From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vabhav Sharma Date: Mon, 15 Oct 2018 05:39:49 +0530 Subject: [U-Boot] [PATCH] drivers: serial: probe all serial devices Message-ID: <1539562189-3137-1-git-send-email-vabhav.sharma@nxp.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Serial subsystem search and probe only one first serial device and unable to use remaining available UART devices This patch changes the logic to probe all available serial devices using platform data or device tree in DM model in order to use all UART devices Signed-off-by: Vabhav Sharma --- drivers/serial/Kconfig | 12 ++++++++++++ drivers/serial/serial-uclass.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+) diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 597db4b..d6451b1 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -133,6 +133,18 @@ config SERIAL_SEARCH_ALL If unsure, say N. +config SERIAL_PROBE_ALL + bool "Probe all available serial devices" + depends on DM_SERIAL + help + The serial subsystem only probe for single serial device, but does + not probe for remaining available devices. + With this option set,we make probing for all available devices + mandatory. + + If probing is not required for all remaining available + devices other than default current console device, 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 e50f0aa..405e60e 100644 --- a/drivers/serial/serial-uclass.c +++ b/drivers/serial/serial-uclass.c @@ -82,6 +82,13 @@ static void serial_find_console_or_panic(void) uclass_first_device(UCLASS_SERIAL, &dev); if (dev) { gd->cur_serial_dev = dev; +#ifdef CONFIG_SERIAL_PROBE_ALL + /* Scanning uclass to probe all devices */ + for (; + dev; + uclass_next_device(&dev)) + ; +#endif return; } } else if (CONFIG_IS_ENABLED(OF_CONTROL) && blob) { @@ -92,11 +99,25 @@ static void serial_find_console_or_panic(void) if (np && !uclass_get_device_by_ofnode(UCLASS_SERIAL, np_to_ofnode(np), &dev)) { gd->cur_serial_dev = dev; +#ifdef CONFIG_SERIAL_PROBE_ALL + /* Scanning uclass to probe all devices */ + for (; + dev; + uclass_next_device(&dev)) + ; +#endif return; } } else { if (!serial_check_stdout(blob, &dev)) { gd->cur_serial_dev = dev; +#ifdef CONFIG_SERIAL_PROBE_ALL + /* Scanning uclass to probe all devices */ + for (; + dev; + uclass_next_device(&dev)) + ; +#endif return; } } @@ -121,6 +142,13 @@ static void serial_find_console_or_panic(void) !uclass_get_device(UCLASS_SERIAL, INDEX, &dev)) { if (dev->flags & DM_FLAG_ACTIVATED) { gd->cur_serial_dev = dev; +#ifdef CONFIG_SERIAL_PROBE_ALL + /* Scanning uclass to probe all devices */ + for (; + dev; + uclass_next_device(&dev)) + ; +#endif return; } } @@ -132,6 +160,13 @@ static void serial_find_console_or_panic(void) if (!ret) { /* Device did succeed probing */ gd->cur_serial_dev = dev; +#ifdef CONFIG_SERIAL_PROBE_ALL + /* Scanning uclass to probe all devices */ + for (; + dev; + uclass_next_device(&dev)) + ; +#endif return; } } @@ -140,6 +175,13 @@ static void serial_find_console_or_panic(void) !uclass_get_device(UCLASS_SERIAL, INDEX, &dev) || (!uclass_first_device(UCLASS_SERIAL, &dev) && dev)) { gd->cur_serial_dev = dev; +#ifdef CONFIG_SERIAL_PROBE_ALL + /* Scanning uclass to probe all devices */ + for (; + dev; + uclass_next_device(&dev)) + ; +#endif return; } #endif -- 2.7.4