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platform/chrome: cros_ec_typec: Register Type C switches

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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>
This commit is contained in:
Prashant Malani 2020-05-19 14:46:04 -07:00 • committed by Enric Balletbo i Serra
parent d378cdd011
commit f28adb41da
1 changed files with 47 additions and 0 deletions
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47
drivers/platform/chrome/cros_ec_typec.c
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@ -14,6 +14,8 @@
#include <linux/platform_data/cros_usbpd_notify.h> #include <linux/platform_data/cros_usbpd_notify.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/usb/typec.h> #include <linux/usb/typec.h>
#include <linux/usb/typec_mux.h>
#include <linux/usb/role.h>
#define DRV_NAME "cros-ec-typec" #define DRV_NAME "cros-ec-typec"
@ -25,6 +27,9 @@ struct cros_typec_port {
struct typec_partner *partner; struct typec_partner *partner;
/* Port partner PD identity info. */ /* Port partner PD identity info. */
struct usb_pd_identity p_identity; struct usb_pd_identity p_identity;
struct typec_switch *ori_sw;
struct typec_mux *mux;
struct usb_role_switch *role_sw;
}; };
/* Platform-specific data for the Chrome OS EC Type C controller. */ /* Platform-specific data for the Chrome OS EC Type C controller. */
@ -84,6 +89,40 @@ static int cros_typec_parse_port_props(struct typec_capability *cap,
return 0; return 0;
} }
static int cros_typec_get_switch_handles(struct cros_typec_port *port,
struct fwnode_handle *fwnode,
struct device *dev)
{
port->mux = fwnode_typec_mux_get(fwnode, NULL);
if (IS_ERR(port->mux)) {
dev_dbg(dev, "Mux handle not found.\n");
goto mux_err;
}
port->ori_sw = fwnode_typec_switch_get(fwnode);
if (IS_ERR(port->ori_sw)) {
dev_dbg(dev, "Orientation switch handle not found.\n");
goto ori_sw_err;
}
port->role_sw = fwnode_usb_role_switch_get(fwnode);
if (IS_ERR(port->role_sw)) {
dev_dbg(dev, "USB role switch handle not found.\n");
goto role_sw_err;
}
return 0;
role_sw_err:
usb_role_switch_put(port->role_sw);
ori_sw_err:
typec_switch_put(port->ori_sw);
mux_err:
typec_mux_put(port->mux);
return -ENODEV;
}
static void cros_unregister_ports(struct cros_typec_data *typec) static void cros_unregister_ports(struct cros_typec_data *typec)
{ {
int i; int i;
@ -91,6 +130,9 @@ static void cros_unregister_ports(struct cros_typec_data *typec)
for (i = 0; i < typec->num_ports; i++) { for (i = 0; i < typec->num_ports; i++) {
if (!typec->ports[i]) if (!typec->ports[i])
continue; continue;
usb_role_switch_put(typec->ports[i]->role_sw);
typec_switch_put(typec->ports[i]->ori_sw);
typec_mux_put(typec->ports[i]->mux);
typec_unregister_port(typec->ports[i]->port); typec_unregister_port(typec->ports[i]->port);
} }
} }
@ -153,6 +195,11 @@ static int cros_typec_init_ports(struct cros_typec_data *typec)
ret = PTR_ERR(cros_port->port); ret = PTR_ERR(cros_port->port);
goto unregister_ports; goto unregister_ports;
} }
ret = cros_typec_get_switch_handles(cros_port, fwnode, dev);
if (ret)
dev_dbg(dev, "No switch control for port %d\n",
port_num);
} }
return 0; return 0;