1. 25 1月, 2008 3 次提交
  2. 07 12月, 2007 3 次提交
  3. 15 11月, 2007 1 次提交
  4. 20 10月, 2007 1 次提交
  5. 19 7月, 2007 2 次提交
  6. 27 4月, 2007 4 次提交
  7. 05 3月, 2007 1 次提交
    • D
      [PATCH] add CONFIG_GENERIC_GPIO · 0a938b97
      David Brownell 提交于
      Most drivers using GPIOs already know they are running on a system that
      supports the generic GPIO calls, because of other platform dependencies.
      But the generic GPIO-based LED and input button drivers can't know that.
      
      So this patch adds a Kconfig hook, GENERIC_GPIO, to mark the platforms
      where <asm/gpio.h> will do the right thing.  Currently that's a bunch of
      ARMs, and AVR32; more are on the way.
      
      It also fixes a dependency bug for the gpio button input driver; it was
      wrong to start with, now it covers all platforms with GENERIC_GPIO.
      Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
      Acked-by: NRichard Purdie <rpurdie@rpsys.net>
      Cc: Arnaud Patard <arnaud.patard@rtp-net.org>
      Cc: <raph@8d.com>
      Cc: <msvoboda@ra.rockwell.com>
      Cc: pHilipp Zabel <philipp.zabel@gmail.com>
      Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
      Cc: Dmitry Torokhov <dtor@mail.ru>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      0a938b97
  8. 09 12月, 2006 1 次提交
    • D
      [PATCH] LOG2: Implement a general integer log2 facility in the kernel · f0d1b0b3
      David Howells 提交于
      This facility provides three entry points:
      
      	ilog2()		Log base 2 of unsigned long
      	ilog2_u32()	Log base 2 of u32
      	ilog2_u64()	Log base 2 of u64
      
      These facilities can either be used inside functions on dynamic data:
      
      	int do_something(long q)
      	{
      		...;
      		y = ilog2(x)
      		...;
      	}
      
      Or can be used to statically initialise global variables with constant values:
      
      	unsigned n = ilog2(27);
      
      When performing static initialisation, the compiler will report "error:
      initializer element is not constant" if asked to take a log of zero or of
      something not reducible to a constant.  They treat negative numbers as
      unsigned.
      
      When not dealing with a constant, they fall back to using fls() which permits
      them to use arch-specific log calculation instructions - such as BSR on
      x86/x86_64 or SCAN on FRV - if available.
      
      [akpm@osdl.org: MMC fix]
      Signed-off-by: NDavid Howells <dhowells@redhat.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Wojtek Kaniewski <wojtekka@toxygen.net>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      f0d1b0b3
  9. 26 9月, 2006 1 次提交