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platform/chrome: cros_ec_typec: Register Type C switches
Register Type C mux and switch handles, when provided via firmware bindings. These will allow the cros-ec-typec driver, and also alternate mode drivers to configure connected Muxes correctly, according to PD information retrieved from the Chrome OS EC. Signed-off-by: Prashant Malani <pmalani@chromium.org> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
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@ -14,6 +14,8 @@
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#include <linux/platform_data/cros_usbpd_notify.h>
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#include <linux/platform_device.h>
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#include <linux/usb/typec.h>
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#include <linux/usb/typec_mux.h>
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#include <linux/usb/role.h>
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#define DRV_NAME "cros-ec-typec"
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@ -25,6 +27,9 @@ struct cros_typec_port {
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struct typec_partner *partner;
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/* Port partner PD identity info. */
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struct usb_pd_identity p_identity;
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struct typec_switch *ori_sw;
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struct typec_mux *mux;
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struct usb_role_switch *role_sw;
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};
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/* Platform-specific data for the Chrome OS EC Type C controller. */
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@ -84,6 +89,40 @@ static int cros_typec_parse_port_props(struct typec_capability *cap,
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return 0;
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}
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static int cros_typec_get_switch_handles(struct cros_typec_port *port,
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struct fwnode_handle *fwnode,
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struct device *dev)
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{
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port->mux = fwnode_typec_mux_get(fwnode, NULL);
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if (IS_ERR(port->mux)) {
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dev_dbg(dev, "Mux handle not found.\n");
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goto mux_err;
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}
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port->ori_sw = fwnode_typec_switch_get(fwnode);
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if (IS_ERR(port->ori_sw)) {
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dev_dbg(dev, "Orientation switch handle not found.\n");
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goto ori_sw_err;
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}
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port->role_sw = fwnode_usb_role_switch_get(fwnode);
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if (IS_ERR(port->role_sw)) {
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dev_dbg(dev, "USB role switch handle not found.\n");
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goto role_sw_err;
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}
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return 0;
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role_sw_err:
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usb_role_switch_put(port->role_sw);
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ori_sw_err:
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typec_switch_put(port->ori_sw);
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mux_err:
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typec_mux_put(port->mux);
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return -ENODEV;
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}
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static void cros_unregister_ports(struct cros_typec_data *typec)
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{
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int i;
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@ -91,6 +130,9 @@ static void cros_unregister_ports(struct cros_typec_data *typec)
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for (i = 0; i < typec->num_ports; i++) {
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if (!typec->ports[i])
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continue;
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usb_role_switch_put(typec->ports[i]->role_sw);
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typec_switch_put(typec->ports[i]->ori_sw);
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typec_mux_put(typec->ports[i]->mux);
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typec_unregister_port(typec->ports[i]->port);
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}
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}
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@ -153,6 +195,11 @@ static int cros_typec_init_ports(struct cros_typec_data *typec)
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ret = PTR_ERR(cros_port->port);
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goto unregister_ports;
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}
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ret = cros_typec_get_switch_handles(cros_port, fwnode, dev);
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if (ret)
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dev_dbg(dev, "No switch control for port %d\n",
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port_num);
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}
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return 0;
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