linux-kernel - [PATCH 4/4] rtc: ds1307: add device tree support

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Date:	Mon, 24 Nov 2014 16:49:24 +0100
From:	Tomas Novotny <tomas@...otny.cz>
To:	Alessandro Zummo <a.zummo@...ertech.it>, rtc-linux@...glegroups.com
Cc:	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tomas Novotny <tomas@...otny.cz>
Subject: [PATCH 4/4] rtc: ds1307: add device tree support

Note that alarm interrupt and trickle charger are not handled (I have no
hardware with these features).

Signed-off-by: Tomas Novotny <tomas@...otny.cz>
---

Only the "common" compatible string for that driver (maxim,ds1307) is
documented, so checkpatch complains for the rest. If it is better to document
every compatible, I will post a new series with documentation files pointing to
the maxim,ds1307.txt.

 drivers/rtc/rtc-ds1307.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 4ffabb3..3bb6a20 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -18,6 +18,7 @@
 #include <linux/string.h>
 #include <linux/rtc.h>
 #include <linux/bcd.h>
+#include <linux/of.h>
 #include <linux/rtc/ds1307.h>
 
 /*
@@ -1242,10 +1243,31 @@ static int ds1307_remove(struct i2c_client *client)
 	return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id ds1307_driver_dt_ids[] = {
+	/* driver_data are passed through ds1307_id */
+	{ .compatible = "maxim,ds1307" },
+	{ .compatible = "maxim,ds1337" },
+	{ .compatible = "maxim,ds1338" },
+	{ .compatible = "maxim,ds1339" },
+	{ .compatible = "maxim,ds1388" },
+	{ .compatible = "maxim,ds1340" },
+	{ .compatible = "maxim,ds3231" },
+	{ .compatible = "st,m41t00" },
+	{ .compatible = "microchip,mcp7940x" },
+	{ .compatible = "microchip,mcp7941x" },
+	{ .compatible = "pericom,pt7c4338" },
+	{ .compatible = "epson,rx8025" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ds1307_driver_dt_ids);
+#endif
+
 static struct i2c_driver ds1307_driver = {
 	.driver = {
 		.name	= "rtc-ds1307",
 		.owner	= THIS_MODULE,
+		.of_match_table	= of_match_ptr(ds1307_driver_dt_ids),
 	},
 	.probe		= ds1307_probe,
 	.remove		= ds1307_remove,
-- 
2.1.2

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