linux-kernel - Re: [PATCH v4 06/12] remoteproc: mediatek: Extract remoteproc initialization flow

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Date:   Thu, 9 Feb 2023 13:43:07 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Tinghan Shen <tinghan.shen@...iatek.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v4 06/12] remoteproc: mediatek: Extract remoteproc
 initialization flow

Il 09/02/23 08:40, Tinghan Shen ha scritto:
> This is the preparation for probing multi-core SCP. The remoteproc
> initialization flow is similar on cores and is reuesd to avoid
> redundant code.
> 
> The registers of config and l1tcm are shared for multi-core
> SCP. Reuse the mapped addresses for all cores.
> 
> Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
> ---
>   drivers/remoteproc/mtk_common.h |  7 +++++
>   drivers/remoteproc/mtk_scp.c    | 55 +++++++++++++++++++++------------
>   2 files changed, 42 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
> index 3778894c96f3..20c1a90be77d 100644
> --- a/drivers/remoteproc/mtk_common.h
> +++ b/drivers/remoteproc/mtk_common.h
> @@ -112,6 +112,13 @@ struct mtk_scp_of_data {
>   	size_t ipi_buf_offset;
>   };
>   
> +struct mtk_scp_of_regs {

That's not a common structure, but rather a commodity for internal flow: the right
place for this one is in mtk_scp.c

Regards,
Angelo

> +	void __iomem *reg_base;
> +	void __iomem *l1tcm_base;
> +	size_t l1tcm_size;
> +	phys_addr_t l1tcm_phys;
> +};
> +
>   struct mtk_scp {
>   	struct device *dev;
>   	struct rproc *rproc;
> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index b92274067522..feebcadd56cd 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -854,7 +854,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)