linux-kernel - Re: [PATCH v2 6/7] dmaengine: fsl-edma: add i.mx7ulp edma2 version support

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Date:   Mon, 27 May 2019 11:05:53 +0200
From:   Sascha Hauer <s.hauer@...gutronix.de>
To:     yibin.gong@....com
Cc:     robh@...nel.org, shawnguo@...nel.org, festevam@...il.com,
        mark.rutland@....com, vkoul@...nel.org, dan.j.williams@...el.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, kernel@...gutronix.de,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 6/7] dmaengine: fsl-edma: add i.mx7ulp edma2 version
 support

On Mon, May 27, 2019 at 04:51:17PM +0800, yibin.gong@....com wrote:
> From: Robin Gong <yibin.gong@....com>
> 
> +static const struct of_device_id fsl_edma_dt_ids[] = {
> +	{ .compatible = "fsl,vf610-edma", .data = (void *)v1 },
> +	{ .compatible = "fsl,imx7ulp-edma", .data = (void *)v3 },
> +	{ /* sentinel */ }

Please put a struct type behind the .data pointer so that you can
configure...

> +};
> +MODULE_DEVICE_TABLE(of, fsl_edma_dt_ids);
> +
> @@ -218,6 +272,22 @@ static int fsl_edma_probe(struct platform_device *pdev)
>  	fsl_edma_setup_regs(fsl_edma);
>  	regs = &fsl_edma->regs;
>  
> +	if (fsl_edma->version == v3) {
> +		fsl_edma->dmamux_nr = 1;

...things like this...

> @@ -264,7 +334,11 @@ static int fsl_edma_probe(struct platform_device *pdev)
>  	}
>  
>  	edma_writel(fsl_edma, ~0, regs->intl);
> -	ret = fsl_edma_irq_init(pdev, fsl_edma);
> +
> +	if (fsl_edma->version == v3)
> +		ret = fsl_edma2_irq_init(pdev, fsl_edma);
> +	else
> +		ret = fsl_edma_irq_init(pdev, fsl_edma);

...and this one in that struct rather than littering the code more and
more with such version tests.

Sascha

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