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166a85e442
Remove gpiod_sysfs_set_active_low (and gpio_sysfs_set_active_low) which allowed code to change the polarity of a gpio line even after it had been exported through sysfs. Drivers should not care, and generally does not know, about gpio-line polarity which is a hardware feature that needs to be described by firmware. It is currently possible to define gpio-line polarity in device-tree and acpi firmware or using platform data. Userspace can also change the polarity through sysfs. Note that drivers using the legacy gpio interface could still use GPIOF_ACTIVE_LOW to change the polarity before exporting the gpio. There are no in-kernel users of this interface. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Harry Wei <harryxiyou@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-doc@vger.kernel.org Cc: linux-kernel@zh-kernel.org Cc: linux-arch@vger.kernel.org Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> |
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| .. | ||
| arm | ||
| arm64 | ||
| filesystems | ||
| video4linux | ||
| basic_profiling.txt | ||
| CodingStyle | ||
| email-clients.txt | ||
| gpio.txt | ||
| HOWTO | ||
| io_ordering.txt | ||
| IRQ.txt | ||
| magic-number.txt | ||
| oops-tracing.txt | ||
| SecurityBugs | ||
| sparse.txt | ||
| stable_api_nonsense.txt | ||
| stable_kernel_rules.txt | ||
| SubmittingDrivers | ||
| SubmittingPatches | ||
| volatile-considered-harmful.txt | ||