linux-kernel - [PATCH 0/3] gpio: pcie-idio-24: Fix IRQ handling

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Message-Id: <20201104152455.40627-1-quarium@gmail.com>
Date:   Wed,  4 Nov 2020 16:24:52 +0100
From:   Arnaud de Turckheim <quarium@...il.com>
To:     linus.walleij@...aro.org
Cc:     bgolaszewski@...libre.com, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, vilhelm.gray@...il.com,
        Arnaud de Turckheim <quarium@...il.com>
Subject: [PATCH 0/3] gpio: pcie-idio-24: Fix IRQ handling

This patch set fixes the irq_mask/irq_unmask functions and enables the
PLX PEX8311 local interrupts.

With the current version of the driver, gpiomon (from libgpiod) or a
poll(2) on the sysfs value are not working. According to
/proc/interrupts, there is no interruption triggered.
The main issue is that the local interrupts are not forwarded by the
PEX8311 to the PCI.

There is also two bugs:
    - The IRQ mask is not correctly updated when unmasking an
      interruption.
    - The COS Enable Register value is not correctly updated when
      masking/unmasking an interruption.

It seems this problems exist since the initial commit.

Arnaud de Turckheim (3):
  gpio: pcie-idio-24: Fix irq mask when masking
  gpio: pcie-idio-24: Fix IRQ Enable Register value
  gpio: pcie-idio-24: Enable PEX8311 interrupts

 drivers/gpio/gpio-pcie-idio-24.c | 62 ++++++++++++++++++++++++++++----
 1 file changed, 56 insertions(+), 6 deletions(-)

-- 
2.25.1