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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/mips/kernel/csrc-bcm1480.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | arch/mips/kernel/csrc-bcm1480.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/mips/kernel/csrc-bcm1480.c b/arch/mips/kernel/csrc-bcm1480.c new file mode 100644 index 000000000..6c18a138f --- /dev/null +++ b/arch/mips/kernel/csrc-bcm1480.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2000,2001,2004 Broadcom Corporation + */ +#include <linux/clocksource.h> +#include <linux/sched_clock.h> + +#include <asm/addrspace.h> +#include <asm/io.h> +#include <asm/time.h> + +#include <asm/sibyte/bcm1480_regs.h> +#include <asm/sibyte/sb1250_regs.h> +#include <asm/sibyte/bcm1480_int.h> +#include <asm/sibyte/bcm1480_scd.h> + +#include <asm/sibyte/sb1250.h> + +static u64 bcm1480_hpt_read(struct clocksource *cs) +{ + return (u64) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT)); +} + +struct clocksource bcm1480_clocksource = { + .name = "zbbus-cycles", + .rating = 200, + .read = bcm1480_hpt_read, + .mask = CLOCKSOURCE_MASK(64), + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static u64 notrace sb1480_read_sched_clock(void) +{ + return __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT)); +} + +void __init sb1480_clocksource_init(void) +{ + struct clocksource *cs = &bcm1480_clocksource; + unsigned int plldiv; + unsigned long zbbus; + + plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG))); + zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000); + clocksource_register_hz(cs, zbbus); + + sched_clock_register(sb1480_read_sched_clock, 64, zbbus); +} |