diff options
| author | Jack Chen <zenghuchen@google.com> | 2022-12-07 15:50:59 -0500 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2022-12-11 21:25:58 +0100 |
| commit | 672825cd2823a0cee4687ce80fef5b702ff3caa3 (patch) | |
| tree | da9b5a85074db5b7b58c626c9fd8463604f4c03e /drivers/i3c/master.c | |
| parent | 01744ce9f07f0b76b0b2d30adba2a7c104f1ff2a (diff) | |
i3c: export SETDASA method
Because not all I3C drivers have the hot-join feature ready, and
especially not all I3C devices support hot-join feature, exporting
SETDASA method could be useful. With this function, the I3C controller
could perform a DAA to I3C devices when users decide to turn these I3C
devices off and on again during run-time.
Tested: This change has been tested with turnning off an I3C device and
turning on it again during run-time. The device driver calls SETDASA
method to perform DAA to the device. And communication between I3C
controller and device is set up again correctly.
Signed-off-by: Jack Chen <zenghuchen@google.com>
Link: https://lore.kernel.org/r/20221207205059.3848851-1-zenghuchen@google.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/i3c/master.c')
| -rw-r--r-- | drivers/i3c/master.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 351c81a929a6..d7e6f6c99aea 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -2708,6 +2708,25 @@ int i3c_master_unregister(struct i3c_master_controller *master) } EXPORT_SYMBOL_GPL(i3c_master_unregister); +int i3c_dev_setdasa_locked(struct i3c_dev_desc *dev) +{ + struct i3c_master_controller *master; + + if (!dev) + return -ENOENT; + + master = i3c_dev_get_master(dev); + if (!master) + return -EINVAL; + + if (!dev->boardinfo || !dev->boardinfo->init_dyn_addr || + !dev->boardinfo->static_addr) + return -EINVAL; + + return i3c_master_setdasa_locked(master, dev->info.static_addr, + dev->boardinfo->init_dyn_addr); +} + int i3c_dev_do_priv_xfers_locked(struct i3c_dev_desc *dev, struct i3c_priv_xfer *xfers, int nxfers) |