diff options
| author | Meghana Malladi <m-malladi@ti.com> | 2025-03-04 13:57:53 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-03-07 04:47:01 +0300 |
| commit | 220cb1be647a7ca4e60241405c66f8f612c9b046 (patch) | |
| tree | 2bd86c096c01cc0c3871b31d6d79c38a926b7eb0 | |
| parent | e5b456a14215e3c0e84844c2926861b972e03632 (diff) | |
| download | linux-220cb1be647a7ca4e60241405c66f8f612c9b046.tar.xz | |
net: ti: icss-iep: Add phase offset configuration for perout signal
icss_iep_perout_enable_hw() is a common function for generating
both pps and perout signals. When enabling pps, the application needs
to only pass enable/disable argument, whereas for perout it supports
different flags to configure the signal.
In case the app passes a valid phase offset value, the signal should
start toggling after that phase offset, else start immediately or
as soon as possible. ICSS_IEP_SYNC_START_REG register take number of
clock cycles to wait before starting the signal after activation time.
Set appropriate value to this register to support phase offset.
Signed-off-by: Meghana Malladi <m-malladi@ti.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20250304105753.1552159-3-m-malladi@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/ti/icssg/icss_iep.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/net/ethernet/ti/icssg/icss_iep.c b/drivers/net/ethernet/ti/icssg/icss_iep.c index 2981c19c48b1..b4a34c57b7b4 100644 --- a/drivers/net/ethernet/ti/icssg/icss_iep.c +++ b/drivers/net/ethernet/ti/icssg/icss_iep.c @@ -407,6 +407,7 @@ static int icss_iep_perout_enable_hw(struct icss_iep *iep, struct ptp_perout_request *req, int on) { struct timespec64 ts; + u64 ns_start; u64 ns_width; int ret; u64 cmp; @@ -416,6 +417,14 @@ static int icss_iep_perout_enable_hw(struct icss_iep *iep, ts.tv_nsec = req->on.nsec; ns_width = timespec64_to_ns(&ts); + if (req->flags & PTP_PEROUT_PHASE) { + ts.tv_sec = req->phase.sec; + ts.tv_nsec = req->phase.nsec; + ns_start = timespec64_to_ns(&ts); + } else { + ns_start = 0; + } + if (iep->ops && iep->ops->perout_enable) { ret = iep->ops->perout_enable(iep->clockops_data, req, on, &cmp); if (ret) @@ -430,7 +439,8 @@ static int icss_iep_perout_enable_hw(struct icss_iep *iep, regmap_write(iep->map, ICSS_IEP_SYNC_PWIDTH_REG, div_u64(ns_width, iep->def_inc)); regmap_write(iep->map, ICSS_IEP_SYNC0_PERIOD_REG, 0); - regmap_write(iep->map, ICSS_IEP_SYNC_START_REG, 0); + regmap_write(iep->map, ICSS_IEP_SYNC_START_REG, + div_u64(ns_start, iep->def_inc)); regmap_write(iep->map, ICSS_IEP_SYNC_CTRL_REG, 0); /* one-shot mode */ /* Enable CMP 1 */ regmap_update_bits(iep->map, ICSS_IEP_CMP_CFG_REG, @@ -457,6 +467,8 @@ static int icss_iep_perout_enable_hw(struct icss_iep *iep, regmap_write(iep->map, ICSS_IEP_SYNC_PWIDTH_REG, div_u64(ns_width, iep->def_inc)); + regmap_write(iep->map, ICSS_IEP_SYNC_START_REG, + div_u64(ns_start, iep->def_inc)); /* Enable Sync in single shot mode */ regmap_write(iep->map, ICSS_IEP_SYNC_CTRL_REG, IEP_SYNC_CTRL_SYNC_N_EN(0) | IEP_SYNC_CTRL_SYNC_EN); @@ -487,7 +499,8 @@ static int icss_iep_perout_enable(struct icss_iep *iep, int ret = 0; /* Reject requests with unsupported flags */ - if (req->flags & ~PTP_PEROUT_DUTY_CYCLE) + if (req->flags & ~(PTP_PEROUT_DUTY_CYCLE | + PTP_PEROUT_PHASE)) return -EOPNOTSUPP; mutex_lock(&iep->ptp_clk_mutex); @@ -588,6 +601,7 @@ static int icss_iep_pps_enable(struct icss_iep *iep, int on) if (on) { ns = icss_iep_gettime(iep, NULL); ts = ns_to_timespec64(ns); + rq.perout.flags = 0; rq.perout.period.sec = 1; rq.perout.period.nsec = 0; rq.perout.start.sec = ts.tv_sec + 2; |