Skip to content

[drivers][8250] honor register width for ns16550 earlycon #11889

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
BernardXiong wants to merge 1 commit into
base: master
Choose a base branch
from
Open

[drivers][8250] honor register width for ns16550 earlycon #11889

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
32 changes: 30 additions & 2 deletions components/drivers/serial/device/8250/early.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -143,8 +143,36 @@ static rt_err_t common_early_setup(struct rt_fdt_earlycon *con, const char *opti
RT_FDT_EARLYCON_EXPORT(bcm2835aux, "uart8250", "brcm,bcm2835-aux-uart", common_early_setup);
RT_FDT_EARLYCON_EXPORT(tegra20, "uart8250", "nvidia,tegra20-uart", common_early_setup);
RT_FDT_EARLYCON_EXPORT(dw8250, "uart8250", "snps,dw-apb-uart", common_early_setup);
RT_FDT_EARLYCON_EXPORT(ns16550a, "uart8250", "ns16550a", common_early_setup);
RT_FDT_EARLYCON_EXPORT(ns16550, "uart8250", "ns16550", common_early_setup);

static rt_err_t ns16550_early_setup(struct rt_fdt_earlycon *con, const char *options)
{
rt_uint32_t width = 1;
struct serial8250 *serial = &early_serial8250;

common_init(serial, con);
serial->regshift = 0;
fdt_getprop_u32(con->fdt, con->nodeoffset, "reg-shift", &serial->regshift, RT_NULL);
fdt_getprop_u32(con->fdt, con->nodeoffset, "reg-io-width", &width, RT_NULL);

switch (width)
{
case 1:
serial->iotype = PORT_MMIO;
break;
case 2:
serial->iotype = PORT_MMIO16;
break;
case 4:
serial->iotype = PORT_MMIO32;
break;
default:
return -RT_EINVAL;
}

return serial8250_early_fdt_setup(serial, con, options);
}
RT_FDT_EARLYCON_EXPORT(ns16550a, "uart8250", "ns16550a", ns16550_early_setup);
RT_FDT_EARLYCON_EXPORT(ns16550, "uart8250", "ns16550", ns16550_early_setup);

#ifdef RT_USING_8250_OMAP
static rt_err_t omap8250_early_setup(struct rt_fdt_earlycon *con, const char *options)
Expand Down
Loading