linux-kernel - Re: [PATCH] serial: 8250_early: Add earlycon support for Synopsys DesignWare ABP UART

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Message-ID: <573D1ABD.5020908@huawei.com>
Date:	Thu, 19 May 2016 09:45:33 +0800
From:	Kefeng Wang <wangkefeng.wang@...wei.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	Jiri Slaby <jslaby@...e.com>, <linux-serial@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <guohanjun@...wei.com>,
	Wei Xu <xuwei5@...ilicon.com>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	Jon Mason <jon.mason@...adcom.com>
Subject: Re: [PATCH] serial: 8250_early: Add earlycon support for Synopsys
 DesignWare ABP UART

+Cc Jon and arm-kernel mailist

Any comments, thanks.

Kefeng

On 2016/5/11 14:06, Kefeng Wang wrote:
> Some board like Hisilicon D02 uses Synopsys DesignWare ABP UART, declare an
> OF early console for it, so early console device can be enabled with comand
> line "earlycon"(without option) via the "stdout-path" property in device-tree.
> 
> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
> ---
>  drivers/tty/serial/8250/8250_early.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
> index 8d08ff5..85a12f0 100644
> --- a/drivers/tty/serial/8250/8250_early.c
> +++ b/drivers/tty/serial/8250/8250_early.c
> @@ -150,6 +150,7 @@ EARLYCON_DECLARE(uart, early_serial8250_setup);
>  OF_EARLYCON_DECLARE(ns16550, "ns16550", early_serial8250_setup);
>  OF_EARLYCON_DECLARE(ns16550a, "ns16550a", early_serial8250_setup);
>  OF_EARLYCON_DECLARE(uart, "nvidia,tegra20-uart", early_serial8250_setup);
> +OF_EARLYCON_DECLARE(uart, "snps,dw-apb-uart", early_serial8250_setup);
>  
>  #ifdef CONFIG_SERIAL_8250_OMAP
>  
>