From: Claudiu Beznea <claudiu.beznea@microchip.com>
To: <eugen.hristev@microchip.com>, <jic23@kernel.org>,
<lars@metafoo.de>, <nicolas.ferre@microchip.com>,
<alexandre.belloni@bootlin.com>, <robh+dt@kernel.org>,
<krzk+dt@kernel.org>, <ludovic.desroches@atmel.com>
Cc: <linux-iio@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Claudiu Beznea <claudiu.beznea@microchip.com>
Subject: [PATCH 11/16] iio: adc: at91-sama5d2_adc: add locking parameter to at91_adc_read_info_raw()
Date: Thu, 9 Jun 2022 11:32:08 +0300 [thread overview]
Message-ID: <20220609083213.1795019-12-claudiu.beznea@microchip.com> (raw)
In-Reply-To: <20220609083213.1795019-1-claudiu.beznea@microchip.com>
Add a parameter to at91_adc_read_info_raw() to specify if st->lock mutex
need to be acquired. This prepares for the addition of temperature sensor
code which will re-use at91_adc_read_info_raw() function to read 2 voltages
for determining the real temperature.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
drivers/iio/adc/at91-sama5d2_adc.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index 1283bcf4e682..8f8fef42de84 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1583,7 +1583,8 @@ static irqreturn_t at91_adc_interrupt(int irq, void *private)
}
static int at91_adc_read_info_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan, int *val)
+ struct iio_chan_spec const *chan, int *val,
+ bool lock)
{
struct at91_adc_state *st = iio_priv(indio_dev);
int (*fn)(struct at91_adc_state *, int, u16 *) = NULL;
@@ -1602,13 +1603,15 @@ static int at91_adc_read_info_raw(struct iio_dev *indio_dev,
ret = iio_device_claim_direct_mode(indio_dev);
if (ret)
return ret;
- mutex_lock(&st->lock);
+ if (lock)
+ mutex_lock(&st->lock);
if (fn) {
ret = fn(st, chan->channel, &tmp_val);
*val = tmp_val;
ret = at91_adc_adjust_val_osr(st, val);
- mutex_unlock(&st->lock);
+ if (lock)
+ mutex_unlock(&st->lock);
iio_device_release_direct_mode(indio_dev);
return ret;
@@ -1644,7 +1647,8 @@ static int at91_adc_read_info_raw(struct iio_dev *indio_dev,
/* Needed to ACK the DRDY interruption */
at91_adc_readl(st, LCDR);
- mutex_unlock(&st->lock);
+ if (lock)
+ mutex_unlock(&st->lock);
iio_device_release_direct_mode(indio_dev);
return ret;
@@ -1658,7 +1662,8 @@ static int at91_adc_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
- return at91_adc_read_info_raw(indio_dev, chan, val);
+ return at91_adc_read_info_raw(indio_dev, chan, val, true);
+
case IIO_CHAN_INFO_SCALE:
*val = st->vref_uv / 1000;
if (chan->differential)
--
2.34.1
next prev parent reply other threads:[~2022-06-09 8:32 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-09 8:31 [PATCH 00/16] iio: adc: at91-sama5d2_adc: add support for temperature sensor Claudiu Beznea
2022-06-09 8:31 ` [PATCH 01/16] iio: adc: at91-sama5d2_adc: fix AT91_SAMA5D2_MR_TRACKTIM_MAX Claudiu Beznea
2022-06-09 8:31 ` [PATCH 02/16] iio: adc: at91-sama5d2_adc: lock around oversampling and sample freq Claudiu Beznea
2022-06-11 17:30 ` Jonathan Cameron
2022-06-14 8:19 ` Claudiu.Beznea
2022-06-09 8:32 ` [PATCH 03/16] iio: adc: at91-sama5d2_adc: exit from write_raw() when buffers are enabled Claudiu Beznea
2022-06-11 17:33 ` Jonathan Cameron
2022-06-14 8:19 ` Claudiu.Beznea
2022-06-09 8:32 ` [PATCH 04/16] iio: adc: at91-sama5d2_adc: handle different EMR.OSR for different hw versions Claudiu Beznea
2022-06-11 17:46 ` Jonathan Cameron
2022-06-14 8:20 ` Claudiu.Beznea
2022-06-09 8:32 ` [PATCH 05/16] iio: adc: at91-sama5d2_adc: adjust osr based on specific platform data Claudiu Beznea
2022-06-09 8:32 ` [PATCH 06/16] iio: adc: at91-sama5d2_adc: add 64 and 256 oversampling ratio Claudiu Beznea
2022-06-11 17:47 ` Jonathan Cameron
2022-06-14 8:22 ` Claudiu.Beznea
2022-06-09 8:32 ` [PATCH 07/16] iio: adc: at91-sama5d2_adc: simplify the code in at91_adc_read_info_raw() Claudiu Beznea
2022-06-11 17:54 ` Jonathan Cameron
2022-06-14 8:49 ` Claudiu.Beznea
2022-06-14 12:00 ` Jonathan Cameron
2022-06-09 8:32 ` [PATCH 08/16] iio: adc: at91-sama5d2_adc: move oversampling storage in its function Claudiu Beznea
2022-06-09 8:32 ` [PATCH 09/16] iio: adc: at91-sama5d2_adc: update trackx on emr Claudiu Beznea
2022-06-09 8:32 ` [PATCH 10/16] iio: adc: at91-sama5d2_adc: add startup and tracktim as parameter for at91_adc_setup_samp_freq() Claudiu Beznea
2022-06-09 8:32 ` Claudiu Beznea [this message]
2022-06-11 17:58 ` [PATCH 11/16] iio: adc: at91-sama5d2_adc: add locking parameter to at91_adc_read_info_raw() Jonathan Cameron
2022-06-14 8:50 ` Claudiu.Beznea
2022-06-14 12:02 ` Jonathan Cameron
2022-06-09 8:32 ` [PATCH 12/16] dt-bindings: iio: adc: at91-sama5d2_adc: add id for temperature channel Claudiu Beznea
2022-06-16 16:00 ` Rob Herring
2022-06-09 8:32 ` [PATCH 13/16] iio: adc: at91-sama5d2_adc: add support for temperature sensor Claudiu Beznea
2022-06-11 18:15 ` Jonathan Cameron
2022-06-14 10:13 ` Claudiu.Beznea
2022-06-14 12:10 ` Jonathan Cameron
2022-06-09 8:32 ` [PATCH 14/16] iio: adc: at91-sama5d2_adc: add empty line after functions Claudiu Beznea
2022-06-09 8:32 ` [PATCH 15/16] iio: adc: at91-sama5d2_adc: add runtime pm support Claudiu Beznea
2022-06-11 16:48 ` Jonathan Cameron
2022-06-14 10:40 ` Claudiu.Beznea
2022-06-14 12:14 ` Jonathan Cameron
2022-06-09 8:32 ` [PATCH 16/16] iio: adc: at91-sama5d2_adc: use pm_ptr() Claudiu Beznea
2022-06-11 16:40 ` Jonathan Cameron
2022-06-11 18:16 ` [PATCH 00/16] iio: adc: at91-sama5d2_adc: add support for temperature sensor Jonathan Cameron
2022-06-14 10:41 ` Claudiu.Beznea
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