[PATCH net-next v6 0/2] Add the dwmac driver support for T-HEAD TH1520 SoC

[Drew Fustini]

This series adds support for dwmac gigabit ethernet in the T-Head TH1520
RISC-V SoC used on boards like BeagleV Ahead and the LicheePi 4A.

The gigabit ethernet on these boards does need pinctrl support to mux
the necessary pads. The pinctrl-th1520 driver, pinctrl binding, and
related dts patches are in linux-next. However, they are not yet in
net-next/main.

Therefore, I am dropping the dts patch for v5 as it will not build on
net-next/main due to the lack of the padctrl0_apsys pin controller node
in next-next/main version th1520.dtsi. It does exist in linux-next [1]
and the two patches in this series allow the ethernet ports to work
correctly on the LPi4A and Ahead when applied to linux-next.

The dwmac-thead driver in this series does not need the pinctrl-th1520
driver to build. Nor does the thead,th1520-gmac.yaml binding need the
pinctrl binding to pass the schema check.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/riscv/boot/dts/thead/th1520.dtsi

Changes in v6:
 - Remove unnecessary semicolon from end of switch() blocks
 - Add Rb from Andrew Lunn on both patches
 - Link to v5: https://lore.kernel.org/r/20241025-th1520-gmac-v5-0-38d0a48406ff@tenstorrent.com

Changes in v5:
 - Rebase on net-next/main
 - Drop the dts patch from this series. It applies to linux-next but
   not net-next/main.
 - Remove repeated properties from required: in binding
 - Add Rb from Krzysztof for binding
 - Link to v4: https://lore.kernel.org/r/20241020-th1520-dwmac-v4-0-c77acd33ccef@tenstorrent.com

Changes in v4:
 - Rebase on next for pinctrl dependency
 - Add 'net-next' prefix to subject per maintainer-netdev.rst
 - Add clocks, clock-names, interrupts and interrupt-names to binding
 - Simplify driver code by switching from regmap to regualar mmio

Changes in v3:
 - Rebase on v6.12-rc1
 - Remove thead,rx-internal-delay and thead,tx-internal-delay properties
 - Remove unneeded call to thead_dwmac_fix_speed() during probe
 - Fix filename for the yaml file in MAINTAINERS patch
 - Link: https://lore.kernel.org/linux-riscv/20240930-th1520-dwmac-v3-0-ae3e03c225ab@tenstorrent.com/

Changes in v2:
 - Drop the first patch as it is no longer needed due to upstream commit
   d01e0e98de31 ("dt-bindings: net: dwmac: Validate PBL for all IP-cores")
 - Rename compatible from "thead,th1520-dwmac" to "thead,th1520-gmac"
 - Add thead,rx-internal-delay and thead,tx-internal-delay properties
   and check that it does not exceed the maximum value
 - Convert from stmmac_dvr_probe() to devm_stmmac_pltfr_probe() and
   delete the .remove_new hook as it is no longer needed
 - Handle return value of regmap_write() in case it fails
 - Add phy reset delay properties to the BeagleV Ahead device tree
 - Link: https://lore.kernel.org/linux-riscv/20240926-th1520-dwmac-v2-0-f34f28ad1dc9@tenstorrent.com/

Changes in v1:
 - remove thead,gmacapb that references syscon for APB registers
 - add a second memory region to gmac nodes for the APB registers
 - Link: https://lore.kernel.org/all/20240713-thead-dwmac-v1-0-81f04480cd31@tenstorrent.com/

---
Jisheng Zhang (2):
      dt-bindings: net: Add T-HEAD dwmac support
      net: stmmac: Add glue layer for T-HEAD TH1520 SoC

 .../devicetree/bindings/net/snps,dwmac.yaml        |   1 +
 .../devicetree/bindings/net/thead,th1520-gmac.yaml | 110 +++++++++
 MAINTAINERS                                        |   2 +
 drivers/net/ethernet/stmicro/stmmac/Kconfig        |  10 +
 drivers/net/ethernet/stmicro/stmmac/Makefile       |   1 +
 drivers/net/ethernet/stmicro/stmmac/dwmac-thead.c  | 268 +++++++++++++++++++++
 6 files changed, 392 insertions(+)
---
base-commit: 03fc07a24735e0be8646563913abf5f5cb71ad19
change-id: 20241025-th1520-gmac-78a76aa90c62

Best regards,
-- 
Drew Fustini <dfustini at tenstorrent.com>