From: Jonathan Cameron <jic23@kernel.org> To: Alexandru Ardelean <alexandru.ardelean@analog.com> Cc: <linux-iio@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-stm32@st-md-mailman.stormreply.com>, <linux-kernel@vger.kernel.org>, <ludovic.desroches@microchip.com>, <eugen.hristev@microchip.com>, <nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>, <alexandre.torgue@st.com>, <mcoquelin.stm32@gmail.com>, <ak@it-klinger.de> 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.
WARNING: multiple messages have this Message-ID (diff)
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. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-05-16 17:17 UTC|newest] Thread overview: 44+ 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 ` Alexandru Ardelean 2020-05-14 13:17 ` [PATCH v2 1/8] iio: proximity: ping: pass reference to IIO device via call-stack Alexandru Ardelean 2020-05-14 13:17 ` Alexandru Ardelean 2020-05-16 17:12 ` Jonathan Cameron 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 2020-05-14 13:17 ` Alexandru Ardelean 2020-05-16 17:15 ` Jonathan Cameron 2020-05-16 17:15 ` Jonathan Cameron 2020-05-14 13:17 ` [PATCH v2 3/8] iio: at91_adc: " Alexandru Ardelean 2020-05-14 13:17 ` Alexandru Ardelean 2020-05-16 17:17 ` Jonathan Cameron [this message] 2020-05-16 17:17 ` Jonathan Cameron 2020-05-18 8:32 ` Ardelean, Alexandru 2020-05-18 8:32 ` Ardelean, Alexandru 2020-05-21 18:19 ` Jonathan Cameron 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 2020-05-14 13:17 ` Alexandru Ardelean 2020-05-16 17:20 ` Jonathan Cameron 2020-05-16 17:20 ` Jonathan Cameron 2020-05-14 13:17 ` [PATCH v2 5/8] iio: stm32-adc: " Alexandru Ardelean 2020-05-14 13:17 ` Alexandru Ardelean 2020-05-16 17:21 ` Jonathan Cameron 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 2020-05-14 13:17 ` Alexandru Ardelean 2020-05-16 17:28 ` Jonathan Cameron 2020-05-16 17:28 ` Jonathan Cameron 2020-05-14 13:17 ` [PATCH v2 7/8] iio: core: simplify alloc alignment code Alexandru Ardelean 2020-05-14 13:17 ` Alexandru Ardelean 2020-05-15 7:12 ` Sa, Nuno 2020-05-15 7:12 ` Sa, Nuno 2020-05-15 11:47 ` Ardelean, Alexandru 2020-05-15 11:47 ` Ardelean, Alexandru 2020-05-15 12:37 ` Sa, Nuno 2020-05-15 12:37 ` Sa, Nuno 2020-05-16 17:30 ` Jonathan Cameron 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 2020-05-14 13:17 ` Alexandru Ardelean 2020-05-22 6:58 ` [PATCH v2 0/8] iio: core: wrap IIO device into an iio_dev_opaque object Ardelean, Alexandru 2020-05-22 6:58 ` Ardelean, Alexandru
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