From 48fb57697ee620945b6deca3d688b797acd95450 Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Sun, 6 Feb 2022 19:03:27 +0000 Subject: [PATCH] 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 Signed-off-by: Jonathan Cameron Reviewed-by: Marcelo Schmitt Link: https://lore.kernel.org/r/20220206190328.333093-20-jic23@kernel.org --- 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 a7e1614..ef9d277 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; -- 2.7.4