[PATCH v6 03/16] iio: adc: ad4134: Apply reset recovery wait time
From: Marcelo Schmitt
Date: Fri Oct 23 2026 - 18:36:20 EST
Add a reset recovery wait time to avoid any SPI transfer from running too
soon during device probe.
Reviewed-by: Joshua Crofts <joshua.crofts1@xxxxxxxxx>
Fixes: e0bc6d7e2584 ("iio: adc: Initial support for AD4134")
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
---
Change log v5 -> v6:
- Correct reset time to microseconds.
drivers/iio/adc/ad4134.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/ad4134.c b/drivers/iio/adc/ad4134.c
index 40b27b01f126..7d9e0706bea4 100644
--- a/drivers/iio/adc/ad4134.c
+++ b/drivers/iio/adc/ad4134.c
@@ -26,7 +26,7 @@
#include <linux/unaligned.h>
#include <linux/units.h>
-#define AD4134_RESET_TIME_US (10 * USEC_PER_SEC)
+#define AD4134_RESET_TIME_US 10
#define AD4134_REG_READ_MASK BIT(7)
#define AD4134_SPI_MAX_XFER_LEN 3
@@ -442,6 +442,7 @@ static int ad4134_probe(struct spi_device *spi)
return dev_err_probe(dev, PTR_ERR(rst),
"failed to get and deassert reset\n");
+ fsleep(AD4134_RESET_TIME_US);
crc8_populate_msb(ad4134_spi_crc_table, AD4134_SPI_CRC_POLYNOM);
st->regmap = devm_regmap_init(dev, NULL, st, &ad4134_regmap_config);
--
2.53.0