[PATCH 0/2] gpio: pca953x: Add interrupt mask support for pca953x chips

[Levente Révész <levente.revesz@xxxxxxxxxx>]

Hello,

Some chips in the pca953x family have an interrupt mask register in
addition to the standard 4 registers:

    0: INPUT
    1: OUTPUT
    2: POLARITY
    3: CONFIGURATION
    4: INTERRUPT MASK

Chips with this register:

    - pca9505
    - pca9506
    - pca9698

The interrupt mask register defaults to all interrupts disabled, so
interrupts are unusable unless the driver sets this register.

Interrupt masking is already implemented for pcal chips. That
implementation could be extended to support this register as well.

This patch series adds support for the interrupt mask register in
mentioned pca chips.

Note 1:

    Interrupt support for the pca9698 is not enabled currently, so the
    interrupt mask support has not been turned on either. An additional
    patch in this series could enable support for it, although I have no
    hardware to test with.

Kind regards,
Levente

Levente Révész (2):
  gpio: pca953x: Generalize interrupt mask register handling
  gpio: pca953x: Add interrupt mask support for chips with the standard
    register set

 drivers/gpio/gpio-pca953x.c | 81 +++++++++++++++++++++++++------------
 1 file changed, 56 insertions(+), 25 deletions(-)

-- 
2.37.3