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usb: typec: mux: Allow muxes to specify mode-switch

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Loosen the typec_mux_match() requirements so that searches where an
alt mode is not specified, but the target mux device lists the
"mode-switch" property, return a success.

This is helpful in Type C port drivers which would like to get a pointer
to the mux switch associated with a Type C port, but don't want to
specify a particular alt mode.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20220615172129.1314056-2-pmalani@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Prashant Malani 2022-06-15 17:20:17 +00:00 committed by Greg Kroah-Hartman
parent d9be8d5c5b
commit 144a96f7f9
1 changed files with 6 additions and 2 deletions
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8
drivers/usb/typec/mux.c
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@ -281,9 +281,13 @@ static void *typec_mux_match(struct fwnode_handle *fwnode, const char *id,
if (match)
goto find_mux;
/* Accessory Mode muxes */
if (!desc) {
match = fwnode_property_present(fwnode, "accessory");
/*
* Accessory Mode muxes & muxes which explicitly specify
* the required identifier can avoid SVID matching.
*/
match = fwnode_property_present(fwnode, "accessory") ||
fwnode_property_present(fwnode, id);
if (match)
goto find_mux;
return NULL;