pinctrl: stm32: Add level interrupt support to gpio irq chip

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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.

Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Marek Vasut <marex@denx.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20200219143229.18084-3-alexandre.torgue@st.com

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Alexandre Torgue 2020-02-19 15:32:29 +01:00 • committed by Marc Zyngier

parent 25591d4c64

commit 47beed513a

1 changed files with 43 additions and 2 deletions

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drivers/pinctrl/stm32/pinctrl-stm32.c

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