RTC: pcf8563, prevent writing to TD[1:0] to work with bootselect

* disable TIMER_CONTROL register TD[1:0] bit configuration in PCF8563 driver
  probe since we use that bits for bootselect

recipes-kernel/modules/rtc-pcf8563-guf/rtc-pcf8563-guf.c

@@ -549,7 +549,9 @@ static int pcf8563_probe(struct i2c_client *client,
 {
 	struct pcf8563 *pcf8563;
 	int err;
+#if 0
 	unsigned char buf;
+#endif
 
 	dev_dbg(&client->dev, "%s\n", __func__);
 
@@ -565,6 +567,12 @@ static int pcf8563_probe(struct i2c_client *client,
 	pcf8563->client = client;
 	device_set_wakeup_capable(&client->dev, 1);
 
+	/* Garz & Fricke systems use the TD[1:0] bits for bootselect storage.
+	   So, we do not apply the power saving setting as stated in the datasheet
+	   since we would reset the bootselect bits and mess up the boot control
+	   between Yocto and FNG System.
+	 */
+#if 0
 	/* Set timer to lowest frequency to save power (ref Haoyu datasheet) */
 	buf = PCF8563_TMRC_1_60;
 	err = pcf8563_write_block_data(client, PCF8563_REG_TMRC, 1, &buf);
@@ -572,6 +580,7 @@ static int pcf8563_probe(struct i2c_client *client,
 		dev_err(&client->dev, "%s: write error\n", __func__);
 		return err;
 	}
+#endif
 
 	/* Clear flags and disable interrupts */
 	buf = 0;
@@ -625,9 +634,9 @@ MODULE_DEVICE_TABLE(i2c, pcf8563_id);
 
 #ifdef CONFIG_OF
 static const struct of_device_id pcf8563_of_match[] = {
-	{ .compatible = "nxp,pcf8563" },
-	{ .compatible = "epson,rtc8564" },
-	{ .compatible = "microcrystal,rv8564" },
+	{ .compatible = "nxp,pcf8563-guf" },
+	{ .compatible = "epson,rtc8564-guf" },
+	{ .compatible = "microcrystal,rv8564-guf" },
 	{}
 };
 MODULE_DEVICE_TABLE(of, pcf8563_of_match);