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From: Frank Li <Frank.Li@nxp.com>
To: miquel.raynal@bootlin.com
Cc: Frank.Li@nxp.com, alexandre.belloni@bootlin.com,
	conor.culhane@silvaco.com, imx@lists.linux.dev, joe@perches.com,
	linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/6] master reduce clock
Date: Wed, 18 Oct 2023 11:48:04 -0400	[thread overview]
Message-ID: <20231018154809.3304558-2-Frank.Li@nxp.com> (raw)
In-Reply-To: <20231018154809.3304558-1-Frank.Li@nxp.com>

---
 drivers/i3c/master/svc-i3c-master.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index e307ba2b965e6..d29de5fe533e6 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -511,7 +511,7 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
 	 * Using I3C Push-Pull mode, target is 12.5MHz/80ns period.
 	 * Simplest configuration is using a 50% duty-cycle of 40ns.
 	 */
-	ppbaud = DIV_ROUND_UP(40, fclk_period_ns) - 1;
+	ppbaud = DIV_ROUND_UP(500, fclk_period_ns) - 1;
 	pplow = 0;
 
 	/*
@@ -521,7 +521,7 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
 	 */
 	odhpp = 1;
 	high_period_ns = (ppbaud + 1) * fclk_period_ns;
-	odbaud = DIV_ROUND_UP(240 - high_period_ns, high_period_ns) - 1;
+	odbaud = DIV_ROUND_UP(540 - high_period_ns, high_period_ns) - 1;
 	od_low_period_ns = (odbaud + 1) * high_period_ns;
 
 	switch (bus->mode) {
-- 
2.34.1


WARNING: multiple messages have this Message-ID (diff)
From: Frank Li <Frank.Li@nxp.com>
To: miquel.raynal@bootlin.com
Cc: Frank.Li@nxp.com, alexandre.belloni@bootlin.com,
	conor.culhane@silvaco.com, imx@lists.linux.dev, joe@perches.com,
	linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/6] master reduce clock
Date: Wed, 18 Oct 2023 11:48:04 -0400	[thread overview]
Message-ID: <20231018154809.3304558-2-Frank.Li@nxp.com> (raw)
In-Reply-To: <20231018154809.3304558-1-Frank.Li@nxp.com>

---
 drivers/i3c/master/svc-i3c-master.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index e307ba2b965e6..d29de5fe533e6 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -511,7 +511,7 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
 	 * Using I3C Push-Pull mode, target is 12.5MHz/80ns period.
 	 * Simplest configuration is using a 50% duty-cycle of 40ns.
 	 */
-	ppbaud = DIV_ROUND_UP(40, fclk_period_ns) - 1;
+	ppbaud = DIV_ROUND_UP(500, fclk_period_ns) - 1;
 	pplow = 0;
 
 	/*
@@ -521,7 +521,7 @@ static int svc_i3c_master_bus_init(struct i3c_master_controller *m)
 	 */
 	odhpp = 1;
 	high_period_ns = (ppbaud + 1) * fclk_period_ns;
-	odbaud = DIV_ROUND_UP(240 - high_period_ns, high_period_ns) - 1;
+	odbaud = DIV_ROUND_UP(540 - high_period_ns, high_period_ns) - 1;
 	od_low_period_ns = (odbaud + 1) * high_period_ns;
 
 	switch (bus->mode) {
-- 
2.34.1


-- 
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linux-i3c@lists.infradead.org
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  reply	other threads:[~2023-10-18 15:48 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-18 15:48 [PATCH v2 0/6] i3c: master: svc: collection of bugs fixes Frank Li
2023-10-18 15:48 ` Frank Li
2023-10-18 15:48 ` Frank Li [this message]
2023-10-18 15:48   ` [PATCH v2 1/6] master reduce clock Frank Li
2023-10-18 15:48 ` [PATCH v2 2/6] i3c: master: svc: fix race condition in ibi work thread Frank Li
2023-10-18 15:48   ` Frank Li
2023-10-18 15:48 ` [PATCH v2 3/6] i3c: master: svc: fix wrong data return when IBI happen during start frame Frank Li
2023-10-18 15:48   ` Frank Li
2023-10-18 15:48 ` [PATCH v2 4/6] i3c: master: svc: fix ibi may not return mandatory data byte Frank Li
2023-10-18 15:48   ` Frank Li
2023-10-18 15:48 ` [PATCH v2 5/6] i3c: master: svc: fix check wrong status register in irq handler Frank Li
2023-10-18 15:48   ` Frank Li
2023-10-18 15:48 ` [PATCH v2 6/6] i3c: master: svc: fix SDA keep low when polling IBIWON timeout happen Frank Li
2023-10-18 15:48   ` Frank Li
2023-10-18 16:03 ` [PATCH v2 0/6] i3c: master: svc: collection of bugs fixes Frank Li
2023-10-18 16:03   ` Frank Li

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