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38 lines
1.7 KiB
38 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Standard pin control state definitions |
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*/ |
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#ifndef __LINUX_PINCTRL_PINCTRL_STATE_H |
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#define __LINUX_PINCTRL_PINCTRL_STATE_H |
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/** |
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* @PINCTRL_STATE_DEFAULT: the state the pinctrl handle shall be put |
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* into as default, usually this means the pins are up and ready to |
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* be used by the device driver. This state is commonly used by |
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* hogs to configure muxing and pins at boot, and also as a state |
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* to go into when returning from sleep and idle in |
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* .pm_runtime_resume() or ordinary .resume() for example. |
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* @PINCTRL_STATE_INIT: normally the pinctrl will be set to "default" |
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* before the driver's probe() function is called. There are some |
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* drivers where that is not appropriate becausing doing so would |
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* glitch the pins. In those cases you can add an "init" pinctrl |
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* which is the state of the pins before drive probe. After probe |
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* if the pins are still in "init" state they'll be moved to |
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* "default". |
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* @PINCTRL_STATE_IDLE: the state the pinctrl handle shall be put into |
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* when the pins are idle. This is a state where the system is relaxed |
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* but not fully sleeping - some power may be on but clocks gated for |
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* example. Could typically be set from a pm_runtime_suspend() or |
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* pm_runtime_idle() operation. |
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* @PINCTRL_STATE_SLEEP: the state the pinctrl handle shall be put into |
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* when the pins are sleeping. This is a state where the system is in |
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* its lowest sleep state. Could typically be set from an |
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* ordinary .suspend() function. |
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*/ |
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#define PINCTRL_STATE_DEFAULT "default" |
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#define PINCTRL_STATE_INIT "init" |
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#define PINCTRL_STATE_IDLE "idle" |
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#define PINCTRL_STATE_SLEEP "sleep" |
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#endif /* __LINUX_PINCTRL_PINCTRL_STATE_H */
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