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authorPrashant Malani <pmalani@chromium.org>2020-11-16 23:11:40 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-11-18 14:55:46 +0300
commita0ccdc4a77a1b36b682ae60361879eca0a0f88d6 (patch)
tree87efac4589cad63f175e81b86171b315b9f7756b /include/linux/usb
parent8a5ca78f603977d6b9b2d7dcb3b1b6ef601d3cc7 (diff)
downloadlinux-a0ccdc4a77a1b36b682ae60361879eca0a0f88d6.tar.xz
usb: typec: Add number of altmodes partner attr
Add a user-visible attribute for the number of alternate modes available in a partner. This allows userspace to determine whether there are any remaining alternate modes left to be registered by the kernel driver. It can begin executing any policy state machine after all available alternate modes have been registered with the connector class framework. This value is set to "-1" initially, signifying that a valid number of alternate modes haven't been set for the partner. Also add a sysfs file which exposes this attribute. The file remains hidden as long as the attribute value is -1. Cc: Benson Leung <bleung@chromium.org> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Prashant Malani <pmalani@chromium.org> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Link: https://lore.kernel.org/r/20201116201150.2919178-3-pmalani@chromium.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb')
-rw-r--r--include/linux/usb/typec.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index 6be558045942..bc6b1a71cb8a 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -126,6 +126,7 @@ struct typec_altmode_desc {
enum typec_port_data roles;
};
+int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes);
struct typec_altmode
*typec_partner_register_altmode(struct typec_partner *partner,
const struct typec_altmode_desc *desc);