From: Jonathan Cameron <jic23@kernel.org>
To: linux-iio@vger.kernel.org, Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Cc: Hennerich@vger.kernel.org, Michael <Michael.Hennerich@analog.com>,
Nuno Sa <Nuno.Sa@analog.com>,
lars@metafoo.de, Jonathan Cameron <Jonathan.Cameron@huawei.com>
Subject: [PATCH v3 19/20] staging:iio:adc:ad7280a: Use more conservative delays to allow 105C operation.
Date: Sun, 6 Feb 2022 19:03:27 +0000 [thread overview]
Message-ID: <20220206190328.333093-20-jic23@kernel.org> (raw)
In-Reply-To: <20220206190328.333093-1-jic23@kernel.org>
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The datasheet provides timings for operating this device at up to 105
degrees centigrade. Adopt these more conservative timings.
Suggested-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
drivers/staging/iio/adc/ad7280a.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
index a7e16144b013..ef9d27759961 100644
--- a/drivers/staging/iio/adc/ad7280a.c
+++ b/drivers/staging/iio/adc/ad7280a.c
@@ -137,7 +137,7 @@
#define AD7280A_DEVADDR_ALL 0x1F
static const unsigned short ad7280a_n_avg[4] = {1, 2, 4, 8};
-static const unsigned short ad7280a_t_acq_ns[4] = {465, 1010, 1460, 1890};
+static const unsigned short ad7280a_t_acq_ns[4] = {470, 1030, 1510, 1945};
/* 5-bit device address is sent LSB first */
static unsigned int ad7280a_devaddr(unsigned int addr)
@@ -869,7 +869,7 @@ static void ad7280_update_delay(struct ad7280_state *st)
*/
st->readback_delay_us =
- ((ad7280a_t_acq_ns[st->acquisition_time & 0x3] + 695) *
+ ((ad7280a_t_acq_ns[st->acquisition_time & 0x3] + 720) *
(AD7280A_NUM_CH * ad7280a_n_avg[st->oversampling_ratio & 0x3])) -
ad7280a_t_acq_ns[st->acquisition_time & 0x3] + st->slave_num * 250;
--
2.35.1
next prev parent reply other threads:[~2022-02-06 18:58 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-06 19:03 [PATCH v3 00/20] iio:adc:ad7280a Cleanup and proposed staging graduation Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 01/20] staging:iio:adc:ad7280a: Fix handing of device address bit reversing Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 02/20] staging:iio:adc:ad7280a: Register define cleanup Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 03/20] staging:iio:adc:ad7280a: rename _read() to _read_reg() Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 04/20] staging:iio:adc:ad7280a: Split buff[2] into tx and rx parts Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 05/20] staging:iio:adc:ad7280a: Use bitfield ops to managed fields in transfers Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 06/20] staging:iio:adc:ad7280a: Switch to standard event control Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 07/20] staging:iio:adc:ad7280a: Standardize extended ABI naming Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 08/20] staging:iio:adc:ad7280a: Drop unused timestamp channel Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 09/20] staging:iio:adc:ad7280a: Trivial comment formatting cleanup Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 10/20] staging:iio:adc:ad7280a: Make oversampling_ratio a runtime control Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 11/20] staging:iio:adc:ad7280a: Cleanup includes Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 12/20] staging:iio:ad7280a: Reflect optionality of irq in ABI Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 13/20] staging:iio:adc:ad7280a: Use a local dev pointer to avoid &spi->dev Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 14/20] staging:iio:adc:ad7280a: Use device properties to replace platform data Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 15/20] staging:iio:adc:ad7280a: Drop buggy support for early termination of AUX alert Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 16/20] dt-bindings:iio:adc:ad7280a: Add binding Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 17/20] iio:adc:ad7280a: Document ABI for cell balance switches Jonathan Cameron
2022-02-06 19:03 ` [PATCH v3 18/20] staging:iio:adc:ad7280a: Remove shift from cb_mask state cache Jonathan Cameron
2022-02-06 19:03 ` Jonathan Cameron [this message]
2022-02-06 19:03 ` [PATCH v3 20/20] iio:adc:ad7280a: Move out of staging Jonathan Cameron
2022-02-13 20:11 ` [PATCH v3 00/20] iio:adc:ad7280a Cleanup and proposed staging graduation Marcelo Schmitt
2022-02-18 11:59 ` Jonathan Cameron
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