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This is the bulk of GPIO changes for the v5.6 kernel cycle

Browse source 
Core changes:
 
 - Document the usecases for the kernelspace vs userspace
   handling of GPIOs.
 
 - Handle MSI (message signalled interrupts) properly in the
   core hierarchical irqdomain code.
 
 - Fix a rare race condition while initializing the descriptor
   array.
 
 New drivers:
 
 - Xylon LogiCVC GPIO driver.
 
 - WDC934x GPIO controller driver.
 
 Driver improvements:
 
 - Implemented suspend/resume in the Tegra driver.
 
 - MPC8xx edge detection fixup.
 
 - Properly convert ThunderX to use hierarchical irqdomain
   with GPIOLIB_IRQCHIP on top of the revert of the previous
   buggy switchover. This time it works (hopefully).
 
 Misc:
 
 - Drop a FMC remnant file <linux/ipmi-fru.h>
 
 - A slew of fixes.
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Merge tag 'gpio-v5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v5.6 kernel cycle.

  This is a pretty calm cycle so far, nothing special going on really.
  Some more changes will come in from the irqchip and pin control trees.

  I also deleted an orphan include file for FMC that was dangling since
  subsystem was removed.

  Core changes:

   - Document the usecases for the kernelspace vs userspace handling of
     GPIOs.

   - Handle MSI (message signalled interrupts) properly in the core
     hierarchical irqdomain code.

   - Fix a rare race condition while initializing the descriptor array.

  New drivers:

   - Xylon LogiCVC GPIO driver.

   - WDC934x GPIO controller driver.

  Driver improvements:

   - Implemented suspend/resume in the Tegra driver.

   - MPC8xx edge detection fixup.

   - Properly convert ThunderX to use hierarchical irqdomain with
     GPIOLIB_IRQCHIP on top of the revert of the previous buggy
     switchover. This time it works (hopefully).

  Misc:

   - Drop a FMC remnant file <linux/ipmi-fru.h>

   - A slew of fixes"

* tag 'gpio-v5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (48 commits)
  MAINTAINERS: Replace Tien Hock Loh as Altera PIO maintainer
  gpiolib: hold gpio devices lock until ->descs array is initialised
  gpio: aspeed-sgpio: fixed typos
  gpio: mvebu: clear irq in edge cause register before unmask edge irq
  gpiolib: Lower verbosity when allocating hierarchy irq
  gpiolib: Remove duplicated function gpio_do_set_config()
  gpio: Fix the no return statement warning
  gpio: wcd934x: Add support to wcd934x gpio controller
  gpiolib: remove set but not used variable 'config'
  gpio: vx855: fixed a typo
  gpio: mockup: sort headers alphabetically
  gpio: mockup: update the license tag
  gpio: Remove the unused flags
  gpiolib: Set lockdep class for hierarchical irq domains
  gpio: thunderx: Switch to GPIOLIB_IRQCHIP
  gpiolib: Add the support for the msi parent domain
  gpiolib: Add support for the irqdomain which doesn't use irq_fwspec as arg
  gpio: Add use guidance documentation
  dt-bindings: gpio: wcd934x: Add bindings for gpio
  gpio: altera: change to platform_get_irq_optional to avoid false-positive error
  ...
This commit is contained in:
Linus Torvalds 2020-01-29 09:43:39 -08:00
commit fa889d8555
38 changed files with 814 additions and 413 deletions
Download patch file Download diff file Expand all files Collapse all files

26
include/linux/gpio/driver.h
View file

@ -94,16 +94,15 @@ struct gpio_irq_chip {
unsigned int *parent_type);
/**
* @populate_parent_fwspec:
* @populate_parent_alloc_arg :
*
* This optional callback populates the &struct irq_fwspec for the
* parent's IRQ domain. If this is not specified, then
* This optional callback allocates and populates the specific struct
* for the parent's IRQ domain. If this is not specified, then
* &gpiochip_populate_parent_fwspec_twocell will be used. A four-cell
* variant named &gpiochip_populate_parent_fwspec_fourcell is also
* available.
*/
void (*populate_parent_fwspec)(struct gpio_chip *chip,
struct irq_fwspec *fwspec,
void *(*populate_parent_alloc_arg)(struct gpio_chip *chip,
unsigned int parent_hwirq,
unsigned int parent_type);
@ -537,29 +536,27 @@ struct bgpio_pdata {
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
void gpiochip_populate_parent_fwspec_twocell(struct gpio_chip *chip,
struct irq_fwspec *fwspec,
void *gpiochip_populate_parent_fwspec_twocell(struct gpio_chip *chip,
unsigned int parent_hwirq,
unsigned int parent_type);
void gpiochip_populate_parent_fwspec_fourcell(struct gpio_chip *chip,
struct irq_fwspec *fwspec,
void *gpiochip_populate_parent_fwspec_fourcell(struct gpio_chip *chip,
unsigned int parent_hwirq,
unsigned int parent_type);
#else
static inline void gpiochip_populate_parent_fwspec_twocell(struct gpio_chip *chip,
struct irq_fwspec *fwspec,
static inline void *gpiochip_populate_parent_fwspec_twocell(struct gpio_chip *chip,
unsigned int parent_hwirq,
unsigned int parent_type)
{
return NULL;
}
static inline void gpiochip_populate_parent_fwspec_fourcell(struct gpio_chip *chip,
struct irq_fwspec *fwspec,
static inline void *gpiochip_populate_parent_fwspec_fourcell(struct gpio_chip *chip,
unsigned int parent_hwirq,
unsigned int parent_type)
{
return NULL;
}
#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
@ -715,7 +712,8 @@ gpiochip_remove_pin_ranges(struct gpio_chip *chip)
#endif /* CONFIG_PINCTRL */
struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip, u16 hwnum,
struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip,
unsigned int hwnum,
const char *label,
enum gpio_lookup_flags lflags,
enum gpiod_flags dflags);