linux-kernel - Re: [PATCH 1/5] iio: temperature: mcp9600: set channel2 member

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Message-ID: <20240430131102.00005e58@Huawei.com>
Date: Tue, 30 Apr 2024 13:11:02 +0100
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Dimitri Fedrau <dima.fedrau@...il.com>
CC: Jonathan Cameron <jic23@...nel.org>, Lars-Peter Clausen <lars@...afoo.de>,
	Andrew Hepp <andrew.hepp@...pp.dev>, Marcelo Schmitt
	<marcelo.schmitt1@...il.com>, <linux-iio@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/5] iio: temperature: mcp9600: set channel2 member

On Tue, 30 Apr 2024 14:05:31 +0200
Dimitri Fedrau <dima.fedrau@...il.com> wrote:

> Set channel2 member of channel 0 to IIO_MOD_TEMP_OBJECT and set modified
> member to 1.
This an ABI change, so needs a strong argument + must be a fix 
rather than an improvement.  So why does this need to change?

Jonathan

> 
> Signed-off-by: Dimitri Fedrau <dima.fedrau@...il.com>
> ---
>  drivers/iio/temperature/mcp9600.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/iio/temperature/mcp9600.c b/drivers/iio/temperature/mcp9600.c
> index 7a3eef5d5e75..e277edb4ae4b 100644
> --- a/drivers/iio/temperature/mcp9600.c
> +++ b/drivers/iio/temperature/mcp9600.c
> @@ -26,6 +26,8 @@ static const struct iio_chan_spec mcp9600_channels[] = {
>  	{
>  		.type = IIO_TEMP,
>  		.address = MCP9600_HOT_JUNCTION,
> +		.channel2 = IIO_MOD_TEMP_OBJECT,
> +		.modified = 1,
>  		.info_mask_separate =
>  			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
>  	},