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/ep93xx-regs.h> 9 #include <mach/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 26