1. 06 2月, 2008 2 次提交
    • D
      gpiolib: add drivers/gpio directory · a9c5fff5
      David Brownell 提交于
      Add an empty drivers/gpio directory for gpiolib infrastructure and GPIO
      expanders.  It will be populated by later patches.
      
      This won't be the only place to hold such gpio_chip code.  Many external chips
      add a few GPIOs as secondary functionality (such as MFD drivers) and platform
      code frequently needs to closely integrate GPIO and IRQ support.
      
      This is placed *early* in the build/link sequence since it's common for other
      drivers to depend on GPIOs to do their work, so they must be initialized early
      in the device_initcall() sequence.
      Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
      Acked-by: NJean Delvare <khali@linux-fr.org>
      Cc: Eric Miao <eric.miao@marvell.com>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
      Cc: Philipp Zabel <philipp.zabel@gmail.com>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Ben Gardner <bgardner@wabtec.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      a9c5fff5
    • D
      timerfd: new timerfd API · 4d672e7a
      Davide Libenzi 提交于
      This is the new timerfd API as it is implemented by the following patch:
      
      int timerfd_create(int clockid, int flags);
      int timerfd_settime(int ufd, int flags,
      		    const struct itimerspec *utmr,
      		    struct itimerspec *otmr);
      int timerfd_gettime(int ufd, struct itimerspec *otmr);
      
      The timerfd_create() API creates an un-programmed timerfd fd.  The "clockid"
      parameter can be either CLOCK_MONOTONIC or CLOCK_REALTIME.
      
      The timerfd_settime() API give new settings by the timerfd fd, by optionally
      retrieving the previous expiration time (in case the "otmr" parameter is not
      NULL).
      
      The time value specified in "utmr" is absolute, if the TFD_TIMER_ABSTIME bit
      is set in the "flags" parameter.  Otherwise it's a relative time.
      
      The timerfd_gettime() API returns the next expiration time of the timer, or
      {0, 0} if the timerfd has not been set yet.
      
      Like the previous timerfd API implementation, read(2) and poll(2) are
      supported (with the same interface).  Here's a simple test program I used to
      exercise the new timerfd APIs:
      
      http://www.xmailserver.org/timerfd-test2.c
      
      [akpm@linux-foundation.org: coding-style cleanups]
      [akpm@linux-foundation.org: fix ia64 build]
      [akpm@linux-foundation.org: fix m68k build]
      [akpm@linux-foundation.org: fix mips build]
      [akpm@linux-foundation.org: fix alpha, arm, blackfin, cris, m68k, s390, sparc and sparc64 builds]
      [heiko.carstens@de.ibm.com: fix s390]
      [akpm@linux-foundation.org: fix powerpc build]
      [akpm@linux-foundation.org: fix sparc64 more]
      Signed-off-by: NDavide Libenzi <davidel@xmailserver.org>
      Cc: Michael Kerrisk <mtk-manpages@gmx.net>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Davide Libenzi <davidel@xmailserver.org>
      Cc: Michael Kerrisk <mtk-manpages@gmx.net>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Cc: Davide Libenzi <davidel@xmailserver.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      4d672e7a
  2. 05 2月, 2008 12 次提交
  3. 04 2月, 2008 26 次提交