diff --git a/host/modules/dmj-hwmon.c b/host/modules/dmj-hwmon.c
index eae375c..333d75f 100644
--- a/host/modules/dmj-hwmon.c
+++ b/host/modules/dmj-hwmon.c
@@ -43,6 +43,7 @@ static umode_t dmj_hwmon_is_visible(const void *data, enum hwmon_sensor_types ty
 		uint32_t attr, int ch)
 {
 	switch (attr) {
+	case hwmon_temp_type:
 	case hwmon_temp_input:
 	case hwmon_temp_min:
 	case hwmon_temp_max:
@@ -112,19 +113,77 @@ static const struct hwmon_chip_info dmj_chip_info = {
 	.info = dmj_hwmon_info
 };
 
+static int dmj_hwmon_check_hw(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	uint16_t m1ver;
+	uint8_t curmode, m1feat;
+	const int ver_min = 0x0010, ver_max = 0x0010;
+	int ret = 0, len;
+	uint8_t *buf = NULL;
+
+	ret = dmj_transfer(pdev, DMJ_CMD_CFG_GET_CUR_MODE,
+			DMJ_XFER_FLAGS_PARSE_RESP, NULL, 0, (void**)&buf, &len);
+	ret = dmj_check_retval(ret, len, dev, "hwmon test 1", true, sizeof(curmode), sizeof(curmode));
+	if (ret < 0 || !buf) goto out;
+
+	curmode = buf[0];
+	kfree(buf); buf = NULL;
+	if (curmode != 0x1) {
+		dev_err(dev, "device must be in mode 1 for hwmon to work, but it is in mode %d\n", curmode);
+		ret = -EIO;
+		goto out;
+	}
+
+	ret = dmj_transfer(pdev, (1<<4) | DMJ_CMD_MODE_GET_VERSION,
+			DMJ_XFER_FLAGS_PARSE_RESP, NULL, 0, (void**)&buf, &len);
+	ret = dmj_check_retval(ret, len, dev, "hwmon test 2", true, sizeof(m1ver), sizeof(m1ver));
+	if (ret < 0 || !buf) goto out;
+
+	m1ver = (uint16_t)buf[0] | ((uint16_t)buf[1] << 8);
+	kfree(buf); buf = NULL;
+	if (m1ver > ver_max || m1ver < ver_min) {
+		dev_err(dev, "bad mode 1 version %04x on device, must be between %04x and %04x\n",
+				m1ver, ver_min, ver_max);
+		ret = -EIO;
+		goto out;
+	}
+
+	ret = dmj_transfer(pdev, (1<<4) | DMJ_CMD_MODE_GET_FEATURES,
+			DMJ_XFER_FLAGS_PARSE_RESP, NULL, 0, (void**)&buf, &len);
+	ret = dmj_check_retval(ret, len, dev, "hwmon test 3", true, sizeof(m1feat), sizeof(m1feat));
+	if (ret < 0 || !buf) goto out;
+	m1feat = buf[0];
+	kfree(buf); buf = NULL;
+	if (!(m1feat & DMJ_FEATURE_MODE1_I2C)) {
+		dev_err(dev, "device's mode 1 does not support hwmon tempsensor\n");
+		ret = -EIO;
+		goto out;
+	}
+
+	ret = 0;
+
+out:
+	return ret;
+}
+
 static int dmj_hwmon_probe(struct platform_device *pdev)
 {
 	struct dmj_hwmon *dmjh;
 	struct device *dev = &pdev->dev;
 	int ret;
 
+	ret = dmj_hwmon_check_hw(pdev);
+	if (ret) {
+		dev_err(dev, "hw check failed: %d\n", ret);
+		return -ENODEV;
+	}
+
 	dmjh = devm_kzalloc(dev, sizeof(*dmjh), GFP_KERNEL);
 	if (!dmjh) return -ENOMEM;
 
 	dmjh->pdev = pdev;
 
-	/* TODO: check usb stuff? (mode1, tempsensor feature) */
-
 	platform_set_drvdata(pdev, dmjh);
 
 	dmjh->hwmon_dev = hwmon_device_register_with_info(dev, HWMON_NAME, dmjh,
diff --git a/host/modules/i2c-dmj.c b/host/modules/i2c-dmj.c
index 924a69a..0bdc866 100644
--- a/host/modules/i2c-dmj.c
+++ b/host/modules/i2c-dmj.c
@@ -224,7 +224,7 @@ static int dmj_i2c_check_hw(struct platform_device *pdev)
 	curmode = buf[0];
 	kfree(buf); buf = NULL;
 	if (curmode != 0x1) {
-		dev_err(dev, "device must be in mode 1 for ICD to work, but it is in mode %d\n", curmode);
+		dev_err(dev, "device must be in mode 1 for I2C to work, but it is in mode %d\n", curmode);
 		ret = -EIO;
 		goto out;
 	}
diff --git a/host/modules/spi-dmj.c b/host/modules/spi-dmj.c
index 5ded6df..e96e05d 100644
--- a/host/modules/spi-dmj.c
+++ b/host/modules/spi-dmj.c
@@ -118,6 +118,8 @@ struct dmj_spi {
 	uint8_t cmdmap[32];
 
 	spinlock_t csmap_lock;
+
+	struct spi_board_info binfo[8];
 };
 
 static int dmj_check_retval_sp(int ret, int len, struct device *dev,
@@ -169,6 +171,19 @@ static int devcaps_to_kernmode(uint16_t caps)
 
 	return ret;
 }
+static void caps_to_binfo(struct dmj_spi *dmjs, int busnum)
+{
+	int i;
+
+	for (i = 0; i < dmjs->caps.num_cs; ++i) {
+		snprintf(dmjs->binfo[i].modalias, SPI_NAME_SIZE, "spidev");
+		dmjs->binfo[i].controller_data = dmjs;
+		dmjs->binfo[i].max_speed_hz = dmjs->caps.freq_max;
+		dmjs->binfo[i].bus_num = busnum;
+		dmjs->binfo[i].chip_select = i;
+		dmjs->binfo[i].mode = 0; /* shrug */
+	}
+}
 
 static void bufconv_to_le(void *dst, const void *src, size_t len_bytes, uint8_t bpw)
 {
@@ -867,6 +882,15 @@ static int dmj_spi_probe(struct platform_device *pdev)
 		goto err_dereg;
 	}
 
+	dev_info(dev, "SPI bus number is %d\n", spictl->bus_num);
+
+	caps_to_binfo(dmjs, spictl->bus_num);
+	for (i = 0; i < dmjs->caps.num_cs; ++i) {
+		if (!spi_new_device(spictl, &dmjs->binfo[i])) {
+			dev_warn(dev, "failed to create %s device %d\n", dmjs->binfo[i].modalias, i);
+		}
+	}
+
 	return dmj_spi_set_pinstate(dmjs, true);
 
 err_dereg: