dpll: zl3073x: scale poll interval proportionally to timeout

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Replace the fixed 10 us poll sleep in zl3073x_poll_zero_u8() with
timeout_us / 50, scaling the sleep interval proportionally to the
timeout for all callers.

Testing showed that existing callers (mailbox, HWREG, DF read,
frequency measurement and phase error polls with 25-50 ms timeouts)
typically completed in low hundreds of sleep cycles with the fixed
10 us interval. With the scaled interval the cycle count drops to
single digits. The longer PTP-related timeouts (up to 3000 ms for
phase step) added in the following patches benefit most, avoiding
on the order of 10^5 bus transactions per wait.

Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Link: https://patch.msgid.link/20260814082656.306534-2-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Ivan Vecera 2026-08-14 10:26:54 +02:00 • committed by Jakub Kicinski

parent 25b00c01fe

commit c364618254

1 changed files with 2 additions and 2 deletions

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drivers/dpll/zl3073x/core.c

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