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Date: Fri, 23 Feb 2024 15:16:04 +0100
From: Nuno Sá <noname.nuno@...il.com>
To: Dumitru Ceclan <mitrutzceclan@...il.com>
Cc: linus.walleij@...aro.org, brgl@...ev.pl, andy@...nel.org,
linux-gpio@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>, Jonathan
Cameron <jic23@...nel.org>, Rob Herring <robh+dt@...nel.org>, Krzysztof
Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley
<conor+dt@...nel.org>, Michael Walle <michael@...le.cc>, Andy Shevchenko
<andy.shevchenko@...il.com>, Arnd Bergmann <arnd@...db.de>, ChiaEn Wu
<chiaen_wu@...htek.com>, Niklas Schnelle <schnelle@...ux.ibm.com>, Leonard
Göhrs <l.goehrs@...gutronix.de>, Mike Looijmans
<mike.looijmans@...ic.nl>, Haibo Chen <haibo.chen@....com>, Hugo Villeneuve
<hvilleneuve@...onoff.com>, David Lechner <dlechner@...libre.com>, Ceclan
Dumitru <dumitru.ceclan@...log.com>, linux-iio@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v15 2/3] iio: adc: ad_sigma_delta: Add optional irq
selection
On Fri, 2024-02-23 at 15:37 +0200, Dumitru Ceclan wrote:
> Add optional irq_num attribute to ad_sigma_delta_info structure for
> selecting the used interrupt line for ADC's conversion completion.
>
> Signed-off-by: Dumitru Ceclan <mitrutzceclan@...il.com>
> ---
Reviewed-by: Nuno Sa <nuno.sa@...log.com>
> V15->V14
> - Uppercase ADC acronym in commit message
> - Rename irq_num to irq_line, change type to int
> V13->V14
> - Invert logic checking the presence of the optional irq_num attribute
> V1->V12
> <Not present>
> drivers/iio/adc/ad_sigma_delta.c | 23 ++++++++++++++---------
> include/linux/iio/adc/ad_sigma_delta.h | 3 +++
> 2 files changed, 17 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/iio/adc/ad_sigma_delta.c
> b/drivers/iio/adc/ad_sigma_delta.c
> index 7e2192870743..03c170b638a8 100644
> --- a/drivers/iio/adc/ad_sigma_delta.c
> +++ b/drivers/iio/adc/ad_sigma_delta.c
> @@ -222,11 +222,11 @@ int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta,
> goto out;
>
> sigma_delta->irq_dis = false;
> - enable_irq(sigma_delta->spi->irq);
> + enable_irq(sigma_delta->irq_line);
> timeout = wait_for_completion_timeout(&sigma_delta->completion, 2 *
> HZ);
> if (timeout == 0) {
> sigma_delta->irq_dis = true;
> - disable_irq_nosync(sigma_delta->spi->irq);
> + disable_irq_nosync(sigma_delta->irq_line);
> ret = -EIO;
> } else {
> ret = 0;
> @@ -295,7 +295,7 @@ int ad_sigma_delta_single_conversion(struct iio_dev
> *indio_dev,
> ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_SINGLE);
>
> sigma_delta->irq_dis = false;
> - enable_irq(sigma_delta->spi->irq);
> + enable_irq(sigma_delta->irq_line);
> ret = wait_for_completion_interruptible_timeout(
> &sigma_delta->completion, HZ);
>
> @@ -315,7 +315,7 @@ int ad_sigma_delta_single_conversion(struct iio_dev
> *indio_dev,
>
> out:
> if (!sigma_delta->irq_dis) {
> - disable_irq_nosync(sigma_delta->spi->irq);
> + disable_irq_nosync(sigma_delta->irq_line);
> sigma_delta->irq_dis = true;
> }
>
> @@ -396,7 +396,7 @@ static int ad_sd_buffer_postenable(struct iio_dev
> *indio_dev)
> goto err_unlock;
>
> sigma_delta->irq_dis = false;
> - enable_irq(sigma_delta->spi->irq);
> + enable_irq(sigma_delta->irq_line);
>
> return 0;
>
> @@ -414,7 +414,7 @@ static int ad_sd_buffer_postdisable(struct iio_dev
> *indio_dev)
> wait_for_completion_timeout(&sigma_delta->completion, HZ);
>
> if (!sigma_delta->irq_dis) {
> - disable_irq_nosync(sigma_delta->spi->irq);
> + disable_irq_nosync(sigma_delta->irq_line);
> sigma_delta->irq_dis = true;
> }
>
> @@ -516,7 +516,7 @@ static irqreturn_t ad_sd_trigger_handler(int irq, void *p)
> irq_handled:
> iio_trigger_notify_done(indio_dev->trig);
> sigma_delta->irq_dis = false;
> - enable_irq(sigma_delta->spi->irq);
> + enable_irq(sigma_delta->irq_line);
>
> return IRQ_HANDLED;
> }
> @@ -586,9 +586,9 @@ static int devm_ad_sd_probe_trigger(struct device *dev,
> struct iio_dev *indio_de
> sigma_delta->irq_dis = true;
>
> /* the IRQ core clears IRQ_DISABLE_UNLAZY flag when freeing an IRQ */
> - irq_set_status_flags(sigma_delta->spi->irq, IRQ_DISABLE_UNLAZY);
> + irq_set_status_flags(sigma_delta->irq_line, IRQ_DISABLE_UNLAZY);
>
> - ret = devm_request_irq(dev, sigma_delta->spi->irq,
> + ret = devm_request_irq(dev, sigma_delta->irq_line,
> ad_sd_data_rdy_trig_poll,
> sigma_delta->info->irq_flags | IRQF_NO_AUTOEN,
> indio_dev->name,
> @@ -668,6 +668,11 @@ int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct
> iio_dev *indio_dev,
> }
> }
>
> + if (info->irq_line)
> + sigma_delta->irq_line = info->irq_line;
> + else
> + sigma_delta->irq_line = spi->irq;
> +
> iio_device_set_drvdata(indio_dev, sigma_delta);
>
> return 0;
> diff --git a/include/linux/iio/adc/ad_sigma_delta.h
> b/include/linux/iio/adc/ad_sigma_delta.h
> index 7852f6c9a714..576eb617939d 100644
> --- a/include/linux/iio/adc/ad_sigma_delta.h
> +++ b/include/linux/iio/adc/ad_sigma_delta.h
> @@ -45,6 +45,7 @@ struct iio_dev;
> * @data_reg: Address of the data register, if 0 the default address of 0x3
> will
> * be used.
> * @irq_flags: flags for the interrupt used by the triggered buffer
> + * @irq_line: IRQ for reading conversions. If 0, spi->irq will be used
> * @num_slots: Number of sequencer slots
> */
> struct ad_sigma_delta_info {
> @@ -60,6 +61,7 @@ struct ad_sigma_delta_info {
> unsigned int data_reg;
> unsigned long irq_flags;
> unsigned int num_slots;
> + int irq_line;
> };
>
> /**
> @@ -87,6 +89,7 @@ struct ad_sigma_delta {
> unsigned int active_slots;
> unsigned int current_slot;
> unsigned int num_slots;
> + int irq_line;
> bool status_appended;
> /* map slots to channels in order to know what to expect from devices
> */
> unsigned int *slots;
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