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Date: Wed, 31 Aug 2022 09:47:50 +0200 From: Vincent Whitchurch <vincent.whitchurch@...s.com> To: Jonathan Cameron <jic23@...nel.org> CC: kernel <kernel@...s.com>, "lars@...afoo.de" <lars@...afoo.de>, Axel Jonsson <Axel.Jonsson@...s.com>, "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 2/2] iio: adc: mcp320x: add triggered buffer support On Sun, Aug 28, 2022 at 07:24:30PM +0200, Jonathan Cameron wrote: > On Wed, 24 Aug 2022 12:40:02 +0200 > Vincent Whitchurch <vincent.whitchurch@...s.com> wrote: > > Add support for triggered buffers. Just read the channels in a loop to > > keep things simple. > > Just curious, but what other options are there? A quick datasheet scroll > through didn't seem to suggest you can overlap setup of next read with > reading out the previous (common on SPI ADCs). You're right that the hardware doesn't support any special method to read out multiple channels; I can mention that in the commit message. But I think you could construct a spi_message which a bunch of spi_transfers which toggle the CS appropriately between them to read out multiple channels in one go? (Note that the variants have different data formats, and many of the variants only have one channel.)
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