drivers/misc/lis3lv02d/lis3lv02d_spi.c: add DT matching table passthru code

If probed from a device tree, this driver now passes the node information
to the generic part, so the runtime information can be derived.

Successfully tested on a PXA3xx board.

[akpm@linux-foundation.org: fix lis302dl_spi_dt_ids unused warning when CONFIG_OF=n]
Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: Rob Herring <robherring2@gmail.com>
Cc: "AnilKumar, Chimata" <anilkumar@ti.com>
Reviewed-by: Éric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/lis3lv02d/lis3lv02d_spi.c

@@ -17,6 +17,8 @@
 #include <linux/workqueue.h>
 #include <linux/spi/spi.h>
 #include <linux/pm.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
 
 #include "lis3lv02d.h"
 
@@ -58,6 +60,14 @@ static int lis3_spi_init(struct lis3lv02d *lis3)
 static union axis_conversion lis3lv02d_axis_normal =
 	{ .as_array = { 1, 2, 3 } };
 
+#ifdef CONFIG_OF
+static struct of_device_id lis302dl_spi_dt_ids[] = {
+	{ .compatible = "st,lis302dl-spi" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, lis302dl_spi_dt_ids);
+#endif
+
 static int __devinit lis302dl_spi_probe(struct spi_device *spi)
 {
 	int ret;
@@ -75,6 +85,12 @@ static int __devinit lis302dl_spi_probe(struct spi_device *spi)
 	lis3_dev.irq		= spi->irq;
 	lis3_dev.ac		= lis3lv02d_axis_normal;
 	lis3_dev.pdata		= spi->dev.platform_data;
+
+#ifdef CONFIG_OF
+	if (of_match_device(lis302dl_spi_dt_ids, &spi->dev))
+		lis3_dev.of_node = spi->dev.of_node;
+#endif
+
 	spi_set_drvdata(spi, &lis3_dev);
 
 	return lis3lv02d_init_device(&lis3_dev);
@@ -121,6 +137,7 @@ static struct spi_driver lis302dl_spi_driver = {
 		.name   = DRV_NAME,
 		.owner  = THIS_MODULE,
 		.pm	= &lis3lv02d_spi_pm,
+		.of_match_table = of_match_ptr(lis302dl_spi_dt_ids),
 	},
 	.probe	= lis302dl_spi_probe,
 	.remove	= __devexit_p(lis302dl_spi_remove),