Register mode switch devices for Type C connectors, when they are
specified by firmware. These control Type C configuration for any USB
Type-C mode switches (sometimes known as "muxes") which are controlled
by the Chrome EC.
Signed-off-by: Prashant Malani <pmalani@xxxxxxxxxxxx>
---
Changes since v2:
- Fixed missing "static" identifier.
Changes since v1:
- No changes.
drivers/platform/chrome/cros_typec_switch.c | 40 +++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/drivers/platform/chrome/cros_typec_switch.c b/drivers/platform/chrome/cros_typec_switch.c
index 7c01957a032d..024a2bb146b2 100644
--- a/drivers/platform/chrome/cros_typec_switch.c
+++ b/drivers/platform/chrome/cros_typec_switch.c
@@ -15,6 +15,7 @@
#include <linux/platform_device.h>
#include <linux/usb/typec_altmode.h>
#include <linux/usb/typec_dp.h>
+#include <linux/usb/typec_mux.h>
#include <linux/usb/typec_retimer.h>
#define DRV_NAME "cros-typec-switch"
@@ -22,6 +23,7 @@
/* Handles and other relevant data required for each port's switches. */
struct cros_typec_port {
int port_num;
+ struct typec_mux_dev *mode_switch;
struct typec_retimer *retimer;
struct cros_typec_switch_data *sdata;
};
@@ -147,6 +149,15 @@ static int cros_typec_configure_mux(struct cros_typec_switch_data *sdata, int po
return -ETIMEDOUT;
}
+static int cros_typec_mode_switch_set(struct typec_mux_dev *mode_switch,
+ struct typec_mux_state *state)
+{
+ struct cros_typec_port *port = typec_mux_get_drvdata(mode_switch);
+
+ /* Mode switches have index 0. */
+ return cros_typec_configure_mux(port->sdata, port->port_num, 0, state->mode, state->alt);
+}
+
static int cros_typec_retimer_set(struct typec_retimer *retimer, struct typec_retimer_state *state)
{
struct cros_typec_port *port = typec_retimer_get_drvdata(retimer);
@@ -163,9 +174,27 @@ static void cros_typec_unregister_switches(struct cros_typec_switch_data *sdata)
if (!sdata->ports[i])
continue;
typec_retimer_unregister(sdata->ports[i]->retimer);
+ typec_mux_unregister(sdata->ports[i]->mode_switch);
}
}
+static int cros_typec_register_mode_switch(struct cros_typec_port *port,
+ struct fwnode_handle *fwnode)
+{
+ struct typec_mux_desc mode_switch_desc = {
+ .fwnode = fwnode,
+ .drvdata = port,
+ .name = fwnode_get_name(fwnode),
+ .set = cros_typec_mode_switch_set,
+ };
+
+ port->mode_switch = typec_mux_register(port->sdata->dev, &mode_switch_desc);
+ if (IS_ERR(port->mode_switch))
+ return PTR_ERR(port->mode_switch);
+
+ return 0;
+}
+
static int cros_typec_register_retimer(struct cros_typec_port *port, struct fwnode_handle *fwnode)
{
struct typec_retimer_desc retimer_desc = {
@@ -235,6 +264,17 @@ static int cros_typec_register_switches(struct cros_typec_switch_data *sdata)
}
dev_dbg(dev, "Retimer switch registered for index %llu\n", index);
+
+ if (!fwnode_property_read_bool(fwnode, "mode-switch"))
+ continue;
+
+ ret = cros_typec_register_mode_switch(port, fwnode);
+ if (ret) {
+ dev_err(dev, "Mode switch register failed\n");
+ goto err_switch;
+ }
+
+ dev_dbg(dev, "Mode switch registered for index %llu\n", index);
}
return 0;
--
2.37.0.rc0.161.g10f37bed90-goog
