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-rw-r--r--drivers/spi/spi-bitbang-txrx.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/spi/spi-bitbang-txrx.h b/drivers/spi/spi-bitbang-txrx.h
index 47bb9b898dfd..ae61d72c7d28 100644
--- a/drivers/spi/spi-bitbang-txrx.h
+++ b/drivers/spi/spi-bitbang-txrx.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Mix this utility code with some glue code to get one of several types of
* simple SPI master driver. Two do polled word-at-a-time I/O:

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