RE: [PATCH v7 0/9] Add Renesas RZ/G3E GPT support

[Biju Das]

Hi Uwe,

Please ignore this series for review. I found some issues.
Will send V8 soon.

Cheers,
Biju

> -----Original Message-----
> From: Biju <biju.das.au@xxxxxxxxx>
> Sent: 24 August 2026 13:55
> Subject: [PATCH v7 0/9] Add Renesas RZ/G3E GPT support
> 
> From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> 
> This series extends the RZ/G2L GPT PWM driver with RZ/G3E SoC support.
> 
> The RZ/G3E GPT has a number of hardware differences compared to RZ/G2L:
> it exposes 16 channels (across two GPT instances of 8 channels each), uses a 4-bit GTCR prescaler field
> (versus 3-bit on RZ/G2L), and has a discontinuous prescale sequence with powers-of-2 scaling rather than
> the continuous powers-of-4 sequence on RZ/G2L. It also has additional clocks and resets (bus clock and
> rst_s).
> 
> v6->v7:
>  * Reordered the patched moving POEG support to last.
>  * Replaced USEC_PER_SEC->NSEC_PER_MSEC for period/duty cycle
>    conversion.
>  * Avoided recalculation of prescale, if is_small_second_period == true.
>  * Moved `wfhw->gtccr = 0` into the if block in rzg2l_gpt_config().
>  * Added rzg2l_gpt_poeg_link_channels() and used __free for deallocating
>    device node pointer.
>  * Replaced dev_err()->dev_err_probe() in rzg2l_gpt_poeg_link_channels().
>  * Replaced local variable cells with num_poeg_pairs in
>    rzg2l_gpt_poeg_init().
> v5->v6:
>  * Added patch for fixing period_ticks overflow.
>  * Added patch to add missing newlines to dev_err_probe() messages.
>  * Dropped extra space in poegs variable assignment in
>    rzg2l_gpt_poeg_init().
>  * Updated the comment sections of rzg2l_gpt_poeg_init() with POEG and GPT
>    in upper-case and replaced configure->configures.
>  * Format specifiers in dev_err() changed from %d to %u in
>    rzg2l_gpt_poeg_init().
>  * Dropped local variables pv and dc from rzg2l_gpt_round_waveform_tohw().
>  * Dropped blank line in rzg2l_gpt_round_waveform_tohw().
>  * Moved assignment of rzg2l_gpt->period_ticks[ch] to *_write_waveform().
>  * Restored clamping of duty_ticks with period_ticks in
>    rzg2l_gpt_round_waveform_tohw().
>  * Simplified rzg2l_gpt_write_waveform() using else if statement.
>  * Dropped local variable gptr in rzg2l_gpt_write_waveform().
>  * Moved mutex after early return in rzg2l_gpt_round_waveform_tohw().
>  * Dropped extra parameter rzg2l_gpt from rzg2l_gpt_calculate_prescale()
>    in rzg2l_gpt_round_waveform_tohw().
>  * Updated comment in rzg2l_gpt_calculate_period_or_duty().
>  * Updated rzg3e_gpt_calculate_prescale().
> v4->v5:
>  * Merged GPT linking POEG patch series here.
>  * Dropped suspend/resume patch; will be added later.
>  * Updated commit description for patches #2, #4, #5, and #6.
>  * Replaced return type of rzg2l_gpt_poeg_init() from void to int and
>    probe() check this return value.
>  * Added more error checks in rzg2l_gpt_poeg_init().
>  * Added a patch to drop the unused rzg2l_gpt_chip parameter from
>    rzg2l_gpt_calculate_prescale().
>  * Updated rzg2l_gpt_round_waveform_tohw() to initialize gtccr when the
>    period of the second channel is smaller.
>  * Replaced period_ticks with RZG2L_MAX_TICKS for the duty_ticks maximum
>    value check in rzg2l_gpt_round_waveform_tohw().
> v3->v4:
>  * Added wave form callback conversion back to this patch series.
>  * Updated rzg2l_gpt_is_ch_enabled() fit into 80-character limit for
>    consistency with other functions.
>  * Dropped field_{get,prep} as mainline now support it.
>  * Updated commit description for patch#3
>  * Retained RZG2L_GTCR_TPCS bit definitons
>  * Replaced gtcr_tpcs_mask->gtcr_tpcs
>  * Updated commit header and description for patch#4
>  * Renamed prescale_pow_of_two_mult_factor->prescale_mult
>  * Added RZG3E_GTCR_TPCS bit definition for RZ/G3E and added to
>    rzg3e_data.
>  * Added error checks on suspend() and device set to operational state
>    on failure().
>  * Added Rb tag from Geert for SoC dtsi.
>  * Added SW_GPIO9_CAN1_STB check to gpt0 node.
> v2->v3:
>  * Added Rb tag from Rob for bindings patch
>  * Dropped wave form callback conversion from this patch series as
>    it is covered in another series[1]
>  * Added suspend/resume support.
> v1->v2:
>  * Created separate document for RZ/G3E GPT.
>  * Updated commit header and description for binding patch.
>  * Added waveform callback conversion to this series.
>  * Collected tag.
>  * Added link to hardware manual
>  * Updated limitation section in driver patch.
> 
> Biju Das (9):
>   pwm: rzg2l-gpt: Fix macro used for period/duty cycle conversion
>   pwm: rzg2l-gpt: Convert to waveform callbacks
>   pwm: rzg2l-gpt: Add info variable to struct rzg2l_gpt_chip
>   pwm: rzg2l-gpt: Add prescale_mult variable to struct rzg2l_gpt_info
>   pwm: rzg2l-gpt: Add calculate_prescale() callback to struct
>     rzg2l_gpt_info
>   dt-bindings: pwm: Document RZ/G3E GPT support
>   pwm: rzg2l-gpt: Add RZ/G3E support
>   dt-bindings: pwm: rzg2l-gpt: Document renesas,poegs property
>   pwm: rzg2l-gpt: Add support for gpt linking with poeg
> 
>  .../bindings/pwm/renesas,rzg2l-gpt.yaml       |  23 ++
>  .../bindings/pwm/renesas,rzg3e-gpt.yaml       | 323 +++++++++++++++
>  drivers/pwm/pwm-rzg2l-gpt.c                   | 376 ++++++++++++++----
>  3 files changed, 634 insertions(+), 88 deletions(-)  create mode 100644
> Documentation/devicetree/bindings/pwm/renesas,rzg3e-gpt.yaml
> 
> 
> base-commit: 17b4db6750cedbf4b22fa3895631465a5688cff0
> --
> 2.43.0