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Message-ID: <0d71a8ec-2d14-4937-95f3-04332b7fbb78@roeck-us.net>
Date: Wed, 8 May 2024 05:40:05 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Andrei Aldea <andrei1998@...il.com>
Cc: jdelvare@...e.com, linux-hwmon@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HWMon: LM80: Add "support" for Texas Instruments AMC80
On Wed, May 08, 2024 at 04:02:44AM -0500, Andrei Aldea wrote:
> Add support for AMC80 which is register compatible with LM96080 and a result of TI's acquisition of National Semiconductor
>
Line length. Also, "and a result of TI's acquisition of National
Semiconductor" is irrelevant.
> https://www.ti.com/lit/ds/symlink/amc80.pdf
This should be added to the documentation, not to the patch
description.
The subject should start with "hwmon: (lm80)", and please drop the quotes
around "support".
>
> Signed-off-by: Andrei Aldea <andrei1998@...il.com>
> ---
> drivers/hwmon/Kconfig | 4 ++--
> drivers/hwmon/lm80.c | 6 ++++++
Chip description (Documentation/hwmon/lm80.rst) needs to be updated as
well.
> 2 files changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
> index 83945397b6eb..f901ece2ff43 100644
> --- a/drivers/hwmon/Kconfig
> +++ b/drivers/hwmon/Kconfig
> @@ -1446,11 +1446,11 @@ config SENSORS_LM78
> will be called lm78.
>
> config SENSORS_LM80
> - tristate "National Semiconductor LM80 and LM96080"
> + tristate "National Semiconductor LM80, LM96080 and compatibles"
"National Semiconductor LM80 and compatibles"
> depends on I2C
> help
> If you say yes here you get support for National Semiconductor
> - LM80 and LM96080 sensor chips.
> + LM80, LM96080 and Texas Instruments AMC80 sensor chips.
>
> This driver can also be built as a module. If so, the module
> will be called lm80.
> diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c
> index 63c7831bd3e1..0355b9d849be 100644
> --- a/drivers/hwmon/lm80.c
> +++ b/drivers/hwmon/lm80.c
> @@ -573,6 +573,11 @@ static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
> return -ENODEV;
>
> name = "lm96080";
> +
> + /* Check for AMC80 version which is register compatible with lm96080 */
> + } else if (man_id == 0x80 && dev_id == 0x08) {
> + name = "amc80";
> +
> } else {
> /* Check 6-bit addressing */
> for (i = 0x2a; i <= 0x3d; i++) {
> @@ -624,6 +629,7 @@ static int lm80_probe(struct i2c_client *client)
> static const struct i2c_device_id lm80_id[] = {
> { "lm80", 0 },
> { "lm96080", 1 },
> + { "amc80", 2},
The driver_data values are unused and therefore unnecessary.
However, I did not have time to check the chip datasheet to confirm that
chip specific code is indeed not needed.
Guenter
> { }
> };
> MODULE_DEVICE_TABLE(i2c, lm80_id);
> --
> 2.39.3 (Apple Git-146)
>
>
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