[PATCH v5 00/17] i3c: renesas: Suspend to RAM with power loss and runtime PM

[Claudiu Beznea]

From: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>

Hi,

This series adjusts the suspend to RAM code to handle cases where power
to the connected devices is lost during suspend to RAM. The fixes
included in this series are required for that support.

Along with suspend to RAM support, runtime PM support is also added.
Cleanup patches were included to prepare for clean runtime PM support.

Thank you,
Claudiu

Changes in v5:
- in patch 1 introduced renesas_i3c_irqs_mask_and_clear_locked()
  similar to what was present in v4 in patch
  "i3c: renesas: Add runtime PM support" but without locking; use the
  same function to mask all the interrupts and cleanup the status
  flag in case interrupts are triggered after the transfer completion
  timed out
- introduce patch "i3c: renesas: Fix out-of-bounds access for newdevs mask"
  to avoid failures when there are no I3C devices connected on the
  bus at probe
- patch "i3c: renesas: Perform Dynamic Address Assignment on resume"
  was restored to the v1 variant; kept it simple to fix the
  suspend/resume for the moment

Changes in v4:
- dropped patch "i3c: renesas: Do not attach devices if xfer failed"
- fixed the swap in renesas_i3c_group_devs_in_slots() for i3c->addr[]
  renesas_i3c_irqs_mask_and_clear();
- in patch 16/16 renamed renesas_i3c_abort_xfer() from v3 to
	
Changes in v3:
- re-based on top of series [1] to be able to use
  i3c_master_reattach_i3c_dev_locked()
- used i3c_master_reattach_i3c_dev_locked() on patch
  "i3c: renesas: Perform Dynamic Address Assignment on resume" along with
  grouping the I2C and I3C devices in the driver slot
- collected tags

Changes in v2:
- dropped patch "i3c: renesas: Use the divider 128"
- adjusted the patches title and description where requested in the
  review process
- adjusted the DAA procedure after resume to still properly re-configure
  the controller in case the bus was full before a suspend
- added patch "i3c: renesas: Do not attach devices if xfer failed"
- collected tags

Claudiu Beznea (17):
  i3c: renesas: Check that the transfer is valid before accessing it
  i3c: renesas: Restore STDBR and EXTBR registers on resume
  i3c: renesas: Follow the reset deassert order used in probe
  i3c: renesas: Reconfigure the DATBAS register on re-attach
  i3c: renesas: Reset the controller on resume
  i3c: renesas: Perform Dynamic Address Assignment on resume
  i3c: renesas: Clean DATBAS register on detach
  i3c: renesas: Fix out-of-bounds access for newdevs mask
  i3c: renesas: Use reset_control_bulk_{assert, deassert}()
  i3c: renesas: Return immediately if there is no transfer
  i3c: renesas: Follow a unified pattern for transfer and command
    initialization
  i3c: renesas: Drop the explicit memset() call
  i3c: renesas: Update HW registers after SW computations are done
  i3c: renesas: Organize structures to avoid unnecessary padding
  i3c: renesas: Use the "dev_name:irq_name" format for the interrupt
    name
  i3c: renesas: Drop unnecessary tab
  i3c: renesas: Add runtime PM support

 drivers/i3c/master/renesas-i3c.c | 375 +++++++++++++++++++++----------
 1 file changed, 261 insertions(+), 114 deletions(-)

-- 
2.43.0