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 | |