Hi all,
Renesas R-Car H3 and M3-W are available as SoC (r8a779[56]) or SiP
(r8j779[56]). The latter is an integrated package
("System-in-Package"), containing an SoC, RAM, and HyperFlash.
This patch series adds DT bindings for the SiPs, breaks out hardware
descriptions for the SiPs into separate .dtsi files, and migrates the
board-specific DTSes from the SoC-specific to the SiP-specific .dtsi
files.
The motivations for this are:
- Provide a better description of the hardware hierarchy,
- Share more DTS fragments (not that visible due to boilerplate and
limited number of boards),
- Some quirks may be SiP-specific.
I believe this is the case for the limitation of RAVB Ethernet to
10/100 Mbps on H3 ES1.0.
Questions (reiterated in the individual patches):
- Do we need more compatible values, for different configurations?
At least r8j7796 is available with either 2 GiB or 4 GiB of RAM,
possibly using RAM parts from different vendors.
- How are the different SiP versions named officially?
- How should the .dtsi files be named?
- Should the board-specific files be renamed from <soc>-<board>.dts to
<sip>-<board>.dts?
Probably not, as this would inconvenience downstream developers even
more than the H3 ES1.x rename, and <soc> is not that incorrect.
DTB changes have been inspected using scripts/dtc/dtx_diff.
This has been tested on Salvator-X (both H3 and M3-W).
Thanks for your comments!
Geert Uytterhoeven (8):
[RFC] dt-bindings: renesas: Document R-Car H3 and M3-W SiP DT bindings
[RFC] arm64: dts: renesas: Add R-Car H3 SiP (4 x 1 GiB) support
[RFC] arm64: dts: renesas: Add R-Car M3-W SiP (2 x 1 GiB) support
[RFC] arm64: dts: renesas: Add R-Car M3-W SiP (2 x 2 GiB) support
[RFC] arm64: dts: renesas: Migrate R-Car H3 Salvator-X to
r8j7795-4x1g.dtsi
[RFC] arm64: dts: renesas: Migrate R-Car M3-W Salvator-X to
r8j7796-2x2g.dtsi
[RFC] arm64: dts: renesas: Migrate H3ULCB to r8j7795-4x1g.dtsi
[RFC] arm64: dts: renesas: Migrate M3ULCB to r8j7796-2x1g.dtsi
Documentation/devicetree/bindings/arm/shmobile.txt | 16 +++++++---
arch/arm64/boot/dts/renesas/r8a7795-h3ulcb.dts | 27 ++--------------
arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts | 27 ++--------------
arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts | 17 ++--------
arch/arm64/boot/dts/renesas/r8a7796-salvator-x.dts | 17 ++--------
arch/arm64/boot/dts/renesas/r8j7795-4x1g.dtsi | 36 ++++++++++++++++++++++
arch/arm64/boot/dts/renesas/r8j7796-2x1g.dtsi | 26 ++++++++++++++++
arch/arm64/boot/dts/renesas/r8j7796-2x2g.dtsi | 26 ++++++++++++++++
8 files changed, 112 insertions(+), 80 deletions(-)
create mode 100644 arch/arm64/boot/dts/renesas/r8j7795-4x1g.dtsi
create mode 100644 arch/arm64/boot/dts/renesas/r8j7796-2x1g.dtsi
create mode 100644 arch/arm64/boot/dts/renesas/r8j7796-2x2g.dtsi
--
2.7.4
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
