[0/2] Add GPIO level-sensitive interrupt support

Message

Alexandre TORGUE Feb. 10, 2020, 1:48 p.m. UTC

This series adds the possibility to handle gpio interrupts on level.

GPIO hardware block is directly linked to EXTI block but EXTI handles
external interrupts only on edge. To be able to handle GPIO interrupt on
level a "hack" is done in gpio irq chip: parent interrupt (exti irq chip)
is retriggered following interrupt type and gpio line value.

In exti irq chip, retrigger ops function is added.

Regards
Alex

Alexandre Torgue (2):
  irqchip/stm32: Add irq retrigger support
  pinctrl: stm32: Add level interrupt support to gpio irq chip

 drivers/irqchip/irq-stm32-exti.c      | 14 +++++++-
 drivers/pinctrl/stm32/pinctrl-stm32.c | 47 +++++++++++++++++++++++++--
 2 files changed, 58 insertions(+), 3 deletions(-)