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9626f1f117
linux/drivers/char
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Bjorn Helgaas 9626f1f117 rtc: fall back to requesting only the ports we actually use 
Firmware like PNPBIOS or ACPI can report the address space consumed by the
RTC.  The actual space consumed may be less than the size (RTC_IO_EXTENT)
assumed by the RTC driver.

The PNP core doesn't request resources yet, but I'd like to make it do so.
If/when it does, the RTC_IO_EXTENT request may fail, which prevents the RTC
driver from loading.

Since we only use the RTC index and data registers at RTC_PORT(0) and
RTC_PORT(1), we can fall back to requesting just enough space for those.

If the PNP core requests resources, this results in typical I/O port usage
like this:

    0070-0073 : 00:06		<-- PNP device 00:06 responds to 70-73
      0070-0071 : rtc		<-- RTC driver uses only 70-71

instead of the current:

    0070-0077 : rtc		<-- RTC_IO_EXTENT == 8

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-11-14 18:45:41 -08:00
..
agp x86 gart: rename CONFIG_IOMMU to CONFIG_GART_IOMMU 2007-10-30 00:22:22 +01:00
drm drm: DRM: fix memset size error 2007-11-06 10:12:44 +10:00
hw_random Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
ip2 drivers/char/ip2: separate polling and irq-driven work entry points 2007-10-23 19:53:16 -04:00
ipmi IPMI: add 0.9 support 2007-10-18 14:37:32 -07:00
mwave
pcmcia cm40x0_cs.c: fix debug macros 2007-11-14 18:45:37 -08:00
rio long vs. unsigned long - low-hanging fruits in drivers 2007-10-14 12:41:51 -07:00
tpm Eliminate pointless casts from void* in a few driver irq handlers. 2007-10-23 19:53:16 -04:00
.gitignore
amiserial.c some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
apm-emulation.c PM: Move definition of struct pm_ops to suspend.h 2007-10-18 14:37:18 -07:00
applicom.c
applicom.h
briq_panel.c [POWERPC] Remove dead code for preventing pread() and pwrite() calls 2007-07-10 22:03:26 +10:00
cd1865.h
ChangeLog
consolemap.c unicode diacritics support 2007-10-17 08:42:52 -07:00
cp437.uni
cs5535_gpio.c
cyclades.c Char: cyclades, fix potential NULL dereference 2007-10-23 08:32:06 -07:00
defkeymap.c_shipped unicode diacritics support 2007-10-17 08:42:52 -07:00
defkeymap.map
digi1.h
digiFep1.h
digiPCI.h
ds1286.c
ds1302.c
ds1620.c
dsp56k.c long vs. unsigned long - low-hanging fruits in drivers 2007-10-14 12:41:51 -07:00
dtlk.c
efirtc.c
epca.c epca.c: reformat comments and coding style improvements 2007-10-17 08:42:50 -07:00
epca.h
epcaconfig.h
esp.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
generic_nvram.c
generic_serial.c genericserial: remove bogus optimisation check and dead code paths 2007-07-16 09:05:51 -07:00
genrtc.c Char: genrtc, use wait_event_interruptible 2007-07-16 09:05:44 -07:00
hangcheck-timer.c Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
hpet.c Silent drivers/char/hpet.c build warnings on i386 2007-09-26 09:22:04 -07:00
hvc_beat.c [POWERPC] Init markings for hvc_beat 2007-08-17 11:01:50 +10:00
hvc_console.c Delay creation of khcvd thread 2007-10-17 08:43:00 -07:00
hvc_console.h
hvc_iseries.c [POWERPC] init and exit markings for hvc_iseries 2007-07-22 21:30:59 +10:00
hvc_rtas.c [POWERPC] Quiet section mismatch in hvc_rtas.c 2007-07-22 21:30:59 +10:00
hvc_vio.c
hvc_xen.c xen: use the hvc console infrastructure for Xen console 2007-07-18 08:47:44 -07:00
hvcs.c [POWERPC] hvcs: Make some things static and const 2007-07-22 21:30:59 +10:00
hvsi.c
i8k.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
ip27-rtc.c
isicom.c Add missing newlines to some uses of dev_<level> messages 2007-10-18 14:37:28 -07:00
istallion.c Convert from class_device to device in drivers/char 2007-10-12 14:51:04 -07:00
Kconfig Virtio console driver 2007-10-23 15:49:55 +10:00
keyboard.c get rid of input BIT* duplicate defines 2007-10-19 11:53:42 -07:00
lcd.c [MIPS] Delete duplicate inclusion of <linux/delay.h>. 2007-08-27 02:16:59 +01:00
lcd.h
lp.c lp_console: cleanups 2007-10-17 08:43:01 -07:00
Makefile Remove old lguest bus and drivers. 2007-10-23 15:49:55 +10:00
mbcs.c Clean up duplicate includes in drivers/char/ 2007-10-17 08:42:48 -07:00
mbcs.h mbcs: Remove lots of global symbols 2007-07-19 10:04:43 -07:00
mem.c x86 merge fallout: uml 2007-10-29 07:41:32 -07:00
misc.c Make /proc/misc use seq_list_xxx helpers 2007-07-16 09:05:42 -07:00
mmtimer.c Remove fs.h from mm.h 2007-07-29 17:09:29 -07:00
moxa.c Char: moxa, remove sleep_on 2007-10-18 14:37:27 -07:00
mspec.c Memoryless nodes: Uncached allocator updates 2007-10-16 09:42:58 -07:00
mxser_new.c remove asm/bitops.h includes 2007-10-19 11:53:41 -07:00
mxser_new.h
mxser.c remove asm/bitops.h includes 2007-10-19 11:53:41 -07:00
mxser.h mxser: Remove use of dead TTY_FLIPBUF_SIZE definition 2007-10-17 08:42:52 -07:00
n_hdlc.c n_hdlc.c: fix check-after-use 2007-10-17 08:42:55 -07:00
n_r3964.c Char: n_r3964, use wait_event_interruptible 2007-07-16 09:05:44 -07:00
n_tty.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
nsc_gpio.c
nvram.c COBALT: remove all references to Cobalt NVRAM 2007-07-16 09:05:47 -07:00
nwbutton.c
nwbutton.h
nwflash.c
pc8736x_gpio.c
ppdev.c [PARPORT] Remove unused 'irq' argument from parport irq functions 2007-10-23 19:53:16 -04:00
ps3flash.c ps3: FLASH ROM Storage Driver 2007-07-21 17:49:16 -07:00
pty.c sysctl: simplify the pty sysctl logic 2007-10-18 14:37:23 -07:00
random.c sparse pointer use of zero as null 2007-10-18 14:37:31 -07:00
raw.c cdev: remove unneeded setting of cdev names 2007-10-12 14:51:02 -07:00
riscom8_reg.h
riscom8.c drivers/char/riscom8: clean up irq handling 2007-10-23 19:53:17 -04:00
riscom8.h long vs. unsigned long - low-hanging fruits in drivers 2007-10-14 12:41:51 -07:00
rocket_int.h Char: rocket, switch sleep_on to completion 2007-10-18 14:37:27 -07:00
rocket.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
rocket.h
rtc.c rtc: fall back to requesting only the ports we actually use 2007-11-14 18:45:41 -08:00
scc.h
scx200_gpio.c
selection.c Kernel utf-8 handling 2007-07-16 09:05:46 -07:00
ser_a2232.c
ser_a2232.h
ser_a2232fw.ax
ser_a2232fw.h
serial167.c m68k: remove empty ->setup is several consoles 2007-07-20 08:24:49 -07:00
snsc_event.c [IA64] drivers/char/snsc_event.c:206: warning: unused variable `p' 2007-05-10 13:23:05 -07:00
snsc.c Convert from class_device to device in drivers/char 2007-10-12 14:51:04 -07:00
snsc.h
sonypi.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
specialix_io8.h
specialix.c Char: specialix, remove busy waiting 2007-07-17 10:23:10 -07:00
stallion.c Convert from class_device to device in drivers/char 2007-10-12 14:51:04 -07:00
sx.c Use helpers to obtain task pid in printks 2007-10-19 11:53:43 -07:00
sx.h long vs. unsigned long - low-hanging fruits in drivers 2007-10-14 12:41:51 -07:00
sxboards.h
sxwindow.h
synclink_gt.c synclink_gt endianness annotations 2007-10-14 12:41:51 -07:00
synclink.c Clean up duplicate includes in drivers/char/ 2007-10-17 08:42:48 -07:00
synclinkmp.c some kmalloc/memset ->kzalloc (tree wide) 2007-07-19 10:04:50 -07:00
sysrq.c pid namespaces: define is_global_init() and is_container_init() 2007-10-19 11:53:37 -07:00
tb0219.c
tipar.c Convert from class_device to device in drivers/char 2007-10-12 14:51:04 -07:00
tlclk.c
toshiba.c
tty_audit.c Audit: add TTY input auditing 2007-07-16 09:05:47 -07:00
tty_io.c Fix misspellings of "system", "controller", "interrupt" and "necessary". 2007-10-19 23:10:43 +02:00
tty_ioctl.c [TTY]: Fix network driver interactions with TCGET/SET calls. 2007-11-07 04:14:19 -08:00
vc_screen.c use mutex instead of semaphore in virtual console driver 2007-05-08 11:15:33 -07:00
viocons.c
viotape.c Convert from class_device to device in drivers/char 2007-10-12 14:51:04 -07:00
virtio_console.c virtio/virtcons: fix section mismatch warning 2007-11-05 15:12:32 -08:00
vme_scc.c m68k: remove empty ->setup is several consoles 2007-07-20 08:24:49 -07:00
vr41xx_giu.c [MIPS] Separate platform_device registration for VR41xx GPIO 2007-07-12 17:41:15 +01:00
vt_ioctl.c add CONFIG_VT_UNICODE 2007-10-17 08:42:56 -07:00
vt.c Console events and accessibility 2007-10-19 11:53:34 -07:00