diff options
author | Prashant Malani <pmalani@chromium.org> | 2022-08-17 00:48:33 +0300 |
---|---|---|
committer | Prashant Malani <pmalani@chromium.org> | 2022-08-19 01:20:36 +0300 |
commit | 9e6e05169980e83a870dd595012ec014a5fc440c (patch) | |
tree | bc938d4539e0636d84ee367deb7a53059341edef /drivers/platform/chrome | |
parent | cf6c767244ed599492ac4275d1d94435d9ec7917 (diff) | |
download | linux-9e6e05169980e83a870dd595012ec014a5fc440c.tar.xz |
platform/chrome: cros_typec_switch: Register mode switches
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 ChromeOS EC.
Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20220816214857.2088914-6-pmalani@chromium.org
Diffstat (limited to 'drivers/platform/chrome')
-rw-r--r-- | drivers/platform/chrome/cros_typec_switch.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_typec_switch.c b/drivers/platform/chrome/cros_typec_switch.c index dc84cdec8f7f..f85687adb594 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; }; @@ -143,6 +145,15 @@ 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); @@ -159,9 +170,27 @@ 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 = { @@ -230,6 +259,17 @@ static int cros_typec_register_switches(struct cros_typec_switch_data *sdata) } dev_dbg(dev, "Retimer switch registered for index %llu\n", index); + + if (!device_property_present(fwnode->dev, "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; |