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| author | Linus Walleij <linus.walleij@linaro.org> | 2019-09-03 16:04:19 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-09-03 16:04:19 +0200 |
| commit | 8a6abcd04e4cdf6088f11212570c3e5ec36ee5c3 (patch) | |
| tree | 21dfb07a1789424d20c2a8f2f8989f8c19ef48b3 /Documentation/driver-api/gpio/driver.rst | |
| parent | gpio: zynq: Pass irqchip when adding gpiochip (diff) | |
| parent | gpio: lpc32xx: allow building on non-lpc32xx targets (diff) | |
| download | linux-8a6abcd04e4cdf6088f11212570c3e5ec36ee5c3.tar.xz linux-8a6abcd04e4cdf6088f11212570c3e5ec36ee5c3.zip | |
Merge tag 'gpio-v5.4-updates-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into devel
gpio: updates for v5.4
- use a helper variable for &pdev->dev in gpio-em
- tweak the ifdefs in GPIO headers
- fix function links in HTML docs
- remove an unneeded error message from ixp4xx
- use the optional clk_get in gpio-mxc instead of checking the return value
- a couple improvements in pca953x
- allow to build gpio-lpc32xx on non-lpc32xx targets
Diffstat (limited to 'Documentation/driver-api/gpio/driver.rst')
| -rw-r--r-- | Documentation/driver-api/gpio/driver.rst | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/Documentation/driver-api/gpio/driver.rst b/Documentation/driver-api/gpio/driver.rst index 5e96dbc7f4e7..3fdb32422f8a 100644 --- a/Documentation/driver-api/gpio/driver.rst +++ b/Documentation/driver-api/gpio/driver.rst @@ -69,9 +69,9 @@ driver code: The code implementing a gpio_chip should support multiple instances of the controller, preferably using the driver model. That code will configure each -gpio_chip and issue ``gpiochip_add[_data]()`` or ``devm_gpiochip_add_data()``. -Removing a GPIO controller should be rare; use ``[devm_]gpiochip_remove()`` -when it is unavoidable. +gpio_chip and issue gpiochip_add(), gpiochip_add_data(), or +devm_gpiochip_add_data(). Removing a GPIO controller should be rare; use +gpiochip_remove() when it is unavoidable. Often a gpio_chip is part of an instance-specific structure with states not exposed by the GPIO interfaces, such as addressing, power management, and more. @@ -512,11 +512,11 @@ available but we try to move away from this: If there is a need to exclude certain GPIO lines from the IRQ domain handled by these helpers, we can set .irq.need_valid_mask of the gpiochip before -``[devm_]gpiochip_add_data()`` is called. This allocates an .irq.valid_mask with as -many bits set as there are GPIO lines in the chip, each bit representing line -0..n-1. Drivers can exclude GPIO lines by clearing bits from this mask. The mask -must be filled in before gpiochip_irqchip_add() or gpiochip_irqchip_add_nested() -is called. +devm_gpiochip_add_data() or gpiochip_add_data() is called. This allocates an +.irq.valid_mask with as many bits set as there are GPIO lines in the chip, each +bit representing line 0..n-1. Drivers can exclude GPIO lines by clearing bits +from this mask. The mask must be filled in before gpiochip_irqchip_add() or +gpiochip_irqchip_add_nested() is called. To use the helpers please keep the following in mind: |