linux-kernel - Re: [PATCH 1/2] iio: dac: mcp4922: add support to mcp4921

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Date:   Fri, 24 Jun 2022 19:59:45 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Kory Maincent <kory.maincent@...tlin.com>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        thomas.petazzoni@...tlin.com, Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Cai Huoqing <cai.huoqing@...ux.dev>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Subject: Re: [PATCH 1/2] iio: dac: mcp4922: add support to mcp4921

Hi Kory,

kory.maincent@...tlin.com wrote on Fri, 24 Jun 2022 11:56:17 +0200:

> Add support to mcp4921 which has only one output channel.
> 
> Signed-off-by: Kory Maincent <kory.maincent@...tlin.com>

Reviewed-by: Miquel Raynal <miquel.raynal@...tlin.com>

> ---
>  drivers/iio/dac/mcp4922.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/dac/mcp4922.c b/drivers/iio/dac/mcp4922.c
> index cb9e60e71b91..0d41c0f25515 100644
> --- a/drivers/iio/dac/mcp4922.c
> +++ b/drivers/iio/dac/mcp4922.c
> @@ -17,10 +17,12 @@
>  #include <linux/bitops.h>
>  
>  #define MCP4922_NUM_CHANNELS	2
> +#define MCP4921_NUM_CHANNELS	1
>  
>  enum mcp4922_supported_device_ids {
>  	ID_MCP4902,
>  	ID_MCP4912,
> +	ID_MCP4921,
>  	ID_MCP4922,
>  };
>  
> @@ -105,9 +107,10 @@ static int mcp4922_write_raw(struct iio_dev *indio_dev,
>  	}
>  }
>  
> -static const struct iio_chan_spec mcp4922_channels[3][MCP4922_NUM_CHANNELS] = {
> +static const struct iio_chan_spec mcp4922_channels[4][MCP4922_NUM_CHANNELS] = {
>  	[ID_MCP4902] = { MCP4922_CHAN(0, 8),	MCP4922_CHAN(1, 8) },
>  	[ID_MCP4912] = { MCP4922_CHAN(0, 10),	MCP4922_CHAN(1, 10) },
> +	[ID_MCP4921] = { MCP4922_CHAN(0, 12),	{} },
>  	[ID_MCP4922] = { MCP4922_CHAN(0, 12),	MCP4922_CHAN(1, 12) },
>  };
>  
> @@ -154,7 +157,10 @@ static int mcp4922_probe(struct spi_device *spi)
>  	indio_dev->info = &mcp4922_info;
>  	indio_dev->modes = INDIO_DIRECT_MODE;
>  	indio_dev->channels = mcp4922_channels[id->driver_data];
> -	indio_dev->num_channels = MCP4922_NUM_CHANNELS;
> +	if (id->driver_data == ID_MCP4921)
> +		indio_dev->num_channels = MCP4921_NUM_CHANNELS;
> +	else
> +		indio_dev->num_channels = MCP4922_NUM_CHANNELS;
>  	indio_dev->name = id->name;
>  
>  	ret = iio_device_register(indio_dev);
> @@ -185,6 +191,7 @@ static void mcp4922_remove(struct spi_device *spi)
>  static const struct spi_device_id mcp4922_id[] = {
>  	{"mcp4902", ID_MCP4902},
>  	{"mcp4912", ID_MCP4912},
> +	{"mcp4921", ID_MCP4921},
>  	{"mcp4922", ID_MCP4922},
>  	{}
>  };


Thanks,
Miquèl