diff options
Diffstat (limited to 'drivers/serial/serial_zynq.c')
| -rw-r--r-- | drivers/serial/serial_zynq.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/serial/serial_zynq.c b/drivers/serial/serial_zynq.c index e4e4c39285..0dd6cec82a 100644 --- a/drivers/serial/serial_zynq.c +++ b/drivers/serial/serial_zynq.c @@ -17,8 +17,6 @@ #include <serial.h> #include <linux/err.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 */ @@ -45,7 +43,7 @@ struct zynq_uart_platdata { struct uart_zynq *regs; }; -/* Set up the baud rate in gd struct */ +/* Set up the baud rate */ static void _uart_zynq_serial_setbrg(struct uart_zynq *regs, unsigned long clock, unsigned long baud) { @@ -140,9 +138,12 @@ static int zynq_serial_setbrg(struct udevice *dev, int baudrate) static int zynq_serial_probe(struct udevice *dev) { struct zynq_uart_platdata *platdata = dev_get_platdata(dev); + struct uart_zynq *regs = platdata->regs; + u32 val; - /* No need to reinitialize the UART after relocation */ - if (gd->flags & GD_FLG_RELOC) + /* No need to reinitialize the UART if TX already enabled */ + val = readl(®s->control); + if (val & ZYNQ_UART_CR_TX_EN) return 0; _uart_zynq_serial_init(platdata->regs); |