From 2e7dfb0e9cacad0f1adbc4b97f0b96ba35027f24 Mon Sep 17 00:00:00 2001 From: Samuel Holland Date: Sun, 13 Feb 2022 23:01:16 -0600 Subject: usb: typec: Factor out non-PD fwnode properties Basic programmable non-PD Type-C port controllers do not need the full TCPM library, but they share the same devicetree binding and the same typec_capability structure. Factor out a helper for parsing those properties which map to fields in struct typec_capability, so the code can be shared between TCPM and basic non-TCPM drivers. Reviewed-by: Heikki Krogerus Signed-off-by: Samuel Holland Link: https://lore.kernel.org/r/20220214050118.61015-4-samuel@sholland.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/typec/class.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) (limited to 'drivers/usb/typec/class.c') diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 45a6f0c807cb..ee0e520707dd 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -1894,6 +1894,49 @@ void *typec_get_drvdata(struct typec_port *port) } EXPORT_SYMBOL_GPL(typec_get_drvdata); +int typec_get_fw_cap(struct typec_capability *cap, + struct fwnode_handle *fwnode) +{ + const char *cap_str; + int ret; + + cap->fwnode = fwnode; + + ret = fwnode_property_read_string(fwnode, "power-role", &cap_str); + if (ret < 0) + return ret; + + ret = typec_find_port_power_role(cap_str); + if (ret < 0) + return ret; + cap->type = ret; + + /* USB data support is optional */ + ret = fwnode_property_read_string(fwnode, "data-role", &cap_str); + if (ret == 0) { + ret = typec_find_port_data_role(cap_str); + if (ret < 0) + return ret; + cap->data = ret; + } + + /* Get the preferred power role for a DRP */ + if (cap->type == TYPEC_PORT_DRP) { + cap->prefer_role = TYPEC_NO_PREFERRED_ROLE; + + ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str); + if (ret == 0) { + ret = typec_find_power_role(cap_str); + if (ret < 0) + return ret; + cap->prefer_role = ret; + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(typec_get_fw_cap); + /** * typec_port_register_altmode - Register USB Type-C Port Alternate Mode * @port: USB Type-C Port that supports the alternate mode -- cgit v1.2.3-70-g09d2