mips/mti-malta/malta-time.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * Carsten Langgaard, carstenl@mips.com
4  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
6  * Setting up the clock on the MIPS boards.
28 #include <asm/mc146818-time.h>
30 #include <asm/mips-cps.h>
32 #include <asm/mips-boards/generic.h>
33 #include <asm/mips-boards/maltaint.h>
54 	freq -= freq % (amount*2);  in freqround()
59  * Estimate CPU and GIC frequencies.
106 	secs = secs2 - secs1;  in estimate_frequencies()
110 	count -= start;  in estimate_frequencies()
115 		giccount = div_u64(giccount - gicstart, secs);  in estimate_frequencies()
122 	ts->tv_sec = mc146818_get_cmos_time();  in read_persistent_clock64()
123 	ts->tv_nsec = 0;  in read_persistent_clock64()
129 	 * Some cores claim the FDC is routable through the GIC, but it doesn't  in get_c0_fdc_int()
135 		return -1;  in get_c0_fdc_int()
139 		return -1;  in get_c0_fdc_int()
145 		return -1;  in get_c0_fdc_int()
158 		mips_cpu_perf_irq = -1;  in get_c0_perfcount_int()
198 	.name = "clock-frequency",
209 	node = of_find_compatible_node(NULL, NULL, "mti,gic-timer");  in update_gic_frequency_dt()
211 		pr_err("mti,gic-timer device node not found\n");  in update_gic_frequency_dt()
216 		pr_err("error updating gic frequency property\n");  in update_gic_frequency_dt()
246 		printk("GIC frequency %d.%02d MHz\n", freq/1000000,  in plat_time_init()