| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* |
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| 3 | * arch/arm/mach-ep93xx/include/mach/hardware.h |
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| 4 | */ |
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| 5 | |
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| 6 | #ifndef __ASM_ARCH_HARDWARE_H |
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| 7 | #define __ASM_ARCH_HARDWARE_H |
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| 8 | |
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| 9 | #include "platform.h" |
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| 10 | |
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| 11 | /* |
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| 12 | * The EP93xx has two external crystal oscillators. To generate the |
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| 13 | * required high-frequency clocks, the processor uses two phase-locked- |
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| 14 | * loops (PLLs) to multiply the incoming external clock signal to much |
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| 15 | * higher frequencies that are then divided down by programmable dividers |
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| 16 | * to produce the needed clocks. The PLLs operate independently of one |
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| 17 | * another. |
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| 18 | */ |
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| 19 | #define EP93XX_EXT_CLK_RATE 14745600 |
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| 20 | #define EP93XX_EXT_RTC_RATE 32768 |
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| 21 | |
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| 22 | #define EP93XX_KEYTCHCLK_DIV4 (EP93XX_EXT_CLK_RATE / 4) |
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| 23 | #define EP93XX_KEYTCHCLK_DIV16 (EP93XX_EXT_CLK_RATE / 16) |
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| 24 | |
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| 25 | #endif |
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| 26 | |
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