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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-08 18:00:35 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-08 18:00:35 -0700 |
commit | 06b49ea43c0cdd22625883e555e45e66ef29e201 (patch) | |
tree | 9c72c88541e2bec5a95354504708a066fd8e50aa /Documentation/devicetree | |
parent | 664fb23070ae66a023250a83870a5bae7cd0efeb (diff) | |
parent | bdc6e95e1273b5cef01590273c1a240c53ceeea0 (diff) | |
download | op-kernel-dev-06b49ea43c0cdd22625883e555e45e66ef29e201.zip op-kernel-dev-06b49ea43c0cdd22625883e555e45e66ef29e201.tar.gz |
Merge tag 'gpio-v3.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO update from Linus Walleij:
"This is the bulk of GPIO changes for the v3.17 development cycle, and
this time we got a lot of action going on and it will continue:
- The core GPIO library implementation has been split up in three
different files:
- gpiolib.c for the latest and greatest and shiny GPIO library code
using GPIO descriptors only
- gpiolib-legacy.c for the old integer number space API that we are
phasing out gradually
- gpiolib-sysfs.c for the sysfs interface that we are not entirely
happy with, but has to live on for ABI compatibility
- Add a flags argument to *gpiod_get* functions, with some
backward-compatibility macros to ease transitions. We should have
had the flags there from the beginning it seems, now we need to
clean up the mess. There is a plan on how to move forward here
devised by Alexandre Courbot and Mark Brown
- Split off a special <linux/gpio/machine.h> header for the board
gpio table registration, as per example from the regulator
subsystem
- Start to kill off the return value from gpiochip_remove() by
removing the __must_check attribute and removing all checks inside
the drivers/gpio directory. The rationale is: well what were we
supposed to do if there is an error code? Not much: print an error
message. And gpiolib already does that. So make this function
return void eventually
- Some cleanups of hairy gpiolib code, make some functions not to be
used outside the library private and make sure they are not
exported, remove gpiod_lock/unlock_as_irq() as the existing
function is for driver-internal use and fine as it is, delete
gpio_ensure_requested() as it is not meaningful anymore
- Support the GPIOF_ACTIVE_LOW flag from gpio_request_one() function
calls, which is logical since this is already supported when
referencing GPIOs from e.g. device trees
- Switch STMPE, intel-mid, lynxpoint and ACPI (!) to use the gpiolib
irqchip helpers cutting down on GPIO irqchip boilerplate a bit more
- New driver for the Zynq GPIO block
- The usual incremental improvements around a bunch of drivers
- Janitorial syntactic and semantic cleanups by Jingoo Han, and
Rickard Strandqvist especially"
* tag 'gpio-v3.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (37 commits)
MAINTAINERS: update GPIO include files
gpio: add missing includes in machine.h
gpio: add flags argument to gpiod_get*() functions
MAINTAINERS: Update Samsung pin control entry
gpio / ACPI: Move event handling registration to gpiolib irqchip helpers
gpio: lynxpoint: Convert to use gpiolib irqchip
gpio: split gpiod board registration into machine header
gpio: remove gpio_ensure_requested()
gpio: remove useless check in gpiolib_sysfs_init()
gpiolib: Export gpiochip_request_own_desc and gpiochip_free_own_desc
gpio: move gpio_ensure_requested() into legacy C file
gpio: remove gpiod_lock/unlock_as_irq()
gpio: make gpiochip_get_desc() gpiolib-private
gpio: simplify gpiochip_export()
gpio: remove export of private of_get_named_gpio_flags()
gpio: Add support for GPIOF_ACTIVE_LOW to gpio_request_one functions
gpio: zynq: Clear pending interrupt when enabling a IRQ
gpio: drop retval check enforcing from gpiochip_remove()
gpio: remove all usage of gpio_remove retval in driver/gpio
devicetree: Add Zynq GPIO devicetree bindings documentation
...
Diffstat (limited to 'Documentation/devicetree')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-zynq.txt | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-zynq.txt b/Documentation/devicetree/bindings/gpio/gpio-zynq.txt new file mode 100644 index 0000000..986371a --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-zynq.txt @@ -0,0 +1,26 @@ +Xilinx Zynq GPIO controller Device Tree Bindings +------------------------------------------- + +Required properties: +- #gpio-cells : Should be two + - First cell is the GPIO line number + - Second cell is used to specify optional + parameters (unused) +- compatible : Should be "xlnx,zynq-gpio-1.0" +- clocks : Clock specifier (see clock bindings for details) +- gpio-controller : Marks the device node as a GPIO controller. +- interrupts : Interrupt specifier (see interrupt bindings for + details) +- interrupt-parent : Must be core interrupt controller +- reg : Address and length of the register set for the device + +Example: + gpio@e000a000 { + #gpio-cells = <2>; + compatible = "xlnx,zynq-gpio-1.0"; + clocks = <&clkc 42>; + gpio-controller; + interrupt-parent = <&intc>; + interrupts = <0 20 4>; + reg = <0xe000a000 0x1000>; + }; |