Hi, On 12/11/2020 17:57:51+0200, Andy Shevchenko wrote: > The commit 9c19b8930d2c ("rtc: ds1307: Add ACPI support") added non-valid > ACPI IDs (all of them abusing ACPI specification). Moreover there is > no even a single evidence that vendor registered any of such device. > > Remove broken ACPI IDs from the driver. For prototyping one may use PRP0001 > with device tree defined bindings. The following patches will add support > of that to the driver. I'm intrigued, how does PRP0001 work? Where would the device tree come from? You probably want to have a look at: https://lore.kernel.org/linux-rtc/20201112130734.331094-3-ch@xxxxxxx/T/#u -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com