diff options
| author | Bhuvanchandra DV <bhuvanchandra.dv@toradex.com> | 2016-03-30 01:20:42 +0530 |
|---|---|---|
| committer | Stefan Agner <stefan.agner@toradex.com> | 2016-03-29 22:56:47 -0700 |
| commit | b84a7643279332aca39d4be85d47c0734802c91e (patch) | |
| tree | 08987b425b9cd0b5402dd22e6ec0836a2dac3b4e /Documentation | |
| parent | 1df133c0db64d633bbb9b238aa0e1588e2c5e7d6 (diff) | |
spi: spidev: Use 'new_id' sysfs file for enabling spidev
Use sysfs new_id file to enable spidev at runtime. new_id file accepts
bus number and chip select in 'B.C' format.
With reference to the last ML discussion here[1] regarding the solution
for spidev with device trees. This patch adds support to load spidevB.C
via sysfs new_id file as suggested by Greg.
[1] http://thread.gmane.org/gmane.linux.kernel.spi.devel/20331/focus=20369
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
[fixed error handling]
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-spi-spidev | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-spi-spidev b/Documentation/ABI/testing/sysfs-bus-spi-spidev new file mode 100644 index 000000000000..3f6e092f7c62 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-spi-spidev @@ -0,0 +1,8 @@ +What: /sys/bus/spi/drivers/spidev/new_id +Date: March 2016 +Description: + This allows to load spidev at runtime. new_id file accepts bus + number and chip select in 'B.C' format. + e.g. + To load spidev1.1 at runtime: + $ echo 1.1 > /sys/bus/spi/drivers/spidev/new_id |