linux-kernel - Re: [PATCH v5 2/5] dmaengine: imx-sdma: add imx8mq sdma compatible parts

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Date:   Mon, 28 Jan 2019 10:32:04 +0100
From:   Lucas Stach <l.stach@...gutronix.de>
To:     "Angus Ainslie (Purism)" <angus@...ea.ca>
Cc:     angus.ainslie@...i.sm, Vinod Koul <vkoul@...nel.org>,
        dmaengine@...r.kernel.org, NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Daniel Baluta <daniel.baluta@...il.com>
Subject: Re: [PATCH v5 2/5] dmaengine: imx-sdma: add imx8mq sdma compatible
 parts

Am Sonntag, den 27.01.2019, 23:08 -0700 schrieb Angus Ainslie (Purism):
> This is identical to the imx7d.

So it can be dropped and the i.MX8M DT should just specify the
"fsl,imx7d-sdma" as a fallback compatible for the SDMA codes.

If both the imx8m and imx7d compatible are present in the DT, we can
introduce a more specific matchic when we actually need it. No need to
pollute the code with this from the start.

Regards,
Lucas

> Signed-off-by: Angus Ainslie (Purism) <angus@...ea.ca>
> ---
>  drivers/dma/imx-sdma.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index 757fad2fbfae..c4db4fe6bcc9 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -578,6 +578,9 @@ static const struct platform_device_id
> sdma_devtypes[] = {
>  	}, {
>  		.name = "imx7d-sdma",
>  		.driver_data = (unsigned long)&sdma_imx7d,
> +	}, {
> +		.name = "imx8mq-sdma",
> +		.driver_data = (unsigned long)&sdma_imx7d,
>  	}, {
>  		/* sentinel */
>  	}
> @@ -592,6 +595,7 @@ static const struct of_device_id sdma_dt_ids[] =
> {
>  	{ .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, },
>  	{ .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, },
>  	{ .compatible = "fsl,imx7d-sdma", .data = &sdma_imx7d, },
> +	{ .compatible = "fsl,imx8mq-sdma", .data = &sdma_imx7d, },
>  	{ /* sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, sdma_dt_ids);