gpiolib: Kill unused GPIOF_EXPORT and Co

There is no use of the GPIOF_EXPORT in the kernel. Kill it for good.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Documentation/driver-api/gpio/legacy.rst

@@ -322,9 +322,6 @@ where 'flags' is currently defined to specify the following properties:
 	* GPIOF_OPEN_DRAIN	- gpio pin is open drain type.
 	* GPIOF_OPEN_SOURCE	- gpio pin is open source type.
 
-	* GPIOF_EXPORT_DIR_FIXED	- export gpio to sysfs, keep direction
-	* GPIOF_EXPORT_DIR_CHANGEABLE	- also export, allow changing direction
-
 since GPIOF_INIT_* are only valid when configured as output, so group valid
 combinations as:
 

Documentation/translations/zh_CN/driver-api/gpio/legacy.rst

@@ -297,9 +297,6 @@ gpio_request()前将这类细节配置好，例如使用引脚控制子系统的
 	* GPIOF_OPEN_DRAIN	- gpio引脚为开漏信号
 	* GPIOF_OPEN_SOURCE	- gpio引脚为源极开路信号
 
-	* GPIOF_EXPORT_DIR_FIXED	- 将 gpio 导出到 sysfs，并保持方向
-	* GPIOF_EXPORT_DIR_CHANGEABLE	- 同样是导出, 但允许改变方向
-
 因为 GPIOF_INIT_* 仅有在配置为输出的时候才存在,所以有效的组合为:
 
 	* GPIOF_IN		- 配置为输入

Documentation/translations/zh_TW/gpio.txt

@@ -303,9 +303,6 @@ gpio_request()前將這類細節配置好，例如使用 pinctrl 子系統的映
 	* GPIOF_OPEN_DRAIN	- gpio引腳爲開漏信號
 	* GPIOF_OPEN_SOURCE	- gpio引腳爲源極開路信號
 
-	* GPIOF_EXPORT_DIR_FIXED	- 將 gpio 導出到 sysfs，並保持方向
-	* GPIOF_EXPORT_DIR_CHANGEABLE	- 同樣是導出, 但允許改變方向
-
 因爲 GPIOF_INIT_* 僅有在配置爲輸出的時候才存在,所以有效的組合爲:
 
 	* GPIOF_IN		- 配置爲輸入

drivers/gpio/gpiolib-legacy.c

@@ -51,12 +51,6 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
 	if (err)
 		goto free_gpio;
 
-	if (flags & GPIOF_EXPORT) {
-		err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE);
-		if (err)
-			goto free_gpio;
-	}
-
 	return 0;
 
  free_gpio:

include/linux/gpio.h

@@ -38,11 +38,6 @@ struct device;
 /* Gpio pin is open source */
 #define GPIOF_OPEN_SOURCE	(1 << 4)
 
-#define GPIOF_EXPORT		(1 << 5)
-#define GPIOF_EXPORT_CHANGEABLE	(1 << 6)
-#define GPIOF_EXPORT_DIR_FIXED	(GPIOF_EXPORT)
-#define GPIOF_EXPORT_DIR_CHANGEABLE (GPIOF_EXPORT | GPIOF_EXPORT_CHANGEABLE)
-
 /**
  * struct gpio - a structure describing a GPIO with configuration
  * @gpio:	the GPIO number