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Diffstat (limited to 'include/asm-arm/arch-ns9xxx/clock.h')
-rw-r--r-- | include/asm-arm/arch-ns9xxx/clock.h | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/include/asm-arm/arch-ns9xxx/clock.h b/include/asm-arm/arch-ns9xxx/clock.h deleted file mode 100644 index b943d3a92a1d..000000000000 --- a/include/asm-arm/arch-ns9xxx/clock.h +++ /dev/null @@ -1,71 +0,0 @@ -/* - * include/asm-arm/arch-ns9xxx/clock.h - * - * Copyright (C) 2007 by Digi International Inc. - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published by - * the Free Software Foundation. - */ -#ifndef __ASM_ARCH_CLOCK_H -#define __ASM_ARCH_CLOCK_H - -#include <asm/arch-ns9xxx/regs-sys.h> - -#define CRYSTAL 29491200 /* Hz */ - -/* The HRM calls this value f_vco */ -static inline u32 ns9xxx_systemclock(void) __attribute__((const)); -static inline u32 ns9xxx_systemclock(void) -{ - u32 pll = __raw_readl(SYS_PLL); - - /* - * The system clock should be a multiple of HZ * TIMERCLOCKSELECT (in - * time.c). - * - * The following values are given: - * - TIMERCLOCKSELECT == 2^i for an i in {0 .. 6} - * - CRYSTAL == 29491200 == 2^17 * 3^2 * 5^2 - * - ND in {0 .. 31} - * - FS in {0 .. 3} - * - * Assuming the worst, we consider: - * - TIMERCLOCKSELECT == 64 - * - ND == 0 - * - FS == 3 - * - * So HZ should be a divisor of: - * (CRYSTAL * (ND + 1) >> FS) / TIMERCLOCKSELECT - * == (2^17 * 3^2 * 5^2 * 1 >> 3) / 64 - * == 2^8 * 3^2 * 5^2 - * == 57600 - * - * Currently HZ is defined to be 100 for this platform. - * - * Fine. - */ - return CRYSTAL * (REGGETIM(pll, SYS_PLL, ND) + 1) - >> REGGETIM(pll, SYS_PLL, FS); -} - -static inline u32 ns9xxx_cpuclock(void) __attribute__((const)); -static inline u32 ns9xxx_cpuclock(void) -{ - return ns9xxx_systemclock() / 2; -} - -static inline u32 ns9xxx_ahbclock(void) __attribute__((const)); -static inline u32 ns9xxx_ahbclock(void) -{ - return ns9xxx_systemclock() / 4; -} - -static inline u32 ns9xxx_bbusclock(void) __attribute__((const)); -static inline u32 ns9xxx_bbusclock(void) -{ - return ns9xxx_systemclock() / 8; -} - -#endif /* ifndef __ASM_ARCH_CLOCK_H */ |