tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
staging:iio:adc:ad7280a: Use more conservative delays to allow 105C operation.
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>
Reviewed-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Link: https://lore.kernel.org/r/20220206190328.333093-20-jic23@kernel.org
+2
-2
+2
-2
drivers/staging/iio/adc/ad7280a.c
+2
-2
drivers/staging/iio/adc/ad7280a.c
···
137
137
#define AD7280A_DEVADDR_ALL 0x1F
138
138
139
139
static const unsigned short ad7280a_n_avg[4] = {1, 2, 4, 8};
140
-
static const unsigned short ad7280a_t_acq_ns[4] = {465, 1010, 1460, 1890};
140
+
static const unsigned short ad7280a_t_acq_ns[4] = {470, 1030, 1510, 1945};
141
141
142
142
/* 5-bit device address is sent LSB first */
143
143
static unsigned int ad7280a_devaddr(unsigned int addr)
···
869
869
*/
870
870
871
871
st->readback_delay_us =
872
-
((ad7280a_t_acq_ns[st->acquisition_time & 0x3] + 695) *
872
+
((ad7280a_t_acq_ns[st->acquisition_time & 0x3] + 720) *
873
873
(AD7280A_NUM_CH * ad7280a_n_avg[st->oversampling_ratio & 0x3])) -
874
874
ad7280a_t_acq_ns[st->acquisition_time & 0x3] + st->slave_num * 250;
875
875