From b0e85f95e30d4d2dc22ea123a30dba36406879a1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nuno=20S=C3=A1?= <nuno.sa@analog.com>
Date: Fri, 14 Jan 2022 14:26:08 +0100
Subject: [PATCH] iio:imu:adis16480: fix buffering for devices with no burst mode
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Git-commit: b0e85f95e30d4d2dc22ea123a30dba36406879a1
Patch-mainline: v5.17-rc6
References: git-fixes

The trigger handler defined in the driver assumes that burst mode is
being used. Hence, for devices that do not support it, we have to use
the adis library default trigger implementation.

Tested-by: Julia Pineda <julia.pineda@analog.com>
Fixes: 941f130881fa9 ("iio: adis16480: support burst read function")
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220114132608.241-1-nuno.sa@analog.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/iio/imu/adis16480.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
index ed129321a14d..f9b4540db1f4 100644
--- a/drivers/iio/imu/adis16480.c
+++ b/drivers/iio/imu/adis16480.c
@@ -1403,6 +1403,7 @@ static int adis16480_probe(struct spi_device *spi)
 {
 	const struct spi_device_id *id = spi_get_device_id(spi);
 	const struct adis_data *adis16480_data;
+	irq_handler_t trigger_handler = NULL;
 	struct iio_dev *indio_dev;
 	struct adis16480 *st;
 	int ret;
@@ -1474,8 +1475,12 @@ static int adis16480_probe(struct spi_device *spi)
 		st->clk_freq = st->chip_info->int_clk;
 	}
 
+	/* Only use our trigger handler if burst mode is supported */
+	if (adis16480_data->burst_len)
+		trigger_handler = adis16480_trigger_handler;
+
 	ret = devm_adis_setup_buffer_and_trigger(&st->adis, indio_dev,
-						 adis16480_trigger_handler);
+						 trigger_handler);
 	if (ret)
 		return ret;
 
-- 
2.31.1