[PATCH 0/2] spi: Add DMA mode support to spi-qcom-qspi

[Vijaya Krishna Nivarthi]

There are large number of QSPI irqs that fire during boot/init and later
on every suspend/resume.
This could be made faster by doing DMA instead of PIO.
Below is comparison for number of interrupts raised in 2 acenarios...
Boot up and stabilise
Suspend/Resume

Sequence   PIO    DMA
=======================
Boot-up    69088  19284
S/R        5066   3430

Vijaya Krishna Nivarthi (2):
  arm64: dts: qcom: sc7280: Add stream-id of qspi to iommus
  spi: spi-qcom-qspi: Add DMA mode support

 arch/arm64/boot/dts/qcom/sc7280.dtsi |   1 +
 drivers/spi/spi-qcom-qspi.c          | 429 ++++++++++++++++++++++++++++++++---
 2 files changed, 399 insertions(+), 31 deletions(-)

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