From: Rahul Rameshbabu Date: Wed, 12 Oct 2022 00:28:10 +0000 (-0700) Subject: net/mlx5: Add adjphase function to support hardware-only offset control X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8e11a68e2e8abf6510508b75b49ec5953ca262b6;p=linux.git net/mlx5: Add adjphase function to support hardware-only offset control The adjtime function supports using hardware to set the clock offset when the delta was supported by the hardware. When the delta is not supported by the hardware, the driver handles adjusting the clock. The newly-introduced adjphase function is similar to the adjtime function, except it guarantees that a provided clock offset will be used directly by the hardware to adjust the PTP clock. When the range is not acceptable by the hardware, an error is returned. Signed-off-by: Rahul Rameshbabu Reviewed-by: Gal Pressman Reviewed-by: Tariq Toukan Signed-off-by: Saeed Mahameed --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c index 69318b1432688..ecdff26a22b04 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c @@ -326,6 +326,14 @@ static int mlx5_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) return 0; } +static int mlx5_ptp_adjphase(struct ptp_clock_info *ptp, s32 delta) +{ + if (delta < S16_MIN || delta > S16_MAX) + return -ERANGE; + + return mlx5_ptp_adjtime(ptp, delta); +} + static int mlx5_ptp_adjfreq_real_time(struct mlx5_core_dev *mdev, s32 freq) { u32 in[MLX5_ST_SZ_DW(mtutc_reg)] = {}; @@ -688,6 +696,7 @@ static const struct ptp_clock_info mlx5_ptp_clock_info = { .n_pins = 0, .pps = 0, .adjfine = mlx5_ptp_adjfine, + .adjphase = mlx5_ptp_adjphase, .adjtime = mlx5_ptp_adjtime, .gettimex64 = mlx5_ptp_gettimex, .settime64 = mlx5_ptp_settime,