[PATCH v2 0/6] spi: Add support for DMA transfers in sun4i SPI driver

From: Sergey Suloev
Date: Tue Apr 03 2018 - 11:29:17 EST

The following patchset provides corrections for PIO-mode
and support for DMA transfers in sun4i SPI driver.

Changes in v2:
1) Restored processing of 3/4 FIFO full interrupt.

2) Debug log enhancements.

Sergey Suloev (6):
spi: core: handle timeout error from transfer_one()
spi: sun4i: restrict transfer length in PIO-mode
spi: sun4i: coding style/readability improvements
spi: sun4i: use completion provided by SPI core driver
spi: sun4i: introduce register set/unset helpers
spi: sun4i: add DMA transfers support

drivers/spi/spi-sun4i.c | 442 +++++++++++++++++++++++++++++++++++++-----------
drivers/spi/spi.c | 5 +-
2 files changed, 347 insertions(+), 100 deletions(-)