[U-Boot] [PATCH v2 0/7] Align U-Boot I2C DM bus ID handling with Linux

[Michal Simek]

U-Boot with I2C_DM enabled is not capable to list i2c busses connected
to i2c mux. For getting this work there is a need to find out highest
alias ID and use this uniq number for new buses connected to I2C mux.
This series is making this happen.

There is only one missing piece which is that also i2c controllers which
are not listed in DT are not using this feature.

Removing setting up aliases from i2c mux code and unifying it in the
same code ensures that numbering schema is proper if no alias is
specified.

ZynqMP> i2c bus
Bus 0:	i2c at ff020000
   20: gpio at 20, offset len 1, flags 0
   21: gpio at 21, offset len 1, flags 0
   75: i2c-mux at 75, offset len 1, flags 0
Bus 1:	i2c at ff020000->i2c-mux at 75->i2c at 0
Bus 2:	i2c at ff020000->i2c-mux at 75->i2c at 1
Bus 3:	i2c at ff020000->i2c-mux at 75->i2c at 2
Bus 4:	i2c at ff030000  (active 4)
   74: i2c-mux at 74, offset len 1, flags 0
   75: i2c-mux at 75, offset len 1, flags 0
Bus 5:	i2c at ff030000->i2c-mux at 74->i2c at 0  (active 5)
   54: eeprom at 54, offset len 1, flags 0
Bus 6:	i2c at ff030000->i2c-mux at 74->i2c at 1
Bus 7:	i2c at ff030000->i2c-mux at 74->i2c at 2
Bus 8:	i2c at ff030000->i2c-mux at 74->i2c at 3
Bus 9:	i2c at ff030000->i2c-mux at 74->i2c at 4
Bus 10:	i2c at ff030000->i2c-mux at 75->i2c at 0
Bus 11:	i2c at ff030000->i2c-mux at 75->i2c at 1
Bus 12:	i2c at ff030000->i2c-mux at 75->i2c at 2
Bus 13:	i2c at ff030000->i2c-mux at 75->i2c at 3
Bus 14:	i2c at ff030000->i2c-mux at 75->i2c at 4
Bus 15:	i2c at ff030000->i2c-mux at 75->i2c at 5
Bus 16:	i2c at ff030000->i2c-mux at 75->i2c at 6
Bus 17:	i2c at ff030000->i2c-mux at 75->i2c at 7

Thanks,
Michal

Changes in v2:
- Update kernel-doc binding
- Return -1 in case of error. -1 means that the next free alias is 0.
- New patch
- New patch
- Use dev_read_alias_highest_id()
- Use uclass private data
- Use private uclass data
- Fix headers
- Change patch description to focus only on bus name

Michal Simek (7):
  dm: core: Add of_alias_get_highest_id()
  fdt: Introduce fdtdec_get_alias_highest_id()
  dm: core: Introduce dev_read_alias_highest_id()
  dm: core: Add tests for dev_read_alias_highest_id()
  i2c: dm: Record maximum id of devices before probing devices
  i2c: Fill req_seq in i2c_post_bind()
  i2c: mux: Generate longer i2c mux name

 drivers/core/of_access.c           | 18 ++++++++++++++
 drivers/core/read.c                |  8 ++++++
 drivers/i2c/i2c-uclass.c           | 50 +++++++++++++++++++++++++++++++++++---
 drivers/i2c/muxes/i2c-mux-uclass.c | 29 +++++++++++++++++++---
 include/dm/of_access.h             | 10 ++++++++
 include/dm/read.h                  | 16 ++++++++++++
 include/fdtdec.h                   | 13 ++++++++++
 lib/fdtdec.c                       | 33 +++++++++++++++++++++++++
 test/dm/test-fdt.c                 | 23 ++++++++++++++++++
 9 files changed, 194 insertions(+), 6 deletions(-)

-- 
1.9.1