From: Jonathan Cameron <jic23@kernel.org>
To: Andy Shevchenko <andriy.shevchenko@intel.com>
Cc: "Ariana Lazar" <ariana.lazar@microchip.com>,
"David Lechner" <dlechner@baylibre.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
devicetree@vger.kernel.org
Subject: Re: [PATCH v4 1/9] iio: dac: mcp47feb02: initialize dac_data field in channel data struct at probe
Date: Sun, 23 Aug 2026 01:51:00 +0100 [thread overview]
Message-ID: <20260823015100.74b6f615@jic23-huawei> (raw)
In-Reply-To: <aoW657jDvmMiOsaX@ashevche-desk.local>
On Wed, 19 Aug 2026 17:17:11 +0300
Andy Shevchenko <andriy.shevchenko@intel.com> wrote:
> On Wed, Aug 19, 2026 at 03:41:05PM +0300, Ariana Lazar wrote:
> > Read DAC value register to initialize corresponding field in channel_data
> > struct when the module is inserted.
>
> Since we have a cache enabled for regmap, can we rather read back initial HW
> values at the probe time for all non-volatile or precise registers?
>
That should indeed be explored. This is also missing any description of 'why'
this needs to be read and cached at all.
Jonathan
next prev parent reply other threads:[~2026-08-23 0:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-19 12:41 [PATCH v4 0/9] Refactor Microchip MCP47FEB02 I2C driver in separate modules to add support for MCP48FEB02 SPI driver Ariana Lazar
2026-08-19 12:41 ` [PATCH v4 1/9] iio: dac: mcp47feb02: initialize dac_data field in channel data struct at probe Ariana Lazar
2026-08-19 14:17 ` Andy Shevchenko
2026-08-23 0:51 ` Jonathan Cameron [this message]
2026-08-19 12:41 ` [PATCH v4 2/9] iio: dac: mcp47feb02: correct gain bitshift " Ariana Lazar
2026-08-19 14:15 ` Andy Shevchenko
2026-08-19 12:41 ` [PATCH v4 3/9] iio: dac: mcp47feb02: correct false state case in store_eeprom_store Ariana Lazar
2026-08-19 14:18 ` Andy Shevchenko
2026-08-19 12:41 ` [PATCH v4 4/9] iio: dac: mcp47feb02: use dev_dbg for invalid label Ariana Lazar
2026-08-19 14:23 ` Andy Shevchenko
2026-08-19 12:41 ` [PATCH v4 5/9] iio: dac: mcp47feb02: correct typo from a comment Ariana Lazar
2026-08-19 12:41 ` [PATCH v4 6/9] iio: dac: mcp47feb02: rename command mask define Ariana Lazar
2026-08-19 12:41 ` [PATCH v4 7/9] iio: dac: mcp47feb02: refactor MCP47FEB02 I2C driver into two modules Ariana Lazar
2026-08-23 1:02 ` Jonathan Cameron
2026-08-19 12:41 ` [PATCH v4 8/9] dt-bindings: iio: dac: add support for MCP48FEB02 SPI Ariana Lazar
2026-08-19 12:41 ` [PATCH v4 9/9] iio: dac: add support for Microchip MCP48FEB02 Ariana Lazar
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