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From: Icenowy Zheng <icenowy@aosc.io>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] sunxi: lower the DRAM frequency of Nano Pi NEO2 to 504MHz
Date: Thu, 02 Nov 2017 16:27:51 +0800	[thread overview]
Message-ID: <aef1518747690de40e52f5dc63affd46@aosc.io> (raw)
In-Reply-To: <CAD6G_RTmPon5EuCYf-BRM8KEAORWe-V8kcz1FXr+gqiHG4Y1qw@mail.gmail.com>

在 2017-11-02 16:25，Jagan Teki 写道：
> On Thu, Nov 2, 2017 at 9:06 AM, Icenowy Zheng <icenowy@aosc.io> wrote:
>> The BSP of Nano Pi NEO2 provided by FriendlyARM uses 504MHz DRAM
>> frequency, which is much lower than the current 672MHz used in
>> mainline.
>> 
>> Switch to use the BSP-provided frequency 504MHz for DRAM.
>> 
>> Thanks to Thomas Kaiser, who pointed out the frequency problem.
>> 
>> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>> ---
>>  configs/nanopi_neo2_defconfig | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/configs/nanopi_neo2_defconfig 
>> b/configs/nanopi_neo2_defconfig
>> index b8e089176f..e210af4f0e 100644
>> --- a/configs/nanopi_neo2_defconfig
>> +++ b/configs/nanopi_neo2_defconfig
>> @@ -1,7 +1,7 @@
>>  CONFIG_ARM=y
>>  CONFIG_ARCH_SUNXI=y
>>  CONFIG_MACH_SUN50I_H5=y
>> -CONFIG_DRAM_CLK=672
>> +CONFIG_DRAM_CLK=504
> 
> Can you point me the BSP, here what I refer to have [1]

The file at [1] is just from mainline.

The BSP configuration is at [2].

[2] 
https://github.com/friendlyarm/h5_lichee/blob/master/tools/pack/chips/sun50iw2p1/configs/cheetah-p1/board/sys_config_nanopi-neo2.fex

> 
> [1]
> https://github.com/friendlyarm/u-boot/blob/sunxi-v2017.x/configs/nanopi_neo2_defconfig
> 
> thanks!

  reply	other threads:[~2017-11-02  8:27 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-02  3:36 [U-Boot] [PATCH] sunxi: lower the DRAM frequency of Nano Pi NEO2 to 504MHz Icenowy Zheng
2017-11-02  8:25 ` Jagan Teki
2017-11-02  8:27   ` Icenowy Zheng [this message]
2017-11-02 12:43     ` Jagan Teki
2017-11-02 13:59 ` Maxime Ripard

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