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
26