[PATCH v4 11/12] riscv: Add the Allwinner SoC family Kconfig option

Samuel Holland
2022-12-31T23:58:23Z

Allwinner manufactures the sunxi family of application processors. This
includes the "sun8i" series of ARMv7 SoCs, the "sun50i" series of ARMv8
SoCs, and now the "sun20i" series of 64-bit RISC-V SoCs.

The first SoC in the sun20i series is D1, containing a single T-HEAD
C906 core. D1s is a low-pin-count variant of D1 with co-packaged DRAM.

Most peripherals are shared across the entire chip family. In fact, the
ARMv7 T113 SoC is pin-compatible and almost entirely register-compatible
with the D1s.

This means many existing device drivers can be reused. To facilitate
this reuse, name the symbol ARCH_SUNXI, since that is what the existing
drivers have as their dependency.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Samuel Holland <samuel@sholland.org>
---

Changes in v4:
- Drop the now-redundant 'select SIFIVE_PLIC'
- Rebase on v6.2-rc1 + soc2arch-immutable

Changes in v3:
- ARCH_SUNXI depends on MMU && !XIP_KERNEL

Changes in v2:
- Sort Kconfig as if we had done s/SOC_/ARCH_/ for future-proofing

arch/riscv/Kconfig.socs | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index 34a54e5310a1..4b91367604ea 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -32,6 +32,15 @@ config SOC_STARFIVE
help
This enables support for StarFive SoC platform hardware.

+config ARCH_SUNXI
+ bool "Allwinner sun20i SoCs"
+ depends on MMU && !XIP_KERNEL
+ select ERRATA_THEAD
+ select SUN4I_TIMER
+ help
+ This enables support for Allwinner sun20i platform hardware,
+ including boards based on the D1 and D1s SoCs.
+
config ARCH_VIRT
def_bool SOC_VIRT