[PATCH v6, 0/8] Broadcom stb, and iProc SoC QSPI driver

[Kamal Dasu <kdasu.kdev@xxxxxxxxx>]

This is v6 changes for common spi driver for the brcmstb, nsp, ns2, cygnus
iProc SoCs. Changes include driver for standard MSPI and accelerated BSPI
blocks.The Brodcom STB uses l2-intc where as the SoC specific interrupt 
handling code has been separated in a new  driver. In case iProc SoCs it does
not have a dedicated l2 controller and the interrupts are specific to the 
spi core. The drivers are organized in the following way:
 
 drivers/spi/spi-bcm-qspi.c      - Common MSPI, BSPI driver

 drivers/spi/spi-bcm-qspi.h      - Common header 

 drivers/spi/spi-brcmstb-qspi.c  - SoC specific wth brcm,spi-brcmstb-qspi 
                                   compatibility, does not have anything 
                                   specific for stb SoC

 drivers/spi/spi-iproc-qspi.c      - Implements the interrupt hooks used by 
                                   the common driver with "brcm,spi-nsp-qspi"
                                   compatibility

V6 Changes 
----------

Bindings Documentation:
- Changed subject to spi:
- Squashed all SoCs bindings in one commit 
- Removed clock-frequency redundant parameter from main spi node

spi-bcm-qspi 
- Removed redundant transfer delays, let core handle it
- Removed chip select changes, let core handle it
- Use of named labels in probe function
- Add comments for the exported symbols for probe, remove, pm_ops
  suspend/resume, to be called by the SoC platform driver
- Remove redundant clock-frequency parsing
- Removed retry logic code from BSPI
- Use of big_endian as input parameter to the r/w inline function
- Suspend/resume uses spi core msg queue suspend and resume calls
- Other code cleanup to remove unused code

spi-brcmstb-qspi
-Separated just separated the commit

spi-iproc-qspi
- Changes name to spi-iproc-qspi
- Read the dt native endian locally and stored in soc structure
  to pass to r/w macro

mtd/devices/m25p80 
- Made a change to be able to fallback to normal spi read
  when the accelarated read function does not get aligned 
  buffers, feature used by the BSPI spi_flash_read() method

Kamal Dasu (8):
  spi: Broadcom BRCMSTB, NSP, NS2 SoC bindings
  spi: bcm-qspi: Add Broadcom MSPI driver
  spi: brcmstb-qspi: Broadcom settop platform driver
  spi: bcm-qspi: Add BSPI spi-nor flash controller driver
  mtd: m25p80: Let m25p80_read() fallback to spi transfer
  arm: dts: Add bcm-nsp and bcm958625k support
  arm64: dts: Add ns2 SoC support
  spi: iproc-qspi: Add Broadcom iProc SoCs support

 .../devicetree/bindings/spi/brcm,spi-bcm-qspi.txt  |  233 ++++
 arch/arm/boot/dts/bcm-nsp.dtsi                     |   31 +-
 arch/arm/boot/dts/bcm958625k.dts                   |   34 +
 arch/arm64/boot/dts/broadcom/ns2-svk.dts           |   34 +
 arch/arm64/boot/dts/broadcom/ns2.dtsi              |   18 +
 drivers/mtd/devices/m25p80.c                       |   11 +-
 drivers/spi/Kconfig                                |   10 +
 drivers/spi/Makefile                               |    1 +
 drivers/spi/spi-bcm-qspi.c                         | 1400 ++++++++++++++++++++
 drivers/spi/spi-bcm-qspi.h                         |  115 ++
 drivers/spi/spi-brcmstb-qspi.c                     |   53 +
 drivers/spi/spi-iproc-qspi.c                       |  163 +++
 12 files changed, 2100 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt
 create mode 100644 drivers/spi/spi-bcm-qspi.c
 create mode 100644 drivers/spi/spi-bcm-qspi.h
 create mode 100644 drivers/spi/spi-brcmstb-qspi.c
 create mode 100644 drivers/spi/spi-iproc-qspi.c

-- 
1.9.1

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