1/*
 2 * Copyright (C) 2000,2001,2004 Broadcom Corporation
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of the GNU General Public License
 6 * as published by the Free Software Foundation; either version 2
 7 * of the License, or (at your option) any later version.
 8 *
 9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 */
14#include <linux/clocksource.h>
15#include <linux/sched_clock.h>
16
17#include <asm/addrspace.h>
18#include <asm/io.h>
19#include <asm/time.h>
20
21#include <asm/sibyte/bcm1480_regs.h>
22#include <asm/sibyte/sb1250_regs.h>
23#include <asm/sibyte/bcm1480_int.h>
24#include <asm/sibyte/bcm1480_scd.h>
25
26#include <asm/sibyte/sb1250.h>
27
28static cycle_t bcm1480_hpt_read(struct clocksource *cs)
29{
30	return (cycle_t) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
31}
32
33struct clocksource bcm1480_clocksource = {
34	.name	= "zbbus-cycles",
35	.rating = 200,
36	.read	= bcm1480_hpt_read,
37	.mask	= CLOCKSOURCE_MASK(64),
38	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
39};
40
41static u64 notrace sb1480_read_sched_clock(void)
42{
43	return __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
44}
45
46void __init sb1480_clocksource_init(void)
47{
48	struct clocksource *cs = &bcm1480_clocksource;
49	unsigned int plldiv;
50	unsigned long zbbus;
51
52	plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
53	zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000);
54	clocksource_register_hz(cs, zbbus);
55
56	sched_clock_register(sb1480_read_sched_clock, 64, zbbus);
57}

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright (C) 2000,2001,2004 Broadcom Corporation
 
 
 
 
 
 
 
 
 
 
 4 */
 5#include <linux/clocksource.h>
 6#include <linux/sched_clock.h>
 7
 8#include <asm/addrspace.h>
 9#include <asm/io.h>
10#include <asm/time.h>
11
12#include <asm/sibyte/bcm1480_regs.h>
13#include <asm/sibyte/sb1250_regs.h>
14#include <asm/sibyte/bcm1480_int.h>
15#include <asm/sibyte/bcm1480_scd.h>
16
17#include <asm/sibyte/sb1250.h>
18
19static u64 bcm1480_hpt_read(struct clocksource *cs)
20{
21	return (u64) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
22}
23
24struct clocksource bcm1480_clocksource = {
25	.name	= "zbbus-cycles",
26	.rating = 200,
27	.read	= bcm1480_hpt_read,
28	.mask	= CLOCKSOURCE_MASK(64),
29	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
30};
31
32static u64 notrace sb1480_read_sched_clock(void)
33{
34	return __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
35}
36
37void __init sb1480_clocksource_init(void)
38{
39	struct clocksource *cs = &bcm1480_clocksource;
40	unsigned int plldiv;
41	unsigned long zbbus;
42
43	plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
44	zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000);
45	clocksource_register_hz(cs, zbbus);
46
47	sched_clock_register(sb1480_read_sched_clock, 64, zbbus);
48}