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17b5b576ff
Hardware may require some time for the muxed analog signals to settle after the muxing is changed. Allow users of the mux subsystem to specify this delay with the new mux_control_select_delay() function (and the _try equivalent). Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Tested-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Peter Rosin <peda@axentia.se> Link: https://lore.kernel.org/r/20211007134641.13417-2-vincent.whitchurch@axis.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
46 lines
1.3 KiB
C
46 lines
1.3 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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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_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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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_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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int mux_control_deselect(struct mux_control *mux);
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struct mux_control *mux_control_get(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,
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const char *mux_name);
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#endif /* _LINUX_MUX_CONSUMER_H */
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