diff options
Diffstat (limited to 'driver/usb_mux/usb_mux.c')
| -rw-r--r-- | driver/usb_mux/usb_mux.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/driver/usb_mux/usb_mux.c b/driver/usb_mux/usb_mux.c index 911558905d..cfc91352bc 100644 --- a/driver/usb_mux/usb_mux.c +++ b/driver/usb_mux/usb_mux.c @@ -149,16 +149,24 @@ static inline void exit_low_power_mode(int port) void usb_mux_init(int port) { + int rv; + ASSERT(port >= 0 && port < CONFIG_USB_PD_PORT_MAX_COUNT); if (port >= board_get_usb_pd_port_count()) { return; } - configure_mux(port, USB_MUX_INIT, NULL); + rv = configure_mux(port, USB_MUX_INIT, NULL); - /* Device is always out of LPM after initialization. */ - flags[port] &= ~USB_MUX_FLAG_IN_LPM; + /* + * Mux may fail initialization if it's not powered. Mark this port + * as in LPM mode to try initialization again. + */ + if (rv == EC_ERROR_NOT_POWERED) + flags[port] |= USB_MUX_FLAG_IN_LPM; + else + flags[port] &= ~USB_MUX_FLAG_IN_LPM; } /* |