diff options
| author | Linus Walleij | 2016-09-23 14:50:14 +0200 |
|---|---|---|
| committer | Linus Walleij | 2016-09-23 14:50:14 +0200 |
| commit | ccf1e9e1c0072088420aad42797986d6e74366b5 (patch) | |
| tree | 4576822ae245e96f0031c7448ac2b7376bd72e8d /Documentation | |
| parent | 31ebe86d6ef5f3280705e7ac9ab366f60f4e699c (diff) | |
| parent | 79b804cb6af4f128b2c53f0887c02537a7eb5824 (diff) | |
Merge branch 'gpio-irq-validmask' into devel
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/gpio/driver.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/gpio/driver.txt b/Documentation/gpio/driver.txt index 6cb35a78eff4..368d5a294d89 100644 --- a/Documentation/gpio/driver.txt +++ b/Documentation/gpio/driver.txt @@ -262,6 +262,12 @@ symbol: to the container using container_of(). (See Documentation/driver-model/design-patterns.txt) + If there is a need to exclude certain GPIOs from the IRQ domain, one can + set .irq_need_valid_mask of the gpiochip before gpiochip_add_data() is + called. This allocates .irq_valid_mask with as many bits set as there are + GPIOs in the chip. Drivers can exclude GPIOs by clearing bits from this + mask. The mask must be filled in before gpiochip_irqchip_add() is called. + * gpiochip_set_chained_irqchip(): sets up a chained irq handler for a gpio_chip from a parent IRQ and passes the struct gpio_chip* as handler data. (Notice handler data, since the irqchip data is likely used by the |