lkml.org 
[lkml]   [2022]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v4 0/3] Determine the number of DMA channels by 'dma-channels' property
Date
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.
For backwards-compatible, it uses the default value (i.e. 4) when there
is no 'dma-channels' information in dts.

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

Changed in v4:
- Remove cflags of debug use reported-by: kernel test robot <lkp@intel.com>

Changed in v3:
- Fix allocating wrong size
- Return error if 'dma-channels' is larger than maximum

Changed in v2:
- Rebase on tag v5.16
- Use 4 as default value of dma-channels

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 | 7 +++++++
.../boot/dts/microchip/microchip-mpfs.dtsi | 1 +
arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 1 +
drivers/dma/sf-pdma/sf-pdma.c | 20 ++++++++++++-------
drivers/dma/sf-pdma/sf-pdma.h | 8 ++------
5 files changed, 24 insertions(+), 13 deletions(-)

--
2.31.1

\
 
 \ /
  Last update: 2022-01-17 02:37    [W:0.132 / U:0.400 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site