From db033831b4f5589f9fcbadb837614a7c4eac0308 Mon Sep 17 00:00:00 2001
From: Miquel Raynal <miquel.raynal@bootlin.com>
Date: Fri, 11 Oct 2019 16:43:42 +0200
Subject: [PATCH] iio: adc: max1027: Reset the device at probe time
Git-commit: db033831b4f5589f9fcbadb837614a7c4eac0308
Patch-mainline: v5.5-rc1
References: git-fixes
All the registers are configured by the driver, let's reset the chip
at probe time, avoiding any conflict with a possible earlier
configuration.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/iio/adc/max1027.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -457,6 +457,14 @@ static int max1027_probe(struct spi_devi
goto fail_dev_register;
}
+ /* Internal reset */
+ st->reg = MAX1027_RST_REG;
+ ret = spi_write(st->spi, &st->reg, 1);
+ if (ret < 0) {
+ dev_err(&indio_dev->dev, "Failed to reset the ADC\n");
+ return ret;
+ }
+
/* Disable averaging */
st->reg = MAX1027_AVG_REG;
ret = spi_write(st->spi, &st->reg, 1);