[RFC PATCH V4 6/6] riscv: soc: Add Allwinner SoC kconfig option
Maxime Ripard
maxime at cerno.tech
Mon Sep 13 01:45:20 PDT 2021
Hi,
On Sat, Sep 11, 2021 at 05:21:39PM +0800, guoren at kernel.org wrote:
> From: Liu Shaohua <liush at allwinnertech.com>
>
> Add Allwinner kconfig option which selects SoC specific and common
> drivers that is required for this SoC.
>
> Allwinner D1 uses custom PTE attributes to solve non-coherency SOC
> interconnect issues for dma synchronization, so we set the default
> value when SOC_SUNXI selected.
>
> Signed-off-by: Liu Shaohua <liush at allwinnertech.com>
> Signed-off-by: Guo Ren <guoren at linux.alibaba.com>
> Signed-off-by: Wei Fu <wefu at redhat.com>
> Cc: Anup Patel <anup.patel at wdc.com>
> Cc: Atish Patra <atish.patra at wdc.com>
> Cc: Christoph Hellwig <hch at lst.de>
> Cc: Chen-Yu Tsai <wens at csie.org>
> Cc: Drew Fustini <drew at beagleboard.org>
> Cc: Maxime Ripard <maxime at cerno.tech>
> Cc: Palmer Dabbelt <palmerdabbelt at google.com>
> Cc: Wei Wu <lazyparser at gmail.com>
> ---
> arch/riscv/Kconfig.socs | 15 +++++++++++++++
> arch/riscv/configs/defconfig | 1 +
> 2 files changed, 16 insertions(+)
>
> diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
> index 30676ebb16eb..8721c000ef23 100644
> --- a/arch/riscv/Kconfig.socs
> +++ b/arch/riscv/Kconfig.socs
> @@ -70,4 +70,19 @@ config SOC_CANAAN_K210_DTB_SOURCE
>
> endif
>
> +config SOC_SUNXI
> + bool "Allwinner SoCs"
> + depends on MMU
> + select DWMAC_GENERIC
> + select ERRATA_THEAD
> + select RISCV_DMA_NONCOHERENT
> + select RISCV_ERRATA_ALTERNATIVE
> + select SERIAL_8250
> + select SERIAL_8250_CONSOLE
> + select SERIAL_8250_DW
> + select SIFIVE_PLIC
> + select STMMAC_ETH
> + help
> + This enables support for Allwinner SoC platforms like the D1.
> +
I'm not sure we should select the drivers there. We could very well
imagine a board without UART, or even more so without ethernet.
These options should be in the defconfig.
Maxime
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