c942fddf87
Based on 3 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2000,2001,2004 Broadcom Corporation
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*/
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#include <linux/clocksource.h>
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#include <linux/sched_clock.h>
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#include <asm/addrspace.h>
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#include <asm/io.h>
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#include <asm/time.h>
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#include <asm/sibyte/bcm1480_regs.h>
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#include <asm/sibyte/sb1250_regs.h>
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#include <asm/sibyte/bcm1480_int.h>
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#include <asm/sibyte/bcm1480_scd.h>
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#include <asm/sibyte/sb1250.h>
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static u64 bcm1480_hpt_read(struct clocksource *cs)
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{
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return (u64) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
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}
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struct clocksource bcm1480_clocksource = {
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.name = "zbbus-cycles",
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.rating = 200,
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.read = bcm1480_hpt_read,
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.mask = CLOCKSOURCE_MASK(64),
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.flags = CLOCK_SOURCE_IS_CONTINUOUS,
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};
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static u64 notrace sb1480_read_sched_clock(void)
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{
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return __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
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}
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void __init sb1480_clocksource_init(void)
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{
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struct clocksource *cs = &bcm1480_clocksource;
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unsigned int plldiv;
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unsigned long zbbus;
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plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
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zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000);
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clocksource_register_hz(cs, zbbus);
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sched_clock_register(sb1480_read_sched_clock, 64, zbbus);
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}
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