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-rw-r--r--Documentation/spi/spi-summary3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/spi/spi-summary b/Documentation/spi/spi-summary
index d1824b399b2d..b4d15e409cfe 100644
--- a/Documentation/spi/spi-summary
+++ b/Documentation/spi/spi-summary
@@ -181,6 +181,9 @@ shows up in sysfs in several locations:
controller managing bus "B". All spiB.* devices share one
physical SPI bus segment, with SCLK, MOSI, and MISO.
+ /sys/class/spi_master/spiB/num_chipselect ... exposes the maximum
+ number of chipselects a SPI master can support.
+
Note that the actual location of the controller's class state depends
on whether you enabled CONFIG_SYSFS_DEPRECATED or not. At this time,
the only class-specific state is the bus number ("B" in "spiB"), so