diff options
| author | Rengarajan S <rengarajan.s@microchip.com> | 2024-05-02 10:33:00 +0530 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2024-05-06 11:41:32 +0200 |
| commit | b1de3c0df7abc41dc41862c0b08386411f2799d7 (patch) | |
| tree | 7be00148bb92c7020d93356f565eed10defbd3a8 | |
| parent | cdc74c9d06e72addde01092d09f13bb86d3ed7d0 (diff) | |
net: microchip: lan743x: Reduce PTP timeout on HW failure
The PTP_CMD_CTL is a self clearing register which controls the PTP clock
values. In the current implementation driver waits for a duration of 20
sec in case of HW failure to clear the PTP_CMD_CTL register bit. This
timeout of 20 sec is very long to recognize a HW failure, as it is
typically cleared in one clock(<16ns). Hence reducing the timeout to 1 sec
would be sufficient to conclude if there is any HW failure observed. The
usleep_range will sleep somewhere between 1 msec to 20 msec for each
iteration. By setting the PTP_CMD_CTL_TIMEOUT_CNT to 50 the max timeout
is extended to 1 sec.
Signed-off-by: Rengarajan S <rengarajan.s@microchip.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240502050300.38689-1-rengarajan.s@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| -rw-r--r-- | drivers/net/ethernet/microchip/lan743x_ptp.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/microchip/lan743x_ptp.h | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/microchip/lan743x_ptp.c b/drivers/net/ethernet/microchip/lan743x_ptp.c index 80d9680b3830..dcea6652d56d 100644 --- a/drivers/net/ethernet/microchip/lan743x_ptp.c +++ b/drivers/net/ethernet/microchip/lan743x_ptp.c @@ -58,7 +58,7 @@ int lan743x_gpio_init(struct lan743x_adapter *adapter) static void lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter *adapter, u32 bit_mask) { - int timeout = 1000; + int timeout = PTP_CMD_CTL_TIMEOUT_CNT; u32 data = 0; while (timeout && diff --git a/drivers/net/ethernet/microchip/lan743x_ptp.h b/drivers/net/ethernet/microchip/lan743x_ptp.h index e26d4eff7133..0d29914cd460 100644 --- a/drivers/net/ethernet/microchip/lan743x_ptp.h +++ b/drivers/net/ethernet/microchip/lan743x_ptp.h @@ -21,6 +21,7 @@ #define LAN743X_PTP_N_EXTTS 4 #define LAN743X_PTP_N_PPS 0 #define PCI11X1X_PTP_IO_MAX_CHANNELS 8 +#define PTP_CMD_CTL_TIMEOUT_CNT 50 struct lan743x_adapter; |