From 058ae6336392f26bcfd825fa9c01914c52f47c4d Mon Sep 17 00:00:00 2001 From: Tinsae Tadesse Date: Tue, 27 Jan 2026 22:11:25 +0300 Subject: [PATCH] hwmon: spd5118: Document detect limitations under SPD Write Disable Document that on some x86 platforms the SMBus controller may enforce SPD Write Disable, which can prevent reliable operation of SPD5118 devices. In such configurations, automatic detection may result in probe failures unless instantiation is coordinated by the SMBus controller driver. No functional change. Signed-off-by: Tinsae Tadesse --- drivers/hwmon/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 157678b821fc..309fa639804d 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -2342,6 +2342,12 @@ config SENSORS_SPD5118_DETECT I2C SMBus subsystem. Devicetree based systems will instantiate attached devices if the DIMMs are listed in the devicetree file. + Note that on some x86 platforms the SMBus controller may enforce + SPD Write Disable, which can prevent reliable operation of SPD5118 + devices. In such configurations, automatic detection may lead to + probe failures unless instantiation is coordinated by the SMBus + controller driver. + Disabling the detect function will speed up boot time and reduce the risk of mis-detecting SPD5118 compliant devices. However, it may result in missed DIMMs under some circumstances. -- 2.47.3