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From: Alain Volmat <alain.volmat@foss.st.com>
To: <wsa@kernel.org>, <robh+dt@kernel.org>
Cc: <mark.rutland@arm.com>, <pierre-yves.mordret@foss.st.com>,
	<mcoquelin.stm32@gmail.com>, <alexandre.torgue@foss.st.com>,
	<linux-i2c@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-stm32@st-md-mailman.stormreply.com>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <fabrice.gasnier@foss.st.com>,
	<alain.volmat@foss.st.com>
Subject: [PATCH 1/5] i2c: stm32f7: fix configuration of the digital filter
Date: Fri, 5 Feb 2021 09:51:40 +0100	[thread overview]
Message-ID: <1612515104-838-2-git-send-email-alain.volmat@foss.st.com> (raw)
In-Reply-To: <1612515104-838-1-git-send-email-alain.volmat@foss.st.com>

The digital filter related computation are present in the driver
however the programming of the filter within the IP is missing.
The maximum value for the DNF is wrong and should be 15 instead of 16.

Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 drivers/i2c/busses/i2c-stm32f7.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 9aa8e65b511e..473fbe144b7e 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -57,6 +57,8 @@
 #define STM32F7_I2C_CR1_RXDMAEN			BIT(15)
 #define STM32F7_I2C_CR1_TXDMAEN			BIT(14)
 #define STM32F7_I2C_CR1_ANFOFF			BIT(12)
+#define STM32F7_I2C_CR1_DNF_MASK		GENMASK(11, 8)
+#define STM32F7_I2C_CR1_DNF(n)			(((n) & 0xf) << 8)
 #define STM32F7_I2C_CR1_ERRIE			BIT(7)
 #define STM32F7_I2C_CR1_TCIE			BIT(6)
 #define STM32F7_I2C_CR1_STOPIE			BIT(5)
@@ -160,7 +162,7 @@ enum {
 };
 
 #define STM32F7_I2C_DNF_DEFAULT			0
-#define STM32F7_I2C_DNF_MAX			16
+#define STM32F7_I2C_DNF_MAX			15
 
 #define STM32F7_I2C_ANALOG_FILTER_ENABLE	1
 #define STM32F7_I2C_ANALOG_FILTER_DELAY_MIN	50	/* ns */
@@ -725,6 +727,13 @@ static void stm32f7_i2c_hw_config(struct stm32f7_i2c_dev *i2c_dev)
 	else
 		stm32f7_i2c_set_bits(i2c_dev->base + STM32F7_I2C_CR1,
 				     STM32F7_I2C_CR1_ANFOFF);
+
+	/* Program the Digital Filter */
+	stm32f7_i2c_clr_bits(i2c_dev->base + STM32F7_I2C_CR1,
+			     STM32F7_I2C_CR1_DNF_MASK);
+	stm32f7_i2c_set_bits(i2c_dev->base + STM32F7_I2C_CR1,
+			     STM32F7_I2C_CR1_DNF(i2c_dev->setup.dnf));
+
 	stm32f7_i2c_set_bits(i2c_dev->base + STM32F7_I2C_CR1,
 			     STM32F7_I2C_CR1_PE);
 }
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Alain Volmat <alain.volmat@foss.st.com>
To: <wsa@kernel.org>, <robh+dt@kernel.org>
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
	alexandre.torgue@foss.st.com, linux-kernel@vger.kernel.org,
	fabrice.gasnier@foss.st.com, pierre-yves.mordret@foss.st.com,
	linux-i2c@vger.kernel.org, mcoquelin.stm32@gmail.com,
	alain.volmat@foss.st.com,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/5] i2c: stm32f7: fix configuration of the digital filter
Date: Fri, 5 Feb 2021 09:51:40 +0100	[thread overview]
Message-ID: <1612515104-838-2-git-send-email-alain.volmat@foss.st.com> (raw)
In-Reply-To: <1612515104-838-1-git-send-email-alain.volmat@foss.st.com>

The digital filter related computation are present in the driver
however the programming of the filter within the IP is missing.
The maximum value for the DNF is wrong and should be 15 instead of 16.

Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 drivers/i2c/busses/i2c-stm32f7.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 9aa8e65b511e..473fbe144b7e 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -57,6 +57,8 @@
 #define STM32F7_I2C_CR1_RXDMAEN			BIT(15)
 #define STM32F7_I2C_CR1_TXDMAEN			BIT(14)
 #define STM32F7_I2C_CR1_ANFOFF			BIT(12)
+#define STM32F7_I2C_CR1_DNF_MASK		GENMASK(11, 8)
+#define STM32F7_I2C_CR1_DNF(n)			(((n) & 0xf) << 8)
 #define STM32F7_I2C_CR1_ERRIE			BIT(7)
 #define STM32F7_I2C_CR1_TCIE			BIT(6)
 #define STM32F7_I2C_CR1_STOPIE			BIT(5)
@@ -160,7 +162,7 @@ enum {
 };
 
 #define STM32F7_I2C_DNF_DEFAULT			0
-#define STM32F7_I2C_DNF_MAX			16
+#define STM32F7_I2C_DNF_MAX			15
 
 #define STM32F7_I2C_ANALOG_FILTER_ENABLE	1
 #define STM32F7_I2C_ANALOG_FILTER_DELAY_MIN	50	/* ns */
@@ -725,6 +727,13 @@ static void stm32f7_i2c_hw_config(struct stm32f7_i2c_dev *i2c_dev)
 	else
 		stm32f7_i2c_set_bits(i2c_dev->base + STM32F7_I2C_CR1,
 				     STM32F7_I2C_CR1_ANFOFF);
+
+	/* Program the Digital Filter */
+	stm32f7_i2c_clr_bits(i2c_dev->base + STM32F7_I2C_CR1,
+			     STM32F7_I2C_CR1_DNF_MASK);
+	stm32f7_i2c_set_bits(i2c_dev->base + STM32F7_I2C_CR1,
+			     STM32F7_I2C_CR1_DNF(i2c_dev->setup.dnf));
+
 	stm32f7_i2c_set_bits(i2c_dev->base + STM32F7_I2C_CR1,
 			     STM32F7_I2C_CR1_PE);
 }
-- 
2.17.1


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  reply	other threads:[~2021-02-05  8:54 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-05  8:51 [PATCH 0/5] i2c: stm32: filter binding support & debug info Alain Volmat
2021-02-05  8:51 ` Alain Volmat
2021-02-05  8:51 ` Alain Volmat [this message]
2021-02-05  8:51   ` [PATCH 1/5] i2c: stm32f7: fix configuration of the digital filter Alain Volmat
2021-02-05 14:58   ` Pierre Yves MORDRET
2021-02-05 14:58     ` Pierre Yves MORDRET
2021-02-12 10:36   ` Wolfram Sang
2021-02-12 10:36     ` Wolfram Sang
2021-02-05  8:51 ` [PATCH 2/5] i2c: stm32f7: support DT binding i2c-analog-filter Alain Volmat
2021-02-05  8:51   ` Alain Volmat
2021-02-05 14:58   ` Pierre Yves MORDRET
2021-02-05 14:58     ` Pierre Yves MORDRET
2021-03-18 10:51     ` Wolfram Sang
2021-03-18 10:51       ` Wolfram Sang
2021-03-18 10:54   ` Wolfram Sang
2021-03-18 10:54     ` Wolfram Sang
2021-02-05  8:51 ` [PATCH 3/5] i2c: stm32f7: add support for DNF i2c-digital-filter binding Alain Volmat
2021-02-05  8:51   ` Alain Volmat
2021-02-05 14:59   ` Pierre Yves MORDRET
2021-02-05 14:59     ` Pierre Yves MORDRET
2021-03-18 10:54   ` Wolfram Sang
2021-03-18 10:54     ` Wolfram Sang
2021-02-05  8:51 ` [PATCH 4/5] ARM: dts: stm32: enable the analog filter for all I2C nodes in stm32mp151 Alain Volmat
2021-02-05  8:51   ` Alain Volmat
2021-02-10  8:39   ` Pierre Yves MORDRET
2021-02-10  8:39     ` Pierre Yves MORDRET
2021-03-29  9:16     ` Alexandre TORGUE
2021-03-29  9:16       ` Alexandre TORGUE
2021-03-18 10:55   ` Wolfram Sang
2021-03-18 10:55     ` Wolfram Sang
2021-03-18 13:16     ` Alexandre TORGUE
2021-03-18 13:16       ` Alexandre TORGUE
2021-02-05  8:51 ` [PATCH 5/5] i2c: stm32f7: indicate the address being accessed on errors Alain Volmat
2021-02-05  8:51   ` Alain Volmat
2021-02-05 14:59   ` Pierre Yves MORDRET
2021-02-05 14:59     ` Pierre Yves MORDRET
2021-03-18 10:58   ` Wolfram Sang
2021-03-18 10:58     ` Wolfram Sang
2021-02-05 14:57 ` [PATCH 0/5] i2c: stm32: filter binding support & debug info Pierre Yves MORDRET
2021-02-05 14:57   ` Pierre Yves MORDRET

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