Am Montag, 15. August 2022, 18:56:23 CEST schrieb Conor.Dooley@microchip.com:

On 15/08/2022 06:08, Samuel Holland wrote:

quoted

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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.

Hey Samuel,
I think this and patch 12/12 with the defconfig changes should be
deferred until post LPC (which still leaves plenty of time for
making the 6.1 merge window). We already have like 4 different
approaches between the existing SOC_FOO symbols & two more when
D1 stuff and the Renesas stuff is considered.

On the other hand, I don't really think it's that hard to change things
after the fact? I.e. ARCH_SUNXI is pretty much set in stone anyway,
so there isn't very much that _could_ change without affecting most
driver subsystems in the kernel.

So I don't think we'd actually need to wait with the Allwinner symbol.


Heiko

Plan is to decide at LPC on one approach for what to do with
Kconfig.socs & to me it seems like a good idea to do what's being
done here - it's likely that further arm vendors will move and
keeping the common symbols makes a lot of sense to me...

Thanks,
Conor.

quoted

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

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