linux-kernel - Re: [PATCH v2 1/9] iio: dac: ad3552r-common: fix ad3541/2r ranges

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Message-ID: <2c43b7a8-1005-4364-83fd-b2a06cb18a25@baylibre.com>
Date: Wed, 8 Jan 2025 14:43:22 -0600
From: David Lechner <dlechner@...libre.com>
To: Angelo Dureghello <adureghello@...libre.com>,
 Lars-Peter Clausen <lars@...afoo.de>,
 Michael Hennerich <Michael.Hennerich@...log.com>,
 Jonathan Cameron <jic23@...nel.org>,
 Mihail Chindris <mihail.chindris@...log.com>, Nuno Sa <nuno.sa@...log.com>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>,
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/9] iio: dac: ad3552r-common: fix ad3541/2r ranges

On 1/8/25 11:29 AM, Angelo Dureghello wrote:
> From: Angelo Dureghello <adureghello@...libre.com>
> 
> Fix ad3541/2r voltage ranges to be as per ad3542r datasheet,
> rev. C, table 38 (page 57).
> 
> The wrong ad354xr ranges was generating erroneous Vpp output.
> 
> In more details:
> - fix wrong number of ranges, they are 5 ranges, not 6,
> - remove non-existent 0-3V range,
> - adjust order, since ad3552r_find_range() get a wrong index,
>   producing a wrong Vpp as output.
> 
> Retested all the ranges on real hardware, EVALAD3542RFMCZ:
> 
> adi,output-range-microvolt (fdt):
> <(000000) (2500000)>;   ok (Rfbx1, switch 10)
> <(000000) (5000000)>;   ok (Rfbx1, switch 10)
> <(000000) (10000000)>;  ok (Rfbx1, switch 10)
> <(-5000000) (5000000)>; ok (Rfbx2, switch +/- 5)
> <(-2500000) (7500000)>; ok (Rfbx2, switch -2.5/7.5)
> 
> Fixes: 8f2b54824b28 ("drivers:iio:dac: Add AD3552R driver support")
> Signed-off-by: Angelo Dureghello <adureghello@...libre.com>
> ---
Reviewed-by: David Lechner <dlechner@...libre.com>