| From: |
| Jun Guo <jun.guo-AT-cixtech.com> |
| To: |
| peter.chen-AT-cixtech.com, fugang.duan-AT-cixtech.com, robh-AT-kernel.org, krzk+dt-AT-kernel.org, conor+dt-AT-kernel.org, vkoul-AT-kernel.org, ychuang3-AT-nuvoton.com, schung-AT-nuvoton.com, robin.murphy-AT-arm.com, Frank.Li-AT-kernel.org |
| Subject: |
| [PATCH v3 0/3] dmaengine: arm-dma350: support combined IRQ topology |
| Date: |
| Thu, 19 Mar 2026 18:17:20 +0800 |
| Message-ID: |
| <20260319101723.246539-1-jun.guo@cixtech.com> |
| Cc: |
| dmaengine-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, cix-kernel-upstream-AT-cixtech.com, linux-arm-kernel-AT-lists.infradead.org, Jun Guo <jun.guo-AT-cixtech.com> |
| Archive-link: |
| Article |
DMA-350 can be integrated with either one interrupt per channel or a
single combined interrupt for all channels. This series adds support
for the combined IRQ topology while keeping compatibility with the
per-channel topology.
Patch 1 updates the DT binding to document both interrupt topologies
(1 combined IRQ or 8 per-channel IRQs) and keeps "arm,dma-350" as the
generic compatible, with optional SoC-specific fallback compatible.
Patch 2 updates the driver to detect IRQ topology at runtime using
platform_irq_count(), handles both modes in one code path, and enables
DMANSECCTRL.INTREN_ANYCHINTR only when combined IRQ mode is used.
Patch 3 adds the Sky1 DMA DT node using the combined IRQ topology.
The series was tested on CIX SKY1 with dmatest:
% echo 2000 > /sys/module/dmatest/parameters/timeout
% echo 1 > /sys/module/dmatest/parameters/iterations
% echo "" > /sys/module/dmatest/parameters/channel
% echo 1 > /sys/module/dmatest/parameters/run
Changes in v3:
- Rework binding compatible description to match generic-first model.
- Keep interrupts schema support for both 1-IRQ and 8-IRQ topologies.
- Drop SoC match-data dependency for IRQ mode selection.
- Detect IRQ topology via platform_irq_count() in probe path.
- Refactor IRQ handling into a shared channel handler.
- Enable DMANSECCTRL.INTREN_ANYCHINTR only in combined IRQ mode.
Changes in v2:
- Update to kernel standards, enhance patch description, and refactor
driver to use match data for hardware differentiation instead of
compatible strings.
Jun Guo (3):
dt-bindings: dma: arm-dma350: document generic and combined IRQ
topologies
dma: arm-dma350: support combined IRQ mode with runtime IRQ topology
detection
arm64: dts: cix: add DT nodes for DMA
.../devicetree/bindings/dma/arm,dma-350.yaml | 31 ++--
arch/arm64/boot/dts/cix/sky1.dtsi | 7 +
drivers/dma/arm-dma350.c | 165 +++++++++++++++---
3 files changed, 167 insertions(+), 36 deletions(-)
--
2.34.1
