linux-kernel - [PATCH v3 0/2] Add GPIO level-sensitive interrupt support

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Date:   Wed, 19 Feb 2020 15:32:27 +0100
From:   Alexandre Torgue <alexandre.torgue@...com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
        <marex@...x.de>, <alexandre.torgue@...com>
Subject: [PATCH v3 0/2] Add GPIO level-sensitive interrupt support

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.

Changes since v2:
 - Fix issues reported by Marc:
   - do not retrigger uselessly a second time in exti irq retrigger callback
   - minor comments in pinctrl patch

Changes since v1:
 - Fix issue reported by Marek: return statment in "stm32_gpio_set_type"
   function.

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 | 45 +++++++++++++++++++++++++--
 2 files changed, 56 insertions(+), 3 deletions(-)

-- 
2.17.1