[0/3] Determine number of DMA channels by 'dma-channels' property

Message

Zong Li Jan. 5, 2022, 4:38 a.m. UTC

The PDMA driver currently assumes there are four channels by default, it
might cause the error if there is actually less than four channels.
Change that by getting number of channel dynamically from device tree.

This patch set contains the dts and dt-bindings change.

Zong Li (3):
  riscv: dts: Add dma-channels property in dma node
  dt-bindings: Add dma-channels for pdma device node
  dmaengine: sf-pdma: Get number of channel by device tree

 .../bindings/dma/sifive,fu540-c000-pdma.yaml      |  6 ++++++
 arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi |  1 +
 arch/riscv/boot/dts/sifive/fu540-c000.dtsi        |  1 +
 drivers/dma/sf-pdma/sf-pdma.c                     | 15 +++++++++------
 drivers/dma/sf-pdma/sf-pdma.h                     |  8 ++------
 5 files changed, 19 insertions(+), 12 deletions(-)