[PATCH 2/2] hwmon: (aht10) Fix initialization commands and add DT support

[Hao Yu <haoyufine@gmail.com>]

Correct AHT20 initialization command sequence and
change DHT20 command format to 0bxxxxx notation.

Tested on rk3566_lckfb board with aht20 sensor connected at i2c-2 port.

Signed-off-by: Hao Yu <haoyufine@gmail.com>
---
 drivers/hwmon/aht10.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/aht10.c b/drivers/hwmon/aht10.c
index 007befdba977..c18332cc48ba 100644
--- a/drivers/hwmon/aht10.c
+++ b/drivers/hwmon/aht10.c
@@ -37,7 +37,9 @@
 #define AHT10_CMD_MEAS	0b10101100
 #define AHT10_CMD_RST	0b10111010
 
-#define DHT20_CMD_INIT	0x71
+#define AHT20_CMD_INIT 0b10111110
+
+#define DHT20_CMD_INIT	0b01110001
 
 /*
  * Flags in the answer byte/command
@@ -60,6 +62,15 @@ static const struct i2c_device_id aht10_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, aht10_id);
 
+static const struct of_device_id aht10_of_match[] = {
+	{ .compatible = "aosong,aht10", .data = (void *)aht10 },
+	{ .compatible = "aosong,aht20", .data = (void *)aht20 },
+	{ .compatible = "aosong,dht20", .data = (void *)dht20 },
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, aht10_of_match);
+
 /**
  *   struct aht10_data - All the data required to operate an AHT10/AHT20 chip
  *   @client: the i2c client associated with the AHT10/AHT20
@@ -341,7 +352,7 @@ static int aht10_probe(struct i2c_client *client)
 		data->meas_size = AHT20_MEAS_SIZE;
 		data->crc8 = true;
 		crc8_populate_msb(crc8_table, AHT20_CRC8_POLY);
-		data->init_cmd = AHT10_CMD_INIT;
+		data->init_cmd = AHT20_CMD_INIT;
 		break;
 	case dht20:
 		data->meas_size = AHT20_MEAS_SIZE;
@@ -375,6 +386,7 @@ static int aht10_probe(struct i2c_client *client)
 static struct i2c_driver aht10_driver = {
 	.driver = {
 		.name = "aht10",
+		.of_match_table = aht10_of_match,
 	},
 	.probe      = aht10_probe,
 	.id_table   = aht10_id,
-- 
2.34.1