From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Huacai Chen <chenhc@lemote.com>,
Jiaxun Yang <jiaxun.yang@flygoat.com>,
linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
Xuefeng Li <lixuefeng@loongson.cn>
Subject: Re: [PATCH v2] MIPS: Loongson: Enable devicetree based probing for 8250 ports in defconfig
Date: Mon, 18 May 2020 09:50:17 +0200 [thread overview]
Message-ID: <20200518075017.GA7697@alpha.franken.de> (raw)
In-Reply-To: <1589767861-9784-1-git-send-email-yangtiezhu@loongson.cn>
On Mon, May 18, 2020 at 10:11:01AM +0800, Tiezhu Yang wrote:
> After commit 87fcfa7b7fe6 ("MIPS: Loongson64: Add generic dts"),
> there already exists the node and property of Loongson CPU UART0
> in loongson3-package.dtsi:
>
> cpu_uart0: serial@1fe001e0 {
> compatible = "ns16550a";
> reg = <0 0x1fe001e0 0x8>;
> clock-frequency = <33000000>;
> interrupt-parent = <&liointc>;
> interrupts = <10 IRQ_TYPE_LEVEL_HIGH>;
> no-loopback-test;
> };
>
> In order to support for serial console on the Loongson platform,
> add CONFIG_SERIAL_OF_PLATFORM=y to loongson3_defconfig.
>
> With this patch, we can see the following boot messages:
>
> [ 1.877745] printk: console [ttyS0] disabled
> [ 1.881979] 1fe001e0.serial: ttyS0 at MMIO 0x1fe001e0 (irq = 16, base_baud = 2062500) is a 16550A
> [ 1.890838] printk: console [ttyS0] enabled
>
> And also, we can login normally from the serial console.
>
> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> ---
>
> v2:
> - Modify the patch subject
>
> arch/mips/configs/loongson3_defconfig | 1 +
> 1 file changed, 1 insertion(+)
applied to mips-next.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
prev parent reply other threads:[~2020-05-18 8:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-18 2:11 [PATCH v2] MIPS: Loongson: Enable devicetree based probing for 8250 ports in defconfig Tiezhu Yang
2020-05-18 7:50 ` Thomas Bogendoerfer [this message]
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