On Fri, Mar 20, 2020 at 06:37:26PM +0800, Yangbo Lu wrote:

Support 4 programmable pins for only one function periodic
signal for now.

For now?

+static int ocelot_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin,
+			     enum ptp_pin_function func, unsigned int chan)
+{
+	switch (func) {
+	case PTP_PF_NONE:
+	case PTP_PF_PEROUT:
+		break;

If the functions cannot be changed, then supporting the
PTP_PIN_SETFUNC ioctl does not make sense!

+	case PTP_PF_EXTTS:
+	case PTP_PF_PHYSYNC:
+		return -1;
+	}
+	return 0;
+}

Thanks,
Richard