linux-kernel - [PATCH v4 02/19] iio: accel: bma220: relax constraints during probe()

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Message-Id: <20251005-b4-bma220_improvements-v4-2-0f449ba31585@subdimension.ro>
Date: Sun, 05 Oct 2025 16:12:11 +0300
From: Petre Rodan <petre.rodan@...dimension.ro>
To: Jonathan Cameron <jic23@...nel.org>, 
 David Lechner <dlechner@...libre.com>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 linux-iio@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org
Subject: [PATCH v4 02/19] iio: accel: bma220: relax constraints during
 probe()

Do not return error if the chip id being read is not the expected one.

Signed-off-by: Petre Rodan <petre.rodan@...dimension.ro>
---
v4 - split from bigger patch (Jonathan)
---
 drivers/iio/accel/bma220_spi.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/accel/bma220_spi.c b/drivers/iio/accel/bma220_spi.c
index 505ad70912571ba629f91e56a92898d8320e976f..02ee6b4d51c0816a88ac258f0e5107111ec2a2bc 100644
--- a/drivers/iio/accel/bma220_spi.c
+++ b/drivers/iio/accel/bma220_spi.c
@@ -202,10 +202,15 @@ static const struct iio_info bma220_info = {
 static int bma220_init(struct spi_device *spi)
 {
 	int ret;
+	struct device *dev = &spi->dev;
 
 	ret = bma220_read_reg(spi, BMA220_REG_ID);
+	if (ret < 0)
+		return dev_err_probe(dev, ret,
+				     "Failed to read chip id register\n");
+
 	if (ret != BMA220_CHIP_ID)
-		return -ENODEV;
+		dev_info(dev, "Unknown chip found: 0x%02x\n", ret);
 
 	/* Make sure the chip is powered on */
 	ret = bma220_read_reg(spi, BMA220_REG_SUSPEND);

-- 
2.49.1