From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Janani Sunil <janani.sunil@analog.com>
Cc: "Nuno Sá" <nuno.sa@analog.com>,
"Michael Hennerich" <Michael.Hennerich@analog.com>,
"Jonathan Cameron" <jic23@kernel.org>,
"David Lechner" <dlechner@baylibre.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Olivier Moysan" <olivier.moysan@foss.st.com>,
"Philipp Zabel" <p.zabel@pengutronix.de>,
"Linus Walleij" <linusw@kernel.org>,
"Bartosz Golaszewski" <brgl@kernel.org>,
"Jonathan Corbet" <corbet@lwn.net>,
"Shuah Khan" <skhan@linuxfoundation.org>,
"Michael Walle" <mwalle@kernel.org>,
linux@analog.com, linux-iio@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-gpio@vger.kernel.org, linux-doc@vger.kernel.org,
jananisunil.dev@gmail.com,
"Uwe Kleine-König" <u.kleine-koenig@baylibre.com>
Subject: Re: [PATCH v5 14/20] iio: adc: ad7768: Add per-channel conversion delay
Date: Mon, 31 Aug 2026 11:30:01 +0300 [thread overview]
Message-ID: <apU7iUhnmaEGmEmG@ashevche-desk.local> (raw)
In-Reply-To: <20260828-ad7768-driver-v5-14-e33ca6f841a2@analog.com>
On Fri, Aug 28, 2026 at 05:30:37PM +0200, Janani Sunil wrote:
> Expose the per-channel synchronization phase offset through the IIO
> conversion-delay attribute.
>
> Derive the delay resolution from MCLK, power mode and decimation rate.
> Validate the requested delay and program the corresponding phase
> register when applying the active channel configuration.
...
> + mclk = clk_get_rate(st->mclk);
> + if (!mclk)
> + return -EINVAL;
> +
> + mclk_div = ad7768_power_modes[st->power_mode_idx].mclk_div;
> + params->step_ps = DIV_ROUND_CLOSEST_ULL((u64)mult * PSEC_PER_SEC *
> + mclk_div, mclk);
params->step_ps =
DIV_ROUND_CLOSEST_ULL((u64)mult * PSEC_PER_SEC * mclk_div, mclk);
// Can mult be declared as u64/s64?
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-08-31 8:30 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-28 15:30 [PATCH v5 00/20] iio: adc: Add AD7768/AD7768-4 ADC driver support Janani Sunil
2026-08-28 15:30 ` [PATCH v5 01/20] iio: adc: adi-axi-adc: Initialize state mutex Janani Sunil
2026-08-28 15:30 ` [PATCH v5 02/20] dt-bindings: iio: adc: Add AD7768 Janani Sunil
2026-08-28 15:30 ` [PATCH v5 03/20] iio: backend: Add support for CRC Janani Sunil
2026-08-28 15:30 ` [PATCH v5 04/20] iio: adc: adi-axi-adc: " Janani Sunil
2026-08-28 15:30 ` [PATCH v5 05/20] iio: adc: Add AD7768 and AD7768-4 core support Janani Sunil
2026-08-31 9:04 ` Andy Shevchenko
2026-08-31 15:20 ` Janani Sunil
2026-09-01 7:19 ` Andy Shevchenko
2026-08-28 15:30 ` [PATCH v5 06/20] iio: adc: ad7768: Validate master clock rate Janani Sunil
2026-08-28 15:30 ` [PATCH v5 07/20] iio: adc: ad7768: Add power mode helper Janani Sunil
2026-08-31 4:44 ` Andy Shevchenko
2026-08-28 15:30 ` [PATCH v5 08/20] iio: adc: ad7768: Derive output data rates Janani Sunil
2026-08-31 8:09 ` Andy Shevchenko
2026-08-28 15:30 ` [PATCH v5 09/20] iio: adc: ad7768: Configure channel sampling profiles Janani Sunil
2026-08-31 8:18 ` Andy Shevchenko
2026-08-28 15:30 ` [PATCH v5 10/20] iio: adc: ad7768: Add sampling frequency controls Janani Sunil
2026-08-31 8:24 ` Andy Shevchenko
2026-08-28 15:30 ` [PATCH v5 11/20] iio: adc: ad7768: Add per-channel filter controls Janani Sunil
2026-08-28 15:30 ` [PATCH v5 12/20] iio: adc: ad7768: Wait for digital filters to settle Janani Sunil
2026-08-31 7:45 ` Andy Shevchenko
2026-08-28 15:30 ` [PATCH v5 13/20] iio: adc: ad7768: Add calibration controls Janani Sunil
2026-08-31 8:26 ` Andy Shevchenko
2026-08-28 15:30 ` [PATCH v5 14/20] iio: adc: ad7768: Add per-channel conversion delay Janani Sunil
2026-08-31 8:30 ` Andy Shevchenko [this message]
2026-08-28 15:30 ` [PATCH v5 15/20] iio: adc: ad7768: Add VCM regulator support Janani Sunil
2026-08-28 15:30 ` [PATCH v5 16/20] iio: adc: ad7768: Register GPIO auxiliary device Janani Sunil
2026-08-31 8:33 ` Andy Shevchenko
2026-08-28 15:30 ` [PATCH v5 17/20] gpio: regmap: Use regmap_test_bits() for single bit reads Janani Sunil
2026-09-02 13:48 ` Bartosz Golaszewski
2026-09-03 12:08 ` Janani Sunil
2026-08-28 15:30 ` [PATCH v5 18/20] gpio: regmap: Add optional runtime PM support Janani Sunil
2026-08-31 7:15 ` Andy Shevchenko
2026-08-28 15:30 ` [PATCH v5 19/20] gpio: ad7768: Add AD7768 GPIO auxiliary driver Janani Sunil
2026-08-28 15:30 ` [PATCH v5 20/20] Documentation: iio: Add AD7768 Documentation Janani Sunil
2026-08-29 18:19 ` [PATCH v5 00/20] iio: adc: Add AD7768/AD7768-4 ADC driver support Jonathan Cameron
2026-08-30 7:12 ` Andy Shevchenko
2026-09-01 8:32 ` Bartosz Golaszewski
2026-09-01 15:44 ` Jonathan Cameron
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