diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2015-07-27 14:03:38 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2015-08-24 14:05:15 +0200 |
| commit | cfa0327b0d03091e0c47249c080e50e287be762d (patch) | |
| tree | 623f03aee6dc0bbdaada27b4f2cab5e4a7fd87fd /Documentation/i2c/slave-interface | |
| parent | 9bccc70a127cfe2a13e34d6b6e7300caae113f8f (diff) | |
| download | lwn-cfa0327b0d03091e0c47249c080e50e287be762d.tar.gz lwn-cfa0327b0d03091e0c47249c080e50e287be762d.zip | |
i2c: support 10 bit and slave addresses in sysfs 'new_device'
We now have seperate address spaces for 10 bit and we-are-slave clients.
Update the sysfs device instantiation method to support these types by
accepting the address offsets that are assigned to the extra address
spaces. Update the documentation, too.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'Documentation/i2c/slave-interface')
| -rw-r--r-- | Documentation/i2c/slave-interface | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/Documentation/i2c/slave-interface b/Documentation/i2c/slave-interface index 2dee4e2d62df..61ed05cd9531 100644 --- a/Documentation/i2c/slave-interface +++ b/Documentation/i2c/slave-interface @@ -31,10 +31,13 @@ User manual =========== I2C slave backends behave like standard I2C clients. So, you can instantiate -them as described in the document 'instantiating-devices'. A quick example for -instantiating the slave-eeprom driver from userspace at address 0x64 on bus 1: +them as described in the document 'instantiating-devices'. The only difference +is that i2c slave backends have their own address space. So, you have to add +0x1000 to the address you would originally request. An example for +instantiating the slave-eeprom driver from userspace at the 7 bit address 0x64 +on bus 1: - # echo slave-24c02 0x64 > /sys/bus/i2c/devices/i2c-1/new_device + # echo slave-24c02 0x1064 > /sys/bus/i2c/devices/i2c-1/new_device Each backend should come with separate documentation to describe its specific behaviour and setup. |