[PATCH v4 0/5] add devicetree for Forlinx FETA40i-C & OKA40i-C

[Ivan Uvarov]

This patch series adds devicetree support for the Forlinx FETA40i-C SoM
and OKA40i-C carrier board/devboard.

The FETA40i-C is an "industrial/automotive" SoM by Forlinx.

SoM specs:
- SoC: R40 or A40i
- PMIC: AXP221S
- RAM: 1GiB/2GiB DDR3 (dual-rank)
- eMMC: 8GB,
- Mates with carrier board via four 80-pin connectors (AXK6F80337YG).

OKA40i-C is a carrier board by the same manufacturer for this SoM,
whose main purpose is as a development board with a variety of
peripherals:

- Power: DC5V barrel or USB OTG or 4.2V Lipo battery
- Video out: HDMI, TV out, LVDS
- WiFi+Bluetooth: RL-UM02WBS-8723BU-V1.2 (802.11 b/g/n, BT V2.1/3.0/4.0)
- Ethernet: 10/100Mbps
- Storage: µSD, fullsize SD, eMMC (on SoM), SATA
- USB: 3 x USB2.0 Host (2 via hub, 1 native), 1 x USB2.0 OTG (micro-B)
- UART: RS232, RS485, 4 3.3v uarts (of which 2 have RTS/CTS)
- Other I/O: SPI x2, TWI, SDIO header, GPIO header, JTAG header
- Mini PCIe slot with sim holder for WLAN modem
- Smart card holder
- RTC (RX8010SJ)
- Two user LEDs
- Three user buttons (via KeyADC).

Of the board features listed above, support for the following has *NOT*
been tested:
- TV out & LVDS
- SATA
- Smart cards
- KeyADC buttons (no support)

The series consists of five patches, with dependencies as follows:

* Patch 4 depends on patch 3;
* Patch 5 depends on patches 2&4.

The rest are independent, however patch 2 may refuse to apply
without patch 1.

Signed-off-by: Ivan Uvarov <i.uvarov at cognitivepilot.com>
---

Changelog:

v4:
* split dt-bindings patch into separate parts for vendor and device
* add /omit-if-no-ref/ to the mmc3 pins node as well
* add clarifying comment on the naming of user led nodes

v3:
* add compatible string for the SoM
* move regulators aldo3, dcdc{2,3,5}, eldo{2,3} to the SoM .dtsi

v2:
* split patch into series
  * edits to sun8i-r40.dtsi are now in separate patch
* add dt bindings for compatible strings (in separate patch)
* add /omit-if-no-ref/ to the new uart pin nodes
  * preliminary patch adds the keyword to existing nodes for UART0 & UART3
* whitespace fixes as suggested by checkpatch.pl

(draft2 ->) v1: 
* fix indentation from spaces to tabs
* remove commented properties and other extraneous comments
* enable uarts 2,4,5&7 and alias uart3
* update the user-LED bindings
* remove mmc1 & add mmc3 binding
* bring together the max/min microvolts on three regulators
    * The reported 2.5v value in ALDO2 comes from U-Boot, where apparently
      this is the KConfig default for this regulator. The correct voltage
      is 1.8v.
* remove extraneous `always-on`s from regulators dldo1 and eldo2/3
* remove reg_dldo3 node entirely

---

Ivan Uvarov (5):
  ARM: dts: sun8i: r40: add /omit-if-no-ref/ to pinmux nodes for UARTs 0&3
  ARM: dts: sun8i: r40: add pinmux settings for MMC3 and UARTs 2,4,5&7
  dt-bindings: add compatible vendor prefix for Forlinx
  dt-bindings: arm: add compatible for Forlinx OKA40i-C and FETA40i-C
  ARM: dts: sun8i: r40: add devicetree for Forlinx FETA40i-C & OKA40i-C

 .../devicetree/bindings/arm/sunxi.yaml        |   6 +
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 arch/arm/boot/dts/Makefile                    |   1 +
 arch/arm/boot/dts/sun8i-r40-feta40i.dtsi      | 106 +++++++++
 arch/arm/boot/dts/sun8i-r40-oka40i-c.dts      | 203 ++++++++++++++++++
 arch/arm/boot/dts/sun8i-r40.dtsi              |  44 ++++
 6 files changed, 362 insertions(+)
 create mode 100644 arch/arm/boot/dts/sun8i-r40-feta40i.dtsi
 create mode 100644 arch/arm/boot/dts/sun8i-r40-oka40i-c.dts

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2.25.1