39 lines
1.7 KiB
C
39 lines
1.7 KiB
C
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/* 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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