diff options
| author | Vincent Whitchurch <vincent.whitchurch@axis.com> | 2021-10-07 16:46:39 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-10-21 22:02:42 +0300 |
| commit | 17b5b576ff5faff99a4c8140d521cd4d7fff5c16 (patch) | |
| tree | c0b7b88fc7c5bea50391a4322156218ed37fdfe8 /include/linux/mux/consumer.h | |
| parent | 796e5d0b1e9baa2c80c234efd54d561e6d1cf1e7 (diff) | |
| download | linux-17b5b576ff5faff99a4c8140d521cd4d7fff5c16.tar.xz | |
mux: add support for delay after muxing
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>
Diffstat (limited to 'include/linux/mux/consumer.h')
| -rw-r--r-- | include/linux/mux/consumer.h | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/include/linux/mux/consumer.h b/include/linux/mux/consumer.h index 5fc6bb2fefad..7a09b040ac39 100644 --- a/include/linux/mux/consumer.h +++ b/include/linux/mux/consumer.h @@ -16,10 +16,25 @@ struct device; struct mux_control; unsigned int mux_control_states(struct mux_control *mux); -int __must_check mux_control_select(struct mux_control *mux, - unsigned int state); -int __must_check mux_control_try_select(struct mux_control *mux, - unsigned int state); +int __must_check mux_control_select_delay(struct mux_control *mux, + unsigned int state, + unsigned int delay_us); +int __must_check mux_control_try_select_delay(struct mux_control *mux, + unsigned int state, + unsigned int delay_us); + +static inline int __must_check mux_control_select(struct mux_control *mux, + unsigned int state) +{ + return mux_control_select_delay(mux, state, 0); +} + +static inline int __must_check mux_control_try_select(struct mux_control *mux, + unsigned int state) +{ + return mux_control_try_select_delay(mux, state, 0); +} + int mux_control_deselect(struct mux_control *mux); struct mux_control *mux_control_get(struct device *dev, const char *mux_name); |