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

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Message-Id: <20221231233851.24923-12-samuel@sholland.org>
Date:   Sat, 31 Dec 2022 17:38:50 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        linux-sunxi@...ts.linux.dev
Cc:     devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Jisheng Zhang <jszhang@...nel.org>,
        linux-riscv@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        Andre Przywara <andre.przywara@....com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor@...nel.org>, linux-kernel@...r.kernel.org,
        Heiko Stuebner <heiko@...ech.de>,
        Samuel Holland <samuel@...lland.org>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Palmer Dabbelt <palmer@...osinc.com>,
        Guo Ren <guoren@...nel.org>
Subject: [PATCH v4 11/12] riscv: Add the Allwinner SoC family Kconfig option

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@...rochip.com>
Acked-by: Palmer Dabbelt <palmer@...osinc.com>
Reviewed-by: Guo Ren <guoren@...nel.org>
Reviewed-by: Heiko Stuebner <heiko@...ech.de>
Tested-by: Heiko Stuebner <heiko@...ech.de>
Signed-off-by: Samuel Holland <samuel@...lland.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
 	
-- 
2.37.4