gpio: 104-dio-48e: Migrate to the regmap-irq API

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The regmap API supports IO port accessors so we can take advantage of
regmap abstractions rather than handling access to the device registers
directly in the driver.

For the 104-dio-48e we have the following IRQ registers (0xB and 0xF):

    Base Address +B (Write): Enable Interrupt
    Base Address +B (Read): Disable Interrupt
    Base Address +F (Read/Write): Clear Interrupt

Any write to 0xB will enable interrupts, while any read will disable
interrupts. Interrupts are cleared by a write to 0xF. There's no IRQ
status register, so software has to assume that if an interrupt is
raised then it was for the 104-DIO-48E device.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

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This commit is contained in:

William Breathitt Gray 2022-12-27 09:09:40 -05:00 • committed by Bartosz Golaszewski

parent 8978277c22

commit 2f7e845f51

2 changed files with 135 additions and 142 deletions

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drivers/gpio/Kconfig

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281

drivers/gpio/gpio-104-dio-48e.c

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