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authorLinus Torvalds <torvalds@linux-foundation.org>2019-10-17 08:08:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-10-17 08:08:20 -0700
commit7801158f83fc90cbe2d5cceac6ef58a4a6cf2d33 (patch)
tree0e33e6998dd6e13824d64b0a74869fe180d548fa /include/linux
parentbc88f85c6c09306bd21917e1ae28205e9cd775a7 (diff)
parent75e99bf5ed8fa74bc80d693d8e0a24eeaa38202b (diff)
Merge tag 'gpio-v5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO fixes from Linus Walleij: "The fixes pertain to a problem with initializing the Intel GPIO irqchips when adding gpiochips. Andy fixed it up elegantly by adding a hardware initialization callback to the struct gpio_irq_chip so let's use this. Tested and verified on the target hardware" * tag 'gpio-v5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio: lynxpoint: set default handler to be handle_bad_irq() gpio: merrifield: Move hardware initialization to callback gpio: lynxpoint: Move hardware initialization to callback gpio: intel-mid: Move hardware initialization to callback gpiolib: Initialize the hardware with a callback gpio: merrifield: Restore use of irq_base
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/gpio/driver.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index f8245d67f070..5dd9c982e2cb 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -202,6 +202,14 @@ struct gpio_irq_chip {
bool threaded;
/**
+ * @init_hw: optional routine to initialize hardware before
+ * an IRQ chip will be added. This is quite useful when
+ * a particular driver wants to clear IRQ related registers
+ * in order to avoid undesired events.
+ */
+ int (*init_hw)(struct gpio_chip *chip);
+
+ /**
* @init_valid_mask: optional routine to initialize @valid_mask, to be
* used if not all GPIO lines are valid interrupts. Sometimes some
* lines just cannot fire interrupts, and this routine, when defined,