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(-) -- Qualcomm INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by the Linux Foundation.
