linux-kernel - Re: [PATCH v2] iio: dac: ad3552r: Correct device IDs

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Message-ID: <20230805190131.0cab0b3d@jic23-huawei>
Date:   Sat, 5 Aug 2023 19:01:31 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Marcelo Schmitt <marcelo.schmitt1@...il.com>
Cc:     nuno.sa@...log.com, lars@...afoo.de, Michael.Hennerich@...log.com,
        lgirdwood@...il.com, broonie@...nel.org,
        Chandrakant.Minajigi@...log.com, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] iio: dac: ad3552r: Correct device IDs

On Thu, 3 Aug 2023 16:56:23 -0300
Marcelo Schmitt <marcelo.schmitt1@...il.com> wrote:

> Device IDs for AD3542R and AD3552R were swapped leading to unintended
> collection of DAC output ranges being used for each design.
> Change device ID values so they are correct for each DAC chip.
> 
> Fixes: 8f2b54824b28 ("drivers:iio:dac: Add AD3552R driver support")
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@...il.com>
> Reported-by: Chandrakant Minajigi <Chandrakant.Minajigi@...log.com>
Applied to the fixes-togreg branch of iio.git and marked for stable.

Thanks,

Jonathan

> ---
> A user has reported that the IDs were wrong and the output ranges were not ok.
> Also, the dt-doc and the driver require the adi,output-range-microvolt property
> for ad3542r but not for ad3552r, which could cause actual ad3552r probing to
> fail if the device node did not have that property.
> It's not clear from datasheet if setting the output range is really required for
> ad3542r.
> 
> Was once better at sending patches. Hope I get used to it again :)
> 
> Thanks
> 
>  drivers/iio/dac/ad3552r.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/dac/ad3552r.c b/drivers/iio/dac/ad3552r.c
> index d5ea1a1be122..a492e8f2fc0f 100644
> --- a/drivers/iio/dac/ad3552r.c
> +++ b/drivers/iio/dac/ad3552r.c
> @@ -140,8 +140,8 @@ enum ad3552r_ch_vref_select {
>  };
>  
>  enum ad3542r_id {
> -	AD3542R_ID = 0x4008,
> -	AD3552R_ID = 0x4009,
> +	AD3542R_ID = 0x4009,
> +	AD3552R_ID = 0x4008,
>  };
>  
>  enum ad3552r_ch_output_range {