linux-kernel - RE: [PATCH] spi/tegra: add devicetree support

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Date:	Wed, 15 Jun 2011 12:25:49 -0700
From:	Stephen Warren <swarren@...dia.com>
To:	Grant Likely <grant.likely@...retlab.ca>,
	"spi-devel-general@...ts.sourceforge.net" 
	<spi-devel-general@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Erik Gilling <konkers@...roid.com>
Subject: RE: [PATCH] spi/tegra: add devicetree support

Grant Likely wrote at Wednesday, June 15, 2011 1:08 PM:
> Allow the tegra spi driver to obtain populate the spi bus with devices

Remote "obtain"?

> from the device tree.
> 
> Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
> ---
>  .../devicetree/bindings/spi/spi_nvidia.txt         |    5 +++++
>  drivers/spi/spi-tegra.c                            |   12 ++++++++++++
>  2 files changed, 17 insertions(+), 0 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/spi/spi_nvidia.txt
> 
> diff --git a/Documentation/devicetree/bindings/spi/spi_nvidia.txt b/Documentation/devicetree/bindings/spi/spi_nvidia.txt
> new file mode 100644
> index 0000000..bde450b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/spi_nvidia.txt
> @@ -0,0 +1,5 @@
> +NVIDIA Tegra 2 SPI device
> +
> +Required properties:
> +- compatible : should be "nvidia,tegra250-spi".
> +- gpios : should specify GPIOs used for chipselect.

Are things like reg, interrupts, and other general stuff implicit?
I notice that fsl-spi.txt does specify those, but spi_altera.txt
and spi_oc_tiny.txt don't.

Otherwise, LGTM.

> diff --git a/drivers/spi/spi-tegra.c b/drivers/spi/spi-tegra.c
> index 8e30727..a43ceeb 100644
> --- a/drivers/spi/spi-tegra.c
> +++ b/drivers/spi/spi-tegra.c
> @@ -546,6 +546,7 @@ static int __init spi_tegra_probe(struct
> platform_device *pdev)
>  	tspi->rx_dma_req.req_sel = spi_tegra_req_sels[pdev->id];
>  	tspi->rx_dma_req.dev = tspi;
> 
> +	master->dev.of_node = pdev->dev.of_node;
>  	ret = spi_register_master(master);
> 
>  	if (ret < 0)
> @@ -595,10 +596,21 @@ static int __devexit spi_tegra_remove(struct
> platform_device *pdev)
> 
>  MODULE_ALIAS("platform:spi_tegra");
> 
> +#ifdef CONFIG_OF
> +static struct of_device_id spi_tegra_of_match_table[] __devinitdata = {
> +	{ .compatible = "nvidia,tegra250-spi", },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, spi_tegra_of_match_table);
> +#else /* CONFIG_OF */
> +#define spi_tegra_of_match_table NULL
> +#endif /* CONFIG_OF */
> +
>  static struct platform_driver spi_tegra_driver = {
>  	.driver = {
>  		.name =		"spi_tegra",
>  		.owner =	THIS_MODULE,
> +		.of_match_table = spi_tegra_of_match_table,
>  	},
>  	.remove =	__devexit_p(spi_tegra_remove),
>  };

-- 
nvpublic