linux-kernel - Re: [PATCH v1] hwmon: emc1403: Add support for EMC1442

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Message-ID: <7d92d8ae-c247-4a71-a84d-4f9639a43fb8@roeck-us.net>
Date:   Tue, 31 Oct 2023 16:01:10 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>
Cc:     patrick@...cx.xyz, Jean Delvare <jdelvare@...e.com>,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] hwmon: emc1403: Add support for EMC1442

On Tue, Oct 31, 2023 at 04:58:06PM +0800, Delphine CC Chiu wrote:
> Add support for EMC1442 which is compatible with EMC1403.
> 

Unfortunately, almost no information is available about this chip
except that it ships in an 8-pin package. Are you sure the chip
supports two external temperature sensors like EMC1403 ?
The chip numbering and the number of pins would suggest that
it only supports a single external temperature sensor,
which would make it compatible to emc1402/emc1422.

Guenter

> Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>
> ---
>  drivers/hwmon/emc1403.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/hwmon/emc1403.c b/drivers/hwmon/emc1403.c
> index bb7c859e799d..c0d2e96c5077 100644
> --- a/drivers/hwmon/emc1403.c
> +++ b/drivers/hwmon/emc1403.c
> @@ -346,6 +346,9 @@ static int emc1403_detect(struct i2c_client *client,
>  	case 0x27:
>  		strscpy(info->type, "emc1424", I2C_NAME_SIZE);
>  		break;
> +	case 0x60:
> +		strscpy(info->type, "emc1442", I2C_NAME_SIZE);
> +		break;
>  	default:
>  		return -ENODEV;
>  	}
> @@ -430,7 +433,7 @@ static int emc1403_probe(struct i2c_client *client)
>  }
>  
>  static const unsigned short emc1403_address_list[] = {
> -	0x18, 0x1c, 0x29, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END
> +	0x18, 0x1c, 0x29, 0x3c, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END
>  };
>  
>  /* Last digit of chip name indicates number of channels */
> @@ -444,6 +447,7 @@ static const struct i2c_device_id emc1403_idtable[] = {
>  	{ "emc1422", emc1402 },
>  	{ "emc1423", emc1403 },
>  	{ "emc1424", emc1404 },
> +	{ "emc1442", emc1403 },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(i2c, emc1403_idtable);