- 07 2月, 2014 1 次提交
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由 Philipp Zabel 提交于
The documentation was not clear about whether gpio_direction_output should take a logical value or the physical level on the output line, i.e. whether the ACTIVE_LOW status would be taken into account. This converts gpiod_direction_output to use the logical level and adds a new gpiod_direction_output_raw for the raw value. Signed-off-by: NPhilipp Zabel <p.zabel@pengutronix.de> Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com> Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
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- 20 10月, 2013 2 次提交
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由 Alexandre Courbot 提交于
Add gpiod_get(), gpiod_get_index() and gpiod_put() functions that provide safer management of GPIOs. These functions put the GPIO framework in line with the conventions of other frameworks in the kernel, and help ensure every GPIO is declared properly and valid while it is used. Signed-off-by: NAlexandre Courbot <acourbot@nvidia.com> Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
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由 Alexandre Courbot 提交于
This patch exports the gpiod_* family of API functions, a safer alternative to the legacy GPIO interface. Differences between the gpiod and legacy gpio APIs are: - gpio works with integers, whereas gpiod operates on opaque handlers which cannot be forged or used before proper acquisition - gpiod get/set functions are aware of the active low state of a GPIO - gpio consumers should now include <linux/gpio/consumer.h> to access the new interface, whereas chips drivers will use <linux/gpio/driver.h> The legacy gpio API is now built as inline functions on top of gpiod. Signed-off-by: NAlexandre Courbot <acourbot@nvidia.com> Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
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