From: Jonathan Cameron <jic23@kernel.org>
To: Alexandru Ardelean <alexandru.ardelean@analog.com>
Cc: alexandre.belloni@bootlin.com, alexandre.torgue@st.com,
linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
ludovic.desroches@microchip.com, ak@it-klinger.de,
mcoquelin.stm32@gmail.com, eugen.hristev@microchip.com,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 3/8] iio: at91_adc: pass ref to IIO device via param for int function
Date: Sat, 16 May 2020 18:17:49 +0100 [thread overview]
Message-ID: <20200516181749.243c9515@archlinux> (raw)
In-Reply-To: <20200514131710.84201-4-alexandru.ardelean@analog.com>
On Thu, 14 May 2020 16:17:05 +0300
Alexandru Ardelean <alexandru.ardelean@analog.com> wrote:
> Since there will be some changes to how iio_priv_to_dev() is implemented,
> it could be that the helper becomes a bit slower, as it will be hidden away
> in the IIO core.
>
> For this driver, the IIO device can be passed directly as a parameter to
> the at91_ts_sample() function, thus making it immune to the change of
> iio_priv_to_dev().
> The function gets called in an interrupt context.
>
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
I wonder. Should we just pass the struct device? It's only used for
error printing I think, so we could make that explicit.
I'm not that bothered either way though.
Jonathan
> ---
> drivers/iio/adc/at91_adc.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index 0368b6dc6d60..5999defe47cd 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -287,13 +287,12 @@ static void handle_adc_eoc_trigger(int irq, struct iio_dev *idev)
> }
> }
>
> -static int at91_ts_sample(struct at91_adc_state *st)
> +static int at91_ts_sample(struct iio_dev *idev, struct at91_adc_state *st)
> {
> unsigned int xscale, yscale, reg, z1, z2;
> unsigned int x, y, pres, xpos, ypos;
> unsigned int rxp = 1;
> unsigned int factor = 1000;
> - struct iio_dev *idev = iio_priv_to_dev(st);
>
> unsigned int xyz_mask_bits = st->res;
> unsigned int xyz_mask = (1 << xyz_mask_bits) - 1;
> @@ -449,7 +448,7 @@ static irqreturn_t at91_adc_9x5_interrupt(int irq, void *private)
>
> if (status & AT91_ADC_ISR_PENS) {
> /* validate data by pen contact */
> - at91_ts_sample(st);
> + at91_ts_sample(idev, st);
> } else {
> /* triggered by event that is no pen contact, just read
> * them to clean the interrupt and discard all.
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next prev parent reply other threads:[~2020-05-16 17:17 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-14 13:17 [PATCH v2 0/8] iio: core: wrap IIO device into an iio_dev_opaque object Alexandru Ardelean
2020-05-14 13:17 ` [PATCH v2 1/8] iio: proximity: ping: pass reference to IIO device via call-stack Alexandru Ardelean
2020-05-16 17:12 ` Jonathan Cameron
2020-05-14 13:17 ` [PATCH v2 2/8] iio: at91-sama5d2_adc: pass ref to IIO device via param for int function Alexandru Ardelean
2020-05-16 17:15 ` Jonathan Cameron
2020-05-14 13:17 ` [PATCH v2 3/8] iio: at91_adc: " Alexandru Ardelean
2020-05-16 17:17 ` Jonathan Cameron [this message]
2020-05-18 8:32 ` Ardelean, Alexandru
2020-05-21 18:19 ` Jonathan Cameron
2020-05-14 13:17 ` [PATCH v2 4/8] iio: stm32-dfsdm-adc: pass iio device as arg for the interrupt handler Alexandru Ardelean
2020-05-16 17:20 ` Jonathan Cameron
2020-05-14 13:17 ` [PATCH v2 5/8] iio: stm32-adc: " Alexandru Ardelean
2020-05-16 17:21 ` Jonathan Cameron
2020-05-14 13:17 ` [PATCH v2 6/8] iio: core: wrap IIO device into an iio_dev_opaque object Alexandru Ardelean
2020-05-16 17:28 ` Jonathan Cameron
2020-05-14 13:17 ` [PATCH v2 7/8] iio: core: simplify alloc alignment code Alexandru Ardelean
2020-05-15 7:12 ` Sa, Nuno
2020-05-15 11:47 ` Ardelean, Alexandru
2020-05-15 12:37 ` Sa, Nuno
2020-05-16 17:30 ` Jonathan Cameron
2020-05-14 13:17 ` [PATCH v2 8/8] iio: core: move debugfs data on the private iio dev info Alexandru Ardelean
2020-05-22 6:58 ` [PATCH v2 0/8] iio: core: wrap IIO device into an iio_dev_opaque object Ardelean, Alexandru
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