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| author | Ley Foon Tan <leyfoon.tan@starfivetech.com> | 2024-03-07 01:23:30 +0800 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2024-03-13 12:08:59 +0100 |
| commit | 8248ca30ef89f9cc74ace62ae1b9a22b5f16736c (patch) | |
| tree | 6c773ccc00cdb6cbd2a49e64a9b282776e245c3e /drivers/clocksource | |
| parent | c819dbd078321f948101ef7a19f1e171164bb3cf (diff) | |
| download | linux-8248ca30ef89f9cc74ace62ae1b9a22b5f16736c.tar.gz linux-8248ca30ef89f9cc74ace62ae1b9a22b5f16736c.tar.bz2 linux-8248ca30ef89f9cc74ace62ae1b9a22b5f16736c.zip | |
clocksource/drivers/timer-riscv: Clear timer interrupt on timer initialization
In the RISC-V specification, the stimecmp register doesn't have a default
value. To prevent the timer interrupt from being triggered during timer
initialization, clear the timer interrupt by writing stimecmp with a
maximum value.
Fixes: 9f7a8ff6391f ("RISC-V: Prefer sstc extension if available")
Cc: <stable@vger.kernel.org>
Signed-off-by: Ley Foon Tan <leyfoon.tan@starfivetech.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
Tested-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20240306172330.255844-1-leyfoon.tan@starfivetech.com
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/timer-riscv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c index e66dcbd66566..79bb9a98baa7 100644 --- a/drivers/clocksource/timer-riscv.c +++ b/drivers/clocksource/timer-riscv.c @@ -108,6 +108,9 @@ static int riscv_timer_starting_cpu(unsigned int cpu) { struct clock_event_device *ce = per_cpu_ptr(&riscv_clock_event, cpu); + /* Clear timer interrupt */ + riscv_clock_event_stop(); + ce->cpumask = cpumask_of(cpu); ce->irq = riscv_clock_event_irq; if (riscv_timer_cannot_wake_cpu) |