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    Subject[PATCH v4 0/7] gpio: mockup: improve the user-space testing interface
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    From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

    Hi Marc,

    another try at the irq_sim stuff. This time I added a notifier chain to
    irq_sim and made gpio-mockup register a notifier block. This way interested
    users will get notified about a type config change.

    v1 -> v2:
    - instead of providing the irq_sim_get_type() helper, move the irq type
    logic into the simulator and provide a helper that allows users to specify
    the type of the fired interrupt

    v2 -> v3:
    - switch back to having irq_sim_type() and put the line state logic into the
    GPIO testing module

    v3- > v4:
    - drop irq_sim_get_type() and use a notifier chain instead so that any change
    in type configuration can be pushed out to interested users
    - change the locking mechanism in gpio-mockup to a spinlock as we can't take
    a mutex when a hardirq-safe spinlock in irq_desc is being held when the
    irq_set_type() callback is called
    - refuse to set any other type than falling or rising edge in irq_set_config

    Bartosz Golaszewski (7):
    irq/irq_sim: add a notifier chain
    gpio: mockup: add locking
    gpio: mockup: implement get_multiple()
    gpio: mockup: don't create the debugfs link named after the label
    gpio: mockup: change the type of 'offset' to unsigned int
    gpio: mockup: change the signature of unlocked get/set helpers
    gpio: mockup: rework debugfs interface

    drivers/gpio/gpio-mockup.c | 215 ++++++++++++++++++++++++++++++++-----
    include/linux/irq_sim.h | 22 +++-
    kernel/irq/irq_sim.c | 40 +++++++
    3 files changed, 246 insertions(+), 31 deletions(-)

    --
    2.20.1

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