Re: [U-Boot] [PATCH] arm: ls1021atwr: optimize the deep sleep latency

2015-10-30 Thread York Sun
On 09/24/2015 12:52 AM, Tang Yuantian wrote: > It will take more than 1s when wake up from deep sleep. Most of the > time is spent on outputing information. This patch reduced the deep > sleep latency by: > 1. avoid outputing system informaton > 2. remove flush cache after DDR restore > 3. skip r

Re: [U-Boot] [PATCH] arm: ls1021atwr: optimize the deep sleep latency

2015-10-15 Thread York Sun
>> Yuantian, >> >> Please explain more why the second stage u-boot is reserved? Wouldn't >> Linux overwrite the memory? >> > If both CONFIG_DEEP_SLEEP and CONFIG_SD_BOOT are defined, > The DDR memory the second stage uboot occupied whould be reserved. > It is achieved in commit: 41ba57d0c which is

Re: [U-Boot] [PATCH] arm: ls1021atwr: optimize the deep sleep latency

2015-10-14 Thread Yuantian Tang
Hi York, > -Original Message- > From: York Sun [mailto:york...@freescale.com] > Sent: Thursday, October 15, 2015 5:34 AM > To: Tang Yuantian-B29983 > Cc: u-boot@lists.denx.de; Wang Huan-B18965 ; > Kushwaha Prabhakar-B32579 > Subject: Re: [PATCH] arm: ls1021atwr: optimize the deep sleep l

Re: [U-Boot] [PATCH] arm: ls1021atwr: optimize the deep sleep latency

2015-10-14 Thread York Sun
On 09/24/2015 12:52 AM, Tang Yuantian wrote: > It will take more than 1s when wake up from deep sleep. Most of the > time is spent on outputing information. This patch reduced the deep > sleep latency by: > 1. avoid outputing system informaton > 2. remove flush cache after DDR restore > 3. skip r

[U-Boot] [PATCH] arm: ls1021atwr: optimize the deep sleep latency

2015-09-24 Thread Tang Yuantian
It will take more than 1s when wake up from deep sleep. Most of the time is spent on outputing information. This patch reduced the deep sleep latency by: 1. avoid outputing system informaton 2. remove flush cache after DDR restore 3. skip reloading second stage uboot binary when SD boot Signed-off