ptp: Add adjust_phase to ptp_clock_caps capability.

Add adjust_phase to ptp_clock_caps capability to allow
user to query if a PHC driver supports adjust phase with
ioctl PTP_CLOCK_GETCAPS command.

Signed-off-by: Vincent Cheng <vincent.cheng.xh@renesas.com>
Reviewed-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
index 93d574f..375cd6e 100644 (file)
--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -136,6 +136,7 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
                caps.pps = ptp->info->pps;
                caps.n_pins = ptp->info->n_pins;
                caps.cross_timestamping = ptp->info->getcrosststamp != NULL;
+               caps.adjust_phase = ptp->info->adjphase != NULL;
                if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
                        err = -EFAULT;
                break;

diff --git a/include/uapi/linux/ptp_clock.h b/include/uapi/linux/ptp_clock.h
index 9dc9d00..ff070aa 100644 (file)
--- a/include/uapi/linux/ptp_clock.h
+++ b/include/uapi/linux/ptp_clock.h
@@ -89,7 +89,9 @@ struct ptp_clock_caps {
        int n_pins;    /* Number of input/output pins. */
        /* Whether the clock supports precise system-device cross timestamps */
        int cross_timestamping;
-       int rsv[13];   /* Reserved for future use. */
+       /* Whether the clock supports adjust phase */
+       int adjust_phase;
+       int rsv[12];   /* Reserved for future use. */
 };
 
 struct ptp_extts_request {

diff --git a/tools/testing/selftests/ptp/testptp.c b/tools/testing/selftests/ptp/testptp.c
index c0dd102..da7a9dd 100644 (file)
--- a/tools/testing/selftests/ptp/testptp.c
+++ b/tools/testing/selftests/ptp/testptp.c
@@ -269,14 +269,16 @@ int main(int argc, char *argv[])
                               "  %d programmable periodic signals\n"
                               "  %d pulse per second\n"
                               "  %d programmable pins\n"
-                              "  %d cross timestamping\n",
+                              "  %d cross timestamping\n"
+                              "  %d adjust_phase\n",
                               caps.max_adj,
                               caps.n_alarm,
                               caps.n_ext_ts,
                               caps.n_per_out,
                               caps.pps,
                               caps.n_pins,
-                              caps.cross_timestamping);
+                              caps.cross_timestamping,
+                              caps.adjust_phase);
                }
        }