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[0/4] spi: mpc8xxx_spi: bug fixes and real ->set_speed

Message ID 20200106140931.1136-1-rasmus.villemoes@prevas.dk
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Series spi: mpc8xxx_spi: bug fixes and real ->set_speed | expand

Message

Rasmus Villemoes Jan. 6, 2020, 2:09 p.m. UTC 
Patch 3/4 is the important one. Without it, reads and writes of
certain lengths from spi-nor fails, and stuff at physical address 0x0
gets overwritten even if no input buffer is supplied (e.g. when
sending a command).

Tested on an mpc8309-derived board. It would be nice if someone with
access to the gazerbeam board can test that this doesn't break that
- in particular, the "only do transfers that are multiple of 8 bits"
part.

Rasmus Villemoes (4):
  gazerbeam: add clocks property to SPI node
  mpc8xxx_spi: put max_cs to use
  mpc8xxx_spi: always use 8-bit characters, don't read or write garbage
  mpc8xxx_spi: implement real ->set_speed

 arch/powerpc/dts/gdsys/mpc8308.dtsi |   7 ++
 drivers/spi/mpc8xxx_spi.c           | 141 ++++++++++++++++------------
 2 files changed, 88 insertions(+), 60 deletions(-)