linux-kernel - [PATCH net v3 2/2] ptp: ptp_clockmatrix: return -EBUSY if phase pull-in is in progress

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Message-Id: <1651518530-25128-2-git-send-email-min.li.xe@renesas.com>
Date:   Mon,  2 May 2022 15:08:50 -0400
From:   Min Li <min.li.xe@...esas.com>
To:     richardcochran@...il.com, lee.jones@...aro.org
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        Min Li <min.li.xe@...esas.com>
Subject: [PATCH net v3 2/2] ptp: ptp_clockmatrix: return -EBUSY if phase pull-in is in progress

Also removes PEROUT_ENABLE_OUTPUT_MASK

Signed-off-by: Min Li <min.li.xe@...esas.com>
Acked-by: Richard Cochran <richardcochran@...il.com>
---
 drivers/ptp/ptp_clockmatrix.c | 32 ++------------------------------
 drivers/ptp/ptp_clockmatrix.h |  2 --
 2 files changed, 2 insertions(+), 32 deletions(-)

diff --git a/drivers/ptp/ptp_clockmatrix.c b/drivers/ptp/ptp_clockmatrix.c
index d8c7e80..201e5a9 100644
--- a/drivers/ptp/ptp_clockmatrix.c
+++ b/drivers/ptp/ptp_clockmatrix.c
@@ -1363,43 +1363,15 @@ static int idtcm_output_enable(struct idtcm_channel *channel,
 	return idtcm_write(idtcm, (u16)base, OUT_CTRL_1, &val, sizeof(val));
 }
 
-static int idtcm_output_mask_enable(struct idtcm_channel *channel,
-				    bool enable)
-{
-	u16 mask;
-	int err;
-	u8 outn;
-
-	mask = channel->output_mask;
-	outn = 0;
-
-	while (mask) {
-		if (mask & 0x1) {
-			err = idtcm_output_enable(channel, enable, outn);
-			if (err)
-				return err;
-		}
-
-		mask >>= 0x1;
-		outn++;
-	}
-
-	return 0;
-}
-
 static int idtcm_perout_enable(struct idtcm_channel *channel,
 			       struct ptp_perout_request *perout,
 			       bool enable)
 {
 	struct idtcm *idtcm = channel->idtcm;
-	unsigned int flags = perout->flags;
 	struct timespec64 ts = {0, 0};
 	int err;
 
-	if (flags == PEROUT_ENABLE_OUTPUT_MASK)
-		err = idtcm_output_mask_enable(channel, enable);
-	else
-		err = idtcm_output_enable(channel, enable, perout->index);
+	err = idtcm_output_enable(channel, enable, perout->index);
 
 	if (err) {
 		dev_err(idtcm->dev, "Unable to set output enable");
@@ -1903,7 +1875,7 @@ static int idtcm_adjtime(struct ptp_clock_info *ptp, s64 delta)
 	int err;
 
 	if (channel->phase_pull_in == true)
-		return 0;
+		return -EBUSY;
 
 	mutex_lock(idtcm->lock);
 
diff --git a/drivers/ptp/ptp_clockmatrix.h b/drivers/ptp/ptp_clockmatrix.h
index 4379650..bf1e49409 100644
--- a/drivers/ptp/ptp_clockmatrix.h
+++ b/drivers/ptp/ptp_clockmatrix.h
@@ -54,8 +54,6 @@
 #define LOCK_TIMEOUT_MS			(2000)
 #define LOCK_POLL_INTERVAL_MS		(10)
 
-#define PEROUT_ENABLE_OUTPUT_MASK	(0xdeadbeef)
-
 #define IDTCM_MAX_WRITE_COUNT		(512)
 
 #define PHASE_PULL_IN_MAX_PPB		(144000)
-- 
2.7.4