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authorLinus Walleij <linus.walleij@linaro.org>2016-09-23 14:51:18 +0200
committerLinus Walleij <linus.walleij@linaro.org>2016-09-23 14:51:18 +0200
commit22a5db98a30ea734c29056b0d59cb4fe2a383bc2 (patch)
treed1d5b3ee914e95f00b917ebf48b59fe8331a5734 /Documentation
parent9132ce450bd141cd8c5776b41e90f146cae4bc3b (diff)
parent79b804cb6af4f128b2c53f0887c02537a7eb5824 (diff)
Merge branch 'gpio-irq-validmask' of /home/linus/linux-pinctrl into devel
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/gpio/driver.txt6
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