drivers: lis2dh: read reference register prior to wakeup (ca92f96f) · Commits · Wenxi XU / zephyr

drivers/sensor/st/lis2dh/lis2dh.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -437,9 +437,17 @@ static int lis2dh_pm_action(const struct device *dev,
		{
		int status;
		struct lis2dh_data *lis2dh = dev->data;
		uint8_t regdata;

		switch (action) {
		case PM_DEVICE_ACTION_RESUME:
		/* read REFERENCE register (see datasheet rev 6 section 8.9 footnote 1) */
		status = lis2dh->hw_tf->read_reg(dev, LIS2DH_REG_REFERENCE, &regdata);
		if (status < 0) {
		LOG_ERR("failed to read reg_reference");
		return status;
		}

		/* Resume previous mode. */
		status = lis2dh->hw_tf->write_reg(dev, LIS2DH_REG_CTRL1,
		lis2dh->reg_ctrl1_active_val);