From: Akshay Saraswat akshay.s@samsung.com
Adding a generic polling function to continuously monitor events and trigger actions corresponding to them.
Signed-off-by: Akshay Saraswat akshay.s@samsung.com Acked-by: Simon Glass sjg@chromium.org --- Changes since v1: - Removed GEN tag from subject - Changed description comment for board_poll_devices function - Added Acked-by: Simon Glass
README | 7 +++++++ common/console.c | 5 +++++ include/common.h | 6 ++++++ 3 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/README b/README index 2572add..72b3b67 100644 --- a/README +++ b/README @@ -2814,6 +2814,13 @@ Configuration Settings: the application (usually a Linux kernel) when it is booted
+- CONFIG_BOARD_POLL + There are various scenarios in which parallel-thread like + polling is required to monitor status of variety of devices. + For such situations CONFIG_BOARD_POLL shall be enabled + and funtion call board_poll_devices() from console_tstc() + will then poll for the device status as defined inside function. + - CONFIG_SYS_BAUDRATE_TABLE: List of legal baudrate settings for this board.
diff --git a/common/console.c b/common/console.c index 1177f7d..d320b9b 100644 --- a/common/console.c +++ b/common/console.c @@ -117,6 +117,11 @@ static int console_tstc(int file) int i, ret; struct stdio_dev *dev;
+#if defined CONFIG_BOARD_POLL + /* Generic polling function */ + board_poll_devices(); +#endif + disable_ctrlc(1); for (i = 0; i < cd_count[file]; i++) { dev = console_devices[file][i]; diff --git a/include/common.h b/include/common.h index b23e90b..70a348d 100644 --- a/include/common.h +++ b/include/common.h @@ -782,6 +782,12 @@ void clear_ctrlc (void); /* clear the Control-C condition */ int disable_ctrlc (int); /* 1 to disable, 0 to enable Control-C detect */
/* + * A generic polling function. + * This will be called form console_tstc() to poll for various events. + */ +void board_poll_devices(void); + +/* * STDIO based functions (can always be used) */ /* serial stuff */