On Wed, Dec 20, 2023 at 05:10:01PM +0100, Paul Menzel wrote: > On the Dell Precision 3540/0M14W7, BIOS 1.7.4 05/12/2020, Linux prints > the warning below. > > i801_smbus 0000:00:1f.4: Accelerometer lis3lv02d is present on SMBus but its address is unknown, skipping registration > > With the help of Wolfram Sang, the test to probe it on I²C bus 6 at address > 0x29 was successful. > > $ cd /sys/bus/pci/drivers/i801_smbus/0000:00:1f.4 > $ ls -d i2c-? > i2c-6 > $ sudo i2cdetect 6 > WARNING! This program can confuse your I2C bus, cause data loss and worse! > I will probe file /dev/i2c-6. > I will probe address range 0x08-0x77. > Continue? [Y/n] Y > 0 1 2 3 4 5 6 7 8 9 a b c d e f > 00: 08 -- -- -- -- -- -- -- > 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > 20: -- -- -- -- -- -- -- -- -- 29 -- -- -- -- -- -- > 30: 30 -- -- -- -- 35 UU UU -- -- -- -- -- -- -- -- > 40: -- -- -- -- 44 -- -- -- -- -- -- -- -- -- -- -- > 50: UU -- 52 -- -- -- -- -- -- -- -- -- -- -- -- -- > 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- > 70: -- -- -- -- -- -- -- -- > > $ echo lis3lv02d 0x29 | sudo tee /sys/bus/i2c/devices/i2c-6/new_device > $ sudo dmesg > […] > [ 2110.787000] i2c i2c-6: new_device: Instantiated device lis3lv02d at 0x29 > [ 2110.791932] lis3lv02d_i2c 6-0029: supply Vdd not found, using dummy regulator > [ 2110.791981] lis3lv02d_i2c 6-0029: supply Vdd_IO not found, using dummy regulator > [ 2110.809233] lis3lv02d: 8 bits 3DC sensor found > [ 2110.900668] input: ST LIS3LV02DL Accelerometer as /devices/platform/lis3lv02d/input/input23 > > So, the device has that accelerometer. Add the I2C address to the > mapping list. > > Link: https://lore.kernel.org/linux-i2c/97708c11-ac85-fb62-2c8e-d37739ca826f@xxxxxxxxxxxxx/ > Signed-off-by: Paul Menzel <pmenzel@xxxxxxxxxxxxx> Applied to for-next, thanks!
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