diff options
author | Arnd Bergmann <arnd@arndb.de> | 2023-02-07 17:29:45 +0300 |
---|---|---|
committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2023-03-06 13:33:01 +0300 |
commit | d74e316633e49f44756c23997fa071979a939405 (patch) | |
tree | e0e465bb5ad25bfeee3dff9a51ef3d6e63735e0e /Documentation/translations/zh_CN | |
parent | 0e685c3e7158d35626d6d76b9f859eae806d87fa (diff) | |
download | linux-d74e316633e49f44756c23997fa071979a939405.tar.xz |
gpiolib: remove legacy gpio_export()
There are only a handful of users of gpio_export() and
related functions.
As these are just wrappers around the modern gpiod_export()
helper, remove the wrappers and open-code the gpio_to_desc
in all callers to shrink the legacy API.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'Documentation/translations/zh_CN')
-rw-r--r-- | Documentation/translations/zh_CN/driver-api/gpio/legacy.rst | 19 |
1 files changed, 0 insertions, 19 deletions
diff --git a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst index dee2a0517c1c..84ce2322fdba 100644 --- a/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst +++ b/Documentation/translations/zh_CN/driver-api/gpio/legacy.rst @@ -653,25 +653,6 @@ GPIO 控制器的路径类似 /sys/class/gpio/gpiochip42/ (对于从#42 GPIO 确定给定信号所用的 GPIO 编号。 -从内核代码中导出 ----------------- - -内核代码可以明确地管理那些已通过 gpio_request()申请的 GPIO 的导出:: - - /* 导出 GPIO 到用户空间 */ - int gpio_export(unsigned gpio, bool direction_may_change); - - /* gpio_export()的逆操作 */ - void gpio_unexport(); - -在一个内核驱动申请一个 GPIO 之后,它可以通过 gpio_export()使其在 sysfs -接口中可见。该驱动可以控制信号方向是否可修改。这有助于防止用户空间代码无意间 -破坏重要的系统状态。 - -这个明确的导出有助于(通过使某些实验更容易来)调试,也可以提供一个始终存在的接口, -与文档配合作为板级支持包的一部分。 - - API参考 ======= |