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}

 
 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 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17 */
18#include <linux/clocksource.h>
 
19
20#include <asm/addrspace.h>
21#include <asm/io.h>
22#include <asm/time.h>
23
24#include <asm/sibyte/bcm1480_regs.h>
25#include <asm/sibyte/sb1250_regs.h>
26#include <asm/sibyte/bcm1480_int.h>
27#include <asm/sibyte/bcm1480_scd.h>
28
29#include <asm/sibyte/sb1250.h>
30
31static cycle_t bcm1480_hpt_read(struct clocksource *cs)
32{
33	return (cycle_t) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
34}
35
36struct clocksource bcm1480_clocksource = {
37	.name	= "zbbus-cycles",
38	.rating	= 200,
39	.read	= bcm1480_hpt_read,
40	.mask	= CLOCKSOURCE_MASK(64),
41	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
42};
43
 
 
 
 
 
44void __init sb1480_clocksource_init(void)
45{
46	struct clocksource *cs = &bcm1480_clocksource;
47	unsigned int plldiv;
48	unsigned long zbbus;
49
50	plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
51	zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000);
52	clocksource_register_hz(cs, zbbus);
 
 
53}