[PATCH v4 00/14] spi: qup: Fixes and add support for >64k transfers

Varadarajan Narayanan
2017-06-27T09:45:49Z

v4:
Discard patch #15, 'spi: qup: support for qup v1 dma'.
This depends on ADM driver, which is not upstreamed yet.

v3:
Fix git bisect-ability issues in
spi: qup: Add completion structures for DMA
spi: qup: Add completion timeout
spi: qup: Place the QUP in run mode before DMA
spi: qup: Fix transaction done signaling

v2:
Incorporate feedback from Andy Gross, Sricharan, Stanimir Varbanov

Modified the QUP-v1 dma completion sequence to QUP-v2 as per feedback.

Removed code that used controller->xfer to identify extra interrupts,
since with the fixes done to handle i/o completion we don't see
extra interrupts.

v1:
This series fixes some existing issues in the code for both
interrupt and dma mode. Patches 1 - 11 are the fixes.
Random failures/timeout are observed without these fixes.
Also, the current driver does not support block transfers > 64K
and the driver quietly fails. Patches 12 - 18 add support for this
in both interrupt and dma mode.

The entire series has been tested on ipq4019 with
SPI-NOR flash for block sizes > 64k.

Varadarajan Narayanan (14):
spi: qup: Enable chip select support
spi: qup: Setup DMA mode correctly
spi: qup: Add completion structures for DMA
spi: qup: Add completion timeout
spi: qup: Place the QUP in run mode before DMA
spi: qup: Fix error handling in spi_qup_prep_sg
spi: qup: Fix transaction done signaling
spi: qup: Do block sized read/write in block mode
spi: qup: refactor spi_qup_io_config into two functions
spi: qup: call io_config in mode specific function
spi: qup: allow block mode to generate multiple transactions
spi: qup: refactor spi_qup_prep_sg
spi: qup: allow multiple DMA transactions per spi xfer
spi: qup: Ensure done detection

drivers/spi/spi-qup.c | 597 ++++++++++++++++++++++++++++++++++----------------
1 file changed, 408 insertions(+), 189 deletions(-)