[U-Boot] [PATCH v5 1/4] dm: sf: Add Atmel DataFlash spi flash driver

[Chakra D]

On Tue, May 19, 2015 at 8:26 AM, Wang Haikun <Haikun.Wang at freescale.com>
wrote:

> On 5/18/2015 9:28 PM, Haikun Wang wrote:
> > Atmel DataFlash chips have commands different from common spi
> > flash commands.
> > Atmel DataFlash also have special page-size.
> > This driver add support for accessing Atmel DataFlash.
> > It is based on the Driver Model.
> > Example:
> > => sf probe 1:0
> > SPI DataFlash: Detected AT45DB021B with page size 264 Bytes, erase size
> 264 Bytes, total 264 KiB, revision d
> > => sf erase 0 42000
> > SF: 270336 bytes @ 0x0 Erased: OK
> > => mw.l 82000000 45444342 20000
> > => sf write 82000000 0 42000
> > SF: 270336 bytes @ 0x0 Written: OK
> > => sf read 83000000 0 42000
> > SF: 270336 bytes @ 0x0 Read: OK
> > => cmp.b 82000000 83000000 42000
> > Total of 270336 byte(s) were the same
> >
> > Signed-off-by: Haikun Wang <haikun.wang at freescale.com>
> > ---
> > Verified with AT45DB021B on LS1021AQDS.
> > Changes in v5:
> > - Change CONFIG_DM_SF_DATAFLASH to CONFIG_SF_DATAFLASH
> >
> > Changes in v4:
> > - Use dev_get_priv and dev_get_uclass_priv
> > - Add test log to commit message
> >
> > Changes in v3:
> > - 1. Rename file spi_dataflash.c to sf_dataflash.c
> > - 2. Add comment for array "dataflash_data"
> >
> > Changes in v2:
> > - 1. Correct comment style
> > - 2. Use get_timer in dataflash_waitready to check whether timeout
> > - 3. Remove struct spi_flash * in struct dataflash, and get it from
> udevice->uclass_priv
> > - 4. Replace spi_flash_write_common with spi_flash_cmd_write
> > - 5. Replace spi_flash_read with spi_flash_cmd_read
> > - 6. Change type of varible "status" form char to u8 in dataflash_status
> > - 7. Change add_dataflash's argument type due to <change 3>
> > - 8. Add claim_bus and release_bus in erase/write/read due to <change 4
> & 5>
> >
> > Changes in v1: None
> >   drivers/mtd/spi/Makefile       |   1 +
> >   drivers/mtd/spi/sf_dataflash.c | 711
> +++++++++++++++++++++++++++++++++++++++++
> >   2 files changed, 712 insertions(+)
> >   create mode 100644 drivers/mtd/spi/sf_dataflash.c
>


 Reviewed by: Chakra Divi <cdivi at openedev.com>

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