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platform/x86: mlx-platform: Add physical bus number auto detection

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mlx-platform does not provide a bus number to i2c-mlxcpld, assuming it
is always one. On some x86 systems, other i2c drivers may probe before
i2c-mlxcpld, causing bus one to be busy.

Make mlx-platform determine which adapter number is free prior to
activating i2c-mlxpld, adjusting the mux base numbers accordingly.
Update the mlxreg-hotplug pdata similarly.

This adds an explicit mlx-platform build dependency on I2C, update the
Kconfig accordingly. Add the missing REGMAP dependency while we're at
it.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
[dvhart: Rewrite commit message more concisely]
[dvhart: Add build dependencies]
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
This commit is contained in:
Vadim Pasternak
2018-02-13 22:09:36 +00:00
committed by Darren Hart (VMware)
parent f709e1bfb0
commit ef0f62264b
4 changed files with 62 additions and 6 deletions
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2
include/linux/platform_data/mlxreg.h
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@@ -130,6 +130,7 @@ struct mlxreg_core_platform_data {
* @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;
* @shift_nr: I2C adapter numbers must be incremented by this value;
*/
struct mlxreg_core_hotplug_platform_data {
struct mlxreg_core_item *items;
@@ -141,6 +142,7 @@ struct mlxreg_core_hotplug_platform_data {
u32 cell_low;
u32 mask_low;
int deferred_nr;
int shift_nr;
};
#endif /* __LINUX_PLATFORM_DATA_MLXREG_H */