linux-kernel - [PATCH] iio: adc: ad_sigma_delta: select CONFIG_IIO_BUFFER

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Message-Id: <20250715064053.3484105-1-arnd@kernel.org>
Date: Tue, 15 Jul 2025 08:40:44 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: Jonathan Cameron <jic23@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Nuno Sá <nuno.sa@...log.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	Andy Shevchenko <andy@...nel.org>,
	Marcelo Schmitt <marcelo.schmitt@...log.com>,
	Javier Carrasco <javier.carrasco.cruz@...il.com>,
	Matti Vaittinen <mazziesaccount@...il.com>,
	Tobias Sperling <tobias.sperling@...ting.com>,
	Antoniu Miclaus <antoniu.miclaus@...log.com>,
	linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] iio: adc: ad_sigma_delta: select CONFIG_IIO_BUFFER_DMAENGINE

From: Arnd Bergmann <arnd@...db.de>

The newly added support for SPI offloading causes a link error
when the dmaengine buffer helpers are unavailable:

arm-linux-gnueabi-ld: drivers/iio/adc/ad_sigma_delta.o: in function `devm_ad_sd_setup_buffer_and_trigger':
ad_sigma_delta.c:(.text+0x6b8): undefined reference to `devm_iio_dmaengine_buffer_setup_with_handle'

Fixes: 219da3ea842a ("iio: adc: ad_sigma_delta: add SPI offload support")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/iio/adc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index d43edc7b0c0f..e2649739a2da 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -23,6 +23,7 @@ config AD_SIGMA_DELTA
 	tristate
 	select IIO_BUFFER
 	select IIO_TRIGGERED_BUFFER
+	select IIO_BUFFER_DMAENGINE
 
 config AD4000
 	tristate "Analog Devices AD4000 ADC Driver"
-- 
2.39.5