linux-kernel - Re: [PATCH] arm64: defconfig: Increase the maximum number of 8250/16550 serial ports

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Date:   Tue, 14 Dec 2021 14:19:10 +0530
From:   Apurva Nandan <a-nandan@...com>
To:     Aswath Govindraju <a-govindraju@...com>
CC:     Kishon Vijay Abraham I <kishon@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Guido Günther <agx@...xcpu.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sameer Pujar <spujar@...dia.com>,
        Zenghui Yu <yuzenghui@...wei.com>, Nishanth Menon <nm@...com>,
        Saravana Kannan <saravanak@...gle.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: defconfig: Increase the maximum number of
 8250/16550 serial ports


On 08/12/21 1:37 pm, Aswath Govindraju wrote:
> On some TI SoCs the number of UART instances used can be greater than 4.
> For example in TI's J721S2 SoC, 11th instance of UART is used as console.
> So, increase the maximum number of instances to 16.
>
> Signed-off-by: Aswath Govindraju <a-govindraju@...com>

Reviewed-by: Apurva Nandan <a-nandan@...com>

> ---
>   arch/arm64/configs/defconfig | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index 0da6a944d5cd..adb9f1f0802d 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -409,6 +409,8 @@ CONFIG_SERIAL_8250_SHARE_IRQ=y
>   CONFIG_SERIAL_8250_BCM2835AUX=y
>   CONFIG_SERIAL_8250_DW=y
>   CONFIG_SERIAL_8250_OMAP=y
> +CONFIG_SERIAL_8250_NR_UARTS=16
> +CONFIG_SERIAL_8250_RUNTIME_UARTS=16
>   CONFIG_SERIAL_8250_MT6577=y
>   CONFIG_SERIAL_8250_UNIPHIER=y
>   CONFIG_SERIAL_OF_PLATFORM=y