[PATCH 0/2] spi: support inter-word delays

From: Jonas Bonn
Date: Fri Jan 25 2019 - 06:44:36 EST


This short series adds support for SPI inter-word delays and configures
the spi-atmel driver to honour the setting.

Some SPI slaves are so slow that they are unable to keep up even at the
SPI controller's lowest available clock frequency. I have such a
configuration where an AVR-based SPI slave is unable to feed the SPI bus
fast enough even the SPI master runs at the lowest possible clock speed.

Jonas Bonn (2):
spi: support inter-word delay requirement for devices
spi-atmel: support inter-word delay

Documentation/devicetree/bindings/spi/spi-bus.txt | 1 +
drivers/spi/spi-atmel.c | 11 ++++++-----
drivers/spi/spi.c | 4 ++++
include/linux/spi/spi.h | 1 +
4 files changed, 12 insertions(+), 5 deletions(-)

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2.19.1