[PATCH 05/12] riscv: Add the Allwinner SoC family Kconfig option

[Samuel Holland <samuel@sholland.org>]

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.

Signed-off-by: Samuel Holland <samuel@sholland.org>
---

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

diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index 69774bb362d6..1caacbfac1a5 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -1,5 +1,14 @@
 menu "SoC selection"
 
+config ARCH_SUNXI
+	bool "Allwinner sun20i SoCs"
+	select ERRATA_THEAD if MMU && !XIP_KERNEL
+	select SIFIVE_PLIC
+	select SUN4I_TIMER
+	help
+	  This enables support for Allwinner sun20i platform hardware,
+	  including boards based on the D1 and D1s SoCs.
+
 config SOC_MICROCHIP_POLARFIRE
 	bool "Microchip PolarFire SoCs"
 	select MCHP_CLK_MPFS
-- 
2.35.1