Geert Uytterhoeven wrote:
I've been looking into problems with auto-loading the RTC driver on PPC (more
specifically on PS3):
- The recent "rtc-ppc" RTC class driver is not autoloaded by udev because
it's an old style platform driver that contains its own platform device.
- The alternative old "genrtc" driver is autoloaded on non-udev systems only
because it contains the module alias char-major-10-135. However, it's not
a new-style RTC class driver.
Fortunately there already exists a generic RTC class driver: "rtc-parisc".
Despite it's name, it's platform-independent, as it's build on top of the RTC
abstraction used by "genrtc".
This patch series
- adds a missing module alias to rtc-parisc,
- renames rtc-parisc to rtc-generic,
- converts the architectures that currently have CONFIG_GEN_RTC enabled in
their defconfig (m68k, parisc, powerpc) to rtc-generic,
- removes the obsolete rtc-ppc driver,
- removes the old genrtc driver.
Note that genrtc may be used on other archictectures as well: at least alpha
has the required infrastructure ([gs]et_rtc_time()). The Kconfig rules allow
genrtc to be enabled on several others (cris, h8300, mn10300, um, x86, xtensa).
Furthermore genrtc and rtc-generic are not 100% userspace compatible:
- /dev/rtc provided by genrtc uses a misc character device (10:135),
- /dev/rtc provided by rtc-generic uses a dynamic character device.
So perhaps we don't want to kill gen-rtc yet?
Any comments are welcomed!
Hi Geert,
FYI, I didn't followed any discussions or changes around the RTC drivers for parisc,
but Dann Frazier did some work on the parisc RTC driver as well.
His patches were merged (not upstream yet!) in Kyle's "rtc-parisc" branch at:
http://git.kernel.org/?p=linux/kernel/git/kyle/parisc-2.6.git;a=shortlog;h=rtc-parisc
Not sure if they conflict (or are in sync) with your patches...
Helge
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