[RFC PATCH 2/2] net: ethernet: ti: am65-cpts: Add support to configure GenF signal for CPTS
From: Chintan Vankar <hidden>
Date: 2025-02-05 16:01:47
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Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add support to configure GenFx (periodic signal generator) function which can be used by Timesync Interrupt Router to map it with CPTS_HWy_TS_PUSH, in order to generate timestamps at 1 second intervals. This configuration is optional for CPTS module. Signed-off-by: Chintan Vankar <redacted> --- drivers/net/ethernet/ti/am65-cpts.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/drivers/net/ethernet/ti/am65-cpts.c b/drivers/net/ethernet/ti/am65-cpts.c
index 59d6ab989c55..c32e6c60561d 100644
--- a/drivers/net/ethernet/ti/am65-cpts.c
+++ b/drivers/net/ethernet/ti/am65-cpts.c@@ -171,6 +171,7 @@ struct am65_cpts { u32 genf_num; u32 ts_add_val; int irq; + int genf_irq; struct mutex ptp_clk_lock; /* PHC access sync */ u64 timestamp; u32 genf_enable;
@@ -409,6 +410,11 @@ static irqreturn_t am65_cpts_interrupt(int irq, void *dev_id) return IRQ_HANDLED; } +static irqreturn_t am65_cpts_genf_interrupt(int irq, void *dev_id) +{ + return IRQ_HANDLED; +} + /* PTP clock operations */ static int am65_cpts_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) {
@@ -1216,6 +1222,21 @@ struct am65_cpts *am65_cpts_create(struct device *dev, void __iomem *regs, goto reset_ptpclk; } + /* + * This API is used by Timesync Router's driver code to map + * GenFx output of CPTS module with HWx_TS_PUSH input to generate PPS + * signal. + */ + cpts->genf_irq = of_irq_get_byname(node, "genf"); + if (cpts->genf_irq > 0) { + ret = devm_request_threaded_irq(dev, cpts->genf_irq, NULL, + am65_cpts_genf_interrupt, + 0, dev_name(dev), cpts); + if (ret < 0) + dev_dbg(cpts->dev, "GENF output will not be routed via Time Sync Interrupt Router + %d\n", ret); + } + dev_info(dev, "CPTS ver 0x%08x, freq:%u, add_val:%u pps:%d\n", am65_cpts_read32(cpts, idver), cpts->refclk_freq, cpts->ts_add_val, cpts->pps_present);
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2.34.1