From 35619155d044830357f06f1d2c8188c4530b4d7a Mon Sep 17 00:00:00 2001 From: Lorenzo Bianconi Date: Sat, 13 Nov 2021 16:23:14 +0100 Subject: [PATCH] iio: imu: st_lsm6dsx: add dts property to disable sensor-hub Introduce the capability to disable sensorhub through a device-tree property since there are some configurations where users want to explicitly disable sensor-hub auto-probing at bootstrap. A typical configuration is when the sensorhub clock/data lines are connected to a pull-up resistor since no slave sensors are connected to the i2c master. If SDO/SA0 line is connected to the same pull-up resistor, when the driver tries to probe slave devices connected on sensor-hub, it will force SDO/SA0 line to low, modifying the device i2c address. Tested-by: Mario Tesi Signed-off-by: Lorenzo Bianconi Link: https://lore.kernel.org/r/ad7894e7b1c6fb3427fab3f623bb942860ad45cf.1636816719.git.lorenzo@kernel.org Signed-off-by: Jonathan Cameron --- drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index f2cbbc756459..727b4b6ac696 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -2244,7 +2244,9 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id, return err; hub_settings = &hw->settings->shub_settings; - if (hub_settings->master_en.addr) { + if (hub_settings->master_en.addr && + (!dev_fwnode(dev) || + !device_property_read_bool(dev, "st,disable-sensor-hub"))) { err = st_lsm6dsx_shub_probe(hw, name); if (err < 0) return err; -- 2.11.0