gpiolib: Kill unused GPIOF_OPEN_*
There is no use of the GPIOF_OPEN_* 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>
This commit is contained in:
Andy Shevchenko
Bartosz Golaszewski
parent
2f804aca48
commit
9df8c63c2b
@ -319,8 +319,6 @@ where 'flags' is currently defined to specify the following properties:
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* GPIOF_INIT_LOW - as output, set initial level to LOW
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* GPIOF_INIT_HIGH - as output, set initial level to HIGH
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* GPIOF_OPEN_DRAIN - gpio pin is open drain type.
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* GPIOF_OPEN_SOURCE - gpio pin is open source type.
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since GPIOF_INIT_* are only valid when configured as output, so group valid
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combinations as:
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@ -329,20 +327,6 @@ combinations as:
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* GPIOF_OUT_INIT_LOW - configured as output, initial level LOW
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* GPIOF_OUT_INIT_HIGH - configured as output, initial level HIGH
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When setting the flag as GPIOF_OPEN_DRAIN then it will assume that pins is
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open drain type. Such pins will not be driven to 1 in output mode. It is
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require to connect pull-up on such pins. By enabling this flag, gpio lib will
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make the direction to input when it is asked to set value of 1 in output mode
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to make the pin HIGH. The pin is make to LOW by driving value 0 in output mode.
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When setting the flag as GPIOF_OPEN_SOURCE then it will assume that pins is
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open source type. Such pins will not be driven to 0 in output mode. It is
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require to connect pull-down on such pin. By enabling this flag, gpio lib will
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make the direction to input when it is asked to set value of 0 in output mode
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to make the pin LOW. The pin is make to HIGH by driving value 1 in output mode.
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In the future, these flags can be extended to support more properties.
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Further more, to ease the claim/release of multiple GPIOs, 'struct gpio' is
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introduced to encapsulate all three fields as::
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@ -294,8 +294,6 @@ gpio_request()前将这类细节配置好，例如使用引脚控制子系统的
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* GPIOF_INIT_LOW - 在作为输出时,初始值为低电平
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* GPIOF_INIT_HIGH - 在作为输出时,初始值为高电平
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* GPIOF_OPEN_DRAIN - gpio引脚为开漏信号
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* GPIOF_OPEN_SOURCE - gpio引脚为源极开路信号
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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:
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@ -303,18 +301,6 @@ gpio_request()前将这类细节配置好，例如使用引脚控制子系统的
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* GPIOF_OUT_INIT_LOW - 配置为输出,并初始化为低电平
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* GPIOF_OUT_INIT_HIGH - 配置为输出,并初始化为高电平
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当设置 flag 为 GPIOF_OPEN_DRAIN 时，则假设引脚是开漏信号。这样的引脚
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将不会在输出模式下置1。这样的引脚需要连接上拉电阻。通过使能这个标志，gpio库
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将会在被要求输出模式下置1时将引脚变为输入状态来使引脚置高。引脚在输出模式下
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通过置0使其输出低电平。
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当设置 flag 为 GPIOF_OPEN_SOURCE 时，则假设引脚为源极开路信号。这样的引脚
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将不会在输出模式下置0。这样的引脚需要连接下拉电阻。通过使能这个标志，gpio库
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将会在被要求输出模式下置0时将引脚变为输入状态来使引脚置低。引脚在输出模式下
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通过置1使其输出高电平。
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将来这些标志可能扩展到支持更多的属性。
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更进一步,为了更简单地声明/释放多个 GPIO,'struct gpio'被引进来封装所有
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这三个领域::
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@ -300,8 +300,6 @@ gpio_request()前將這類細節配置好，例如使用 pinctrl 子系統的映
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* GPIOF_INIT_LOW - 在作爲輸出時,初始值爲低電平
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* GPIOF_INIT_HIGH - 在作爲輸出時,初始值爲高電平
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* GPIOF_OPEN_DRAIN - gpio引腳爲開漏信號
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* GPIOF_OPEN_SOURCE - gpio引腳爲源極開路信號
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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:
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@ -309,18 +307,6 @@ gpio_request()前將這類細節配置好，例如使用 pinctrl 子系統的映
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* GPIOF_OUT_INIT_LOW - 配置爲輸出,並初始化爲低電平
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* GPIOF_OUT_INIT_HIGH - 配置爲輸出,並初始化爲高電平
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當設置 flag 爲 GPIOF_OPEN_DRAIN 時，則假設引腳是開漏信號。這樣的引腳
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將不會在輸出模式下置1。這樣的引腳需要連接上拉電阻。通過使能這個標誌，gpio庫
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將會在被要求輸出模式下置1時將引腳變爲輸入狀態來使引腳置高。引腳在輸出模式下
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通過置0使其輸出低電平。
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當設置 flag 爲 GPIOF_OPEN_SOURCE 時，則假設引腳爲源極開路信號。這樣的引腳
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將不會在輸出模式下置0。這樣的引腳需要連接下拉電阻。通過使能這個標誌，gpio庫
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將會在被要求輸出模式下置0時將引腳變爲輸入狀態來使引腳置低。引腳在輸出模式下
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通過置1使其輸出高電平。
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將來這些標誌可能擴展到支持更多的屬性。
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更進一步,爲了更簡單地聲明/釋放多個 GPIO,'struct gpio'被引進來封裝所有
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這三個領域:
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@ -33,12 +33,6 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
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if (err)
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return err;
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if (flags & GPIOF_OPEN_DRAIN)
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set_bit(FLAG_OPEN_DRAIN, &desc->flags);
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if (flags & GPIOF_OPEN_SOURCE)
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set_bit(FLAG_OPEN_SOURCE, &desc->flags);
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if (flags & GPIOF_ACTIVE_LOW)
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set_bit(FLAG_ACTIVE_LOW, &desc->flags);
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@ -32,12 +32,6 @@ struct device;
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/* Gpio pin is active-low */
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#define GPIOF_ACTIVE_LOW (1 << 2)
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/* Gpio pin is open drain */
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#define GPIOF_OPEN_DRAIN (1 << 3)
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/* Gpio pin is open source */
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#define GPIOF_OPEN_SOURCE (1 << 4)
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/**
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* struct gpio - a structure describing a GPIO with configuration
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* @gpio: the GPIO number
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