clock (SCK, often on the order of 10 MHz),
 and parallel data lines with "Master Out, Slave In" (MOSI) or "Master In,
@@ -19,14 +19,14 @@ commonly used.  Each clock cycle shifts data out and data in; the clock
 doesn't cycle except when there is a data bit to shift.  Not all data bits
 are used though; not every protocol uses those full duplex capabilities.
 
-SPI masters use a fourth "chip select" line to activate a given SPI slave
+SPI hosts use a fourth "chip select" line to activate a given SPI target
 device, so those three signal wires may be connected to several chips
-in parallel.  All SPI slaves support chipselects; they are usually active
-low signals, labeled nCSx for slave 'x' (e.g. nCS0).  Some devices have
-other signals, often including an interrupt to the master.
+in parallel.  All SPI targets support chipselects; they are usually active
+low signals, labeled nCSx for target 'x' (e.g. nCS0).  Some devices have
+other signals, often including an interrupt to the host.
 
 Unlike serial busses like USB or SMBus, even low level protocols for
-SPI slave functions are usually not interoperable between vendors
+SPI target functions are usually not interoperable between vendors
 (except for commodities like SPI memory chips).
 
   - SPI may be used for request/response style device protocols, as with
@@ -43,10 +43,10 @@ SPI slave functions are usually not interoperable between vendors
 
   - Sometimes SPI is used to daisy-chain devices, like shift registers.
 
-In the same way, SPI slaves will only rarely support any kind of automatic
-discovery/enumeration protocol.  The tree of slave devices accessible from
-a given SPI master will normally be set up manually, with configuration
-tables.
+In the same way, SPI targets will only rarely support any kind of automatic
+discovery/enumeration protocol. The tree of target devices accessible from
+a given SPI host controller will normally be set up manually, with
+configuration tables.
 
 SPI is only one of the names used by such four-wire protocols, and
 most controllers have no problem handling "MicroWire" (think of it as
@@ -62,8 +62,8 @@ course they won't handle full duplex transfers.  You may find such
 chips described as using "three wire" signaling: SCK, data, nCSx.
 (That data line is sometimes called MOMI or SISO.)
 
-Microcontrollers often support both master and slave sides of the SPI
-protocol.  This document (and Linux) supports both the master and slave
+Microcontrollers often support both host and target sides of the SPI
+protocol.  This document (and Linux) supports both the host and target
 sides of SPI interactions.
 
 
@@ -75,7 +75,7 @@ protocol supported by every MMC or SD memory card.  (The older "DataFlash"
 cards, predating MMC cards but using the same connectors and card shape,
 support only SPI.)  Some PC hardware uses SPI flash for BIOS code.
 
-SPI slave chips range from digital/analog converters used for analog
+SPI target chips range from digital/analog converters used for analog
 sensors and codecs, to memory, to peripherals like USB controllers
 or Ethernet adapters; and more.
 
@@ -118,8 +118,8 @@ starting low (CPOL=0) and data stabilized for sampling during the
 trailing clock edge (CPHA=1), that's SPI mode 1.
 
 Note that the clock mode is relevant as soon as the chipselect goes
-active.  So the master must set the clock to inactive before selecting
-a slave, and the slave can tell the chosen polarity by sampling the
+active.  So the host must set the clock to inactive before selecting
+a target, and the target can tell the chosen polarity by sampling the
 clock level when its select line goes active.  That's why many devices
 support for example both modes 0 and 3:  they don't care about polarity,
 and always clock data in/out on rising clock edges.
@@ -142,13 +142,13 @@ There are two types of SPI driver, here called:
 
   Controller drivers ...
         controllers may be built into System-On-Chip
-	processors, and often support both Master and Slave roles.
+	processors, and often support both Controller and target roles.
 	These drivers touch hardware registers and may use DMA.
 	Or they can be PIO bitbangers, needing just GPIO pins.
 
   Protocol drivers ...
         these pass messages through the controller
-	driver to communicate with a Slave or Master device on the
+	driver to communicate with a target or Controller device on the
 	other side of an SPI link.
 
 So for example one protocol driver might talk to the MTD layer to export
@@ -179,22 +179,22 @@ shows up in sysfs in several locations::
    /sys/bus/spi/drivers/D ... driver for one or more spi*.* devices
 
    /sys/class/spi_master/spiB ... symlink to a logical node which could hold
-	class related state for the SPI master controller managing bus "B".
+	class related state for the SPI host controller managing bus "B".
 	All spiB.* devices share one physical SPI bus segment, with SCLK,
 	MOSI, and MISO.
 
    /sys/devices/.../CTLR/slave ... virtual file for (un)registering the
-	slave device for an SPI slave controller.
-	Writing the driver name of an SPI slave handler to this file
-	registers the slave device; writing "(null)" unregisters the slave
+	target device for an SPI target controller.
+	Writing the driver name of an SPI target handler to this file
+	registers the target device; writing "(null)" unregisters the target
 	device.
-	Reading from this file shows the name of the slave device ("(null)"
+	Reading from this file shows the name of the target device ("(null)"
 	if not registered).
 
    /sys/class/spi_slave/spiB ... symlink to a logical node which could hold
-	class related state for the SPI slave controller on bus "B".  When
+	class related state for the SPI target controller on bus "B".  When
 	registered, a single spiB.* device is present here, possible sharing
-	the physical SPI bus segment with other SPI slave devices.
+	the physical SPI bus segment with other SPI target devices.
 
 At this time, the only class-specific state is the bus number ("B" in "spiB"),
 so those /sys/class entries are only useful to quickly identify busses.
@@ -270,10 +270,10 @@ same SOC controller is used.  For example, on one board SPI might use
 an external clock, where another derives the SPI clock from current
 settings of some master clock.
 
-Declare Slave Devices
-^^^^^^^^^^^^^^^^^^^^^
+Declare target Devices
+^^^^^^^^^^^^^^^^^^^^^^
 
-The second kind of information is a list of what SPI slave devices exist
+The second kind of information is a list of what SPI target devices exist
 on the target board, often with some board-specific data needed for the
 driver to work correctly.
 
@@ -316,7 +316,7 @@ sharing a bus with a device that interprets chipselect "backwards" is
 not possible until the infrastructure knows how to deselect it.
 
 Then your board initialization code would register that table with the SPI
-infrastructure, so that it's available later when the SPI master controller
+infrastructure, so that it's available later when the SPI host controller
 driver is registered::
 
 	spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
@@ -469,39 +469,39 @@ routines are available to allocate and zero-initialize an spi_message
 with several transfers.
 
 
-How do I write an "SPI Master Controller Driver"?
+How do I write an "SPI Controller Driver"?
 -------------------------------------------------
 An SPI controller will probably be registered on the platform_bus; write
 a driver to bind to the device, whichever bus is involved.
 
-The main task of this type of driver is to provide an "spi_master".
-Use spi_alloc_master() to allocate the master, and spi_master_get_devdata()
-to get the driver-private data allocated for that device.
+The main task of this type of driver is to provide an "spi_controller".
+Use spi_alloc_host() to allocate the host controller, and
+spi_controller_get_devdata() to get the driver-private data allocated for that
+device.
 
 ::
 
-	struct spi_master	*master;
+	struct spi_controller	*ctlr;
 	struct CONTROLLER	*c;
 
-	master = spi_alloc_master(dev, sizeof *c);
-	if (!master)
+	ctlr = spi_alloc_host(dev, sizeof *c);
+	if (!ctlr)
 		return -ENODEV;
 
-	c = spi_master_get_devdata(master);
+	c = spi_controller_get_devdata(ctlr);
 
-The driver will initialize the fields of that spi_master, including the
-bus number (maybe the same as the platform device ID) and three methods
-used to interact with the SPI core and SPI protocol drivers.  It will
-also initialize its own internal state.  (See below about bus numbering
-and those methods.)
+The driver will initialize the fields of that spi_controller, including the bus
+number (maybe the same as the platform device ID) and three methods used to
+interact with the SPI core and SPI protocol drivers.  It will also initialize
+its own internal state.  (See below about bus numbering and those methods.)
 
-After you initialize the spi_master, then use spi_register_master() to
+After you initialize the spi_controller, then use spi_register_controller() to
 publish it to the rest of the system. At that time, device nodes for the
 controller and any predeclared spi devices will be made available, and
 the driver model core will take care of binding them to drivers.
 
-If you need to remove your SPI controller driver, spi_unregister_master()
-will reverse the effect of spi_register_master().
+If you need to remove your SPI controller driver, spi_unregister_controller()
+will reverse the effect of spi_register_controller().
 
 
 Bus Numbering
@@ -519,49 +519,49 @@ then be replaced by a dynamically assigned number. You'd then need to treat
 this as a non-static configuration (see above).
 
 
-SPI Master Methods
-^^^^^^^^^^^^^^^^^^
+SPI Host Controller Methods
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-``master->setup(struct spi_device *spi)``
+``ctlr->setup(struct spi_device *spi)``
 	This sets up the device clock rate, SPI mode, and word sizes.
 	Drivers may change the defaults provided by board_info, and then
 	call spi_setup(spi) to invoke this routine.  It may sleep.
 
-	Unless each SPI slave has its own configuration registers, don't
+	Unless each SPI target has its own configuration registers, don't
 	change them right away ... otherwise drivers could corrupt I/O
 	that's in progress for other SPI devices.
 
 	.. note::
 
 		BUG ALERT:  for some reason the first version of
-		many spi_master drivers seems to get this wrong.
+		many spi_controller drivers seems to get this wrong.
 		When you code setup(), ASSUME that the controller
 		is actively processing transfers for another device.
 
-``master->cleanup(struct spi_device *spi)``
+``ctlr->cleanup(struct spi_device *spi)``
 	Your controller driver may use spi_device.controller_state to hold
 	state it dynamically associates with that device.  If you do that,
 	be sure to provide the cleanup() method to free that state.
 
-``master->prepare_transfer_hardware(struct spi_master *master)``
+``ctlr->prepare_transfer_hardware(struct spi_controller *ctlr)``
 	This will be called by the queue mechanism to signal to the driver
 	that a message is coming in soon, so the subsystem requests the
 	driver to prepare the transfer hardware by issuing this call.
 	This may sleep.
 
-``master->unprepare_transfer_hardware(struct spi_master *master)``
+``ctlr->unprepare_transfer_hardware(struct spi_controller *ctlr)``
 	This will be called by the queue mechanism to signal to the driver
 	that there are no more messages pending in the queue and it may
 	relax the hardware (e.g. by power management calls). This may sleep.
 
-``master->transfer_one_message(struct spi_master *master, struct spi_message *mesg)``
+``ctlr->transfer_one_message(struct spi_controller *ctlr, struct spi_message *mesg)``
 	The subsystem calls the driver to transfer a single message while
 	queuing transfers that arrive in the meantime. When the driver is
 	finished with this message, it must call
 	spi_finalize_current_message() so the subsystem can issue the next
 	message. This may sleep.
 
-``master->transfer_one(struct spi_master *master, struct spi_device *spi, struct spi_transfer *transfer)``
+``ctrl->transfer_one(struct spi_controller *ctlr, struct spi_device *spi, struct spi_transfer *transfer)``
 	The subsystem calls the driver to transfer a single transfer while
 	queuing transfers that arrive in the meantime. When the driver is
 	finished with this transfer, it must call
@@ -576,15 +576,15 @@ SPI Master Methods
 	* 0: transfer is finished
 	* 1: transfer is still in progress
 
-``master->set_cs_timing(struct spi_device *spi, u8 setup_clk_cycles, u8 hold_clk_cycles, u8 inactive_clk_cycles)``
-	This method allows SPI client drivers to request SPI master controller
+``ctrl->set_cs_timing(struct spi_device *spi, u8 setup_clk_cycles, u8 hold_clk_cycles, u8 inactive_clk_cycles)``
+	This method allows SPI client drivers to request SPI host controller
 	for configuring device specific CS setup, hold and inactive timing
 	requirements.
 
 Deprecated Methods
 ^^^^^^^^^^^^^^^^^^
 
-``master->transfer(struct spi_device *spi, struct spi_message *message)``
+``ctrl->transfer(struct spi_device *spi, struct spi_message *message)``
 	This must not sleep. Its responsibility is to arrange that the
 	transfer happens and its complete() callback is issued. The two
 	will normally happen later, after other transfers complete, and