[PATCH 9/9] ptp: switch to using FIELD_GET_SIGNED()

Yury Norov
2026-04-17T17:37:17Z

Switch from sign_extend32(FIELD_GET()) to the dedicated
FIELD_GET_SIGNED() and don't calculate the fields length explicitly.

Signed-off-by: Yury Norov <ynorov@nvidia.com>
---
drivers/ptp/ptp_fc3.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/ptp/ptp_fc3.c b/drivers/ptp/ptp_fc3.c
index 70002500170e..f0e000428a3f 100644
--- a/drivers/ptp/ptp_fc3.c
+++ b/drivers/ptp/ptp_fc3.c
@@ -55,8 +55,8 @@ static s64 tdc_meas2offset(struct idtfc3 *idtfc3, u64 meas_read)
{
s64 coarse, fine;

- fine = sign_extend64(FIELD_GET(FINE_MEAS_MASK, meas_read), 12);
- coarse = sign_extend64(FIELD_GET(COARSE_MEAS_MASK, meas_read), (39 - 13));
+ fine = FIELD_GET_SIGNED(FINE_MEAS_MASK, meas_read);
+ coarse = FIELD_GET_SIGNED(COARSE_MEAS_MASK, meas_read);

fine = div64_s64(fine * NSEC_PER_SEC, idtfc3->tdc_apll_freq * 62LL);
coarse = div64_s64(coarse * NSEC_PER_SEC, idtfc3->time_ref_freq);
--
2.51.0