From: Jonathan Cameron <jic23@kernel.org>
To: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
linux-iio@vger.kernel.org, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 13/16] iio: adc: max1027: Prepare re-using the EOC interrupt
Date: Mon, 30 Aug 2021 11:30:03 +0100 [thread overview]
Message-ID: <20210830112947.6f1806f5@jic23-huawei> (raw)
In-Reply-To: <20210818111139.330636-14-miquel.raynal@bootlin.com>
On Wed, 18 Aug 2021 13:11:36 +0200
Miquel Raynal <miquel.raynal@bootlin.com> wrote:
> Right now the driver only has hardware trigger support, which makes use
> of the End Of Conversion (EOC) interrupt by:
> - Enabling the external trigger
> - At completion of the conversion, run a generic handler
> - Push the data to the IIO subsystem by using the triggered buffer
> infrastructure, which may not only serve this purpose.
>
> In fact, the interrupt will fire for more reasons than just a hardware
> trigger condition, so make a dedicated interrupt handler which will be
> enhanced by the upcoming changes to handle more situations.
>
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
one suggestion inline.
> ---
> drivers/iio/adc/max1027.c | 22 ++++++++++++++++++++--
> 1 file changed, 20 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
> index 2d6485591761..8d86e77fb5db 100644
> --- a/drivers/iio/adc/max1027.c
> +++ b/drivers/iio/adc/max1027.c
> @@ -472,6 +472,24 @@ static int max1027_read_scan(struct iio_dev *indio_dev)
> return 0;
> }
>
> +static irqreturn_t max1027_eoc_irq_handler(int irq, void *private)
> +{
> + struct iio_dev *indio_dev = private;
> + struct max1027_state *st = iio_priv(indio_dev);
> + int ret = 0;
> +
> + if (st->cnvst_trigger) {
I missed this earlier, but it is very similar in purpose to the
logic used in iio_trigger_validate_own_device. Perhaps you could reuse that
rather than carrying an explicit variable to check for this?
> + ret = max1027_read_scan(indio_dev);
> + iio_trigger_notify_done(indio_dev->trig);
> + }
> +
> + if (ret)
> + dev_err(&indio_dev->dev,
> + "Cannot read scanned values (%d)\n", ret);
Perhaps better to move that into the if statement. I guess this may
make more sense later though!
> +
> + return IRQ_HANDLED;
> +}
> +
> static irqreturn_t max1027_trigger_handler(int irq, void *private)
> {
> struct iio_poll_func *pf = private;
> @@ -563,11 +581,11 @@ static int max1027_probe(struct spi_device *spi)
> }
>
> ret = devm_request_threaded_irq(&spi->dev, spi->irq,
> - iio_trigger_generic_data_rdy_poll,
> + max1027_eoc_irq_handler,
> NULL,
> IRQF_TRIGGER_FALLING,
> spi->dev.driver->name,
> - st->trig);
> + indio_dev);
> if (ret < 0) {
> dev_err(&indio_dev->dev, "Failed to allocate IRQ.\n");
> return ret;
next prev parent reply other threads:[~2021-08-30 10:26 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-18 11:11 [PATCH 00/16] Bring software triggers support to MAX1027-like ADCs Miquel Raynal
2021-08-18 11:11 ` [PATCH 01/16] iio: adc: max1027: Fix wrong shift with 12-bit devices Miquel Raynal
2021-08-20 7:02 ` Sa, Nuno
2021-08-30 9:57 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 02/16] iio: adc: max1027: Fix the number of max1X31 channels Miquel Raynal
2021-08-20 7:03 ` Sa, Nuno
2021-08-30 10:00 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 03/16] iio: adc: max1027: Push only the requested samples Miquel Raynal
2021-08-20 7:10 ` Sa, Nuno
2021-08-30 10:07 ` Jonathan Cameron
2021-08-30 10:49 ` Sa, Nuno
2021-08-30 14:29 ` Jonathan Cameron
2021-08-30 15:02 ` Sa, Nuno
2021-09-01 8:12 ` Miquel Raynal
2021-09-04 14:06 ` Jonathan Cameron
2021-09-06 8:59 ` Sa, Nuno
2021-09-06 16:56 ` Jonathan Cameron
2021-09-06 17:34 ` Miquel Raynal
2021-08-30 10:06 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 04/16] iio: adc: max1027: Lower conversion time Miquel Raynal
2021-08-20 7:12 ` Sa, Nuno
2021-08-30 10:10 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 05/16] iio: adc: max1027: Drop extra warning message Miquel Raynal
2021-08-20 7:12 ` Sa, Nuno
2021-08-30 10:12 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 06/16] iio: adc: max1027: Rename a helper Miquel Raynal
2021-08-20 7:13 ` Sa, Nuno
2021-08-18 11:11 ` [PATCH 07/16] iio: adc: max1027: Create a helper to configure the trigger Miquel Raynal
2021-08-20 7:16 ` Sa, Nuno
2021-08-30 10:16 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 08/16] iio: adc: max1027: Explain better how the trigger state gets changed Miquel Raynal
2021-08-20 7:17 ` Sa, Nuno
2021-08-18 11:11 ` [PATCH 09/16] iio: adc: max1027: Create a helper to configure the channels to scan Miquel Raynal
2021-08-20 7:18 ` Sa, Nuno
2021-08-18 11:11 ` [PATCH 10/16] iio: adc: max1027: Prevent single channel accesses during buffer reads Miquel Raynal
2021-08-20 7:20 ` Sa, Nuno
2021-08-20 7:30 ` Sa, Nuno
2021-08-30 10:20 ` Jonathan Cameron
2021-09-02 8:56 ` Miquel Raynal
2021-08-18 11:11 ` [PATCH 11/16] iio: adc: max1027: Separate the IRQ handler from the read logic Miquel Raynal
2021-08-20 7:23 ` Sa, Nuno
2021-09-02 8:55 ` Miquel Raynal
2021-09-04 14:08 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 12/16] iio: adc: max1027: Introduce an end of conversion helper Miquel Raynal
2021-08-20 7:28 ` Sa, Nuno
2021-09-02 9:26 ` Miquel Raynal
2021-08-30 10:34 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 13/16] iio: adc: max1027: Prepare re-using the EOC interrupt Miquel Raynal
2021-08-20 7:31 ` Sa, Nuno
2021-08-30 10:30 ` Jonathan Cameron [this message]
2021-08-30 10:47 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 14/16] iio: adc: max1027: Consolidate the end of conversion helper Miquel Raynal
2021-08-20 7:45 ` Sa, Nuno
2021-08-30 10:37 ` Jonathan Cameron
2021-08-30 12:44 ` Sa, Nuno
2021-08-30 14:32 ` Jonathan Cameron
2021-09-02 15:12 ` Miquel Raynal
2021-09-03 14:28 ` Sa, Nuno
2021-09-03 14:46 ` Miquel Raynal
2021-09-05 9:41 ` Jonathan Cameron
2021-09-06 9:12 ` Sa, Nuno
2021-09-06 9:30 ` Sa, Nuno
2021-08-18 11:11 ` [PATCH 15/16] iio: adc: max1027: Support software triggers Miquel Raynal
2021-08-20 7:58 ` Sa, Nuno
2021-09-02 12:25 ` Miquel Raynal
2021-09-03 14:20 ` Sa, Nuno
2021-08-30 10:50 ` Jonathan Cameron
2021-09-02 15:21 ` Miquel Raynal
2021-09-05 9:43 ` Jonathan Cameron
2021-08-18 11:11 ` [PATCH 16/16] iio: adc: max1027: Enable software triggers to be used without IRQ Miquel Raynal
2021-08-30 10:54 ` Jonathan Cameron
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