From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v3] serial: Add serial driver for Intel MID
Date: Mon, 13 Mar 2017 16:09:15 +0200 [thread overview]
Message-ID: <CAHp75Vfb4J6ee2OoGJ9sYotYgyfMJk=Z4P5mvJx1k=omnUiMeg@mail.gmail.com> (raw)
In-Reply-To: <58B94612.8020802@rock-chips.com>
On Fri, Mar 3, 2017 at 12:31 PM, Kever Yang <kever.yang@rock-chips.com> wrote:
> On 02/28/2017 08:04 PM, Andy Shevchenko wrote:
>>
>> Add a specific serial driver for Intel MID platforms.
>>
>> It has special fractional divider which can be programmed via UART_PS,
>> UART_MUL, and UART_DIV registers.
>>
>> The UART clock is calculated as
>>
>> UART clock = XTAL * UART_MUL / UART_DIV
>>
>> The baudrate is calculated as
>>
>> baud rate = UART clock / UART_PS / DLAB
>>
>> Initialize fractional divider correctly for Intel Edison platform.
>>
>> For backward compatibility we have to set initial DLAB value to 16
>> and speed to 115200 baud, where initial frequency is 29491200Hz, and
>> XTAL frequency is 38.4MHz.
> Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Thanks!
Tom et all, is it forgotten?
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2017-03-13 14:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-28 12:04 [U-Boot] [PATCH v3] serial: Add serial driver for Intel MID Andy Shevchenko
2017-03-03 4:53 ` Simon Glass
2017-03-03 10:31 ` Kever Yang
2017-03-13 14:09 ` Andy Shevchenko [this message]
2017-03-26 11:48 ` Andy Shevchenko
2017-04-01 4:22 ` Simon Glass
2017-04-10 2:01 ` Bin Meng
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