diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 20:00:21 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 20:00:21 -0800 |
commit | 24dc83635ffe3c93d8122099a83ee228c9b7e4f7 (patch) | |
tree | 4fafa40785d591a735c78ec3bbee7a05b944c1be /Documentation/devicetree/bindings/gpio/cdns,gpio.txt | |
parent | 7e59fad9c9d1aeacdc96dfffd35f9e12ddc34dbf (diff) | |
parent | a7c23f8d154f7919c5fcfceea6e0897be2d5ab71 (diff) |
Merge tag 'gpio-v4.21-1' 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 v4.21 kernel series.
Core changes:
- Some core changes are already in outside of this pull request as
they came through the regulator tree, most notably
devm_gpiod_unhinge() that removes devres refcount management from a
GPIO descriptor. This is needed in subsystems such as regulators
where the regulator core need to take over the reference counting
and lifecycle management for a GPIO descriptor.
- We dropped devm_gpiochip_remove() and devm_gpio_chip_match() as
nothing needs it. We can bring it back if need be.
- Add a global TODO so people see where we are going. This helps
setting the direction now that we are two GPIO maintainers.
- Handle the MMC CD/WP properties in the device tree core. (The bulk
of patches activating this code is already merged through the
MMC/SD tree.)
- Augment gpiochip_request_own_desc() to pass a flag so we as
gpiochips can request lines as active low or open drain etc even
from ourselves.
New drivers:
- New driver for Cadence GPIO blocks.
- New driver for Atmel SAMA5D2 PIOBU GPIO lines.
Driver improvements:
- A major refactoring of the PCA953x driver - this driver has been
around for ages, and is now modernized to reduce code duplication
that has stacked up and is using regmap to read write and cache
registers.
- Intel drivers are now maintained in a separate tree and start with
a round of cleanups and unifications"
* tag 'gpio-v4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (99 commits)
gpio: sama5d2-piobu: Depend on OF_GPIO
gpio: Add Cadence GPIO driver
dt-bindings: gpio: Add bindings for Cadence GPIO
gpiolib-acpi: remove unused variable 'err', cleans up build warning
gpio: mxs: read pin level directly instead of using .get
gpio: aspeed: remove duplicated statement
gpio: add driver for SAMA5D2 PIOBU pins
dt-bindings: arm: atmel: describe SECUMOD usage as a GPIO controller
gpio/mmc/of: Respect polarity in the device tree
dt-bindings: gpio: rcar: Add r8a774c0 (RZ/G2E) support
memory: omap-gpmc: Get the header of the enum
ARM: omap1: Fix new user of gpiochip_request_own_desc()
gpio: pca953x: Add regmap dependency for PCA953x driver
gpio: raspberrypi-exp: decrease refcount on firmware dt node
gpiolib: Fix return value of gpio_to_desc() stub if !GPIOLIB
gpio: pca953x: Restore registers after suspend/resume cycle
gpio: pca953x: Zap single use of pca953x_read_single()
gpio: pca953x: Zap ad-hoc reg_output cache
gpio: pca953x: Zap ad-hoc reg_direction cache
gpio: pca953x: Perform basic regmap conversion
...
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/cdns,gpio.txt')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/cdns,gpio.txt | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/cdns,gpio.txt b/Documentation/devicetree/bindings/gpio/cdns,gpio.txt new file mode 100644 index 000000000000..706ef00f5c64 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/cdns,gpio.txt @@ -0,0 +1,43 @@ +Cadence GPIO controller bindings + +Required properties: +- compatible: should be "cdns,gpio-r1p02". +- reg: the register base address and size. +- #gpio-cells: should be 2. + * first cell is the GPIO number. + * second cell specifies the GPIO flags, as defined in + <dt-bindings/gpio/gpio.h>. Only the GPIO_ACTIVE_HIGH + and GPIO_ACTIVE_LOW flags are supported. +- gpio-controller: marks the device as a GPIO controller. +- clocks: should contain one entry referencing the peripheral clock driving + the GPIO controller. + +Optional properties: +- ngpios: integer number of gpio lines supported by this controller, up to 32. +- interrupts: interrupt specifier for the controllers interrupt. +- interrupt-controller: marks the device as an interrupt controller. When + defined, interrupts, interrupt-parent and #interrupt-cells + are required. +- interrupt-cells: should be 2. + * first cell is the GPIO number you want to use as an IRQ source. + * second cell specifies the IRQ type, as defined in + <dt-bindings/interrupt-controller/irq.h>. + Currently only level sensitive IRQs are supported. + + +Example: + gpio0: gpio-controller@fd060000 { + compatible = "cdns,gpio-r1p02"; + reg =<0xfd060000 0x1000>; + + clocks = <&gpio_clk>; + + interrupt-parent = <&gic>; + interrupts = <0 5 IRQ_TYPE_LEVEL_HIGH>; + + gpio-controller; + #gpio-cells = <2>; + + interrupt-controller; + #interrupt-cells = <2>; + }; |