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spi: Updates for v4.16

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Quite a quiet release for SPI, there are no changes at all to the core
 and not that many changes to drivers.  Highlights of those driver
 changes include:
 
  - SH MSIOF support for GPIO chip selects contributed by Geert
    Uytterhoeven.
  - Full duplex support for a3700 contributed by Maxime Chevallier.
  - Support for DMA transfers on Atmel devices that require a bounce
    buffer contributed by Radu Pirea.
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Merge tag 'spi-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "Quite a quiet release for SPI, there are no changes at all to the core
  and not that many changes to drivers. Highlights of those driver
  changes include:

   - SH MSIOF support for GPIO chip selects contributed by Geert
     Uytterhoeven.

   - Full duplex support for a3700 contributed by Maxime Chevallier.

   - Support for DMA transfers on Atmel devices that require a bounce
     buffer contributed by Radu Pirea"

* tag 'spi-v4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (31 commits)
  spi: dw: Remove unused members from struct chip_data
  spi: orion: Fix a resource leak if the optional "axi" clk is deferred
  spi: a3700: Remove endianness swapping for full-duplex transfers
  spi: a3700: Remove endianness swapping functions when accessing FIFOs
  spi: a3700: Add full-duplex support
  spi: a3700: Allow to enable or disable FIFO mode
  spi: a3700: Set frequency limits at startup
  spi: a3700: Clear DATA_OUT when performing a read
  spi: orion: Fix clock resource by adding an optional bus clock
  spi: s3c64xx: add SPDX identifier
  spi: imx: do not access registers while clocks disabled
  spi: atmel: Implements transfers with bounce buffer
  spi: sh-msiof: Fix timeout failures for TX-only DMA transfers
  spi: spi-fsl-dspi: account for const type of of_device_id.data
  spi: bcm53xx: simplify reading SPI data
  spi: sirf: account for const type of of_device_id.data
  spi: pxa2xx: Use gpiod_put() not gpiod_free()
  spi: pxa2xx: avoid redundant gpio_to_desc(desc_to_gpio()) round-trip
  spi: sh-msiof: Document hardware limitations related to chip selects
  spi: sh-msiof: Implement cs-gpios configuration
  ...
This commit is contained in:
Linus Torvalds 2018-01-29 11:30:16 -08:00
commit 8e3264710c
21 changed files with 378 additions and 132 deletions
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16
Documentation/devicetree/bindings/spi/sh-msiof.txt
View file

@ -36,7 +36,21 @@ Required properties:
Optional properties:
- clocks : Must contain a reference to the functional clock.
- num-cs : Total number of chip-selects (default is 1)
- num-cs : Total number of chip selects (default is 1).
Up to 3 native chip selects are supported:
0: MSIOF_SYNC
1: MSIOF_SS1
2: MSIOF_SS2
Hardware limitations related to chip selects:
- Native chip selects are always deasserted in
between transfers that are part of the same
message. Use cs-gpios to work around this.
- All slaves using native chip selects must use the
same spi-cs-high configuration. Use cs-gpios to
work around this.
- When using GPIO chip selects, at least one native
chip select must be left unused, as it will be
driven anyway.
- dmas : Must contain a list of two references to DMA
specifiers, one for transmission, and one for
reception.

4
Documentation/devicetree/bindings/spi/spi-meson.txt
View file

@ -27,7 +27,9 @@ The Meson SPICC is generic SPI controller for general purpose Full-Duplex
communications with dedicated 16 words RX/TX PIO FIFOs.
Required properties:
- compatible: should be "amlogic,meson-gx-spicc" on Amlogic GX SoCs.
- compatible: should be:
"amlogic,meson-gx-spicc" on Amlogic GX and compatible SoCs.
"amlogic,meson-axg-spicc" on Amlogic AXG and compatible SoCs
- reg: physical base address and length of the controller registers
- interrupts: The interrupt specifier
- clock-names: Must contain "core"

9
Documentation/devicetree/bindings/spi/spi-orion.txt
View file

@ -18,8 +18,17 @@ Required properties:
The eight register sets following the control registers refer to
chip-select lines 0 through 7 respectively.
- cell-index : Which of multiple SPI controllers is this.
- clocks : pointers to the reference clocks for this device, the first
one is the one used for the clock on the spi bus, the
second one is optional and is the clock used for the
functional part of the controller
Optional properties:
- interrupts : Is currently not used.
- clock-names : names of used clocks, mandatory if the second clock is
used, the name must be "core", and "axi" (the latter
is only for Armada 7K/8K).
Example:
spi@10600 {

2
Documentation/devicetree/bindings/spi/spi-xilinx.txt
View file

@ -2,7 +2,7 @@ Xilinx SPI controller Device Tree Bindings
-------------------------------------------------
Required properties:
- compatible : Should be "xlnx,xps-spi-2.00.a" or "xlnx,xps-spi-2.00.b"
- compatible : Should be "xlnx,xps-spi-2.00.a", "xlnx,xps-spi-2.00.b" or "xlnx,axi-quad-spi-1.00.a"
- reg : Physical base address and size of SPI registers map.
- interrupts : Property with a value describing the interrupt
number.