diff options
| -rw-r--r-- | drivers/serial/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/serial/serial-uclass.c | 9 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index b4805a2..1294943 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -134,6 +134,22 @@ config SERIAL_SEARCH_ALL If unsure, say N. +config SERIAL_PROBE_ALL + bool "Probe all available serial devices" + depends on DM_SERIAL + default n + help + The serial subsystem only probes for a single serial device, + but does not probe for other remaining serial devices. + With this option set, we make probing and searching for + all available devices optional. + Normally, U-Boot talks to one serial port at a time, but SBSA + compliant UART devices like PL011 require initialization + by firmware and to let the kernel use serial port for sending + and receiving the characters. + + If unsure, say N. + config SPL_DM_SERIAL bool "Enable Driver Model for serial drivers in SPL" depends on DM_SERIAL && SPL_DM diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c index 58a6541..ead0193 100644 --- a/drivers/serial/serial-uclass.c +++ b/drivers/serial/serial-uclass.c @@ -172,6 +172,15 @@ int serial_init(void) /* Called after relocation */ int serial_initialize(void) { + /* Scanning uclass to probe devices */ + if (IS_ENABLED(CONFIG_SERIAL_PROBE_ALL)) { + int ret; + + ret = uclass_probe_all(UCLASS_SERIAL); + if (ret) + return ret; + } + return serial_init(); } |