From: David Brown <davidb@codeaurora.org>
To: Stephen Boyd <sboyd@codeaurora.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-serial@vger.kernel.org
Subject: Re: [PATCH 3/4] msm_serial: Make baud_code detection more dynamic
Date: Wed, 24 Jul 2013 13:30:26 -0700 [thread overview]
Message-ID: <20130724203026.GD10926@codeaurora.org> (raw)
In-Reply-To: <1374691051-28544-4-git-send-email-sboyd@codeaurora.org>
On Wed, Jul 24, 2013 at 11:37:30AM -0700, Stephen Boyd wrote:
>Currently msm_set_baud_rate() assumes the uart clock rate is
>1.8432 MHz. This is not always true, and limits our options to
>program the baud rate. Instead of assuming the rate and
>hard-coding the baud_code based on it, calculate the divider that
>we want and try to find the closest baud_code that matches. This
>allows us to support uarts with faster clock speeds.
>
>Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
>---
> drivers/tty/serial/msm_serial.c | 98 ++++++++++++++++++-----------------------
> drivers/tty/serial/msm_serial.h | 18 ++------
> 2 files changed, 48 insertions(+), 68 deletions(-)
Acked-by: David Brown <davidb@codeaurora.org>
--
sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation
WARNING: multiple messages have this Message-ID (diff)
From: davidb@codeaurora.org (David Brown)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/4] msm_serial: Make baud_code detection more dynamic
Date: Wed, 24 Jul 2013 13:30:26 -0700 [thread overview]
Message-ID: <20130724203026.GD10926@codeaurora.org> (raw)
In-Reply-To: <1374691051-28544-4-git-send-email-sboyd@codeaurora.org>
On Wed, Jul 24, 2013 at 11:37:30AM -0700, Stephen Boyd wrote:
>Currently msm_set_baud_rate() assumes the uart clock rate is
>1.8432 MHz. This is not always true, and limits our options to
>program the baud rate. Instead of assuming the rate and
>hard-coding the baud_code based on it, calculate the divider that
>we want and try to find the closest baud_code that matches. This
>allows us to support uarts with faster clock speeds.
>
>Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
>---
> drivers/tty/serial/msm_serial.c | 98 ++++++++++++++++++-----------------------
> drivers/tty/serial/msm_serial.h | 18 ++------
> 2 files changed, 48 insertions(+), 68 deletions(-)
Acked-by: David Brown <davidb@codeaurora.org>
--
sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation
next prev parent reply other threads:[~2013-07-24 20:30 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-24 18:37 [PATCH 0/4] msm_serial fixes and improvements Stephen Boyd
2013-07-24 18:37 ` Stephen Boyd
2013-07-24 18:37 ` [PATCH 1/4] msm_serial: Fix NUL byte output on UARTDM Stephen Boyd
2013-07-24 18:37 ` Stephen Boyd
2013-07-24 20:29 ` David Brown
2013-07-24 20:29 ` David Brown
2013-07-24 18:37 ` [PATCH 2/4] msm_serial: Fix sparse warnings Stephen Boyd
2013-07-24 18:37 ` Stephen Boyd
2013-07-24 20:30 ` David Brown
2013-07-24 20:30 ` David Brown
2013-07-24 18:37 ` [PATCH 3/4] msm_serial: Make baud_code detection more dynamic Stephen Boyd
2013-07-24 18:37 ` Stephen Boyd
2013-07-24 20:30 ` David Brown [this message]
2013-07-24 20:30 ` David Brown
2013-07-26 4:30 ` Bjorn Andersson
2013-07-26 4:30 ` Bjorn Andersson
2013-07-26 17:05 ` Stephen Boyd
2013-07-26 17:05 ` Stephen Boyd
2013-07-24 18:37 ` [PATCH 4/4] msm_serial: Send more than 1 character at a time on UARTDM Stephen Boyd
2013-07-24 18:37 ` Stephen Boyd
2013-07-24 20:31 ` David Brown
2013-07-24 20:31 ` David Brown
2013-07-24 20:31 ` [PATCH 0/4] msm_serial fixes and improvements David Brown
2013-07-24 20:31 ` David Brown
2013-07-29 9:31 ` Ivan T. Ivanov
2013-07-29 9:31 ` Ivan T. Ivanov
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