[U-Boot] sf: About sandbox flash driver
Hi Simon,
Few question wrt sandbox flash driver - drivers/mtd/spi/sandbox.c
1) Does this driver used for creating flash emulation environment? or something else? 2) Can't it use spi_flash.c core for all spi flash operations, how different is this?
Please let me know your inputs.
thanks!
Hi Jagan,
On 30 December 2015 at 10:03, Jagan Teki jteki@openedev.com wrote:
Hi Simon,
Few question wrt sandbox flash driver - drivers/mtd/spi/sandbox.c
- Does this driver used for creating flash emulation environment? or
something else?
It is an emulation driver, meant to emulate a SPI flash device. See sandbox_sf_emul_ops - the sandbox_sf_xfer() receives a SPI message from U-Boot and produces a reply.
- Can't it use spi_flash.c core for all spi flash operations, how
different is this?
That is for talking to SPI flash devices I think, rather than emulating one.
Please let me know your inputs.
thanks!
Jagan.
Regards, Simon
Hi Simon,
On 8 January 2016 at 01:19, Simon Glass sjg@chromium.org wrote:
Hi Jagan,
On 30 December 2015 at 10:03, Jagan Teki jteki@openedev.com wrote:
Hi Simon,
Few question wrt sandbox flash driver - drivers/mtd/spi/sandbox.c
- Does this driver used for creating flash emulation environment? or
something else?
It is an emulation driver, meant to emulate a SPI flash device. See sandbox_sf_emul_ops - the sandbox_sf_xfer() receives a SPI message from U-Boot and produces a reply.
- Can't it use spi_flash.c core for all spi flash operations, how
different is this?
That is for talking to SPI flash devices I think, rather than emulating one.
Yes, that I understood. is it possible to modify this to use spi_flash core? Because we need to maintain the spi_flash_params separately for this, see my last series for reference[1] I have moved flash_prams inside spi_flash core and old ones to sandbox
[1] http://comments.gmane.org/gmane.comp.boot-loaders.u-boot/246568
thanks!
Hi Jagan,
On 8 January 2016 at 03:47, Jagan Teki jteki@openedev.com wrote:
Hi Simon,
On 8 January 2016 at 01:19, Simon Glass sjg@chromium.org wrote:
Hi Jagan,
On 30 December 2015 at 10:03, Jagan Teki jteki@openedev.com wrote:
Hi Simon,
Few question wrt sandbox flash driver - drivers/mtd/spi/sandbox.c
- Does this driver used for creating flash emulation environment? or
something else?
It is an emulation driver, meant to emulate a SPI flash device. See sandbox_sf_emul_ops - the sandbox_sf_xfer() receives a SPI message from U-Boot and produces a reply.
- Can't it use spi_flash.c core for all spi flash operations, how
different is this?
That is for talking to SPI flash devices I think, rather than emulating one.
Yes, that I understood. is it possible to modify this to use spi_flash core? Because we need to maintain the spi_flash_params separately for this, see my last series for reference[1] I have moved flash_prams inside spi_flash core and old ones to sandbox
I'm sure it could be changed. At present it uses spi_flash_params_table but it could be changed to use a different table.
[1] http://comments.gmane.org/gmane.comp.boot-loaders.u-boot/246568
thanks!
Jagan.
Regards, Simon
participants (2)
-
Jagan Teki -
Simon Glass