On 3/8/23 21:26, Ralph Siemsen wrote:
This is taken from Linux kernel 5.17, and contains just bare minimum
functionality: CPU, UART and system timer.
Why Linux 5.17 and not e.g. 6.2 or 6.1 LTS ?
Additional functionality (from newer kernel versions) will be added
later. Note that the Linux side is under active development.
Signed-off-by: Ralph Siemsen <ralph.siem...@linaro.org>
---
The following changes were made, compared with Linux 5.17:
1) Add node for system controller registers.
Declare it as syscon to provide a regmap interface.
2) In the clock controller node (renesas,r9a06g032-sysctrl),
replace regs with regmap.
3) Add syscon-reset node, making use of the syscon regmap.
4) Add syscon phandle to ddrctrl. Used for checking h/w version.
5) Simplify the compatible string for all the UARTS, as per
doc/device-tree-bindings/serial/snps-dw-apb-uart.txt
I could not find a way to avoid 1) and 2). Putting "syscon" in the
compatible string for the clock controller leads to a catch-22,
where the driver fails to initialize, and then boot hangs.
Can you extract all the changes to arch/arm/dts/r9a06g032-u-boot.dtsi
and include that u-boot dtsi in your board DT, so the
arch/arm/dts/r9a06g032.dtsi can be synchronized with Linux with ease due
to no changes in it ?
