linux-kernel - Re: [PATCH v2 1/3] iio: dac: ad5686: add support for AD5338R

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Message-ID: <20200923211858.4709ec53@archlinux>
Date:   Wed, 23 Sep 2020 21:18:58 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Michael Auchter <michael.auchter@...com>
Cc:     Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v2 1/3] iio: dac: ad5686: add support for AD5338R

On Tue, 22 Sep 2020 13:40:10 -0500
Michael Auchter <michael.auchter@...com> wrote:

> The AD5338R is a 10-bit DAC with 2 outputs and an internal 2.5V
> reference (enabled by default). The register configuration is nearly
> identical to the AD5696R DAC that's already supported by this driver,
> with the channel selection bits being the only thing different.
> 
> Signed-off-by: Michael Auchter <michael.auchter@...com>

Looks good to me - just the DT binding to tweak for v3 unless
anyone else comments.

Thanks,

Jonathan


> ---
> Changes since v1:
> - Keep things sorted by product name
> - Update Kconfig description to list supported converters
> 
>  drivers/iio/dac/Kconfig      |  7 ++++---
>  drivers/iio/dac/ad5686.c     | 13 +++++++++++++
>  drivers/iio/dac/ad5686.h     |  1 +
>  drivers/iio/dac/ad5696-i2c.c |  1 +
>  4 files changed, 19 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
> index dae8d27e772d..6f6074a5d3db 100644
> --- a/drivers/iio/dac/Kconfig
> +++ b/drivers/iio/dac/Kconfig
> @@ -141,9 +141,10 @@ config AD5696_I2C
>  	depends on I2C
>  	select AD5686
>  	help
> -	  Say yes here to build support for Analog Devices AD5671R, AD5675R,
> -	  AD5694, AD5694R, AD5695R, AD5696, AD5696R Voltage Output Digital to
> -	  Analog Converter.
> +	  Say yes here to build support for Analog Devices AD5311R, AD5338R,
> +	  AD5671R, AD5675R, AD5691R, AD5692R, AD5693, AD5693R, AD5694, AD5694R,
> +	  AD5695R, AD5696, and AD5696R Digital to Analog converters.
> +
>  	  To compile this driver as a module, choose M here: the module will be
>  	  called ad5696.
>  
> diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c
> index 56cf9344d187..382b3eb7ec06 100644
> --- a/drivers/iio/dac/ad5686.c
> +++ b/drivers/iio/dac/ad5686.c
> @@ -210,6 +210,12 @@ static struct iio_chan_spec name[] = {				\
>  		AD5868_CHANNEL(0, 0, bits, _shift),		\
>  }
>  
> +#define DECLARE_AD5338_CHANNELS(name, bits, _shift)		\
> +static struct iio_chan_spec name[] = {				\
> +		AD5868_CHANNEL(0, 1, bits, _shift),		\
> +		AD5868_CHANNEL(1, 8, bits, _shift),		\
> +}
> +
>  #define DECLARE_AD5686_CHANNELS(name, bits, _shift)		\
>  static struct iio_chan_spec name[] = {				\
>  		AD5868_CHANNEL(0, 1, bits, _shift),		\
> @@ -252,6 +258,7 @@ static struct iio_chan_spec name[] = {				\
>  
>  DECLARE_AD5693_CHANNELS(ad5310r_channels, 10, 2);
>  DECLARE_AD5693_CHANNELS(ad5311r_channels, 10, 6);
> +DECLARE_AD5338_CHANNELS(ad5338r_channels, 10, 6);
>  DECLARE_AD5676_CHANNELS(ad5672_channels, 12, 4);
>  DECLARE_AD5679_CHANNELS(ad5674r_channels, 12, 4);
>  DECLARE_AD5676_CHANNELS(ad5676_channels, 16, 0);
> @@ -276,6 +283,12 @@ static const struct ad5686_chip_info ad5686_chip_info_tbl[] = {
>  		.num_channels = 1,
>  		.regmap_type = AD5693_REGMAP,
>  	},
> +	[ID_AD5338R] = {
> +		.channels = ad5338r_channels,
> +		.int_vref_mv = 2500,
> +		.num_channels = 2,
> +		.regmap_type = AD5686_REGMAP,
> +	},
>  	[ID_AD5671R] = {
>  		.channels = ad5672_channels,
>  		.int_vref_mv = 2500,
> diff --git a/drivers/iio/dac/ad5686.h b/drivers/iio/dac/ad5686.h
> index 52009b5eef88..c714afa40adf 100644
> --- a/drivers/iio/dac/ad5686.h
> +++ b/drivers/iio/dac/ad5686.h
> @@ -52,6 +52,7 @@
>  enum ad5686_supported_device_ids {
>  	ID_AD5310R,
>  	ID_AD5311R,
> +	ID_AD5338R,
>  	ID_AD5671R,
>  	ID_AD5672R,
>  	ID_AD5674R,
> diff --git a/drivers/iio/dac/ad5696-i2c.c b/drivers/iio/dac/ad5696-i2c.c
> index ccf794caef43..89e7b063b7bb 100644
> --- a/drivers/iio/dac/ad5696-i2c.c
> +++ b/drivers/iio/dac/ad5696-i2c.c
> @@ -72,6 +72,7 @@ static int ad5686_i2c_remove(struct i2c_client *i2c)
>  
>  static const struct i2c_device_id ad5686_i2c_id[] = {
>  	{"ad5311r", ID_AD5311R},
> +	{"ad5338r", ID_AD5338R},
>  	{"ad5671r", ID_AD5671R},
>  	{"ad5675r", ID_AD5675R},
>  	{"ad5691r", ID_AD5691R},