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The SI unit of frequency is Hertz, named after Heinrich Hertz, and is given the symbol "Hz" to denote this. "hz" is not the unit of frequency, and is in fact meaningless. Fix arch/arm to correctly use "Hz", thereby acknowledging Heinrich Hertz' contribution to the modern world. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
127 lines
2.7 KiB
C
127 lines
2.7 KiB
C
#ifndef _IOP13XX_TIME_H_
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#define _IOP13XX_TIME_H_
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#include <mach/irqs.h>
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#define IRQ_IOP_TIMER0 IRQ_IOP13XX_TIMER0
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#define IOP_TMR_EN 0x02
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#define IOP_TMR_RELOAD 0x04
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#define IOP_TMR_PRIVILEGED 0x08
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#define IOP_TMR_RATIO_1_1 0x00
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#define IOP13XX_XSI_FREQ_RATIO_MASK (3 << 19)
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#define IOP13XX_XSI_FREQ_RATIO_2 (0 << 19)
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#define IOP13XX_XSI_FREQ_RATIO_3 (1 << 19)
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#define IOP13XX_XSI_FREQ_RATIO_4 (2 << 19)
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#define IOP13XX_CORE_FREQ_MASK (7 << 16)
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#define IOP13XX_CORE_FREQ_600 (0 << 16)
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#define IOP13XX_CORE_FREQ_667 (1 << 16)
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#define IOP13XX_CORE_FREQ_800 (2 << 16)
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#define IOP13XX_CORE_FREQ_933 (3 << 16)
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#define IOP13XX_CORE_FREQ_1000 (4 << 16)
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#define IOP13XX_CORE_FREQ_1200 (5 << 16)
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void iop_init_time(unsigned long tickrate);
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static inline unsigned long iop13xx_core_freq(void)
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{
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unsigned long freq = __raw_readl(IOP13XX_PROCESSOR_FREQ);
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freq &= IOP13XX_CORE_FREQ_MASK;
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switch (freq) {
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case IOP13XX_CORE_FREQ_600:
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return 600000000;
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case IOP13XX_CORE_FREQ_667:
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return 667000000;
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case IOP13XX_CORE_FREQ_800:
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return 800000000;
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case IOP13XX_CORE_FREQ_933:
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return 933000000;
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case IOP13XX_CORE_FREQ_1000:
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return 1000000000;
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case IOP13XX_CORE_FREQ_1200:
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return 1200000000;
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default:
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printk("%s: warning unknown frequency, defaulting to 800MHz\n",
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__func__);
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}
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return 800000000;
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}
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static inline unsigned long iop13xx_xsi_bus_ratio(void)
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{
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unsigned long ratio = __raw_readl(IOP13XX_PROCESSOR_FREQ);
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ratio &= IOP13XX_XSI_FREQ_RATIO_MASK;
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switch (ratio) {
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case IOP13XX_XSI_FREQ_RATIO_2:
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return 2;
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case IOP13XX_XSI_FREQ_RATIO_3:
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return 3;
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case IOP13XX_XSI_FREQ_RATIO_4:
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return 4;
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default:
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printk("%s: warning unknown ratio, defaulting to 2\n",
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__func__);
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}
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return 2;
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}
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static inline u32 read_tmr0(void)
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{
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u32 val;
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asm volatile("mrc p6, 0, %0, c0, c9, 0" : "=r" (val));
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return val;
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}
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static inline void write_tmr0(u32 val)
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{
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asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (val));
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}
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static inline void write_tmr1(u32 val)
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{
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asm volatile("mcr p6, 0, %0, c1, c9, 0" : : "r" (val));
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}
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static inline u32 read_tcr0(void)
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{
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u32 val;
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asm volatile("mrc p6, 0, %0, c2, c9, 0" : "=r" (val));
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return val;
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}
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static inline void write_tcr0(u32 val)
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{
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asm volatile("mcr p6, 0, %0, c2, c9, 0" : : "r" (val));
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}
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static inline u32 read_tcr1(void)
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{
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u32 val;
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asm volatile("mrc p6, 0, %0, c3, c9, 0" : "=r" (val));
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return val;
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}
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static inline void write_tcr1(u32 val)
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{
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asm volatile("mcr p6, 0, %0, c3, c9, 0" : : "r" (val));
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}
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static inline void write_trr0(u32 val)
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{
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asm volatile("mcr p6, 0, %0, c4, c9, 0" : : "r" (val));
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}
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static inline void write_trr1(u32 val)
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{
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asm volatile("mcr p6, 0, %0, c5, c9, 0" : : "r" (val));
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}
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static inline void write_tisr(u32 val)
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{
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asm volatile("mcr p6, 0, %0, c6, c9, 0" : : "r" (val));
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}
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#endif
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