i2c: stu300: device tree support

This adds device tree support for the ST DDC I2C driver known
as "stu300" in the kernel tree.

Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-stu300.c b/drivers/i2c/busses/i2c-stu300.c
index 0a6f941133f6..1beaa05a3d2c 100644
--- a/drivers/i2c/busses/i2c-stu300.c
+++ b/drivers/i2c/busses/i2c-stu300.c
@@ -17,6 +17,7 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/slab.h>
+#include <linux/of_i2c.h>
 
 /* the name of this kernel module */
 #define NAME "stu300"
@@ -923,6 +924,7 @@ stu300_probe(struct platform_device *pdev)
         adap->nr = bus_nr;
         adap->algo = &stu300_algo;
         adap->dev.parent = &pdev->dev;
+        adap->dev.of_node = pdev->dev.of_node;
         i2c_set_adapdata(adap, dev);
 
         /* i2c device drivers may be active on return from add_adapter() */
@@ -934,6 +936,10 @@ stu300_probe(struct platform_device *pdev)
         }
 
         platform_set_drvdata(pdev, dev);
+        dev_info(&pdev->dev, "ST DDC I2C @ %p, irq %d\n",
+                 dev->virtbase, dev->irq);
+        of_i2c_register_devices(adap);
+
         return 0;
 }
 
@@ -978,11 +984,17 @@ stu300_remove(struct platform_device *pdev)
         return 0;
 }
 
+static const struct of_device_id stu300_dt_match[] = {
+        { .compatible = "st,ddci2c" },
+        {},
+};
+
 static struct platform_driver stu300_i2c_driver = {
         .driver = {
                 .name   = NAME,
                 .owner  = THIS_MODULE,
                 .pm     = STU300_I2C_PM,
+                .of_match_table = stu300_dt_match,
         },
         .remove         = __exit_p(stu300_remove),