arch/arm/mach-ep93xx/include/mach/hardware.h

   1 /*
   2  * arch/arm/mach-ep93xx/include/mach/hardware.h
   3  */
   4
   5 #ifndef __ASM_ARCH_HARDWARE_H
   6 #define __ASM_ARCH_HARDWARE_H
   7
   8 #include <mach/platform.h>
   9
  10 /*
  11  * The EP93xx has two external crystal oscillators.  To generate the
  12  * required high-frequency clocks, the processor uses two phase-locked-
  13  * loops (PLLs) to multiply the incoming external clock signal to much
  14  * higher frequencies that are then divided down by programmable dividers
  15  * to produce the needed clocks.  The PLLs operate independently of one
  16  * another.
  17  */
  18 #define EP93XX_EXT_CLK_RATE     14745600
  19 #define EP93XX_EXT_RTC_RATE     32768
  20
  21 #define EP93XX_KEYTCHCLK_DIV4   (EP93XX_EXT_CLK_RATE / 4)
  22 #define EP93XX_KEYTCHCLK_DIV16  (EP93XX_EXT_CLK_RATE / 16)
  23
  24 #endif