[v3,0/2] spi: add driver for ar934x spi controller

Message

Chuanhong Guo Feb. 7, 2020, 6:14 a.m. UTC

This controller is a superset of the already supported qca,ar7100-spi.
Besides the bit-bang mode in spi-ath79.c, this new controller added
a new "shift register" mode, allowing faster spi operations.
This mode doesn't need all the bit-bang code in spi-ath79.c and needs
a different clock setup, so I decided to write a new driver for it
instead of extending current spi-ath79 driver.

Change since v2:
fix binding documentation check.

Changes since v1:
1. change comment at the beginning to C++ style
2. rename ar934x_spi_transfer_one to ar934x_spi_transfer_one_message

Chuanhong Guo (2):
  spi: add driver for ar934x spi controller
  dt-binding: spi: add bindings for spi-ar934x

 .../bindings/spi/qca,ar934x-spi.yaml          |  40 +++
 drivers/spi/Kconfig                           |   7 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-ar934x.c                      | 229 ++++++++++++++++++
 4 files changed, 277 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/qca,ar934x-spi.yaml
 create mode 100644 drivers/spi/spi-ar934x.c