[U-Boot-Users] Flash driver : help req
Hi,
Our MPC8260 based customs board's flash configuration is as follows
Flash Bank Base Address Make Number of flashes per chip size Total size
CS0 0xFE000000 M29W040B 2 0.5MB 1MB CS1 0xFE800000 AM29LV160BB 2 2MB 4MB
My question is
1. Is is mandatory that CS0 and CS1 to be contiguous? 2. what should be the value of CFG_MAX_FLASH_BANKS? 2 or 4? 3. If for a board, CS0 has "n1" number of flash chips connected and CS1 has "n2" number of flash chips connected, then what will be the suggested structure of flash driver? I found that flash drivers for different board does not consider the number of physical flash chips present in a board. 4.Is there any reference board which has multiple flash chips connected both to CS0 and CS1?
Thanks, Batsayan Das
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In message OF73B6F0F7.55C9B77F-ON652570F9.00433D81-652570F9.00456AEB@tcs.com you wrote:
Our MPC8260 based customs board's flash configuration is as follows
Flash Bank Base Address Make Number of flashes per chip size Total size
CS0 0xFE000000 M29W040B 2 0.5MB 1MB CS1 0xFE800000 AM29LV160BB 2 2MB 4MB
- Is is mandatory that CS0 and CS1 to be contiguous?
No.
- what should be the value of CFG_MAX_FLASH_BANKS? 2 or 4?
2
- If for a board, CS0 has "n1" number of flash chips connected and CS1
has "n2" number of flash chips connected, then what will be the suggested structure of flash driver? I found that flash drivers for different board
See existing code examples.
does not consider the number of physical flash chips present in a board.
Some do (those which need to), some don't (those which doen't need).
4.Is there any reference board which has multiple flash chips connected both to CS0 and CS1?
Yes, several.
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I promise that this is the last time that I violate your company's information policy by not "immediately and permanently delet"ing your message.
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Wolfgang Denk
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batsayan.das＠tcs.com -
Wolfgang Denk