linux-kernel - Re: [PATCH v4 5/7] remoteproc: mtk_apu: Use match

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Date:   Mon, 14 Mar 2022 17:27:37 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Alexandre Bailon <abailon@...libre.com>
Cc:     ohad@...ery.com, mathieu.poirier@...aro.org, robh+dt@...nel.or,
        matthias.bgg@...il.com, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        stephane.leprovost@...iatek.com, khilman@...libre.com,
        Julien STEPHAN <jstephan@...libre.com>
Subject: Re: [PATCH v4 5/7] remoteproc: mtk_apu: Use match_data

On Fri 04 Mar 10:15 CST 2022, Alexandre Bailon wrote:

> From: Julien STEPHAN <jstephan@...libre.com>
> 
> This commits prepare the driver to be more generic in order to support
> multiple platform using the compatible property.
> To do that, put some register values and the clocks names inside
> private data.
> 
> Signed-off-by: Julien STEPHAN <jstephan@...libre.com>
> Signed-off-by: Alexandre Bailon <abailon@...libre.com>
> ---
>  drivers/remoteproc/mtk_apu.c | 35 ++++++++++++++++++++++++++++-------
>  1 file changed, 28 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/remoteproc/mtk_apu.c b/drivers/remoteproc/mtk_apu.c
> index 3905eb5b7174..deec51b86ba5 100644
> --- a/drivers/remoteproc/mtk_apu.c
> +++ b/drivers/remoteproc/mtk_apu.c
> @@ -58,12 +58,20 @@
>  
>  #define APU_RESET_DELAY				(27)
>  
> +struct mtk_apu_conf {
> +	u32 core_default0;
> +	u32 core_default1;
> +	u32 num_clks;
> +	const char * const *clk_names;
> +};
> +
>  struct mtk_apu_rproc {
>  	struct device *dev;
>  	void __iomem *base;
>  	int irq;
>  	unsigned int num_clks;
>  	struct clk_bulk_data *clks;
> +	struct mtk_apu_conf *conf;
>  	struct iommu_domain *domain;
>  	struct list_head mappings;
>  
> @@ -81,6 +89,13 @@ static const char * const mt8183_clk_names[] = {
>  	"jtag"
>  };
>  
> +static const struct mtk_apu_conf mt8183_conf = {
> +	.core_default0 = (0x10 << 23) | (0x10 << 18),

CORE_DEFAULT0_AWUSER_USE_IOMMU | CORE_DEFAULT0_ARUSER_USE_IOMMU ?

> +	.core_default1 = (0x10 << 0) | (0x10 << 5),

CORE_DEFAULT0_AWUSER_IDMA_USE_IOMMU | CORE_DEFAULT0_ARUSER_IDMA_USE_IOMMU ?

Regards,
Bjorn

> +	.num_clks = ARRAY_SIZE(mt8183_clk_names),
> +	.clk_names = mt8183_clk_names
> +};
> +
>  static int mtk_apu_iommu_map(struct rproc *rproc, struct rproc_mem_entry *entry)
>  {
>  	struct mtk_apu_rproc *apu_rproc = rproc->priv;
> @@ -289,10 +304,9 @@ static int mtk_apu_rproc_start(struct rproc *rproc)
>  	writel(core_ctrl, apu_rproc->base + CORE_CTRL);
>  
>  	/* Configure memory accesses to go through the IOMMU */
> -	writel(CORE_DEFAULT0_AWUSER_USE_IOMMU | CORE_DEFAULT0_ARUSER_USE_IOMMU |
> -	      CORE_DEFAULT0_QOS_SWAP_1, apu_rproc->base + CORE_DEFAULT0);
> -	writel(CORE_DEFAULT0_AWUSER_IDMA_USE_IOMMU |
> -		CORE_DEFAULT0_ARUSER_IDMA_USE_IOMMU,
> +	writel(apu_rproc->conf->core_default0 | CORE_DEFAULT0_QOS_SWAP_1,
> +		apu_rproc->base + CORE_DEFAULT0);
> +	writel(apu_rproc->conf->core_default1,
>  		apu_rproc->base + CORE_DEFAULT1);
>  
>  	/* Release the APU */
> @@ -565,11 +579,18 @@ static int mtk_apu_rproc_probe(struct platform_device *pdev)
>  		goto free_rproc;
>  	}
>  
> -	apu_rproc->num_clks = ARRAY_SIZE(mt8183_clk_names);
> +
> +	apu_rproc->conf = (struct mtk_apu_conf *)device_get_match_data(dev);
> +	if (!apu_rproc->conf) {
> +		ret = -ENODEV;
> +		goto free_rproc;
> +	}
> +
> +	apu_rproc->num_clks = apu_rproc->conf->num_clks;
>  	apu_rproc->clks = devm_kcalloc(dev, apu_rproc->num_clks,
>  				     sizeof(*apu_rproc->clks), GFP_KERNEL);
>  	for (i = 0; i < apu_rproc->num_clks; ++i)
> -		apu_rproc->clks[i].id = mt8183_clk_names[i];
> +		apu_rproc->clks[i].id = apu_rproc->conf->clk_names[i];
>  
>  	ret = devm_clk_bulk_get(dev, apu_rproc->num_clks, apu_rproc->clks);
>  	if (ret) {
> @@ -611,7 +632,7 @@ static int mtk_apu_rproc_remove(struct platform_device *pdev)
>  }
>  
>  static const struct of_device_id mtk_apu_rproc_of_match[] = {
> -	{ .compatible = "mediatek,mt8183-apu", },
> +	{ .compatible = "mediatek,mt8183-apu", .data = &mt8183_conf },
>  	{ /* sentinel */ },
>  };
>  MODULE_DEVICE_TABLE(of, mtk_apu_rproc_of_match);
> -- 
> 2.34.1
>