[PATCH v2] mtd: m25p80: add support for PMC SPI flash
Michel Stempin
michel.stempin at wanadoo.fr
Fri Aug 30 17:11:03 EDT 2013
Le 30/08/2013 22:50, David Woodhouse a écrit :
> On Wed, 2013-08-21 at 12:03 +0200, Luka Perkov wrote:
>>
>> On Wed, Aug 21, 2013 at 02:12:42AM -0700, Brian Norris wrote:
>>> I just noticed this version of Michel's patch (it was filtered to my
>>> spam for some reason). I pushed Michel's version,
>>
>> Ok, I have only changed commit message.
>
> And I'm going to change it a little more to make it make sense, I think.
> Can someone confirm the accuracy of the following (fixing non-standard
> terms, and also I think fixing the comment about Pm25LQ032 block size):
I can't get used to these IEC prefixes vs. the customary ones, but you are right,
this is the international standard.
>
> -commit ac36246d7c8684128c5879219c3178838983fbd0
> +commit ab50c34679ca03929fbc313da378b4f934e706ea
> Author: Michel Stempin <michel.stempin at wanadoo.fr>
> Date: Mon Jul 15 12:13:56 2013 +0200
>
> mtd: chips: Add support for PMC SPI Flash chips in m25p80.c
>
> - Add support for PMC (now Chingis, part of ISSI) Pm25LV512 (512 kBbit),
> - Pm25LV010 (1 Mbit) and Pm25LQ032 (32 Mbit) SPI Flash chips.
> + Add support for PMC (now Chingis, part of ISSI) Pm25LV512 (512 Kib),
> + Pm25LV010 (1 Mib) and Pm25LQ032 (32 Mib) SPI Flash chips.
>
> This patch addresses two generations of PMC SPI Flash chips:
>
> - - Pm25LV512 and Pm25LV010: these have 4KB sectors and 32KB
> - blocks. The 4KB sector erase uses a non-standard opcode
> + - Pm25LV512 and Pm25LV010: these have 4KiB sectors and 32KiB
> + blocks. The 4KiB sector erase uses a non-standard opcode
> (0xd7). They do not support JEDEC RDID (0x9f), and so they can only
> be detected by matching their name string with pre-configured
> platform data. Because of the cascaded acquisitions, the datasheet
> @@ -20,7 +20,7 @@ Date: Mon Jul 15 12:13:56 2013 +0200
> only public datasheet available seems to be on GeoCities:
> <http://www.geocities.jp/scottle556/pdf/Pm25LV512-010.pdf>
>
> - - Pm25LQ032: a newer generation flash, with 4KB sectors and 32KB
> + - Pm25LQ032: a newer generation flash, with 4KiB sectors and 64KiB
Yes, this is a 64KiB block size indeed.
> blocks. It uses the standard erase and JEDEC read-ID
> opcodes. Manufacturer's datasheet is here:
> <http://www.chingistek.com/img/Product_Files/Pm25LQ032C%20datasheet%20v1.6.1.pdf>
> @@ -46,6 +46,7 @@ Date: Mon Jul 15 12:13:56 2013 +0200
> Signed-off-by: Michel Stempin <michel.stempin at wanadoo.fr>
> [Brian: fixed conflict]
> Signed-off-by: Brian Norris <computersforpeace at gmail.com>
> + Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
>
>
>
>
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
>
-- Michel
More information about the linux-mtd
mailing list