[PATCH v2 0/9] gpio: mxc: bug fixes and probe cleanup

["Peng Fan (OSS)" <peng.fan@oss.nxp.com>]

This series cleans up the gpio-mxc driver in several incremental steps:
bug fixes, converting runtime state to static per-compatible data,
modernizing resource management with devres, and cleaning up
register access patterns.

Patches 1-2 are bug fixes:
  - Fix a race where the chained IRQ handler is installed before probe
    completes, allowing interrupts to fire on a half-initialized port.
  - Fix wakeup_pads bit operations that used wrong set_bit/clear_bit
    logic, folding in the assign_bit() simplification from V1.

Patches 3-4 replace runtime of_device_is_compatible() string matching
with a flags field in mxc_gpio_hwdata, keyed through the match table.
This moves all per-SoC differentiation into static data:
  - Patch 3: power_off flag and MXC_GPIO_HW_DATA_COMMON macro.
  - Patch 4: pad_wakeup and imx8qm flags with dedicated hwdata instances.

Patches 5-6 convert probe error handling to devres:
  - Patch 5: replace irq_domain_create_legacy() with
    devm_irq_domain_instantiate(), and the open-coded PM runtime
    sequence with devm_pm_runtime_set_active_enabled(), eliminating
    all goto labels.
  - Patch 6: switch bare returns to dev_err_probe() throughout probe.

Patch 7 introduces a local 'dev' variable, replaces
of_device_is_compatible() with device_is_compatible(), and swaps
linux/of.h for linux/property.h.

Patches 8-9 are cosmetic register access cleanups:
  - Patch 8: MXC_ICR_REG/MXC_ICR_MASK macros with field_prep/field_get.
  - Patch 9: BIT() macro for all single-bit shift operations.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
Changes in V2:
- Reworked compatible-string caching (V1 patch 3) from probe-time bools
  in mxc_gpio_port to static hwdata flags with per-compatible data
  instances.  Split into two patches: one introducing the flags scheme
  with MXC_GPIO_HW_DATA_COMMON macro for power_off (patch 3), one
  extending it to pad_wakeup and imx8qm (patch 4).  (Frank, bot review)
- Replaced devm_pm_runtime_get_noresume() + pm_runtime_set_active() +
  devm_pm_runtime_enable() with devm_pm_runtime_set_active_enabled().
  Keep plain pm_runtime_get_noresume() (non-devm) for the probe-scoped
  reference to avoid usage_count underflow on unbind.  (Frank, bot review)
- Replaced irq_domain_create_legacy() + devm_add_action_or_reset() with
  devm_irq_domain_instantiate().  Squashed with the PM runtime devres
  conversion (V1 patches 4+5) into a single patch (patch 5), since the
  goto labels cannot be removed until both resources are devres-managed.
- Split dev_err_probe() conversion into its own patch (patch 6) for
  bisectability — patch 5 uses bare returns with correct error values.
- Folded gpio_set_wake_irq() assign_bit simplification (V1 patch 9) into
  the wakeup_pads fix (patch 2) where it belongs.
- Used 0x3U (unsigned) in MXC_ICR_MASK() to avoid implementation-defined
  behavior when shifting by 30 bits.
- Replaced linux/of.h with linux/property.h to match the
  of_device_is_compatible() → device_is_compatible() API change (patch 7).
- Added return-value checks for devm_pm_runtime_set_active_enabled().
- Fixed stale error code returns after devm_irq_alloc_descs() and
  devm_irq_domain_instantiate() in the devres conversion patch.
- Link to v1: https://patch.msgid.link/20261003-gpio-mxc-cleanup-v1-0-dad728ce27f2@nxp.com

---
Peng Fan (9):
      gpio: mxc: fix race between chained IRQ handler install and probe completion
      gpio: mxc: fix wakeup_pads bit operations
      gpio: mxc: replace of_device_is_compatible() with hwdata flags
      gpio: mxc: convert pad wakeup compatible checks to hwdata flags
      gpio: mxc: convert probe error handling to devres
      gpio: mxc: switch probe error paths to dev_err_probe()
      gpio: mxc: use local dev variable
      gpio: mxc: introduce MXC_ICR macros and use field_prep/field_get
      gpio: mxc: use BIT() macro for single-bit operations

 drivers/gpio/gpio-mxc.c | 262 +++++++++++++++++++++++++++---------------------
 1 file changed, 147 insertions(+), 115 deletions(-)
---
base-commit: f0406245cb9855e6318335a8a223551354291a46
change-id: 20261003-gpio-mxc-cleanup-e49cc626c51e

Best regards,
--  
Peng Fan <peng.fan@nxp.com>