diff options
| author | Peng Fan <[email protected]> | 2019-12-20 06:13:36 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2020-01-06 20:22:36 +0100 |
| commit | 3966f0846c036bcee2740df619ed421deb78f941 (patch) | |
| tree | 41dd114ea8acdeda1235d874a557abcf81090f74 | |
| parent | a659652f6169240a5818cb244b280c5a362ef5a4 (diff) | |
tty: serial: fsl_lpuart: support UPIO_MEM32 for lpuart32
"earlycon" no need to specify the value string since it uses
stdout-path parameters. However when earlycon and normal console
are not using the same uart port, we need specify value string
to earlycon, this is what we need to do when support dual linux
using jailhouse hypervisor. The 2nd linux will use the uart
of the 1st linux as earlycon.
earlycon=lpuart32,mmio32,0x5a060010,115200 not work for i.MX8QXP.
It is because lpuart32_early_console_setup not support little endian.
Since the original code is to support UPIO_MEM32BE, so if not
UPIO_MEM32, we still take it as UPIO_MEM32BE
Acked-by: Fugang Duan <[email protected]>
Signed-off-by: Peng Fan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 17f1aa1f6483..611036b42f39 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -2368,7 +2368,9 @@ static int __init lpuart32_early_console_setup(struct earlycon_device *device, if (!device->port.membase) return -ENODEV; - device->port.iotype = UPIO_MEM32BE; + if (device->port.iotype != UPIO_MEM32) + device->port.iotype = UPIO_MEM32BE; + device->con->write = lpuart32_early_write; return 0; } |