rtc: ds3232: Add OF device ID table

The driver doesn't have a struct of_device_id table but supported devices
are registered via Device Trees. This is working on the assumption that a
I2C device registered via OF will always match a legacy I2C device ID and
that the MODALIAS reported will always be of the form i2c:<device>.

But this could change in the future so the correct approach is to have an
OF device ID table if the devices are registered via OF.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

diff --git a/drivers/rtc/rtc-ds3232.c b/drivers/rtc/rtc-ds3232.c
index 9bb39a0..deff431 100644 (file)
--- a/drivers/rtc/rtc-ds3232.c
+++ b/drivers/rtc/rtc-ds3232.c
@@ -442,9 +442,16 @@ static const struct i2c_device_id ds3232_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, ds3232_id);
 
+static const struct of_device_id ds3232_of_match[] = {
+       { .compatible = "dallas,ds3232" },
+       { }
+};
+MODULE_DEVICE_TABLE(of, ds3232_of_match);
+
 static struct i2c_driver ds3232_driver = {
        .driver = {
                .name = "rtc-ds3232",
+               .of_match_table = of_match_ptr(ds3232_of_match),
                .pm     = &ds3232_pm_ops,
        },
        .probe = ds3232_i2c_probe,