[0/7,v1] SPI CS using GPIO descriptors

Message

Linus Walleij Dec. 15, 2018, 11:38 p.m. UTC

This is a first version of trying to pull GPIO descriptor
handling of SPI chip selects into the SPI core.

The core grows a bit, bit handles descriptors in addition
to the already handled DT and static GPIO lines, and then
I start converting over some drivers to show the utility
of pulling this into the core.

There are *many* drivers to convert.

This should also cover the ACPI usecase by way of the
completely generic GPIO descriptor handling code that
simply picks the GPIO "cs" descriptors associated with
the device.

Linus Walleij (7):
  spi: Optionally use GPIO descriptors for CS GPIOs
  spi: ath79: Convert to use CS GPIO descriptors
  spi: atmel: Convert to use CS GPIO descriptors
  spi: cadence: Convert to use CS GPIO descriptors
  spi: clps711x: Convert to use CS GPIO descriptors
  spi: davinci: Convert to use CS GPIO descriptors
  spi: dw: Convert to use CS GPIO descriptors

 drivers/spi/spi-ath79.c    |  42 +++++----------
 drivers/spi/spi-atmel.c    |  93 ++++++++++----------------------
 drivers/spi/spi-cadence.c  |  67 +----------------------
 drivers/spi/spi-clps711x.c |  23 +-------
 drivers/spi/spi-davinci.c  |  53 +++++--------------
 drivers/spi/spi-dw-mmio.c  |  22 --------
 drivers/spi/spi-dw.c       |   9 +---
 drivers/spi/spi.c          | 105 +++++++++++++++++++++++++++++++++----
 include/linux/spi/spi.h    |  23 ++++++--
 9 files changed, 173 insertions(+), 264 deletions(-)