[RFC] soc: renesas: Identify SoC and register with the SoC bus
Identify the SoC type and revision, and register this information with
the SoC bus, so it is available under /sys/devices/soc0/, and can be
checked where needed using soc_device_match().
In addition, on SoCs that support it, the product ID is read from a
hardware register and validated, to catch accidental use of a DTB for a
different SoC.
Example:
Detected Renesas r8a7791 ES1.0
...
# cat /sys/devices/soc0/{family,machine,soc_id,revision}
R-Car Gen2
Koelsch
r8a7791
ES1.0
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
This patch does NOT add a call to
of_platform_default_populate(NULL, NULL,
soc_device_to_device(soc_dev));
Contrary to suggested by commit 74d1d82cdaaec727 ("drivers/base: add bus
for System-on-Chip devices), doing so would not only move on-SoC devices
from /sys/devices/platform/ to /sys/devices/soc0/, but also all other
board (off-SoC) devices specified in the DTB.
4 files changed
