On 11/07/2016 10:03 PM, Yao Yuan wrote:
On 11/08/2016 02:27 AM, York Sun wrote:
On 10/25/2016 07:10 PM, Yuan Yao wrote:
From: Yuan Yao yao.yuan@nxp.com
The default configuration for QSPI AHB bus can't support 16MB+. But some flash on NXP layerscape board are more than 16MB.
So what do you do?
Is this an erratum workaround? If yes, please refer the erratum number.
Hi York,
I think It's not an erratum maybe it's better to call it new feature.
As a default configuration for QSPI AHB, the address size is 3-bytes. It has a good compatibility for QSPI boot for different SPI-NOR flash.
But if the address size is only 3-bytes, the QSPI can't access to the data that more than 16M+.
So we can update the default configuration for QSPI AHB in uboot to use 4-bytes address. So that QSPI can access to 16M+ size by AHB bus.
I cannot figure this out from the change you proposed, or from the commit message. Maybe adding some comments next to the code? Those magic numbers are better explained.
York