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author | Lars Poeschel <poeschel@lemonage.de> | 2014-01-16 11:44:15 +0100 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2014-01-17 15:30:14 +0100 |
commit | 4e47f91bf741e011a90ceb6241b8d78141709733 (patch) | |
tree | 1febf3cbbf59a1202dc5d944d392ce28b6b851fe /drivers/gpio/gpio-tb10x.c | |
parent | 785acec3eecf4c21bab9e24afb5d354b57a72e03 (diff) | |
download | linux-4e47f91bf741e011a90ceb6241b8d78141709733.tar.bz2 |
gpio: mcp23s08: Add irq functionality for i2c chips
This adds interrupt functionality for i2c chips to the driver.
They can act as a interrupt-controller and generate interrupts, if
the inputs change.
This is tested with a mcp23017 chip on an arm based platform.
v3:
- be a bit more clear that the irq functionality is also available
on spi versions of the chips, but the linux driver does not support
this yet
v2:
- some more word about irq-mirror property in binding doc
- use of_read_bool instead of of_find_property for
"interrupt-contrller" and "irq-mirror"
- cache the "interrupt-controller" for remove function
- do set the irq-mirror bit only if device is marked as
interrupt-controller
- do create the irq mapping and setup of irq_desc of all possible
interrupts in probe path instead of in gpio_to_irq
- mark gpios as in use as interrupts in irq in irq_startup and
unlock it in irq_shutdown
- rename virq to child_irq
- remove dev argument from mcp23s08_irq_setup function
- move gpiochip_add before mcp23s08_irq_setup in probe path
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-tb10x.c')
0 files changed, 0 insertions, 0 deletions