+Hans
Hi Tom,
On 21 January 2016 at 05:24, Tom Rini trini@konsulko.com wrote:
On Wed, Jan 20, 2016 at 07:46:15PM -0700, Simon Glass wrote:
+Mugunthan, Tom
On 17 January 2016 at 03:56, Christophe Ricard christophe.ricard@gmail.com wrote:
Convert omap3_spi driver to DM and keep compatibility with previous mode.
Signed-off-by: Christophe Ricard christophe-h.ricard@st.com
drivers/spi/Kconfig | 6 + drivers/spi/omap3_spi.c | 439 ++++++++++++++++++++++++++++++++++++++++++------ drivers/spi/omap3_spi.h | 14 +- 3 files changed, 402 insertions(+), 57 deletions(-)
This is a pretty painful conversion, with lots of #ifdefs. I think it would be possible to use a common pointer type and reduce this.
But perhaps it does not matter - how long must we be in the state of supporting legacy SPI? Can we convert all TI boards to driver model?
We _really_ need some way to support more than one board per binary before we can move everything to DM only.
I think we can kind of do this today if we stick to using platform data for everything that's board-specific rather than SoC-defined. What we talked about at ELCE was auto-generating the pdata from the device tree, I think.
We discussed this on IRC but since that doesn't exist as far as the mailing list is concerned...
The current plan is:
- Adjust build system to optionally build a u-boot.img in FIT format that includes the U-Boot binary and >1 device tree files - Adjust SPL to load this - Add a way for SPL to determine which device tree to select (by calling a board-specific function) - Have SPL pass this selected device tree to U-Boot when it starts
Thus we should be able to support more than one board with a single U-Boot image. Of course this is not a perfect solution (e.g. it is inefficient since the DTs are likely to be largely the same) but it should be a good first step.
I'm going to try this out with sunxi initially and plan to get some patches out by the end of the week.
Regards, Simon