[PATCH v2 12/19] ARM: at91/rtc-at91sam9: each SoC can select the RTT device to use

On Wednesday 22 February 2012, Nicolas Ferre wrote:

From: Jean-Christophe PLAGNIOL-VILLARD <redacted>

For the RTT as RTC driver rtc-at91sam9, the platform_device structure
is filled during SoC initialization. This will allow to convert this
RTC driver as a standard platform driver.

Can you make this more elaborate? I don't see from this or the code why
you don't just always register the RTT as "rtc-at91sam9". There seems to
be no driver for the "at91_rtt" in tree, so I don't know if there is
an out of tree driver binding to it.

Would it be possible to remove the compile time #if and the resetting
of the device name if both drivers bind to the rtc name and the other
rtt driver binds to both names?
 

 static int __init at91_rtc_init(void)
 {
-	int status;
-	struct device *rtc;
-
-	status = platform_driver_register(&at91_rtc_driver);
-	if (status)
-		return status;
-	rtc = bus_find_device(&platform_bus_type, NULL,
-			NULL, at91_rtc_match);
-	if (!rtc)
-		platform_driver_unregister(&at91_rtc_driver);
-	return rtc ? 0 : -ENODEV;
+	return platform_driver_register(&at91_rtc_driver);
 }
 module_init(at91_rtc_init);

This can become module_platform_driver().

	Arnd