linux-kernel - [PATCH v3 net-next 2/7] ptp: ptp_clockmatrix: Add alignment of 1 PPS to idtcm_perout

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Message-ID: <1613540538-23792-3-git-send-email-vincent.cheng.xh@renesas.com>
Date:   Wed, 17 Feb 2021 00:42:13 -0500
From:   <vincent.cheng.xh@...esas.com>
To:     <richardcochran@...il.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Vincent Cheng <vincent.cheng.xh@...esas.com>
Subject: [PATCH v3 net-next 2/7] ptp: ptp_clockmatrix: Add alignment of 1 PPS to idtcm_perout_enable.

From: Vincent Cheng <vincent.cheng.xh@...esas.com>

When enabling output using PTP_CLK_REQ_PEROUT, need to align the output
clock to the internal 1 PPS clock.

Signed-off-by: Vincent Cheng <vincent.cheng.xh@...esas.com>
Acked-by: Richard Cochran <richardcochran@...il.com>
---
 drivers/ptp/ptp_clockmatrix.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/ptp/ptp_clockmatrix.c b/drivers/ptp/ptp_clockmatrix.c
index 9bfd32b..f597e4f 100644
--- a/drivers/ptp/ptp_clockmatrix.c
+++ b/drivers/ptp/ptp_clockmatrix.c
@@ -1389,13 +1389,23 @@ static int idtcm_perout_enable(struct idtcm_channel *channel,
 			       bool enable,
 			       struct ptp_perout_request *perout)
 {
+	struct idtcm *idtcm = channel->idtcm;
 	unsigned int flags = perout->flags;
+	struct timespec64 ts = {0, 0};
+	int err;
 
 	if (flags == PEROUT_ENABLE_OUTPUT_MASK)
-		return idtcm_output_mask_enable(channel, enable);
+		err = idtcm_output_mask_enable(channel, enable);
+	else
+		err = idtcm_output_enable(channel, enable, perout->index);
+
+	if (err) {
+		dev_err(&idtcm->client->dev, "Unable to set output enable");
+		return err;
+	}
 
-	/* Enable/disable individual output instead */
-	return idtcm_output_enable(channel, enable, perout->index);
+	/* Align output to internal 1 PPS */
+	return _idtcm_settime(channel, &ts, SCSR_TOD_WR_TYPE_SEL_DELTA_PLUS);
 }
 
 static int idtcm_get_pll_mode(struct idtcm_channel *channel,
-- 
2.7.4