linux-kernel - Re: [RFC PATCH v2 10/11] riscv: soc: Add Allwinner SoC kconfig option

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Message-ID: <20210607071916.kwdbtafbqp3icgia@gilmour>
Date:   Mon, 7 Jun 2021 09:19:16 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     guoren@...nel.org
Cc:     anup.patel@....com, palmerdabbelt@...gle.com, arnd@...db.de,
        wens@...e.org, drew@...gleboard.org, liush@...winnertech.com,
        lazyparser@...il.com, wefu@...hat.com,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-sunxi@...ts.linux.dev,
        Guo Ren <guoren@...ux.alibaba.com>,
        Atish Patra <atish.patra@....com>,
        Christoph Hellwig <hch@....de>
Subject: Re: [RFC PATCH v2 10/11] riscv: soc: Add Allwinner SoC kconfig option

Hi,

On Sun, Jun 06, 2021 at 09:04:08AM +0000, guoren@...nel.org wrote:
> From: Guo Ren <guoren@...ux.alibaba.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: Guo Ren <guoren@...ux.alibaba.com>
> Co-Developed-by: Liu Shaohua <liush@...winnertech.com>
> Signed-off-by: Liu Shaohua <liush@...winnertech.com>
> Cc: Anup Patel <anup.patel@....com>
> Cc: Atish Patra <atish.patra@....com>
> Cc: Christoph Hellwig <hch@....de>
> Cc: Chen-Yu Tsai <wens@...e.org>
> Cc: Drew Fustini <drew@...gleboard.org>
> Cc: Maxime Ripard <maxime@...no.tech>
> Cc: Palmer Dabbelt <palmerdabbelt@...gle.com>
> Cc: Wei Fu <wefu@...hat.com>
> Cc: Wei Wu <lazyparser@...il.com>
> ---
>  arch/riscv/Kconfig.socs      | 12 ++++++++++++
>  arch/riscv/configs/defconfig |  1 +
>  2 files changed, 13 insertions(+)
> 
> diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
> index ed96376..055fb3e 100644
> --- a/arch/riscv/Kconfig.socs
> +++ b/arch/riscv/Kconfig.socs
> @@ -69,4 +69,16 @@ config SOC_CANAAN_K210_DTB_SOURCE
>  
>  endif
>  
> +config SOC_SUNXI
> +	bool "Allwinner SoCs"
> +	depends on MMU
> +	select DWMAC_GENERIC
> +	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.
> +

We probably don't want to select DWMAC, STMMAC_ETH and the 8250 options,
looks good otherwise.

Maxime

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