linux-kernel - Re: [PATCH v2 08/11] serial: 8250

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Message-ID: <CAJF2gTR7xzGvQeewuhRLHE2yjH8zeDMj4qfE4_W-yb71-Zx6Zg@mail.gmail.com>
Date:   Wed, 20 Sep 2023 15:53:53 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Chen Wang <unicornxw@...il.com>
Cc:     aou@...s.berkeley.edu, chao.wei@...hgo.com, conor@...nel.org,
        devicetree@...r.kernel.org, emil.renner.berthing@...onical.com,
        jszhang@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        palmer@...belt.com, paul.walmsley@...ive.com, robh+dt@...nel.org,
        xiaoguang.xing@...hgo.com, Chen Wang <wangchen20@...as.ac.cn>
Subject: Re: [PATCH v2 08/11] serial: 8250_dw: Add Sophgo SG2042 support

On Wed, Sep 20, 2023 at 2:40 PM Chen Wang <unicornxw@...il.com> wrote:
>
> From: Emil Renner Berthing <emil.renner.berthing@...onical.com>
>
> Add quirk to skip setting the input clock rate for the uarts on the
> Sophgo SG2042 SoC similar to the StarFive JH7100.
>
> Signed-off-by: Emil Renner Berthing <emil.renner.berthing@...onical.com>
> Signed-off-by: Chen Wang <wangchen20@...as.ac.cn>
> ---
>  drivers/tty/serial/8250/8250_dw.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
> index f4cafca1a7da..6c344877a07f 100644
> --- a/drivers/tty/serial/8250/8250_dw.c
> +++ b/drivers/tty/serial/8250/8250_dw.c
> @@ -770,7 +770,7 @@ static const struct dw8250_platform_data dw8250_renesas_rzn1_data = {
>         .quirks = DW_UART_QUIRK_IS_DMA_FC,
>  };
>
> -static const struct dw8250_platform_data dw8250_starfive_jh7100_data = {
> +static const struct dw8250_platform_data dw8250_skip_set_rate_data = {
>         .usr_reg = DW_UART_USR,
>         .quirks = DW_UART_QUIRK_SKIP_SET_RATE,
>  };
> @@ -780,7 +780,8 @@ static const struct of_device_id dw8250_of_match[] = {
>         { .compatible = "cavium,octeon-3860-uart", .data = &dw8250_octeon_3860_data },
>         { .compatible = "marvell,armada-38x-uart", .data = &dw8250_armada_38x_data },
>         { .compatible = "renesas,rzn1-uart", .data = &dw8250_renesas_rzn1_data },
> -       { .compatible = "starfive,jh7100-uart", .data = &dw8250_starfive_jh7100_data },
> +       { .compatible = "sophgo,sg2042-uart", .data = &dw8250_skip_set_rate_data },
> +       { .compatible = "starfive,jh7100-uart", .data = &dw8250_skip_set_rate_data },
Why shall we touch the jh7100 stuff in this patch?

>         { /* Sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, dw8250_of_match);
> --
> 2.25.1
>


-- 
Best Regards
 Guo Ren