From: Abdel Alkuor <abdelalkuor@xxxxxxxxxx>
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.
v5:
- PATCH 1: Add tps25750 bindings to tps6598x
- PATCH 2: Remove tps25750 driver and incorperate 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 (15):
dt-bindings: usb: tps6598x: Add tps25750
USB: typec: Add cmd timeout and response delay
USB: typec: Add patch mode to tps6598x
USB: typec: Load TPS25750 patch bundle
USB: typec: Check for EEPROM present
USB: typec: Clear dead battery flag
USB: typec: Apply patch again after power resume
USB: typec: Add interrupt support for TPS25750
USB: typec: Refactor tps6598x port registration
USB: typec: Add port registration for tps25750
USB: typec: Enable sleep mode for tps25750
USB: typec: Add trace for tps25750 irq
USB: typec: Add power status trace for tps25750
USB: typec: Add status trace for tps25750
USB: typec: Do not check VID for tps25750
.../devicetree/bindings/usb/ti,tps6598x.yaml | 70 +++
drivers/usb/typec/tipd/core.c | 570 +++++++++++++++---
drivers/usb/typec/tipd/tps6598x.h | 36 ++
drivers/usb/typec/tipd/trace.h | 84 +++
4 files changed, 683 insertions(+), 77 deletions(-)
--
2.34.1
