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hwmon: aht10: Fix AHT20 initialization

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The existing driver claims AHT20 support in i2c_device_id, but fails to:
1. Use the correct init command (0xBE for AHT20 vs 0xE1 for AHT10)
2. Omit AHT10_MODE_CYC which AHT20 doesn't support/require

Add proper initialization sequence and include "aosong,aht20" in the
device tree match table to fully support the AHT20.

Signed-off-by: Josh Martinez <8892161+joshermar@users.noreply.github.com>
This commit is contained in:
Josh Martinez
2025-04-20 17:29:36 -05:00
committed by Dom Cobley
parent 9fe5dd93c2
commit 6f7f0c41b6
1 changed files with 10 additions and 2 deletions
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12
drivers/hwmon/aht10.c
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@@ -37,6 +37,8 @@
#define AHT10_CMD_MEAS 0b10101100
#define AHT10_CMD_RST 0b10111010
#define AHT20_CMD_INIT 0b10111110
/*
* Flags in the answer byte/command
*/
@@ -59,6 +61,7 @@ MODULE_DEVICE_TABLE(i2c, aht10_id);
static const struct of_device_id aht10_of_id[] = {
{ .compatible = "aosong,aht10", },
{ .compatible = "aosong,aht20", },
{ }
};
MODULE_DEVICE_TABLE(of, aht10_of_id);
@@ -107,8 +110,13 @@ struct aht10_data {
*/
static int aht10_init(struct aht10_data *data)
{
const u8 cmd_init[] = {AHT10_CMD_INIT, AHT10_CAL_ENABLED | AHT10_MODE_CYC,
0x00};
u8 cmd_init[] = {AHT10_CMD_INIT, AHT10_CAL_ENABLED | AHT10_MODE_CYC, 0x00};
if (data->crc8) { /* AHT20 */
cmd_init[0] = AHT20_CMD_INIT;
cmd_init[1] = AHT10_CAL_ENABLED;
}
int res;
u8 status;
struct i2c_client *client = data->client;