On Mon, Jan 21, 2019 at 12:26 PM sjg@google.com wrote:
On Wed, 16 Jan 2019 at 12:40, Simon Goldschmidt simon.k.r.goldschmidt@gmail.com wrote:
Improve some things in the documentation of OF_PLATDATA that I found while porting socfgpa_gen5 to it.
Thanks for doing that. I actually learned a bit. :-)
This may be more directed at Simon, but it seems like many platforms are limited in SPL and OF_PLATDATA might be a great feature to get more drivers supporting device tree booting without as much overhead.
From how the documentation reads, it seems like the drivers may not
necessarily support OF_PLATDATA by default. I've been struggling trying to enable basic functions (like serial via 16550 driver) because the platform data generated doesn't necessarily match the platform data I use to start the serial device. I would like to migrate from using manually entered platform data to using OF_PLATDATA to reduce the overhead.
A few things I noticed are that the generated device names correspond to the names listed in the 'compatible' flag and there doesn't seem to be a good way to link them to the actual driver name.
I see a few drivers that check for OF_PLATDATA, but I am not seeing many people actually utilize this feature. Any suggestions on how to one might migrate a driver (like serial) which already supports OF_CONTROL in u-boot, but the generated platdata doesn't boot in SPL?
adam
Signed-off-by: Simon Goldschmidt simon.k.r.goldschmidt@gmail.com
Changes in v2:
- further fixes noted by Simon Glass
- added info about missing node relations
- moved the passage about phandles into section 'caveats'
doc/driver-model/of-plat.txt | 31 ++++++++++++++++++++----------- dts/Kconfig | 6 ++---- 2 files changed, 22 insertions(+), 15 deletions(-)
Reviewed-by: Simon Glass sjg@chromium.org
Applied to u-boot-dm, thanks! _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot