spi/orion: add device tree binding

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@googlemail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/spi/spi-orion.c b/drivers/spi/spi-orion.c
index dfd04e91fa6d..74312a862ba8 100644
--- a/drivers/spi/spi-orion.c
+++ b/drivers/spi/spi-orion.c
@@ -17,6 +17,7 @@
 #include <linux/io.h>
 #include <linux/spi/spi.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/clk.h>
 #include <asm/unaligned.h>
 
@@ -453,6 +454,8 @@ static int __init orion_spi_probe(struct platform_device *pdev)
         struct orion_spi_info *spi_info;
         unsigned long tclk_hz;
         int status = 0;
+        const u32 *iprop;
+        int size;
 
         spi_info = pdev->dev.platform_data;
 
@@ -464,6 +467,12 @@ static int __init orion_spi_probe(struct platform_device *pdev)
 
         if (pdev->id != -1)
                 master->bus_num = pdev->id;
+        if (pdev->dev.of_node) {
+                iprop = of_get_property(pdev->dev.of_node, "cell-index",
+                                        &size);
+                if (iprop && size == sizeof(*iprop))
+                        master->bus_num = *iprop;
+        }
 
         /* we support only mode 0, and no options */
         master->mode_bits = 0;
@@ -511,6 +520,7 @@ static int __init orion_spi_probe(struct platform_device *pdev)
         if (orion_spi_reset(spi) < 0)
                 goto out_rel_mem;
 
+        master->dev.of_node = pdev->dev.of_node;
         status = spi_register_master(master);
         if (status < 0)
                 goto out_rel_mem;
@@ -552,10 +562,17 @@ static int __exit orion_spi_remove(struct platform_device *pdev)
 
 MODULE_ALIAS("platform:" DRIVER_NAME);
 
+static const struct of_device_id orion_spi_of_match_table[] __devinitdata = {
+        { .compatible = "marvell,orion-spi", },
+        {}
+};
+MODULE_DEVICE_TABLE(of, orion_spi_of_match_table);
+
 static struct platform_driver orion_spi_driver = {
         .driver = {
                 .name   = DRIVER_NAME,
                 .owner  = THIS_MODULE,
+                .of_match_table = of_match_ptr(orion_spi_of_match_table),
         },
         .remove         = __exit_p(orion_spi_remove),
 };