diff options
| author | Michal Simek <michal.simek@xilinx.com> | 2016-02-03 15:16:51 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2016-02-22 16:21:04 +0100 |
| commit | 6cd0f2a6cd40bdf3d06d60dab86f425285475ea0 (patch) | |
| tree | 7de0768917733b88f256a22856b5bdd927372ec6 | |
| parent | d82d63cc9bc57952cefdd539f7d5c6e9da608cec (diff) | |
serial: zynq: Change logic in putc
Sync logic with Linux kernel where TX empty flag is checked before char
is sent.
This logic is fixing problem with console on zynqmp platform.
For example:
DRAM: 2 GiB
Enabling Caches...
EL Level: �� sdhci@ff170000: 0
Using default environment
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Moritz Fischer <moritz.fischer@ettus.com>
| -rw-r--r-- | drivers/serial/serial_zynq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/serial/serial_zynq.c b/drivers/serial/serial_zynq.c index e79d997cba..66d54e32ab 100644 --- a/drivers/serial/serial_zynq.c +++ b/drivers/serial/serial_zynq.c @@ -19,7 +19,7 @@ DECLARE_GLOBAL_DATA_PTR; -#define ZYNQ_UART_SR_TXFULL 0x00000010 /* TX FIFO full */ +#define ZYNQ_UART_SR_TXEMPTY (1 << 3) /* TX FIFO empty */ #define ZYNQ_UART_SR_TXACTIVE (1 << 11) /* TX active */ #define ZYNQ_UART_SR_RXEMPTY 0x00000002 /* RX FIFO empty */ @@ -97,7 +97,7 @@ static void _uart_zynq_serial_init(struct uart_zynq *regs) static int _uart_zynq_serial_putc(struct uart_zynq *regs, const char c) { - if (readl(®s->channel_sts) & ZYNQ_UART_SR_TXFULL) + if (!(readl(®s->channel_sts) & ZYNQ_UART_SR_TXEMPTY)) return -EAGAIN; writel(c, ®s->tx_rx_fifo); |