Commit 0e125a5facf8 ("tty: amba-pl011: define flag register bits for ZTE
device") changes earlycon function pl011_putc() to use a pointer to
uart_amba_port. This causes a regression when earlycon is enabled,
because uart_amba_port is not available yet at earlycon time. Let's
revert the change on pl011_putc() to fix the regression.
The earlycon support for ZTE device can probably be added later by
declaring a new earlycon setup function with a vendor specific
compatible.
Reported-by: Sudeep Holla <sudeep.holla@xxxxxxx>
Fixes: 0e125a5facf8 ("tty: amba-pl011: define flag register bits for ZTE device")
Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
---
drivers/tty/serial/amba-pl011.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 0b78b04e895e..2d9ffab16ffe 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -2330,16 +2330,13 @@ static struct console amba_console = {
static void pl011_putc(struct uart_port *port, int c)
{
- struct uart_amba_port *uap =
- container_of(port, struct uart_amba_port, port);
-
while (readl(port->membase + UART01x_FR) & UART01x_FR_TXFF)
cpu_relax();
if (port->iotype == UPIO_MEM32)
writel(c, port->membase + UART01x_DR);
else
writeb(c, port->membase + UART01x_DR);
- while (readl(port->membase + UART01x_FR) & uap->vendor->fr_busy)
+ while (readl(port->membase + UART01x_FR) & UART01x_FR_BUSY)
cpu_relax();
}
--
1.9.1
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