v4.19.13 snapshot.
diff --git a/Documentation/spi/00-INDEX b/Documentation/spi/00-INDEX
new file mode 100644
index 0000000..8e4bb17
--- /dev/null
+++ b/Documentation/spi/00-INDEX
@@ -0,0 +1,16 @@
+00-INDEX
+ - this file.
+butterfly
+ - AVR Butterfly SPI driver overview and pin configuration.
+ep93xx_spi
+ - Basic EP93xx SPI driver configuration.
+pxa2xx
+ - PXA2xx SPI master controller build by spi_message fifo wq
+spidev
+ - Intro to the userspace API for spi devices
+spi-lm70llp
+ - Connecting an LM70-LLP sensor to the kernel via the SPI subsys.
+spi-sc18is602
+ - NXP SC18IS602/603 I2C-bus to SPI bridge
+spi-summary
+ - (Linux) SPI overview. If unsure about SPI or SPI in Linux, start here.