From: Peter Hurley <peter@hurleysoftware.com>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-serial@vger.kernel.org, Jiri Slaby <jslaby@suse.com>,
linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] serial: 8250_uniphier: add earlycon support
Date: Fri, 30 Oct 2015 09:30:21 -0400 [thread overview]
Message-ID: <563370ED.7040105@hurleysoftware.com> (raw)
In-Reply-To: <1446173176-6966-1-git-send-email-yamada.masahiro@socionext.com>
On 10/29/2015 10:46 PM, Masahiro Yamada wrote:
> This reuses the code of drivers/tty/serial/8250/8250_early.c except
>
> - Overwrite device->port.iotype and device->port.regshift for
> UPIO_MEM32 because of_setup_earlycon() has set them for UPIO_MEM.
>
> - Set device->baud to zero to prevent early8250_setup() from
> initializing the divisor register because port->uartclk does not
> match the frequency expected by this hardware.
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
WARNING: multiple messages have this Message-ID (diff)
From: peter@hurleysoftware.com (Peter Hurley)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] serial: 8250_uniphier: add earlycon support
Date: Fri, 30 Oct 2015 09:30:21 -0400 [thread overview]
Message-ID: <563370ED.7040105@hurleysoftware.com> (raw)
In-Reply-To: <1446173176-6966-1-git-send-email-yamada.masahiro@socionext.com>
On 10/29/2015 10:46 PM, Masahiro Yamada wrote:
> This reuses the code of drivers/tty/serial/8250/8250_early.c except
>
> - Overwrite device->port.iotype and device->port.regshift for
> UPIO_MEM32 because of_setup_earlycon() has set them for UPIO_MEM.
>
> - Set device->baud to zero to prevent early8250_setup() from
> initializing the divisor register because port->uartclk does not
> match the frequency expected by this hardware.
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
next prev parent reply other threads:[~2015-10-30 13:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-30 2:46 [PATCH v2] serial: 8250_uniphier: add earlycon support Masahiro Yamada
2015-10-30 2:46 ` Masahiro Yamada
2015-10-30 13:30 ` Peter Hurley [this message]
2015-10-30 13:30 ` Peter Hurley
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