arch/arm/mach-ep93xx/hardware.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * arch/arm/mach-ep93xx/include/mach/hardware.h
   4  */
   5
   6 #ifndef __ASM_ARCH_HARDWARE_H
   7 #define __ASM_ARCH_HARDWARE_H
   8
   9 #include "platform.h"
  10
  11 /*
  12  * The EP93xx has two external crystal oscillators.  To generate the
  13  * required high-frequency clocks, the processor uses two phase-locked-
  14  * loops (PLLs) to multiply the incoming external clock signal to much
  15  * higher frequencies that are then divided down by programmable dividers
  16  * to produce the needed clocks.  The PLLs operate independently of one
  17  * another.
  18  */
  19 #define EP93XX_EXT_CLK_RATE     14745600
  20 #define EP93XX_EXT_RTC_RATE     32768
  21
  22 #define EP93XX_KEYTCHCLK_DIV4   (EP93XX_EXT_CLK_RATE / 4)
  23 #define EP93XX_KEYTCHCLK_DIV16  (EP93XX_EXT_CLK_RATE / 16)
  24
  25 #endif