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

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Message-ID: <20110615190754.11693.26335.stgit@ponder>
Date:	Wed, 15 Jun 2011 13:07:54 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, Erik Gilling <konkers@...roid.com>
Cc:	Stephen Warren <swarren@...dia.com>
Subject: [PATCH] spi/tegra: add devicetree support

Allow the tegra spi driver to obtain populate the spi bus with devices
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.
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),
 };

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