Re: [PATCH] mtd: spi-nor: add support for Microchip 25LC256
From: Radu Pirea
Date: Fri May 18 2018 - 08:05:44 EST
On 05/18/2018 01:03 PM, Marek Vasut wrote:
On 05/18/2018 11:50 AM, Radu Pirea wrote:
On 05/16/2018 04:47 PM, Marek Vasut wrote:
On 05/16/2018 12:05 PM, Radu Pirea wrote:
On Wed, 2018-05-16 at 00:17 +0200, Marek Vasut wrote:
On 05/15/2018 06:22 PM, Radu Pirea wrote:
On Fri, 2018-05-04 at 20:40 +0200, Boris Brezillon wrote:
On Fri, 4 May 2018 18:54:04 +0300
Radu Pirea <radu.pirea@xxxxxxxxxxxxx> wrote:
Added geometry description for Microchip 25LC256 memory.
Same as for the dataflash stuff you posted a few weeks ago: I
don't
think this device belongs in the SPI NOR framework.
Hi Boris,
25lc256 memory is similar with mr25h256, the only difference is the
page size(64 vs 256). Because mr25h256 is already in SPI NOR
framework
I added here 25lc256.
I think I must be reading the wrong datasheet, but can you show me
how
does it support things like READID opcode ?
Hi Marek,
I read the datasheet for 25lc256 and for mr25h256 and none of them
supports READID. Is this required for a chip to be included in spi-nor
framework? I just followed the mr25h256 as an example.
So I thought until you pointed out the MR25 devices.
Does the 25LC device need erase or not ? I think the MR25s didn't, but I
might be wrong.
You are right. MR25s does not need erase and the same thing is true for
25LC.
Oh. And the command set is (except for readid) comparable to SPI NOR ?
Maybe the framework could support the 25LC afterall.
Yes, this was my impression too.
I am still thinking that the AT25 driver might be a better fit for such
devices. Can you take a look ?
I tested the memory with at25 driver and it works with no line changed
in driver. :)