[PATCH 00/19] arm: airoha: add support for en7523 based boards

[Mikhail Kshevetskiy]

This patch series adds basic support for the boards based on Airoha
EN7523/EN7529/EN7562 SoCs. Due to ATF restrictions these boards are
able to run 32-bit OS only.

This patch series adds support for the following hardware:
 * console UART
 * ethernet controller/switch
 * spinand flash (in non-dma mode)

The following issues may be expected:
 * Extra slow UBI attaching in U-Boot (up to 20 sec with fastmap enabled).
   This is caused by the lack of DMA support in the U-Boot airoha-snfi driver.
 * Linux airoha-snfi driver in some cases might damage you flash data
   (see: https://lore.kernel.org/lkml/20251012121707.2296160-15-mikhail.kshevetskiy@iopsys.eu/)
 * Latest linux kernel is recommended to properly support flashes
   with more than one plane per lun
   (see: https://lore.kernel.org/lkml/20251012121707.2296160-7-mikhail.kshevetskiy@iopsys.eu/)
 * It's NOT recommended to use flashes working in continuous mode because
   U-Boot airoha-snfi driver does not support such flashes properly.

The patches was tested on the board:
 - SoC: Airoha EN7562
 - RAM: 512 MB
 - SPI NAND: 4 Gbit, made by Toshiba
 - Linux boot: was NOT tested

The U-Boot was chain-loaded from the running U-Boot. Airoha ATF-2.3 does
not allow easily chain-loading of U-Boot from U-Boot, so a special FIT
image (mimic linux kernel) was created

1) Create u-boot.its file with the following contents:

=== cut here ===
/dts-v1/;

/ {
	description = "ARM OpenWrt FIT (Flattened Image Tree)";
	#address-cells = <1>;

	images {
		u-boot-ram {
			description = "OpenWrt U-Boot RAM image";
			data = /incbin/("u-boot.bin.lzma");
			type = "kernel";
			arch = "arm";
			os = "linux";
			compression = "lzma";
			load = <0x81e00000>;
			entry = <0x81e00000>;
			hash at 1 {
				algo = "crc32";
			};
			hash at 2 {
				algo = "sha1";
			};
		};

		fdt-1 {
			description = "OpenWrt device tree blob";
			
			data = /incbin/("dts/upstream/src/arm/airoha/en7523-evb.dtb");
			type = "flat_dt";

			arch = "arm";
			compression = "none";
			hash at 1 {
				algo = "crc32";
			};
			hash at 2 {
				algo = "sha1";
			};
		};
	};

	configurations {
		default = "config-ram-uboot";
		config-ram-uboot {
			description = "OpenWrt RAM U-Boot";
			kernel = "u-boot-ram";
			fdt = "fdt-1";
		};
	};
};
==================

2) Create u-boot.itb image to chain-load new u-boot from the old one

  lzma_alone e u-boot.bin u-boot.bin.lzma
  mkimage -f u-boot.its u-boot.itb

3) Load new u-boot from the old one

  U-Boot> tftpboot u-boot.itb && bootm


Christian Marangi (1):
  reset: airoha: convert to regmap API

Mikhail Kshevetskiy (18):
  airoha/an7581: add CONFIG_TARGET_AN7581=y to the defconfig
  arm/airoha: add support for airoha en7523 SoC family
  arm: airoha: introduce AN7581 helpers to get SCU and CHIP_SCU regmaps
  arm: airoha: introduce EN7523 helpers to get SCU and CHIP_SCU regmaps
  clk: airoha: use CHIP_SCU regmap helper
  clk: airoha: add support for airoha en7523 SoC family
  configs: airoha: en7523: enable clk support
  reset: airoha: unify code using SCU regmap helper
  dt-bindings: reset: Add reset support for Airoha EN7523
  reset: airoha: add support for airoha en7523 SoC family
  dts: airoha: en7523: add reset controller support
  configs: airoha: en7523: enable reset controller support
  net: airoha: unify code using SCU regmap helper
  net: airoha: add support for airoha en7523 SoC family
  dts: airoha: en7523: add ethernet controller support
  configs: airoha: en7523: enable ethernet controller support
  dts: airoha: en7523: add spinand flash support
  configs: airoha: en7523: enable spinand flashes support

 arch/arm/dts/en7523-evb-u-boot.dtsi           |  11 ++
 arch/arm/dts/en7523-u-boot.dtsi               |  70 ++++++++++
 arch/arm/include/asm/arch-airoha/scu-regmap.h |  13 ++
 arch/arm/include/asm/arch-an7581              |   1 +
 arch/arm/include/asm/arch-en7523              |   1 +
 arch/arm/mach-airoha/Kconfig                  |  14 ++
 arch/arm/mach-airoha/Makefile                 |   1 +
 arch/arm/mach-airoha/an7581/Makefile          |   1 +
 arch/arm/mach-airoha/an7581/scu-regmap.c      |  30 +++++
 arch/arm/mach-airoha/en7523/Makefile          |   4 +
 arch/arm/mach-airoha/en7523/init.c            |  33 +++++
 arch/arm/mach-airoha/en7523/scu-regmap.c      |  38 ++++++
 board/airoha/en7523/Makefile                  |   3 +
 board/airoha/en7523/en7523_rfb.c              |  16 +++
 configs/an7581_evb_defconfig                  |   1 +
 configs/en7523_evb_defconfig                  |  67 +++++++++
 drivers/clk/airoha/clk-airoha.c               | 127 ++++++++++++++++--
 drivers/net/airoha_eth.c                      |  78 +++++++----
 drivers/reset/reset-airoha.c                  | 106 ++++++++++++---
 include/configs/en7523.h                      |  21 +++
 .../dt-bindings/reset/airoha,en7523-reset.h   |  61 +++++++++
 21 files changed, 642 insertions(+), 55 deletions(-)
 create mode 100644 arch/arm/dts/en7523-evb-u-boot.dtsi
 create mode 100644 arch/arm/dts/en7523-u-boot.dtsi
 create mode 100644 arch/arm/include/asm/arch-airoha/scu-regmap.h
 create mode 120000 arch/arm/include/asm/arch-an7581
 create mode 120000 arch/arm/include/asm/arch-en7523
 create mode 100644 arch/arm/mach-airoha/an7581/scu-regmap.c
 create mode 100644 arch/arm/mach-airoha/en7523/Makefile
 create mode 100644 arch/arm/mach-airoha/en7523/init.c
 create mode 100644 arch/arm/mach-airoha/en7523/scu-regmap.c
 create mode 100644 board/airoha/en7523/Makefile
 create mode 100644 board/airoha/en7523/en7523_rfb.c
 create mode 100644 configs/en7523_evb_defconfig
 create mode 100644 include/configs/en7523.h
 create mode 100644 include/dt-bindings/reset/airoha,en7523-reset.h

-- 
2.51.0