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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
60 lines
No EOL
1.1 KiB
C
60 lines
No EOL
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2017-2022 Intel Corporation <www.intel.com>
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*
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*/
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#include <common.h>
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#include <init.h>
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#include <div64.h>
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#include <asm/io.h>
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#include <asm/arch/timer.h>
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/*
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* Timer initialization
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*/
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int timer_init(void)
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{
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#ifdef CONFIG_SPL_BUILD
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int enable = 0x3; /* timer enable + output signal masked */
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int loadval = ~0;
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/* enable system counter */
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writel(enable, SOCFPGA_GTIMER_SEC_ADDRESS);
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/* enable processor pysical counter */
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asm volatile("msr cntp_ctl_el0, %0" : : "r" (enable));
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asm volatile("msr cntp_tval_el0, %0" : : "r" (loadval));
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#endif
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return 0;
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}
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__always_inline u64 __get_time_stamp(void)
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{
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u64 cntpct;
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isb();
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asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct));
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return cntpct;
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}
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__always_inline uint64_t __usec_to_tick(unsigned long usec)
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{
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u64 tick = usec;
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u64 cntfrq;
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asm volatile("mrs %0, cntfrq_el0" : "=r" (cntfrq));
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tick *= cntfrq;
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do_div(tick, 1000000);
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return tick;
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}
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__always_inline void __udelay(unsigned long usec)
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{
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/* get current timestamp */
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u64 tmp = __get_time_stamp() + __usec_to_tick(usec);
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while (__get_time_stamp() < tmp + 1) /* loop till event */
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;
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} |