[PATCH v9 0/6] Driver for at91 usart in spi mode

[Radu Pirea]

Hello,

This is the second version of driver. I added a mfd driver which by
default probes atmel_serial driver and if in dt is specified to probe
the spi driver, then the spi-at91-usart driver will be probed. The
compatible for atmel_serial is now the compatible for at91-usart mfd
driver and compatilbe for atmel_serial driver was changed in order to
keep the bindings for serial as they are.

Changes in v9:
- minor changes
- rebased on top of broonie/for-4.19

Changes in v8:
- fixed passing an empty mfd cell if "atmel,usart-mode" value is invalid

Changes in v7:
- synced up  SPDIX license with module license
- numbering of usart modes starts from 0 insteand of 1

Changes in v6:
- removed unused compatible strings from serial and spi drivers

Changes in v5:
- fixed usage of stdout-path property with atmel_serial driver

Changes in v4:
- modified the spi driver to use cs gpio support form spi subsystem
- fixed dma transfers for serial driver
- squashed binding for spi and serial and moved them to mfd/atmel-usart.txt

Changes in v3:
- fixed spi slaves probing

Changes in v2:
- added at91-usart mfd driver
- modified spi-at91-usart driver to work as mfd driver child
- modified atmel_serial driver to work as mfd driver child

Changes in v1:
- added spi-at91-usart driver


Radu Pirea (6):
  MAINTAINERS: add at91 usart mfd driver
  dt-bindings: add binding for atmel-usart in SPI mode
  mfd: at91-usart: added mfd driver for usart
  MAINTAINERS: add at91 usart spi driver
  spi: at91-usart: add driver for at91-usart as spi
  tty/serial: atmel: change the driver to work under at91-usart mfd

 .../bindings/{serial => mfd}/atmel-usart.txt  |  25 +-
 MAINTAINERS                                   |  16 +
 drivers/mfd/Kconfig                           |   9 +
 drivers/mfd/Makefile                          |   1 +
 drivers/mfd/at91-usart.c                      |  71 +++
 drivers/spi/Kconfig                           |   9 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-at91-usart.c                  | 432 ++++++++++++++++++
 drivers/tty/serial/Kconfig                    |   1 +
 drivers/tty/serial/atmel_serial.c             |  42 +-
 include/dt-bindings/mfd/at91-usart.h          |  17 +
 11 files changed, 607 insertions(+), 17 deletions(-)
 rename Documentation/devicetree/bindings/{serial => mfd}/atmel-usart.txt (76%)
 create mode 100644 drivers/mfd/at91-usart.c
 create mode 100644 drivers/spi/spi-at91-usart.c
 create mode 100644 include/dt-bindings/mfd/at91-usart.h

-- 
2.17.1