diff options
| -rw-r--r-- | Documentation/spi/spi-summary.rst | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/Documentation/spi/spi-summary.rst b/Documentation/spi/spi-summary.rst index 3c95ae322fb1..33f05901ccf3 100644 --- a/Documentation/spi/spi-summary.rst +++ b/Documentation/spi/spi-summary.rst @@ -178,10 +178,10 @@ shows up in sysfs in several locations:: /sys/bus/spi/drivers/D ... driver for one or more spi*.* devices - /sys/class/spi_master/spiB ... symlink (or actual device node) to - a logical node which could hold class related state for the SPI - master controller managing bus "B". All spiB.* devices share one - physical SPI bus segment, with SCLK, MOSI, and MISO. + /sys/class/spi_master/spiB ... symlink to a logical node which could hold + class related state for the SPI master controller managing bus "B". + All spiB.* devices share one physical SPI bus segment, with SCLK, + MOSI, and MISO. /sys/devices/.../CTLR/slave ... virtual file for (un)registering the slave device for an SPI slave controller. @@ -191,16 +191,13 @@ shows up in sysfs in several locations:: Reading from this file shows the name of the slave device ("(null)" if not registered). - /sys/class/spi_slave/spiB ... symlink (or actual device node) to - a logical node which could hold class related state for the SPI - slave controller on bus "B". When registered, a single spiB.* - device is present here, possible sharing the physical SPI bus - segment with other SPI slave devices. + /sys/class/spi_slave/spiB ... symlink to a logical node which could hold + class related state for the SPI slave controller on bus "B". When + registered, a single spiB.* device is present here, possible sharing + the physical SPI bus segment with other SPI slave devices. -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 -those /sys/class entries are only useful to quickly identify busses. +At this time, the only class-specific state is the bus number ("B" in "spiB"), +so those /sys/class entries are only useful to quickly identify busses. How does board-specific init code declare SPI devices? |