[PATCH v9 00/14] Add TPS25750 USB type-C PD controller support

Abdel Alkuor
2023-10-01T08:15:21Z

TPS25750 USB type-C PD controller has the same register offsets as
tps6598x. The following is a summary of incorporating TPS25750 into
TPS6598x driver:

- Only Check VID register (0x00) for TPS6598x and cd321x, as TPS25750 doesn't
have VID register.

- TypeC port registration will be registered differently for each PD
controller. TPS6598x uses system configuration register (0x28) to get
pr/dr capabilities. On the other hand, TPS25750 will use data role property
and PD status register (0x40) to get pr/dr capabilities as TPS25750 doesn't
have register 0x28 supported.

- TPS25750 requires writing a binary configuration to switch PD
controller from PTCH mode to APP mode which needs the following changes:
- Add PTCH mode to the modes list.
- Add an argument to tps6598x_check_mode to return the current mode.
- Currently, tps6598x_exec_cmd has cmd timeout hardcoded to 1 second,
and doesn't wait before checking DATA_OUT response. In TPS25750, patch 4CCs
take longer than 1 second to execute and some requires a delay before
checking DATA_OUT. To accommodate that, cmd_timeout and response_delay will
be added as arguments to tps6598x_exec_cmd.
- Implement applying patch sequence for TPS25750.

- In pm suspend callback, patch mode needs to be checked and the binary
configuration should be applied if needed.

- For interrupt, TPS25750 has only one event register (0x14) and one mask
register (0x16) of 11 bytes each, where TPS6598x has two event
and two mask registers of 8 bytes each. Both TPS25750 and TPS65986x
shares the same bit field offsets for events/masks/clear but many of
there fields are reserved in TPS25750, the following needs to be done in
tps6598x_interrupt:
- Read EVENT1 register as a block of 11 bytes when tps25750 is present
- Write CLEAR1 register as a block of 11 bytes when tps25750 is present
- Add trace_tps25750_irq
- During testing, I noticed that when a cable is plugged into the PD
controller and before PD controller switches to APP mode, there is a
lag between dr/pr updates and PlugInsertOrRemoval Event, so a check
for dr/pr change needs to be added along TPS_REG_INT_PLUG_EVENT check

- Add TPS25750 traces for status and power status registers. Trace for
data register won't be added as it doesn't exist in the device.

- Configure sleep mode for TPS25750.

v9:
- PATCH 1:
- Add Reviewed-by
- PATCH 2..7:
- No changes
- PATCH 8:
- Move of_device_id to its original place
- Move device data structs to the top of of_device_id
- Use device_get_match_data to get device data
- PATCH 9:
- No changes
- PATCH 10:
- Move device data structs to the top of of_device_id
- PATCH 11,12:
- No changes
- PATCH 13,14:
- Move device data structs to the top of of_device_id
v8:
- PATCH 1:
- Define reg-names at top-level
- PATCH 2:
- Add Reviewed-by
- PATCH 3:
- Revert mode check return
- PATCH 4:
- Return mode when mode is checked
- Use device_is_compatible instead of of_device_is_compatible
- PATCH 5,6:
- No changes
- PATCH 7:
- Use device_is_compatible instead of of_device_is_compatible
- PATCH 8,9:
- No changes
- PATCH 10:
- Change tps->cb to tps->data
- PATCH 11,12:
- No changes
- PATCH 13,14:
- Change tps->cb to tps->data

v7:
- PATCH 1:
- Define reg at top-level
- Remove description from reg-names
- PATCH 2..7: Add tps6598x to the subject
- PATCH 8:
- Add tps6598x to the subject
- Create tps25750 interrupt handler
- PATCH 9..11: Add tps6598x to the subject
- PATCH 12:
- Add driver name to commit subject
- Call trace_tps25750_irq directly from tps25750 interrupt
handler
- PATCH 13-14: Add tps6598x to the subject

v6:
- PATCH 1: Use reg property for patch address
- PATCH 2: Use tps6598x_exec_cmd as a wrapper
- PATCH 3: Return current mode and check it directly
- PATCH 4:
- Don't check VID for tps25750 as the VID register doesn't exist
- Remove is_tps25750 flag from tps6598x struct
- Get patch address from reg property
- PATCH 5: Update eeprom macro to use TPS instead
- PATCH 6: No changes
- PATCH 7: Check tps25750 using is_compatiable device node
- PATCH 8: Create tipd callbacks factory
- PATCH 9: No changes
- PATCH 10: Add port registration to tipd data factory
- PATCH 11: Use tps25750_init instead of tps25750_apply_patch in resume
as it initializes sleep mode
- PATCH 12: Add trace irq to tipd callbacks factory
- PATCH 13: Add trace power status to tipd data factory
- PATCH 14: Add trace status to tipd data factory
v5:
- PATCH 1: Add tps25750 bindings to tps6598x
- PATCH 2: Remove tps25750 driver and incorperate tps25750
into tps6598x driver
- PATCH [3..15]: Incorporating tps25750 into tps6598x driver
v4:
- PATCH 1: No change
- PATCH 2: Fix comments style and drop of_match_ptr
v3:
- PATCH 1: Fix node name
- PATCH 2: Upload tps25750 driver patch
v2:
- PATCH 1: General properties clean up

Abdel Alkuor (14):
dt-bindings: usb: tps6598x: Add tps25750
USB: typec: tsp6598x: Add cmd timeout and response delay
USB: typec: tps6598x: Add patch mode to tps6598x
USB: typec: tps6598x: Load TPS25750 patch bundle
USB: typec: tps6598x: Check for EEPROM present
USB: typec: tps6598x: Clear dead battery flag
USB: typec: tps6598x: Apply patch again after power resume
USB: typec: tps6598x: Add interrupt support for TPS25750
USB: typec: tps6598x: Refactor tps6598x port registration
USB: typec: tps6598x: Add port registration for tps25750
USB: typec: tps6598x: Enable sleep mode for tps25750
USB: typec: tps6598x: Add trace for tps25750 irq
USB: typec: tps6598x: Add power status trace for tps25750
USB: typec: tps6598x: Add status trace for tps25750

.../devicetree/bindings/usb/ti,tps6598x.yaml | 81 ++-
drivers/usb/typec/tipd/core.c | 624 ++++++++++++++++--
drivers/usb/typec/tipd/tps6598x.h | 36 +
drivers/usb/typec/tipd/trace.h | 92 +++
4 files changed, 762 insertions(+), 71 deletions(-)

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2.34.1