This issue was found when OF_LIVE was enabled that there are scrambled chars on the console like this: Chip ID: zu3eg Watchdog: Started��j� sdhci@ff160000: 0, sdhci@ff170000: 1 In: serial@ff010000
I found a solution for this problem exactly the same as I found later in serial_msm fixed by: "serial: serial_msm: initialize uart only before relocation" (sha1: 7e5ad796bcd65772a87da236ae21cd536ae3a4d2) What it is happening is that output TX fifo still contains chars to be sent and _uart_zynq_serial_init() resets TX fifo even in the middle of transfer. Signed-off-by: Michal Simek <[email protected]> --- drivers/serial/serial_zynq.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/serial/serial_zynq.c b/drivers/serial/serial_zynq.c index 4ae24939ab23..cc14bfa39cff 100644 --- a/drivers/serial/serial_zynq.c +++ b/drivers/serial/serial_zynq.c @@ -15,6 +15,8 @@ #include <linux/compiler.h> #include <serial.h> +DECLARE_GLOBAL_DATA_PTR; + #define ZYNQ_UART_SR_TXACTIVE BIT(11) /* TX active */ #define ZYNQ_UART_SR_TXFULL BIT(4) /* TX FIFO full */ #define ZYNQ_UART_SR_RXEMPTY BIT(1) /* RX FIFO empty */ @@ -137,6 +139,10 @@ static int zynq_serial_probe(struct udevice *dev) { struct zynq_uart_priv *priv = dev_get_priv(dev); + /* No need to reinitialize the UART after relocation */ + if (gd->flags & GD_FLG_RELOC) + return 0; + _uart_zynq_serial_init(priv->regs); return 0; -- 1.9.1 _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
