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i2c: mux: mlxcpld: Add callback to notify mux creation completion 

Add notification to inform caller that mux objects array has been
created. It allows to user, invoked platform device registration for
"i2c-mux-mlxcpld" driver, to be notified that mux infrastructure is
available, and thus some devices could be connected to this
infrastructure.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Vadim Pasternak 2021-02-08 22:16:06 +02:00 committed by Wolfram Sang
parent 699c050654
commit a39bd92e92
2 changed files with 9 additions and 0 deletions
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4
drivers/i2c/muxes/i2c-mux-mlxcpld.c
View File

@ -159,6 +159,10 @@ static int mlxcpld_mux_probe(struct platform_device *pdev)
goto virt_reg_failed;
}
/* Notify caller when all channels' adapters are created. */
if (pdata->completion_notify)
pdata->completion_notify(pdata->handle, muxc->parent, muxc->adapter);
return 0;
virt_reg_failed:

5
include/linux/platform_data/mlxcpld.h
View File

@ -15,12 +15,17 @@
* @num_adaps - number of adapters
* @sel_reg_addr - mux select register offset in CPLD space
* @reg_size: register size in bytes
* @handle: handle to be passed by callback
* @completion_notify: callback to notify when all the adapters are created
*/
struct mlxcpld_mux_plat_data {
int *chan_ids;
int num_adaps;
int sel_reg_addr;
u8 reg_size;
void *handle;
int (*completion_notify)(void *handle, struct i2c_adapter *parent,
struct i2c_adapter *adapters[]);
};
#endif /* _LINUX_I2C_MLXCPLD_H */