diff options
Diffstat (limited to 'drivers/net/dsa/sja1105/sja1105_ptp.c')
| -rw-r--r-- | drivers/net/dsa/sja1105/sja1105_ptp.c | 79 |
1 files changed, 46 insertions, 33 deletions
diff --git a/drivers/net/dsa/sja1105/sja1105_ptp.c b/drivers/net/dsa/sja1105/sja1105_ptp.c index 177134596458..1b90570b257b 100644 --- a/drivers/net/dsa/sja1105/sja1105_ptp.c +++ b/drivers/net/dsa/sja1105/sja1105_ptp.c @@ -24,7 +24,7 @@ * this hardware can do (but may be enough for some setups). Anything of higher * frequency than 1 Hz will be lost, since there is no timestamp FIFO. */ -#define SJA1105_EXTTS_INTERVAL (HZ / 4) +#define SJA1105_EXTTS_INTERVAL (HZ / 6) /* This range is actually +/- SJA1105_MAX_ADJ_PPB * divided by 1000 (ppb -> ppm) and with a 16-bit @@ -51,8 +51,8 @@ enum sja1105_ptp_clk_mode { PTP_SET_MODE = 0, }; -#define extts_to_data(d) \ - container_of((d), struct sja1105_ptp_data, extts_work) +#define extts_to_data(t) \ + container_of((t), struct sja1105_ptp_data, extts_timer) #define ptp_caps_to_data(d) \ container_of((d), struct sja1105_ptp_data, caps) #define ptp_data_to_sja1105(d) \ @@ -350,6 +350,30 @@ static int sja1105_ptpclkval_write(struct sja1105_private *priv, u64 ticks, ptp_sts); } +static void sja1105_extts_poll(struct sja1105_private *priv) +{ + struct sja1105_ptp_data *ptp_data = &priv->ptp_data; + const struct sja1105_regs *regs = priv->info->regs; + struct ptp_clock_event event; + u64 ptpsyncts = 0; + int rc; + + rc = sja1105_xfer_u64(priv, SPI_READ, regs->ptpsyncts, &ptpsyncts, + NULL); + if (rc < 0) + dev_err_ratelimited(priv->ds->dev, + "Failed to read PTPSYNCTS: %d\n", rc); + + if (ptpsyncts && ptp_data->ptpsyncts != ptpsyncts) { + event.index = 0; + event.type = PTP_CLOCK_EXTTS; + event.timestamp = ns_to_ktime(sja1105_ticks_to_ns(ptpsyncts)); + ptp_clock_event(ptp_data->clock, &event); + + ptp_data->ptpsyncts = ptpsyncts; + } +} + static long sja1105_rxtstamp_work(struct ptp_clock_info *ptp) { struct sja1105_ptp_data *ptp_data = ptp_caps_to_data(ptp); @@ -380,6 +404,9 @@ static long sja1105_rxtstamp_work(struct ptp_clock_info *ptp) netif_rx_ni(skb); } + if (ptp_data->extts_enabled) + sja1105_extts_poll(priv); + mutex_unlock(&ptp_data->lock); /* Don't restart */ @@ -595,36 +622,21 @@ static int sja1105_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) return rc; } -static void sja1105_ptp_extts_work(struct work_struct *work) +static void sja1105_ptp_extts_setup_timer(struct sja1105_ptp_data *ptp_data) { - struct delayed_work *dw = to_delayed_work(work); - struct sja1105_ptp_data *ptp_data = extts_to_data(dw); - struct sja1105_private *priv = ptp_data_to_sja1105(ptp_data); - const struct sja1105_regs *regs = priv->info->regs; - struct ptp_clock_event event; - u64 ptpsyncts = 0; - int rc; - - mutex_lock(&ptp_data->lock); - - rc = sja1105_xfer_u64(priv, SPI_READ, regs->ptpsyncts, &ptpsyncts, - NULL); - if (rc < 0) - dev_err_ratelimited(priv->ds->dev, - "Failed to read PTPSYNCTS: %d\n", rc); + unsigned long expires = ((jiffies / SJA1105_EXTTS_INTERVAL) + 1) * + SJA1105_EXTTS_INTERVAL; - if (ptpsyncts && ptp_data->ptpsyncts != ptpsyncts) { - event.index = 0; - event.type = PTP_CLOCK_EXTTS; - event.timestamp = ns_to_ktime(sja1105_ticks_to_ns(ptpsyncts)); - ptp_clock_event(ptp_data->clock, &event); + mod_timer(&ptp_data->extts_timer, expires); +} - ptp_data->ptpsyncts = ptpsyncts; - } +static void sja1105_ptp_extts_timer(struct timer_list *t) +{ + struct sja1105_ptp_data *ptp_data = extts_to_data(t); - mutex_unlock(&ptp_data->lock); + ptp_schedule_worker(ptp_data->clock, 0); - schedule_delayed_work(&ptp_data->extts_work, SJA1105_EXTTS_INTERVAL); + sja1105_ptp_extts_setup_timer(ptp_data); } static int sja1105_change_ptp_clk_pin_func(struct sja1105_private *priv, @@ -771,11 +783,12 @@ static int sja1105_extts_enable(struct sja1105_private *priv, if (rc) return rc; + priv->ptp_data.extts_enabled = on; + if (on) - schedule_delayed_work(&priv->ptp_data.extts_work, - SJA1105_EXTTS_INTERVAL); + sja1105_ptp_extts_setup_timer(&priv->ptp_data); else - cancel_delayed_work_sync(&priv->ptp_data.extts_work); + del_timer_sync(&priv->ptp_data.extts_timer); return 0; } @@ -858,7 +871,7 @@ int sja1105_ptp_clock_register(struct dsa_switch *ds) ptp_data->cmd.corrclk4ts = true; ptp_data->cmd.ptpclkadd = PTP_SET_MODE; - INIT_DELAYED_WORK(&ptp_data->extts_work, sja1105_ptp_extts_work); + timer_setup(&ptp_data->extts_timer, sja1105_ptp_extts_timer, 0); return sja1105_ptp_reset(ds); } @@ -871,7 +884,7 @@ void sja1105_ptp_clock_unregister(struct dsa_switch *ds) if (IS_ERR_OR_NULL(ptp_data->clock)) return; - cancel_delayed_work_sync(&ptp_data->extts_work); + del_timer_sync(&ptp_data->extts_timer); ptp_cancel_worker_sync(ptp_data->clock); skb_queue_purge(&ptp_data->skb_rxtstamp_queue); ptp_clock_unregister(ptp_data->clock); |