From: David Lechner <dlechner@baylibre.com>
To: "Olivier Moysan" <olivier.moysan@foss.st.com>,
"Jonathan Cameron" <jic23@kernel.org>,
"Nuno Sá" <nuno.sa@analog.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Maxime Coquelin" <mcoquelin.stm32@gmail.com>,
"Alexandre Torgue" <alexandre.torgue@foss.st.com>
Cc: Fabrice Gasnier <fabrice.gasnier@foss.st.com>,
linux-iio@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5] iio: adc: stm32: add oversampling support
Date: Thu, 24 Apr 2025 11:17:11 -0500 [thread overview]
Message-ID: <ab3dcc4e-bb85-4a5c-82f3-36bedec3e79d@baylibre.com> (raw)
In-Reply-To: <20250424151604.626758-1-olivier.moysan@foss.st.com>
On 4/24/25 10:16 AM, Olivier Moysan wrote:
> Add oversampling support for STM32H7, STM32MP15 & STM32MP13.
> STM32F4 ADC has no oversampling feature.
>
> The current support of the oversampling feature aims at increasing the
> data SNR, without changing the data resolution.
> As the oversampling by itself increases data resolution, a right shift
> is applied to keep the initial resolution.
> Only the oversampling ratio corresponding to a power of two are
> supported here, to get a direct link between right shift and
> oversampling ratio. (2^n ratio <=> n right shift)
>
> The oversampling ratio is shared by all channels, whatever channel type.
> (e.g. single ended or differential).
>
> Oversampling can be configured using IIO ABI:
> - oversampling_ratio_available
> - oversampling_ratio
>
> Co-developed-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
> Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
>
> ---
Don't forget to pick up other tags. In v4, I already gave
Reviewed-by: David Lechner <dlechner@baylibre.com>
next prev parent reply other threads:[~2025-04-24 16:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-24 15:16 [PATCH v5] iio: adc: stm32: add oversampling support Olivier Moysan
2025-04-24 16:17 ` David Lechner [this message]
2025-04-24 17:01 ` Andy Shevchenko
2025-04-26 14:15 ` Jonathan Cameron
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