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| author | Simon Glass <sjg@chromium.org> | 2014-10-22 21:37:02 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2014-10-23 19:29:07 -0600 |
| commit | c487fd476c8779dbd6ee1427489f1312b34bfc5e (patch) | |
| tree | 49211e4c6df93f064408ef73a4978bd780d70fe6 /drivers/serial | |
| parent | fe1ef503381c4c03c059de3324271ce21cae3078 (diff) | |
| download | u-boot-imx-c487fd476c8779dbd6ee1427489f1312b34bfc5e.zip u-boot-imx-c487fd476c8779dbd6ee1427489f1312b34bfc5e.tar.gz u-boot-imx-c487fd476c8779dbd6ee1427489f1312b34bfc5e.tar.bz2 | |
dm: serial: Reset the watchdog while waiting in getc()
We have moved the busy-wait loop out of drivers and into the uclass. This
means that we must reset the watchdog when busy-waiting.
Note: some drivers may still have a busy-wait even with driver model, as
a transition mechanism. Driver model will tolerate this, and is can be
cleaned up when all users of the driver use driver model. An example is
ns16550.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/serial-uclass.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/serial/serial-uclass.c b/drivers/serial/serial-uclass.c index 1a75950..1983a3d 100644 --- a/drivers/serial/serial-uclass.c +++ b/drivers/serial/serial-uclass.c @@ -11,9 +11,12 @@ #include <os.h> #include <serial.h> #include <stdio_dev.h> +#include <watchdog.h> #include <dm/lists.h> #include <dm/device-internal.h> +#include <ns16550.h> + DECLARE_GLOBAL_DATA_PTR; /* The currently-selected console serial device */ @@ -119,6 +122,8 @@ static int serial_getc_dev(struct udevice *dev) do { err = ops->getc(dev); + if (err == -EAGAIN) + WATCHDOG_RESET(); } while (err == -EAGAIN); return err >= 0 ? err : 0; |