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
@@ -462,6 +462,14 @@ 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);