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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/riscv/kernel/time.c | |
parent | Initial commit. (diff) | |
download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/riscv/kernel/time.c')
-rw-r--r-- | arch/riscv/kernel/time.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/riscv/kernel/time.c b/arch/riscv/kernel/time.c new file mode 100644 index 000000000..15f4ab40e --- /dev/null +++ b/arch/riscv/kernel/time.c @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2012 Regents of the University of California + * Copyright (C) 2017 SiFive + * + * 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, version 2. + * + * 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. + */ + +#include <linux/of_clk.h> +#include <linux/clocksource.h> +#include <linux/delay.h> +#include <asm/sbi.h> + +unsigned long riscv_timebase; + +void __init time_init(void) +{ + struct device_node *cpu; + u32 prop; + + cpu = of_find_node_by_path("/cpus"); + if (!cpu || of_property_read_u32(cpu, "timebase-frequency", &prop)) + panic(KERN_WARNING "RISC-V system with no 'timebase-frequency' in DTS\n"); + riscv_timebase = prop; + + lpj_fine = riscv_timebase / HZ; + + of_clk_init(NULL); + timer_probe(); +} |