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[0/8] spi: rspi: Bit rate improvements

Message ID 20200608095940.30516-1-geert+renesas@glider.be
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Series spi: rspi: Bit rate improvements | expand

Message

Geert Uytterhoeven June 8, 2020, 9:59 a.m. UTC 
Hi Mark,

This patch series contains several improvements for the Renesas SPI/QSPI
driver related to bit rate configuration.

This has been tested on RSK+RZA1 (RSPI) and R-Car M2-W/Koelsch (QSPI),
using a scope and logic analyzer, except for the by-one divider on QSPI.
This has not been tested on legacy SuperH, due to lack of hardware.

Thanks for your comments!

Geert Uytterhoeven (8):
  spi: rspi: Remove useless .set_config_register() check
  spi: rspi: Use requested instead of maximum bit rate
  spi: rspi: Clean up Bit Rate Division Setting handling
  spi: rspi: Increase bit rate accuracy on RZ/A
  spi: rspi: Increase bit rate range for RSPI on SH
  spi: rspi: Increase bit rate range for QSPI
  spi: rspi: Fill in spi_transfer.effective_speed_hz
  spi: rspi: Fill in controller speed limits

 drivers/spi/spi-rspi.c | 101 ++++++++++++++++++++++++++++-------------
 1 file changed, 69 insertions(+), 32 deletions(-)