[PATCH 0/6] [Disco SRU] Use gpiolib for chipselect in DW SPI driver

[Ike Panhc]

BugLink: https://bugs.launchpad.net/bugs/1826142

Current spi-dw-mmio driver needs hardware description from devicetree
or acpitables for chipselect but only support devicetree. Here are
patches to enable ACPI support for DW SPI driver so that the TPM
module can be supported on ACPI machines.

The first patch for spi core provides new method to set gpio pin with
gpiolib if use_gpio_descriptors=true and legacy method is still
available if use_gpio_descriptors=false.

The 2nd patch is to switch DW SPI driver to use gpiolib for
chipselect so the duplicate devicetree code can be removed.

The rest of patches are minor regression fixes collected from 
mainline about unused variable and default polarity of gpio pin.


Anders Roxell (1):
  spi: dw: fix warning unused variable 'ret'

Linus Walleij (5):
  spi: Optionally use GPIO descriptors for CS GPIOs
  spi: dw: Convert to use CS GPIO descriptors
  spi: Support high CS when using descriptors
  spi: dw: Fix default polarity of native chipselect
  gpio: of: Fix logic inversion

 drivers/gpio/gpiolib-of.c |   2 +-
 drivers/spi/spi-dw-mmio.c |  22 --------
 drivers/spi/spi-dw.c      |  15 ++----
 drivers/spi/spi.c         | 109 ++++++++++++++++++++++++++++++++++----
 include/linux/spi/spi.h   |  23 ++++++--
 5 files changed, 122 insertions(+), 49 deletions(-)

-- 
2.17.1