GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-16 11:32:41 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

i2c: recovery: add get_bus_free callback

Browse source 
Some IP cores have an internal 'bus free' logic which may be more
advanced than just checking if SDA is high. Add a separate callback to
get this status. Filling it is optional.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2018-07-11 00:24:22 +02:00 • committed by Wolfram Sang
parent 0b71026c69
commit 7ca5f6be79
2 changed files with 26 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

3
include/linux/i2c.h
View file

@ -587,6 +587,8 @@ struct i2c_timings {
* @set_sda: This sets/clears the SDA line. This or get_sda() is mandatory for
* generic SCL recovery. Populated internally, if sda_gpio is a valid GPIO,
* for generic GPIO recovery.
* @get_bus_free: Returns the bus free state as seen from the IP core in case it
* has a more complex internal logic than just reading SDA. Optional.
* @prepare_recovery: This will be called before starting recovery. Platform may
* configure padmux here for SDA/SCL line or something else they want.
* @unprepare_recovery: This will be called after completing recovery. Platform
@ -601,6 +603,7 @@ struct i2c_bus_recovery_info {
void (*set_scl)(struct i2c_adapter *adap, int val);
int (*get_sda)(struct i2c_adapter *adap);
void (*set_sda)(struct i2c_adapter *adap, int val);
int (*get_bus_free)(struct i2c_adapter *adap);
void (*prepare_recovery)(struct i2c_adapter *adap);
void (*unprepare_recovery)(struct i2c_adapter *adap);