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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: zbtgNgEfWf99Dfem7x7TpZ0stoX6luZOr7uCU9qMjLI/u5QxC4/Dk3WPpOu0HHXBNmfMm6KfWb/qZEibzX+rYw0dAn5IImXpeBkwPPdH046SWrjOqq5NWuBKIU9oElZMYl7Zy1v4zaBsgddNHRtFjbBkbq26hVhCZcQkVHhUNRIfIhAMXkC1NYpciDAcok8D7oxiREA/JyzfoRhigXgK5VkjK1MAYROCGS/yivala69S7adeQH635tA7c+sqqTXKrTcspXlnl134gh7avzbHRSpyiNZd/BpvEumHTawQJEbKnYUqM5Jn/DOzk0vCLAq1/KTe/FIUHgM26nUzJyv4WBq3ETj3mMSJZZjV77sWYwCfwZmv22ddwsjOSM6EMm8Y2mttHp7zTSM4wZG6pAiHaB1Ev7ocxEjkmIaE6ZevHDq6Dr/vD6j0yN1KaQbwBCES X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jun 2026 08:59:22.5095 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 12200be5-17c5-4e70-c7a4-08dec14e67c8 X-MS-Exchange-CrossTenant-Id: 75e027c9-20d5-47d5-b82f-77d7cd041e8f X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=75e027c9-20d5-47d5-b82f-77d7cd041e8f;Ip=[164.130.1.60];Helo=[smtpO365.st.com] X-MS-Exchange-CrossTenant-AuthSource: AM3PEPF0000A78D.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM4PR10MB9404 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260603_015927_837218_F0078855 X-CRM114-Status: GOOD ( 18.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, thank you for you patch. On Tue, May 26, 2026 at 11:12:09AM +0200, Guillermo Rodríguez wrote: > stm32f7_i2c_compute_timing() uses i2c_dev->analog_filter to pick > the analog filter delay, but i2c_dev->analog_filter is parsed from > the "i2c-analog-filter" DT property only after the compute_timing > loop in stm32f7_i2c_setup_timing(), so in practice the timing > calculations always ignore the analog filter. On an STM32MP1 board > with clock-frequency = <400000> and i2c-analog-filter set, measured > SCL frequency was ~382 kHz. > > This also affects (widens) the computed SDADEL range. At high bus > clock speeds, this can select an SDADEL value that violates tVD;DAT > (data valid time). > > Fix by parsing "i2c-analog-filter" before the compute_timing loop. > > Fixes: 83c3408f7b9c ("i2c: stm32f7: support DT binding i2c-analog-filter") > Cc: stable@vger.kernel.org > Signed-off-by: Guillermo Rodríguez > --- > drivers/i2c/busses/i2c-stm32f7.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c > index 53d9df70ebe4..067af255bd22 100644 > --- a/drivers/i2c/busses/i2c-stm32f7.c > +++ b/drivers/i2c/busses/i2c-stm32f7.c > @@ -694,6 +694,9 @@ static int stm32f7_i2c_setup_timing(struct stm32f7_i2c_dev *i2c_dev, > if (!of_property_read_bool(i2c_dev->dev->of_node, "i2c-digital-filter")) > i2c_dev->dnf_dt = STM32F7_I2C_DNF_DEFAULT; > > + i2c_dev->analog_filter = of_property_read_bool(i2c_dev->dev->of_node, > + "i2c-analog-filter"); > + > do { > ret = stm32f7_i2c_compute_timing(i2c_dev, setup, > &i2c_dev->timing); > @@ -715,9 +718,6 @@ static int stm32f7_i2c_setup_timing(struct stm32f7_i2c_dev *i2c_dev, > return ret; > } > > - i2c_dev->analog_filter = of_property_read_bool(i2c_dev->dev->of_node, > - "i2c-analog-filter"); > - > dev_dbg(i2c_dev->dev, "I2C Speed(%i), Clk Source(%i)\n", > setup->speed_freq, setup->clock_src); > dev_dbg(i2c_dev->dev, "I2C Rise(%i) and Fall(%i) Time\n", > -- > 2.25.1 > Acked-by: Alain Volmat Regards, Alain