1. 29 5月, 2009 1 次提交
  2. 24 4月, 2009 1 次提交
    • P
      OMAP2/3 GPTIMER: allow system tick GPTIMER to be changed in board-*.c files · f248076c
      Paul Walmsley 提交于
      Add a function omap2_gp_clockevent_set_gptimer() for board-*.c files
      to use in .init_irq functions to configure the system tick GPTIMER.
      Practical choices at this point are GPTIMER1 or GPTIMER12.  Both of
      these timers are in the WKUP powerdomain, and so are unaffected by
      chip power management.  GPTIMER1 can use sys_clk as a source, for
      applications where a high-resolution timer is more important than
      power management.  GPTIMER12 has the special property that it has the
      secure 32kHz oscillator as its source clock, which may be less prone
      to glitches than the off-chip 32kHz oscillator.  But on HS devices, it
      may not be available for Linux use.
      
      It appears that most boards are fine with GPTIMER1, but BeagleBoard
      should use GPTIMER12 when using a 32KiHz timer source, due to hardware bugs
      in revisions B4 and below.  Modify board-omap3beagle.c to use GPTIMER12.
      
      This patch originally used a Kbuild config option to select the GPTIMER,
      but was changed to allow this to be specified in board-*.c files, per
      Tony's request.
      
      Kalle Vallo <kalle.valo@nokia.com> found a bug in an earlier version of
      this patch - thanks Kalle.
      
      Tested on Beagle rev B4 ES2.1, with and without CONFIG_OMAP_32K_TIMER, and
      3430SDP.
      Signed-off-by: NPaul Walmsley <paul@pwsan.com>
      Signed-off-by: NTony Lindgren <tony@atomide.com>
      Cc: Kalle Valo <kalle.valo@nokia.com>
      f248076c
  3. 24 3月, 2009 2 次提交
  4. 05 3月, 2009 1 次提交
  5. 09 2月, 2009 1 次提交
    • P
      [ARM] OMAP2 SDRC: add SDRAM timing parameter infrastructure · 87246b75
      Paul Walmsley 提交于
      For a given SDRAM clock rate, SDRAM chips require memory controllers
      to use a specific set of timing minimums and maximums to transfer data
      reliably.  These parameters can be different for different memory chips
      and can also potentially vary by board.
      
      This patch adds the infrastructure for board-*.c files to pass this
      timing data to the SDRAM controller init function.  The timing data is
      specified in an 'omap_sdrc_params' structure, in terms of SDRC
      controller register values.  An array of these structs, one per SDRC
      target clock rate, is passed by the board-*.c file to
      omap2_init_common_hw().
      
      This patch does not define the values for different memory chips, nor
      does it use the values for anything; those will come in subsequent patches.
      
      linux-omap source commit is bc84ecfc795c2d1c5cda8da4127cf972f488a696.
      Signed-off-by: NPaul Walmsley <paul@pwsan.com>
      Signed-off-by: NTony Lindgren <tony@atomide.com>
      Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      87246b75
  6. 15 1月, 2009 1 次提交
  7. 11 12月, 2008 1 次提交
  8. 09 10月, 2008 1 次提交