[RESEND v12 0/3] mmc: mediatek: add support for SDIO async IRQ

[Axe Yang]

Changes in v12:
- assign NULL to pins_eint directly instead of using kfree()

Changes in v11:
- remove '_irq' suffix in interrupts-names property
- fix yaml example build error
- refactor msdc_enable_sdio_irq(), free pins_eint if async irq is not supported

Changes in v10:
- add sample node for SDIO host which support wakeup interrupt in yaml
- skip MMC_PM_WAKE_SDIO_IRQ check before enable SDIO async interrupt
- add MMC_PM_KEEP_POWER check before SDIO eint pinstate parsing
- use dev_pm_set_dedicated_wake_irq_reverse() to correct irq control sequence
- set dedicated irq in msdc_enable_sdio_irq() rather than msdc_drv_probe()
- remove unnecessary wake irq control, rpm/dpm system shall manage that
- move wake irq/msdc irq control back to system suspend phase, use rpm_suspend
  and rpm_resume to ensure irq control sequence:
     disable msdc irq -> enable wake irq -> disable wake irq -> enable msdc irq
- simplify variables, check pins_eint to know whether wakeup settings are managed

Changes in v9:
- remove pinctrl "state_dat1"

Changes in v8:
- remove maxItems property under pinctrl-names property

Changes in v7:
- add device_init_wakeup() to register SDIO host as wakeup source

Changes in v6:
- abandon cap-sdio-async-irq flag, use wakeup-source flag instead
- extend interrupts and pinctrls in mediatek mmc host controller DT documents
- add mmc_card_enable_async_irq() to access enable_async_irq flag
- simplify wakeup irq implementation with dedicate wake up irq related interface

Changes in v5:
- resort variables to reversed xmas tree order
- restore old copyright year range and add current year back

Changes in v4:
- add MMC_CAP2_SDIO_ASYNC_IRQ judge before lookup eint pinctrl
- replace spin_lock_irqsave() variant with spin_lock() in eint irq handler

Changes in v3:
- correct abbreviations with capital letters in commit message
- replace copyright year with 2022 in mtk-sd.c
- remove unnessary pointer casting
- adjust variable order to reversed xmas tree
- remove a redundant blank line
- refine if statement, following standard pattern

Changes in v2:
- change flag name from 'cap-sdio-async-int' to 'cap-sdio-async-irq'
- change corresponding macro names from xxx_INT to xxx_IRQ
- resort new member in msdc_host structure
- refine function msdc_request_dat1_eint_irq()
- rename msdc_{suspend,resume} function names, add suffix '_noirq'
- add MMC_CAP2_NO_SDIO judgement before parse eint related pin setting

Axe Yang (3):
  dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties
  mmc: core: Add support for SDIO wakeup interrupt
  mmc: mediatek: add support for SDIO eint wakup IRQ

 .../devicetree/bindings/mmc/mtk-sd.yaml       | 50 +++++++++++-
 drivers/mmc/core/sdio.c                       | 14 ++++
 drivers/mmc/host/mtk-sd.c                     | 80 +++++++++++++++++--
 include/linux/mmc/card.h                      |  8 +-
 include/linux/mmc/sdio.h                      |  5 ++
 5 files changed, 149 insertions(+), 8 deletions(-)

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2.25.1