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GPIO fixes for the v5.4 series

Browse source 
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.
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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
This commit is contained in:
Linus Torvalds 2019-10-17 08:08:20 -07:00
commit 7801158f83
5 changed files with 47 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

8
include/linux/gpio/driver.h
View file

@ -201,6 +201,14 @@ 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