linux-kernel - Re: [PATCH v8 4/4] dmaengine: sf-pdma: Get number of channel by device tree

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Message-ID: <CAEUhbmU9ZYniNNv-WYmeTfxh5MXN1NB_fL32FiOxPpx3d2e1_A@mail.gmail.com>
Date:   Tue, 29 Mar 2022 09:35:49 +0800
From:   Bin Meng <bmeng.cn@...il.com>
To:     Zong Li <zong.li@...ive.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        krzysztof.kozlowski@...onical.com,
        Conor Dooley <conor.dooley@...rochip.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Bin Meng <bin.meng@...driver.com>,
        Green Wan <green.wan@...ive.com>, vkoul@...nel.org,
        dmaengine@...r.kernel.org, devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Palmer Dabbelt <palmer@...osinc.com>
Subject: Re: [PATCH v8 4/4] dmaengine: sf-pdma: Get number of channel by
 device tree

On Mon, Mar 28, 2022 at 7:38 PM Zong Li <zong.li@...ive.com> wrote:
>
> It currently assumes that there are always four channels, it would
> cause the error if there is actually less than four channels. Change
> that by getting number of channel from device tree.
>
> For backwards-compatibility, it uses the default value (i.e. 4) when
> there is no 'dma-channels' information in dts.
>
> Signed-off-by: Zong Li <zong.li@...ive.com>
> Acked-by: Palmer Dabbelt <palmer@...osinc.com>
> ---
>  drivers/dma/sf-pdma/sf-pdma.c | 24 ++++++++++++++++--------
>  drivers/dma/sf-pdma/sf-pdma.h |  8 ++------
>  2 files changed, 18 insertions(+), 14 deletions(-)
>

Reviewed-by: Bin Meng <bmeng.cn@...il.com>