[PATCH net-next v6 2/6] ptp: clockmatrix: set write phase timer to 0 when not in PCW mode

Min Li
2023-11-30T18:47:01Z

In order for phase pull-in to work, write phase timer shall be 0
when not in write phase mode.

Signed-off-by: Min Li <min.li.xe@renesas.com>
---
drivers/ptp/ptp_clockmatrix.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/drivers/ptp/ptp_clockmatrix.c b/drivers/ptp/ptp_clockmatrix.c
index f8556627befa..6d55da54e496 100644
--- a/drivers/ptp/ptp_clockmatrix.c
+++ b/drivers/ptp/ptp_clockmatrix.c
@@ -1396,6 +1396,20 @@ static int idtcm_set_pll_mode(struct idtcm_channel *channel,
struct idtcm *idtcm = channel->idtcm;
int err;
u8 dpll_mode;
+ u8 timeout = 0;
+
+ /* Setup WF/WP timer for phase pull-in to work correctly */
+ err = idtcm_write(idtcm, channel->dpll_n, DPLL_WF_TIMER,
+ &timeout, sizeof(timeout));
+ if (err)
+ return err;
+
+ if (mode == PLL_MODE_WRITE_PHASE)
+ timeout = 160;
+ err = idtcm_write(idtcm, channel->dpll_n, DPLL_WP_TIMER,
+ &timeout, sizeof(timeout));
+ if (err)
+ return err;

err = idtcm_read(idtcm, channel->dpll_n,
IDTCM_FW_REG(idtcm->fw_ver, V520, DPLL_MODE),
--
2.39.2