From: Ze Huang Date: Mon, 28 Apr 2025 09:24:36 +0000 (+0800) Subject: riscv: dts: sophgo: fix DMA data-width configuration for CV18xx X-Git-Tag: v6.15-rc7~32^2~4^2 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3e6244429ba38f8dee3336b8b805948276b281ab;p=thirdparty%2Flinux.git riscv: dts: sophgo: fix DMA data-width configuration for CV18xx The "snps,data-width" property[1] defines the AXI data width of the DMA controller as: width = 8 × (2^n) bits (0 = 8 bits, 1 = 16 bits, 2 = 32 bits, ..., 6 = 512 bits) where "n" is the value of "snps,data-width". For the CV18xx DMA controller, the correct AXI data width is 32 bits, corresponding to "snps,data-width = 2". Test results on Milkv Duo S can be found here [2]. Link: https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/dma/snps%2Cdw-axi-dmac.yaml#L74 [1] Link: https://gist.github.com/Sutter099/4fa99bb2d89e5af975983124704b3861 [2] Fixes: 514951a81a5e ("riscv: dts: sophgo: cv18xx: add DMA controller") Co-developed-by: Yu Yuan Signed-off-by: Yu Yuan Signed-off-by: Ze Huang Link: https://lore.kernel.org/r/20250428-duo-dma-config-v1-1-eb6ad836ca42@whut.edu.cn Signed-off-by: Inochi Amaoto Signed-off-by: Chen Wang Signed-off-by: Chen Wang --- diff --git a/arch/riscv/boot/dts/sophgo/cv18xx.dtsi b/arch/riscv/boot/dts/sophgo/cv18xx.dtsi index c18822ec849f3..58cd546392e05 100644 --- a/arch/riscv/boot/dts/sophgo/cv18xx.dtsi +++ b/arch/riscv/boot/dts/sophgo/cv18xx.dtsi @@ -341,7 +341,7 @@ 1024 1024 1024 1024>; snps,priority = <0 1 2 3 4 5 6 7>; snps,dma-masters = <2>; - snps,data-width = <4>; + snps,data-width = <2>; status = "disabled"; };