1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Joshua Henderson <joshua.henderson@microchip.com>
4 * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
5 */
6 #include <linux/clocksource.h>
7 #include <linux/init.h>
8 #include <linux/irqdomain.h>
9 #include <linux/of.h>
10 #include <linux/of_clk.h>
11 #include <linux/of_irq.h>
12
13 #include <asm/time.h>
14
15 #include "pic32mzda.h"
16
17 static const struct of_device_id pic32_infra_match[] = {
18 { .compatible = "microchip,pic32mzda-infra", },
19 { },
20 };
21
22 #define DEFAULT_CORE_TIMER_INTERRUPT 0
23
24 static unsigned int pic32_xlate_core_timer_irq(void)
25 {
26 struct device_node *node;
27 unsigned int irq;
28
29 node = of_find_matching_node(NULL, pic32_infra_match);
30
31 if (WARN_ON(!node))
32 goto default_map;
33
34 irq = irq_of_parse_and_map(node, 0);
35
36 of_node_put(node);
37
38 if (!irq)
39 goto default_map;
40
41 return irq;
42
43 default_map:
44
45 return irq_create_mapping(NULL, DEFAULT_CORE_TIMER_INTERRUPT);
46 }
47
48 unsigned int get_c0_compare_int(void)
49 {
50 return pic32_xlate_core_timer_irq();
51 }
52
53 void __init plat_time_init(void)
54 {
55 unsigned long rate = pic32_get_pbclk(7);
56
57 of_clk_init(NULL);
58
59 pr_info("CPU Clock: %ldMHz\n", rate / 1000000);
60 mips_hpt_frequency = rate / 2;
61
62 timer_probe();
63 }
64
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