mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Frank LiandLinus Walleij
05e58da46d
Add new API devm_mux_state_get_from_np() to retrieve a mux control from
a specified child device node.
Make devm_mux_state_get() call devm_mux_state_get_from_np() with a NULL
node parameter, which defaults to using the device's own of_node.
Support the following DT schema:
pinctrl@0 {
uart-func {
mux-state = <&mux_chip 0>;
};
spi-func {
mux-state = <&mux_chip 1>;
};
};
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
171 lines
4.7 KiB
C
171 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* mux/consumer.h - definitions for the multiplexer consumer interface
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*
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* Copyright (C) 2017 Axentia Technologies AB
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*
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* Author: Peter Rosin <peda@axentia.se>
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*/
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#ifndef _LINUX_MUX_CONSUMER_H
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#define _LINUX_MUX_CONSUMER_H
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#include <linux/compiler.h>
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struct device;
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struct mux_control;
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struct mux_state;
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#if IS_ENABLED(CONFIG_MULTIPLEXER)
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unsigned int mux_control_states(struct mux_control *mux);
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int __must_check mux_control_select_delay(struct mux_control *mux,
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unsigned int state,
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unsigned int delay_us);
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int __must_check mux_state_select_delay(struct mux_state *mstate,
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unsigned int delay_us);
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int __must_check mux_control_try_select_delay(struct mux_control *mux,
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unsigned int state,
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unsigned int delay_us);
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int __must_check mux_state_try_select_delay(struct mux_state *mstate,
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unsigned int delay_us);
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static inline int __must_check mux_control_select(struct mux_control *mux,
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unsigned int state)
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{
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return mux_control_select_delay(mux, state, 0);
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}
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static inline int __must_check mux_state_select(struct mux_state *mstate)
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{
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return mux_state_select_delay(mstate, 0);
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}
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static inline int __must_check mux_control_try_select(struct mux_control *mux,
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unsigned int state)
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{
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return mux_control_try_select_delay(mux, state, 0);
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}
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static inline int __must_check mux_state_try_select(struct mux_state *mstate)
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{
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return mux_state_try_select_delay(mstate, 0);
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}
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int mux_control_deselect(struct mux_control *mux);
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int mux_state_deselect(struct mux_state *mstate);
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struct mux_control *mux_control_get(struct device *dev, const char *mux_name);
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struct mux_control *mux_control_get_optional(struct device *dev, const char *mux_name);
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void mux_control_put(struct mux_control *mux);
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struct mux_control *devm_mux_control_get(struct device *dev, const char *mux_name);
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struct mux_state *
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devm_mux_state_get_from_np(struct device *dev, const char *mux_name, struct device_node *np);
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struct mux_state *devm_mux_state_get_optional(struct device *dev, const char *mux_name);
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struct mux_state *devm_mux_state_get_selected(struct device *dev, const char *mux_name);
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struct mux_state *devm_mux_state_get_optional_selected(struct device *dev, const char *mux_name);
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#else
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static inline unsigned int mux_control_states(struct mux_control *mux)
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{
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return 0;
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}
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static inline int __must_check mux_control_select_delay(struct mux_control *mux,
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unsigned int state, unsigned int delay_us)
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{
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return -EOPNOTSUPP;
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}
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static inline int __must_check mux_state_select_delay(struct mux_state *mstate,
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unsigned int delay_us)
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{
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return -EOPNOTSUPP;
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}
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static inline int __must_check mux_control_try_select_delay(struct mux_control *mux,
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unsigned int state,
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unsigned int delay_us)
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{
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return -EOPNOTSUPP;
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}
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static inline int __must_check mux_state_try_select_delay(struct mux_state *mstate,
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unsigned int delay_us)
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{
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return -EOPNOTSUPP;
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}
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static inline int __must_check mux_control_select(struct mux_control *mux,
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unsigned int state)
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{
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return -EOPNOTSUPP;
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}
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static inline int __must_check mux_state_select(struct mux_state *mstate)
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{
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return -EOPNOTSUPP;
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}
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static inline int __must_check mux_control_try_select(struct mux_control *mux,
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unsigned int state)
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{
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return -EOPNOTSUPP;
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}
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static inline int __must_check mux_state_try_select(struct mux_state *mstate)
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{
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return -EOPNOTSUPP;
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}
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static inline int mux_control_deselect(struct mux_control *mux)
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{
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return -EOPNOTSUPP;
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}
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static inline int mux_state_deselect(struct mux_state *mstate)
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{
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return -EOPNOTSUPP;
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}
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static inline struct mux_control *mux_control_get(struct device *dev, const char *mux_name)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline struct mux_control *mux_control_get_optional(struct device *dev,
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const char *mux_name)
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{
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return NULL;
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}
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static inline void mux_control_put(struct mux_control *mux) {}
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static inline struct mux_control *devm_mux_control_get(struct device *dev, const char *mux_name)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline struct mux_state *devm_mux_state_get(struct device *dev, const char *mux_name)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline struct mux_state *devm_mux_state_get_optional(struct device *dev,
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const char *mux_name)
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{
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return NULL;
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}
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static inline struct mux_state *devm_mux_state_get_selected(struct device *dev,
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const char *mux_name)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline struct mux_state *devm_mux_state_get_optional_selected(struct device *dev,
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const char *mux_name)
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{
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return NULL;
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}
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#endif /* CONFIG_MULTIPLEXER */
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#define devm_mux_state_get(dev, mux_name) \
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devm_mux_state_get_from_np(dev, mux_name, NULL)
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#endif /* _LINUX_MUX_CONSUMER_H */
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