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platform/x86: mlx-platform: Add deffered bus functionality

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mlx-platform activates i2c-mux-reg, which creates buses needed by
mlxreg-hotplug. If the mlxreg-hotplug probe runs before the i2c-mux-reg
probe completes, it may attempt to connect a device to an adapter number
that has not been created yet, and fail.

Make mlx-platform driver record the highest bus number in mlxreg-hotplug
platform data and defer mlxreg-hotplug probe until all the buses are
created.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
[dvhart: rewrite commit message more concisely]
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
This commit is contained in:
Vadim Pasternak
2018-02-13 22:09:34 +00:00
committed by Darren Hart (VMware)
parent d066f144d6
commit d726f6b199
3 changed files with 19 additions and 0 deletions
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2
include/linux/platform_data/mlxreg.h
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@@ -129,6 +129,7 @@ struct mlxreg_core_platform_data {
* @mask: top aggregation interrupt common mask;
* @cell_low: location of low aggregation interrupt register;
* @mask_low: low aggregation interrupt common mask;
* @deferred_nr: I2C adapter number must be exist prior probing execution;
*/
struct mlxreg_core_hotplug_platform_data {
struct mlxreg_core_item *items;
@@ -139,6 +140,7 @@ struct mlxreg_core_hotplug_platform_data {
u32 mask;
u32 cell_low;
u32 mask_low;
int deferred_nr;
};
#endif /* __LINUX_PLATFORM_DATA_MLXREG_H */